I have an Activity that Displays Fragments one at a time , now each fragment load it data from server and keep fetching data in a list , the user can display another fragment in the activity by selecting an item in the Spinner that displayed in the ActonBar.
here is the code for the Activity
public class HomeActivity extends SherlockFragmentActivity .....{
private class ListInfo {
private String tag;
private Class<?> clss;
private Bundle bundle;
private Fragment fragment;
public ListInfo(String tag, Class<?> clss, Bundle bundle) {
this.tag = tag;
this.clss = clss;
this.bundle = bundle;
}
}
String[] naviStrings;
private HashMap<String, ListInfo> listMap = new HashMap<String, HomeActivity.ListInfo>();
private ListInfo mLastListInfo = null;
private int currentSelectedOptionInSpinner;
ChannelFragment fr;
#SuppressWarnings("unchecked")
#Override
protected void onCreate(Bundle arg0) {
super.onCreate(arg0);
Log.d("HomeActivity", "onCreate");
Log.d("onCreate bundle", "" + arg0);
setContentView(R.layout.test);
naviStrings = getResources().getStringArray(
R.array.action_bar_spinner_entries);
initializeList(arg0);
Context context = getSupportActionBar().getThemedContext();
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
context, R.array.action_bar_spinner_entries,
R.layout.sherlock_spinner_item);
adapter.setDropDownViewResource(R.layout.sherlock_spinner_dropdown_item);
getSupportActionBar().setNavigationMode(ActionBar.NAVIGATION_MODE_LIST);
getSupportActionBar().setListNavigationCallbacks(adapter, this);
getSupportActionBar().setSelectedNavigationItem(
currentSelectedOptionInSpinner);
}
private void initializeList(Bundle args) {
ListInfo listInfo = null;
// add first Fragment
listMap.put(naviStrings[5], (listInfo = new ListInfo(naviStrings[5],
AboutUsActivity.class, args)));
addFragmentToList(this, listInfo);
listMap.put(naviStrings[3], (listInfo = new ListInfo(naviStrings[3],
Fragment1.class, args)));
addFragmentToList(this, listInfo);
listMap.put(naviStrings[2], (listInfo = new ListInfo(naviStrings[2],
Fragment2.class, args)));
addFragmentToList(this, listInfo);
listMap.put(naviStrings[1], (listInfo = new ListInfo(naviStrings[1],
Fragment3.class, args)));
addFragmentToList(this, listInfo);
listMap.put(naviStrings[4], (listInfo = new ListInfo(naviStrings[4],
Fragment4.class, args)));
addFragmentToList(this, listInfo);
if (args != null) {
Toast.makeText(this, "args is not null", Toast.LENGTH_SHORT).show();
// set the current selected index in the ActionBar spinner
if (args.getInt(
ApplicationMetaData.IntentData.LAST_SELECTED_ITEM_SPINNER,
-1) > -1
&& args.getInt(
ApplicationMetaData.IntentData.LAST_SELECTED_ITEM_SPINNER,
-1) < naviStrings.length) {
Toast.makeText(this, "selected is not null",
Toast.LENGTH_SHORT).show();
currentSelectedOptionInSpinner = args
.getInt(ApplicationMetaData.IntentData.LAST_SELECTED_ITEM_SPINNER);
} else {
currentSelectedOptionInSpinner = 2;
}
} else {
currentSelectedOptionInSpinner = 2;
}
onNavigationItemSelected(currentSelectedOptionInSpinner, 0);
}
private static void addFragmentToList(SherlockFragmentActivity activity,
ListInfo instanse) {
// check to see if we already have a fragment for this tab , probably
// from a previously save state.
// if so deactivated it ,because our initial state is that a tab is not
// shown.
String tag = instanse.tag;
instanse.fragment = activity.getSupportFragmentManager()
.findFragmentByTag(tag);
if (instanse.fragment != null && !instanse.fragment.isDetached()) {
FragmentTransaction ft = activity.getSupportFragmentManager()
.beginTransaction();
ft.detach(instanse.fragment);
ft.commit();
activity.getSupportFragmentManager().executePendingTransactions();
}
}
#Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putInt(
ApplicationMetaData.IntentData.LAST_SELECTED_ITEM_SPINNER,
currentSelectedOptionInSpinner);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
return super.onCreateOptionsMenu(menu);
}
#Override
public boolean onNavigationItemSelected(int itemPosition, long itemId) {
Log.d("onNavigationItemSelected", "" + itemPosition);
if (itemPosition == 5) {
Intent i = new Intent(this, AboutUsActivity.class);
startActivity(i);
return true;
}
Log.d("fragment data", listMap.get(naviStrings[itemPosition]) + "");
ListInfo newtItem = listMap.get(naviStrings[itemPosition]);
if (newtItem != mLastListInfo) {
FragmentTransaction ft = this.getSupportFragmentManager()
.beginTransaction();
if (mLastListInfo != null) {
if (mLastListInfo.fragment != null) {
ft.detach(mLastListInfo.fragment);
}
}
if (newtItem != null) {
if (newtItem.fragment == null) {
// create and add
newtItem.fragment = Fragment.instantiate(this,
newtItem.clss.getName(), newtItem.bundle);
ft.add(android.R.id.content, newtItem.fragment,
newtItem.tag);
} else {
ft.attach(newtItem.fragment);
}
}
mLastListInfo = newtItem;
ft.commit();
this.getSupportFragmentManager().executePendingTransactions();
return true;
}
return false;
}}
now when i navigate from one fragment to another lets say from Fragment1 to Fragment2 when i return back to fragment1 it preserve it state and does not have to load it data from the beginning , but if i start a new Activity from the home Activity the system destroy the Activity and the Fragments in it , is There a way to preserve these Fragment note when i rotate the Home Activity nothing happened , only if i start a new Activity ??????
UPDATE
in all of the Four Fragment i make in the onCreate setRetaineInstance(true);
One option is to override saveInstanceState in your Fragments and/or Activites in order to persist data and later retrieve it from the Bundle that gets passed into onActivityCreated/onCreate.
If you are dealing with large sets of data, you may be better off using another persistence mechanism like the SQLite database
Related
I have a fragment in an activity that uses Firestore snapshot listener. When I first start the fragment, it works fine. But then if I navigate to another fragment and return, I get an empty snapshot. How do I get it to fetch the snapshot properly again?
Here is the query with the listener registration:
private void setupRecyclerView() {
if (mealplanRecycler == null) {
mealplanRecycler = mealplanView.findViewById(R.id.mealplan_recycler);
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(mealplanContext);
linearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);
mealplanRecycler.setHasFixedSize(true);
mealplanRecycler.setLayoutManager(linearLayoutManager);
}
getMealplans();
}
private void getMealplans() {
String userId = (bundle != null && bundle.containsKey("userId")) ? bundle.getString("userId") : "";
Query mealplanQuery = firebaseFirestore.collection("Meal_Plans").whereEqualTo("userId", userId).orderBy("timeOfCreation", Query.Direction.DESCENDING);
registration = mealplanQuery.addSnapshotListener((value, error) -> {
toolbarProgressbar.setVisibility(View.GONE);
mealplanArrayList = new ArrayList<>();
if (error == null && value != null) {
for (QueryDocumentSnapshot document : value) {
Mealplan mealplan = document.toObject(Mealplan.class);
Mealplan updatedmealplan = updateTime(mealplan);
mealplanArrayList.add(updatedmealplan);
if (mealplanArrayList.size() > 0) {
tvAddMealplan.setVisibility(View.GONE);
ivAddmealplan.setVisibility(View.GONE);
}
}
if (mealPlanAdapter != null) {
mealPlanAdapter.setItems(mealplanArrayList);
mealPlanAdapter.notifyDataSetChanged();
} else {
String planId = (bundle != null && bundle.containsKey("planId")) ? bundle.getString("planId") : "none";
mealPlanAdapter = new MealPlanAdapter(mealplanContext, mealplanArrayList, planId);
mealplanRecycler.setAdapter(mealPlanAdapter);
}
mealPlanAdapter.setEditMealplanListener(this::onButtonPressed);
} else {
Log.d(TAG, "error is not null: " + Objects.requireNonNull(error).getLocalizedMessage());
toolbarProgressbar.setVisibility(View.GONE);
tvAddMealplan.setVisibility(View.GONE);
}
});
}
And this is how I am creating the fragment in Main Activity:
MealplanFragment fragment = new MealplanFragment();
FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction().setCustomAnimations(R.anim.enter_from_right, R.anim.exit_to_right, R.anim.enter_from_right, R.anim.exit_to_right).replace(R.id.frame_container, fragment, null);
fragmentTransaction.commit();
A fragment's onCreateView is called only once when the fragment's view is being created. From then on it will be called again only if the view is destroyed and needs to be recreated. It is what function onCreate is for an Activity.
So, when you switch between fragments it is not called.
The solution is to place the listener registration code in a function that will be called when switching fragments.
You can try onHiddenChanged function:
#Override
public void onHiddenChanged(boolean hidden) {
super.onHiddenChanged(hidden);
if (hidden) {
}
else {
}
}
or
#Override
public void setUserVisibleHint(boolean isVisibleToUser) {
super.setUserVisibleHint(isVisibleToUser);
if (isVisibleToUser) {
} else {
}
}
The above are deprecated in API level 28. So, you can also try setMenuVisibility:
#Override
public void setMenuVisibility(boolean isvisible) {
super.setMenuVisibility(isvisible);
if (isvisible){
Log.d("Viewpager", "fragment is visible ");
}else {
Log.d("Viewpager", "fragment is not visible ");
}
}
I have researched this error on StackOverflow and tried all the suggestions but still have the error. App tries to load and I can see the home screen behind several of the alerts and an error that the app closed.
Things I've tried:
adding to Manifest -
in MainActivity, ensuring I'm using "this" in lieu of other references
adding to AlertDialog -
dialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
NOTE: I've also commented out out everything from the onCreate() in MainActivity after setContentView(R.layout.activity_main); and still have the error. I suspect the issue is directly related to how I'm using my fragment and the tjerk. ActionSlideExpandableListView menu.
My code:
MainActivity
public class MainActivity extends Activity implements DataPasser {
private final String LOGCAT = "MAINACTIVITY.LOGCAT";
private DrawerLayout mDrawerLayout;
Toolbar toolbar;
private ListView mDrawerList;
private ActionBarDrawerToggle mDrawerToggle;
Fragment fragment = null;
// nav drawer title
private CharSequence mDrawerTitle;
// used to store app title
private CharSequence mTitle;
// slide menu items
private String[] navMenuTitles;
private TypedArray navMenuIcons;
Menu menuMain;
private ArrayList<NavDrawerItem> navDrawerItems;
private NavDrawerListAdapter adapter;
// --------------------------------------------------
private final String PREF_NAME = "band_wit";
String firstLaunch = "firstLaunch", itemPosition = "2";
private TCPdump tcpdump = null;
private TCPdumpHandler tcpDumpHandler = null;
static public String local_Ip_Address;
DBHelper dbHelper;
FragmentManager fragmentManager;
private MyReceiver receiver;
private static final int VPN_REQUEST_CODE = 0x0F;
private boolean waitingForVPNStart;
public static String APP_UID;
public static String NETFLIX_APP_UID;
public static String FACEBOOK_APP_UID;
private BroadcastReceiver vpnStateReceiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
if (LocalVPNService.BROADCAST_VPN_STATE.equals(intent.getAction())) {
if (intent.getBooleanExtra("running", false))
waitingForVPNStart = false;
}
}
};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
dbHelper = DBHelper.newInstance(this);
local_Ip_Address = getLocalIpAddress();
// Local VPN
LocalBroadcastManager.getInstance(this).registerReceiver(
vpnStateReceiver,
new IntentFilter(LocalVPNService.BROADCAST_VPN_STATE));
// ====
Intent tcp_Dump_Inent = new Intent(MainActivity.this,TcpDumpService.class);
startService(tcp_Dump_Inent);
/* start service for download manager */
startService(new Intent(this, MyDownloaderMangerService.class));
mTitle = mDrawerTitle = getTitle();
// load slide menu items
navMenuTitles = getResources().getStringArray(R.array.nav_drawer_items);
// nav drawer icons from resources
navMenuIcons = getResources()
.obtainTypedArray(R.array.nav_drawer_icons);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerList = (ListView) findViewById(R.id.list_slidermenu);
navDrawerItems = new ArrayList<NavDrawerItem>();
// adding nav drawer items to array
// Home
navDrawerItems.add(new NavDrawerItem(navMenuTitles[0], navMenuIcons
.getResourceId(0, -1)));
// Find People
// Photos
navDrawerItems.add(new NavDrawerItem(navMenuTitles[2], navMenuIcons
.getResourceId(2, -1)));
// Communities, Will add a counter here
navDrawerItems.add(new NavDrawerItem(navMenuTitles[3], navMenuIcons
.getResourceId(3, -1)));
// Pages
// Recycle the typed array
navMenuIcons.recycle();
mDrawerList.setOnItemClickListener(new SlideMenuClickListener());
// ** setting the nav drawer list adapter
adapter = new NavDrawerListAdapter(this,
navDrawerItems);
mDrawerList.setAdapter(adapter);
// enabling action bar app icon and behaving it as toggle button
getActionBar().setDisplayHomeAsUpEnabled(true);
getActionBar().setHomeButtonEnabled(true);
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
toolbar,
//R.drawable.ic_drawer,
R.string.app_name,
R.string.app_name)
{
public void onDrawerClosed(View view) {
getActionBar().setTitle(mTitle);
// calling onPrepareOptionsMenu() to show action bar icons
invalidateOptionsMenu();
}
public void onDrawerOpened(View drawerView) {
getActionBar().setTitle(mDrawerTitle);
// calling onPrepareOptionsMenu() to hide action bar icons
invalidateOptionsMenu();
}
};
mDrawerLayout.setDrawerListener(mDrawerToggle);
if (savedInstanceState == null) {
// on first time display view for first nav item
displayView(0);
}
startService(new Intent(this, MyService.class));
// Run when application first time launched
Const.preferences = getSharedPreferences(PREF_NAME, MODE_PRIVATE);
boolean isFirstTime = Const.preferences.getBoolean(firstLaunch, true);
if (isFirstTime) {
Const.preferences.edit().putBoolean(firstLaunch, false).commit();
addBgData(Const.preferences);
setInitialDataBucket();
AlertDialog.Builder builder = new AlertDialog.Builder(this);
LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View view = inflater.inflate(R.layout.splash_screen, null);
builder.setView(view);
dialog = builder.create();
dialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
dialog.show();
}
APP_UID = myAppUid("com.oda.bandwit");
NETFLIX_APP_UID = myAppUid("com.netflix.mediaclient");
FACEBOOK_APP_UID = myAppUid("com.facebook.katana");
}
#Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
try {
IntentFilter filter = new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION);
receiver = new MyReceiver();
registerReceiver(receiver, filter);
} catch (Exception e) {
// TODO: handle exception
}
startVPN();
}
#Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
try {
unregisterReceiver(receiver);
} catch (Exception e) {
// TODO: handle exception
}
}
/**
* Slide menu item click listener
* */
private class SlideMenuClickListener implements
ListView.OnItemClickListener {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
// display view for selected nav drawer item
displayView(position);
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// toggle nav drawer on selecting action bar app icon/title
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
int fragment = 0;
Fragment f = this.getFragmentManager().findFragmentById(
R.id.frame_container);
if (f instanceof HomeFragment) {
fragment = 0;
} else if (f instanceof GeneralSettingsFragment) {
fragment = 1;
} else if (f instanceof ApplicationSettinsFragment) {
fragment = 2;
} else if (f instanceof NetworkSettingsFragment) {
fragment = 3;
} else if (f instanceof GraphAnalysisFragment) {
fragment = 4;
}
// Handle action bar actions click
switch (item.getItemId()) {
case R.id.menuToday:
menuMain.findItem(R.id.menuSelectedItem).setTitle("Today");
itemPosition = "0";
displayView(fragment);
return true;
case R.id.menuThisWeek:
menuMain.findItem(R.id.menuSelectedItem).setTitle("Current Week");
itemPosition = "1";
displayView(fragment);
return true;
case R.id.menuThisMonth:
menuMain.findItem(R.id.menuSelectedItem).setTitle("Current Month");
itemPosition = "2";
displayView(fragment);
return true;
default:
return super.onOptionsItemSelected(item);
}
}
/* *
* Called when invalidateOptionsMenu() is triggered
*/
#Override
public boolean onPrepareOptionsMenu(Menu menu) {
menuMain = menu;
// if nav drawer is opened, hide the action items
boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList);
menuMain.findItem(R.id.menuToday).setVisible(!drawerOpen);
menuMain.findItem(R.id.menuThisWeek).setVisible(!drawerOpen);
menuMain.findItem(R.id.menuThisMonth).setVisible(!drawerOpen);
menuMain.getItem(Integer.parseInt(itemPosition)).setChecked(true);
return super.onPrepareOptionsMenu(menuMain);
}
/**
* Diplaying fragment view for selected nav drawer list item
* */
private void displayView(int position) {
// update the main content by replacing fragments
switch (position) {
case 0:
try {
fragment = new HomeFragment("" + itemPosition);
callFragment(position);
} catch (Exception e) {
e.getMessage();
}
break;
case 1:
fragment = new ApplicationSettinsFragment();
callFragment(position);
break;
case 2:
startActivity(new Intent(MainActivity.this, GraphicalAnalysis.class));
break;
case 3:
sendMail();
break;
case 4:
dialog = new Dialog(MainActivity.this);
Toast.makeText(MainActivity.this, "Change Limit", Toast.LENGTH_SHORT).show();
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setTitle("Set Threshold");
ListView list=new ListView(MainActivity.this);
ArrayAdapter<String>adapter = new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_list_item_1,
new String[]{"5","10","15","20","25","30","35","40","45","50","55","60","65","70","75","80","85","90","95","100","105","110","115","120","125","130","135","140","145","150","155","160","165","170","175","180","185","190","195","200"});
list.setAdapter(adapter);
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View arg1,
int position, long arg3) {
Toast.makeText(MainActivity.this,
"Now Threshold " + (position + 1) * 5 +" is set",
Toast.LENGTH_SHORT).show();
LocalVPNService.netFlixMaxVal = (position + 1) * 5;
navDrawerItems.get(4).setCount(""+LocalVPNService.netFlixMaxVal);
MainActivity.this.adapter.notifyDataSetChanged();
if (dialog.isShowing()) {
dialog.dismiss();
}
}
});
builder.setView(list);
dialog=builder.create();
dialog.show();
break;
case 5:
fragment = new WhatsHotFragment();
callFragment(position);
break;
default:
break;
}
}
Dialog dialog;
private void callFragment(int position) {
if (fragment != null) {
fragmentManager = getFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.frame_container, fragment).commit();
// update selected item and title, then close the drawer
mDrawerList.setItemChecked(position, true);
mDrawerList.setSelection(position);
setTitle(navMenuTitles[position]);
mDrawerLayout.closeDrawer(mDrawerList);
} else {
// error in creating fragment
Log.e("MainActivity", "Error in creating fragment");
}
}
#Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
// Sync the toggle state after onRestoreInstanceState has occurred.
mDrawerToggle.syncState();
}
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
// Pass any configuration change to the drawer toggls
mDrawerToggle.onConfigurationChanged(newConfig);
}
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == VPN_REQUEST_CODE && resultCode == RESULT_OK) {
startService(new Intent(this, LocalVPNService.class));
}
}
}
Home Fragment
public class HomeFragment extends Fragment {
Boolean checked;
DBHelper dbHelper;
String filterFlag = "", networkTypeSelected = "";
CustomAdapter adap = null;
OnClickListener clickListener;
TextView tvNetworkType;
SharedPreferences prefs;
private static String FILENAME = "mlogs.txt";
public HomeFragment() {
// TODO Auto-generated constructor stub
}
public HomeFragment(String dataFilter) {
filterFlag = dataFilter;
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
final View rootView = inflater.inflate(R.layout.fragment_home,
container, false);
prefs = PreferenceManager.getDefaultSharedPreferences(getActivity());
try {
dbHelper = DBHelper.newInstance(getActivity());
tvNetworkType = (TextView) rootView
.findViewById(R.id.tvNetworkTypeHome);
clickListener = new View.OnClickListener() {
#Override
public void onClick(View v) {
Editor edit = prefs.edit();
if (v.getId() == R.id.btnCellularHome) {
checked = false;
tvNetworkType.setText("Cellular Data");
edit.putString("network", "0");
} else if (v.getId() == R.id.btnWifiHome) {
checked = true;
tvNetworkType.setText("Wi-fi Data");
edit.putString("network", "1");
}
edit.commit();
setListViewData(rootView);
}
};
rootView.findViewById(R.id.btnCellularHome).setOnClickListener(
clickListener);
rootView.findViewById(R.id.btnWifiHome).setOnClickListener(
clickListener);
if (prefs.getString("network", "0").equalsIgnoreCase("1")) {
checked = true;
tvNetworkType.setText("Wi-fi Data");
} else {
tvNetworkType.setText("Cellular Data");
checked = false;
}
setListViewData(rootView);
} catch (Exception e) {
e.getMessage();
}
TextView ytdata = (TextView) rootView.findViewById(R.id.ytdata);
TcpDumpUtills tcpDumpUtills = new TcpDumpUtills(getActivity());
ytdata.setText(StringUtils.formatToMultiplier(tcpDumpUtills
.getAppsConsumedData("com.google.android.youtube")));
ytdata.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
try {
File file = new File(Environment.getExternalStorageDirectory() + File.separator + "test.txt");
Process process = Runtime.getRuntime().exec("logcat -d");
BufferedReader bufferedReader = new BufferedReader(
new InputStreamReader(process.getInputStream()));
StringBuilder log=new StringBuilder();
String line;
while ((line = bufferedReader.readLine()) != null) {
log.append(line);
}
writeDataToFile(log.toString());
} catch (IOException e) {
}
}
});
super.onSaveInstanceState(savedInstanceState);
return rootView;
}
#Override
public void onAttach(Activity activity) {
super.onAttach(activity);
//mContext = activity;
}
public void writeDataToFile(String data){
// write on SD card file data in the text box
try {
File myFile = new File("/sdcard/mysdfile.txt");
myFile.createNewFile();
FileOutputStream fOut = new FileOutputStream(myFile);
OutputStreamWriter myOutWriter =
new OutputStreamWriter(fOut);
myOutWriter.append(data);
myOutWriter.close();
fOut.close();
Toast.makeText(getActivity(),
"Done writing SD 'mysdfile.txt'",
Toast.LENGTH_SHORT).show();
} catch (Exception e) {
Toast.makeText(getActivity(), e.getMessage(),
Toast.LENGTH_SHORT).show();
}
}
private void writeToFile(String data) {
try {
OutputStreamWriter outputStreamWriter = new OutputStreamWriter(getActivity().openFileOutput(FILENAME, Context.MODE_PRIVATE));
outputStreamWriter.write(data);
outputStreamWriter.close();
}
catch (IOException e) {
Log.e("Logss", "File write failed: " + e.toString());
}
}
public ListAdapter getData() {
Resources res = getResources();
ArrayList<ListModel> arr = new ArrayList<ListModel>();
ArrayList<ListModel> arrFinal = new ArrayList<ListModel>();
String networkType = "";
if (checked) {
networkType = "1";
} else {
networkType = "0";
}
PackageManager manager = getActivity().getPackageManager();
arr = dbHelper.getAppsDataAccordingToNetworkType(networkType);
if (arr.size() >= 1) {
for (ListModel modelGetter : arr) {
ListModel modelSetter = new ListModel();
String packageName = modelGetter.getAppName();
// Setting App Name
try {
ApplicationInfo appInfo = manager.getApplicationInfo(
modelGetter.getAppName(), 0);
String appName = "" + manager.getApplicationLabel(appInfo);
modelSetter.setAppName(appName);
// Setting Total Data Consumned by the app
long appTotalData = getTotalDataPerApp(modelGetter
.getAppName());
modelSetter.setDataConsumed(appTotalData);
String appTotalDataStr = CommonFunctions
.humanReadableByteCount(appTotalData, false);
modelSetter.setTotalData(appTotalDataStr);
// Setting Total Data as per the network selected
long networkDataPerApp = getDailyNetworkDataPerApp(
modelGetter.getNetworkData(), packageName);
String networkDataStr = CommonFunctions
.humanReadableByteCount(networkDataPerApp, false);
modelSetter.setNetworkData(networkDataStr);
double percd = networkDataPerApp / (double) appTotalData
* 100;
int perc = (int) percd;
modelSetter.setPercenatge(perc);
// Setting App Icon
Drawable draw = manager.getApplicationIcon(modelGetter
.getAppName());
modelSetter.setDrawable(draw);
// Setting Today's Data
long appTodaysData = getUsageData(packageName);
String appTodayDataStr = CommonFunctions
.humanReadableByteCount(appTodaysData, false);
modelSetter.setTodaysData(appTodayDataStr);
Calendar cal = Calendar.getInstance();
long dayOfWeek = cal.get(Calendar.DAY_OF_WEEK);
long dayOfMonth = cal.get(Calendar.DAY_OF_MONTH);
long time = cal.get(Calendar.HOUR_OF_DAY);
long appConsumptionRate = getConsumptionRate(cal,
appTotalData);
String appConsumptionDataStr = CommonFunctions
.humanReadableByteCount(appConsumptionRate, false);
if (filterFlag.equalsIgnoreCase("0")) {
appConsumptionDataStr = appConsumptionDataStr + " /hr";
} else if (filterFlag.equalsIgnoreCase("1")) {
appConsumptionDataStr = appConsumptionDataStr + " /day";
}else if (filterFlag.equalsIgnoreCase("2")) {
appConsumptionDataStr = appConsumptionDataStr + " /day.";
}
modelSetter.setConsumptionRate(appConsumptionDataStr);
// Setting Forecast Data
long appForecastData = getForecastData(appConsumptionRate,
dayOfMonth, dayOfWeek, time, appTotalData);
String appForecastDataStr = CommonFunctions
.humanReadableByteCount(appForecastData, false);
modelSetter.setForecastData(appForecastDataStr);
arrFinal.add(modelSetter);
} catch (Exception e) {
e.getMessage();
}
}
} else {
ListModel modelSetter = new ListModel();
modelSetter.setAppName("No Data");
modelSetter.setConsumptionRate("0.0 KB");
modelSetter.setForecastData("0.0 KB");
modelSetter.setNetworkData("0.0 KB");
modelSetter.setTodaysData("0.0 KB");
modelSetter.setTotalData("0.0 KB");
arrFinal.add(modelSetter);
}
Collections.sort(arrFinal, new Comparator<ListModel>() {
#Override
public int compare(ListModel lhs, ListModel rhs) {
// TODO Auto-generated method stub
return lhs.getDataConsumed() > rhs.getDataConsumed() ? -1
: lhs.getDataConsumed() < rhs.getDataConsumed() ? 1
: 0;
}
});
adap = new CustomAdapter(getActivity(), arrFinal, res, networkType);
adap.notifyDataSetChanged();
return adap;
}
public void setListViewData(View view) {
try {
ListAdapter adap = getData();
ActionSlideExpandableListView list = (ActionSlideExpandableListView) view
.findViewById(R.id.list);
list.setAdapter(adap);
list.setSmoothScrollbarEnabled(true);
// listen for events in the two buttons for every list item.
// the 'position' var will tell which list item is clicked
} catch (Exception e) {
e.getMessage();
}
}
private long getTotalDataPerApp(String packageName) {
String[] arr = CommonFunctions.getDateAccordingToDuration(filterFlag);
String sDate = arr[0];
String eDate = arr[1];
long data = dbHelper.getDailyTotalDataPerApp(sDate, eDate, packageName);
return data;
}
private long getDailyNetworkDataPerApp(String networkType,
String packageName) {
String[] arr = CommonFunctions.getDateAccordingToDuration(filterFlag);
String sDate = arr[0];
String eDate = arr[1];
long data = dbHelper.getDailyNetworkDataPerApp(sDate, eDate,
networkType, packageName);
return data;
}
private long getUsageData(String packageName) {
String[] arr = CommonFunctions.getDateAccordingToDuration(filterFlag);
String sDate = arr[0];
String eDate = arr[1];
long data = dbHelper.getDailyTotalDataPerApp(sDate, eDate, packageName);
return data;
}
private long getForecastData(long cRate, long dayOfMonth, long dayOfWeek,
long time, long appTotalData) {
long output = 0;
if (filterFlag.equalsIgnoreCase("0")) {
output = (cRate * (24 - time)) + appTotalData;
} else if (filterFlag.equalsIgnoreCase("1")) {
long leftDaysOfWeek = 7 - dayOfWeek;
output = (cRate * leftDaysOfWeek) + appTotalData;
} else if (filterFlag.equalsIgnoreCase("2")) {
long leftDaysOfMonth = 31 - dayOfMonth;
output = (cRate * leftDaysOfMonth) + appTotalData;
}
return output;
}
private long getConsumptionRate(Calendar cal, long totalData) {
long output = 0;
int dayOfWeek = cal.get(Calendar.DAY_OF_WEEK);
int dayOfMonth = cal.get(Calendar.DAY_OF_MONTH);
int time = cal.get(Calendar.HOUR_OF_DAY);
if (filterFlag.equalsIgnoreCase("0")) {
output = totalData / time;
} else if (filterFlag.equalsIgnoreCase("1")) {
output = totalData / dayOfWeek;
} else if (filterFlag.equalsIgnoreCase("2")) {
output = totalData / dayOfMonth;
}
return output;
}
public ListAdapter buildDummyData() {
final int SIZE = 20;
String[] values = new String[SIZE];
for (int i = 0; i < SIZE; i++) {
values[i] = "Item " + i;
}
return new ArrayAdapter<String>(getActivity(),
R.layout.expandable_list_item, R.id.tvAppName, values);
}
}
Crash Log
11-19 21:33:24.010 12557-12557/com.oda.bandwit E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.oda.bandwit, PID: 12557
android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application
at android.view.ViewRootImpl.setView(ViewRootImpl.java:682)
at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:342)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:93)
at android.app.Dialog.show(Dialog.java:316)
at android.app.AlertDialog$Builder.show(AlertDialog.java:1112)
at com.oda.bandwit.TcpDumpService.startTCPdump(TcpDumpService.java:98)
at com.oda.bandwit.TcpDumpService.access$000(TcpDumpService.java:22)
at com.oda.bandwit.TcpDumpService$1.run(TcpDumpService.java:62)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6077)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
So I have a FragmentActivity thats working perfectly as it stands.
public class ChallongeEvent extends FragmentActivity {
private TextView tab_text;
private String EVENT_ID, URL;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.challonge_act_event);
init();
}
private void init() {
tab_text = (TextView) findViewById(R.id.tab_text);
Intent intent = getIntent();
EVENT_ID = intent.getStringExtra("event_id");
URL = "https://api.challonge.com/v1/tournaments/" + EVENT_ID + ".json";
String titles[] = new String[] { getString(R.string.details), getString(R.string.players) };
int numTabs = titles.length;
EventAdapter adapter = new EventAdapter(getSupportFragmentManager(), titles, numTabs);
ViewPager pager = (ViewPager) findViewById(R.id.pager);
pager.setAdapter(adapter);
pager.setCurrentItem(numTabs - 1);
SlidingTabLayout sliding_tabs = (SlidingTabLayout) findViewById(R.id.sliding_tabs);
sliding_tabs.setDistributeEvenly(true);
sliding_tabs.setViewPager(pager);
}
#Override
public void onResume() {
super.onResume();
populate();
}
private void populate() {
AsyncGet fetch = new AsyncGet(new AsyncResponse() {
#Override
public void processFinish(String output) {
for (Fragment fragment : getSupportFragmentManager().getFragments())
{
if (fragment instanceof ChallongePlayers) {
((ChallongePlayers) fragment).parsePlayers(output);
} else if (fragment instanceof ChallongeMatches) {
((ChallongeMatches) fragment).parseMatches(output);
}
}
}
});
HttpUrl.Builder urlBuilder = HttpUrl.parse(URL).newBuilder();
urlBuilder.addQueryParameter("api_key", Challonge.API_KEY);
urlBuilder.addQueryParameter("include_participants", "1");
urlBuilder.addQueryParameter("include_matches", "1");
fetch.execute(urlBuilder.build().toString());
}
}
When the FragmentActivity launches, it fetches JSON from an API, then sends the data of this API to several Fragments within the pager. It does this with the following code:
AsyncGet fetch = new AsyncGet(new AsyncResponse() {
#Override
public void processFinish(String output) {
for (Fragment fragment : getSupportFragmentManager().getFragments())
{
if (fragment instanceof ChallongePlayers) {
((ChallongePlayers) fragment).parsePlayers(output);
} else if (fragment instanceof ChallongeMatches) {
((ChallongeMatches) fragment).parseMatches(output);
}
}
}
});
HttpUrl.Builder urlBuilder = HttpUrl.parse(URL).newBuilder();
urlBuilder.addQueryParameter("api_key", Challonge.API_KEY);
urlBuilder.addQueryParameter("include_participants", "1");
urlBuilder.addQueryParameter("include_matches", "1");
fetch.execute(urlBuilder.build().toString());
However, each of these Fragments has a SwipeRefreshLayout within it, that I would like to activate .setRefreshing(true) on before the AsyncTask request. So I made the SwipeRefreshLayout on each of those fragments as public and I tried to add the following above the AsyncGet fetch = ... line:
for (Fragment fragment : getSupportFragmentManager().getFragments())
{
if (fragment instanceof ChallongePlayers) {
((ChallongePlayers) fragment).swipe_container.setRefreshing(true);
} else if (fragment instanceof ChallongeMatches) {
((ChallongeMatches) fragment).swipe_container.setRefreshing(true);
}
}
Unfortunately, the first line of this code produces an error:
java.lang.NullPointerException: Attempt to invoke interface method 'java.util.Iterator java.util.List.iterator()' on a null object reference
Why doesn't this work?
The collection returned by the getFragments() call has not been initialized yet and is null.
You can add an if check to make sure getFragments() does not return a null collection before iterating over it:
if(getSupportFragmentManager().getFragments() != null) {
for (Fragment fragment : getSupportFragmentManager().getFragments())
{
if (fragment instanceof ChallongePlayers) {
((ChallongePlayers) fragment).swipe_container.setRefreshing(true);
} else if (fragment instanceof ChallongeMatches) {
((ChallongeMatches) fragment).swipe_container.setRefreshing(true);
}
}
}
The below code is downloading images from a database showing into an sdcard. When previewing it was showing images. The first image showed perfectly, but from next image onwards it was showing like blank and loading images from the sdcard, but from sdcard it was not downloading image directly displaying images.
java
public class ImageGallery extends Activity {
Bundle bundle;
String catid, temp, responseJson;
JSONObject json;
ImageView imageViewPager;
// for parsing
JSONObject o1, o2;
JSONArray a1, a2;
int k;
Boolean toggleTopBar;
ArrayList<String> imageThumbnails;
ArrayList<String> imageFull;
public static int imagePosition=0;
SubsamplingScaleImageView imageView, imageViewPreview, fullImage ;
ImageView thumb1, back;
private LinearLayout thumb2;
RelativeLayout topLayout, stripeView;
RelativeLayout thumbnailButtons;
FrameLayout gridFrame;
public ImageLoader imageLoader;
//SharedPreferences data
SharedPreferences s1;
SharedPreferences.Editor editor;
int swipeCounter;
ParsingForFinalImages parsingObject;
int position_grid;
SharedPreferences p;
Bitmap bm;
int numOfImagesInsidee;
LinearLayout backLinLayout;
public static boolean isThumb2=false;
public static boolean isThumb1=false;
public static ViewPager viewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_image_gallery);
//isThumb2=false;
toggleTopBar = false;
//position_grid=getIntent().getExtras().getInt("position");
thumbnailButtons = (RelativeLayout)findViewById(R.id.thumbnailButtons);
topLayout = (RelativeLayout)findViewById(R.id.topLayout);
//fullImage = (SubsamplingScaleImageView)findViewById(R.id.fullimage);
backLinLayout = (LinearLayout)findViewById(R.id.lin_back);
backLinLayout.setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent io = new Intent(getBaseContext(), MainActivity.class);
// clear the previous activity and start a new task
// System.gc();
// io.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(io);
finish();
}
});
ConnectionDetector cd = new ConnectionDetector(getBaseContext());
Boolean isInternetPresent = cd.isConnectingToInternet();
thumb1 = (ImageView)findViewById(R.id.thumb1);
thumb2 = (LinearLayout)findViewById(R.id.thumb2);
stripeView = (RelativeLayout)findViewById(R.id.stripeView) ;
gridFrame = (FrameLayout)findViewById(R.id.gridFrame);
thumb1.setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View view) {
stripeView.setVisibility(View.GONE);
gridFrame.setVisibility(View.VISIBLE);
viewPager.setVisibility(View.GONE);
//fullImage.setVisibility(View.GONE);
thumb1.setClickable(false);
isThumb1=true;
isThumb2=false;
Log.i("Thumb Position 1",""+ImageGallery.imagePosition);
viewPager.removeAllViews();
Fragment newFragment = new GridFragment2();
FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.replace(R.id.gridFrame, newFragment).commit();
}
});
thumb2.setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View view) {
// stripeView.setVisibility(View.VISIBLE);
stripeView.setVisibility(View.GONE);
gridFrame.setVisibility(View.VISIBLE);
viewPager.setVisibility(View.GONE);
// fullImage.setVisibility(View.GONE);
thumb1.setClickable(true);
isThumb2=true;
isThumb1=false;
Log.i("Thumb Position 2",""+ImageGallery.imagePosition);
viewPager.removeAllViews();
Fragment newFragment = new ImageStripeFragment();
FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.replace(R.id.gridFrame, newFragment).commit();
}
});
// allow networking on main thread
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
/*bundle = getIntent().getExtras();
catid = bundle.getString("catid");*/
// Toast.makeText(getBaseContext(), catid, Toast.LENGTH_LONG).show();
// making json using the catalogue id we got
p = getSharedPreferences("gridData", Context.MODE_APPEND);
catid = p.getString("SelectedCatalogueIdFromGrid1", "");
int clickedListPos = p.getInt("clickedPosition", 0);
imageViewPreview = (SubsamplingScaleImageView)findViewById(R.id.preview);
imageThumbnails = new ArrayList<String>();
imageFull = new ArrayList<String>();
s1 = this.getSharedPreferences("data", Context.MODE_APPEND);
editor = s1.edit();
Log.d("catidfnl", catid);
numOfImagesInsidee = p.getInt("numberOfItemsSelectedFromGrid1", 0);
Log.d("blingbling2", String.valueOf(numOfImagesInsidee));
// adding downloaded images to arraylist
for(int m=0;m<numOfImagesInsidee;m++){
imageThumbnails.add(Environment.getExternalStorageDirectory()+"/"+"thumbImage" + catid + m+".png");
imageFull.add(Environment.getExternalStorageDirectory()+"/"+"fullImage" + catid + m+".png");
// imageFull.add("file://" + Environment.getExternalStorageDirectory() + "/" + "fullImage32.png");
}
viewPager = (ViewPager) findViewById(R.id.pager);
ImagePagerAdapter adapter = new ImagePagerAdapter();
viewPager.setAdapter(adapter);
SubsamplingScaleImageView fullImage = new SubsamplingScaleImageView(ImageGallery.this);
// code to display image in a horizontal strip starts here
LinearLayout layout = (LinearLayout) findViewById(R.id.linear);
for (int i = 0; i < imageThumbnails.size(); i++) {
imageView = new SubsamplingScaleImageView(this);
imageView.setId(i);
imageView.setPadding(2, 2, 2, 2);
// Picasso.with(this).load("file://"+imageThumbnails.get(i)).into(imageView);
// imageView.setScaleType(ImageView.ScaleType.FIT_XY);
layout.addView(imageView);
ViewGroup.LayoutParams params = imageView.getLayoutParams();
params.width = 200;
params.height = 200;
imageView.setLayoutParams(params);
imageView.setZoomEnabled(false);
imageView.setDoubleTapZoomScale(0);
imageView.setImage(ImageSource.uri(imageThumbnails.get(0)));
imageView.setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View view) {
imageView.setZoomEnabled(false);
imageViewPreview.setImage(ImageSource.uri(imageFull.get(view.getId())));
imageView.recycle();
imageViewPreview.recycle();
}
});
}
// code to display image in a horizontal strip ends here
imageViewPreview.setZoomEnabled(false);
/*imageViewPreview.setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View view) {
imageViewPreview.setZoomEnabled(false);
stripeView.setVisibility(View.GONE);
gridFrame.setVisibility(View.GONE);
viewPager.setVisibility(View.VISIBLE);
}
});*/
imageViewPreview.setOnClickListener(new DoubleClickListener() {
#Override
public void onSingleClick(View v) {
Log.d("yo click", "single");
}
#Override
public void onDoubleClick(View v) {
Log.d("yo click", "double");
}
});
}
public abstract class DoubleClickListener implements View.OnClickListener {
private static final long DOUBLE_CLICK_TIME_DELTA = 300;//milliseconds
long lastClickTime = 0;
#Override
public void onClick(View v) {
long clickTime = System.currentTimeMillis();
if (clickTime - lastClickTime < DOUBLE_CLICK_TIME_DELTA){
onDoubleClick(v);
} else {
onSingleClick(v);
}
lastClickTime = clickTime;
}
public abstract void onSingleClick(View v);
public abstract void onDoubleClick(View v);
}
// #Override
// public void onBackPressed() {
// Intent io = new Intent(getBaseContext(), MainActivity.class);
// // clear the previous activity and start a new task
// super.onBackPressed();
// finish();
// // System.gc();
// // io.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
// startActivity(io);
// }
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_image_gallery, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
private class ImagePagerAdapter extends PagerAdapter {
/* private int[] mImages = new int[] {
R.drawable.scroll3,
R.drawable.scroll1,
R.drawable.scroll2,
R.drawable.scroll4
};*/
/* private String[] description=new String[]
{
"One","two","three","four"
};
*/
#Override
public int getCount() {
Log.i("Image List Size", "" + imageFull.size());
return imageFull.size();
}
#Override
public boolean isViewFromObject(View view, Object object) {
return view == ((SubsamplingScaleImageView) object);
}
#Override
public Object instantiateItem(ViewGroup container, int position) {
Context context = ImageGallery.this;
// ImageLoader loader = new ImageLoader(context, 1);
// loader.DisplayImage(ImageSource.uri(imageFull.get(imagePosition)),imageView,imagePosition,new ProgressDialog(context));
SubsamplingScaleImageView fullImage = new SubsamplingScaleImageView(ImageGallery.this);
// for placeholder
// fullImage.setImage(ImageSource.resource(R.drawable.tan2x));
if(!GridFragment2.isSelectedGrid2&&!ImageStripeFragment.isImageStripe) {
imagePosition = position;
fullImage.setImage(ImageSource.uri(imageFull.get(imagePosition)));
}
/* else if(!ImageStripeFragment.isImageStripe)
{
imagePosition = position;
fullImage.setImage(ImageSource.uri(imageFull.get(imagePosition)));
}
else if(ImageStripeFragment.isImageStripe)
{
position=imagePosition;
viewPager.setCurrentItem(imagePosition);
fullImage.setImage(ImageSource.uri(imageFull.get(position)));
}*/
else
{
position=imagePosition;
viewPager.setCurrentItem(imagePosition);
fullImage.setImage(ImageSource.uri(imageFull.get(position)));
//viewPager.removeAllViews();
}
// ImageView imageViewPager = new ImageView(context);
// ImageView imageViewPager = new ImageView(getApplicationContext());
// SubsamplingScaleImageView fullImage = new SubsamplingScaleImageView(ImageGallery.this);
GridFragment2.isSelectedGrid2=false;
ImageStripeFragment.isImageStripe=false;
// Log.i("Image Resource", "" + ImageSource.uri(imageFull.get(position)));
// imageViewPager.setImageBitmap(BitmapFactory.decodeFile(imageFull.get(position)));
// imageViewPager.setImageBitmap(myBitmap);
// fullImage.setImage(ImageSource.bitmap(bmImg));
//imageView.setImageResource(Integer.parseInt(imageFull.get(position)));
/*int padding = context.getResources().getDimensionPixelSize(
R.dimen.padding_medium);
imageView.setPadding(padding, padding, padding, padding);*/
/*imageView.setScaleType(ImageView.ScaleType.CENTER);
imageView.setImageResource(Integer.parseInt(imageFull.get(position)));
if(position==3)
{
}*/
// Log.i("Image Position",""+position);
/*text.setText(description[position]);
Log.i("Text Position",""+position);*/
/*switch(position)
{
case 0:
String pos=String.valueOf(position);
text.setText(pos);
break;
case 1:
String pos1=String.valueOf(position);
text.setText(pos1);
break;
case 2:
String pos2=String.valueOf(position);
text.setText(pos2);
break;
case 3:
String pos3=String.valueOf(position);
text.setText(pos3);
break;
}*/
fullImage.setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View view) {
if (toggleTopBar == false) {
// thumbnailButtons.setVisibility(View.GONE);
thumbnailButtons.animate()
.translationY(-2000)
.setDuration(1000)
.start();
toggleTopBar = true;
} else if (toggleTopBar == true) {
// thumbnailButtons.setVisibility(View.VISIBLE);
thumbnailButtons.animate()
.translationY(0)
.setDuration(1000)
.start();
toggleTopBar = false;
}
}
});
((ViewPager) container).addView(fullImage, 0);
return fullImage;
}
#Override
public void destroyItem(ViewGroup container, int position, Object object) {
((ViewPager) container).removeView((SubsamplingScaleImageView) object);
}
/* #Override
public void destroyItem(View collection, int position, Object o) {
Log.d("DESTROY", "destroying view at position " + position);
View view = (View) o;
((ViewPager) collection).removeView(view);
view = null;
}*/
}
#Override
public void onBackPressed() {
// TODO Auto-generated method stub
super.onBackPressed();
Intent intent = new Intent(getApplicationContext(), MainActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
finish();
}
This will be the best approach for your Solution,Try using Universal Image Loader.
Features:
Multithread image loading (async or sync)
Wide customization of ImageLoader's configuration (thread executors, downloader, decoder, memory and disk cache, display image options, etc.)
Many customization options for every display image call (stub images, caching switch, decoding options, Bitmap processing and displaying, etc.)
Image caching in memory and/or on disk (device's file system or SD card)
Listening loading process (including downloading progress)
Find link here : https://github.com/nostra13/Android-Universal-Image-Loader
I have an adapter that extends FragmentPagerAdapter and takes advantage of the ICS style actionBar. This actionbar has actions that take input from the currently selected page.
Specifically, I have a screenshot icon in the actionbar that takes the url of the current page and displays any screenshots from that url. However, I dont know how to retrieve the currently selected page.
How can I implement something like a
public int getActivePage() {
return position;
Im still working on the viewpager implementation, so my code is still heavily reliant on examples, so disregard the mess :P
The problem areas are marked below.
public class ListFragmentViewPagerActivity extends FragmentActivity {
ArrayList<String> URLS;
ArrayList<String> TITLES;
BroadcastReceiver receiver;
String threadTitle = null;
public static String threadUrl = null;
String type = null;
String threadAuthor = null;
String ident = null;
boolean isFav = false;
String author = null;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.thread_view);
Bundle extras = getIntent().getExtras();
threadTitle = extras.getString("title");
threadUrl = extras.getString("url");
type = extras.getString("type");
ident = extras.getString("ident");
author = extras.getString("author");
try {
URLS = extras.getStringArrayList("urls");
TITLES = extras.getStringArrayList("titles");
} catch (Exception e) {
URLS = null;
}
final FDBAdapter db = new FDBAdapter(this);
db.open();
Cursor c = db.getAllFavs();
if (c.getCount()>0) {
if (c.getString(2).equals(threadTitle)) {
isFav = true;
}
try {
while (c.moveToNext()) {
Log.d("FAVS", c.getString(2));
if (c.getString(2).equals(threadTitle)) {
isFav = true;
}
}
} catch (Exception ep) {
ep.printStackTrace();
}
}
c.close();
db.close();
ViewPager pager = (ViewPager) findViewById(android.R.id.list);
pager.setAdapter(new ExamplePagerAdapter(getSupportFragmentManager()));
TitlePageIndicator indicator = (TitlePageIndicator)findViewById( R.id.indicator );
indicator.setViewPager(pager);
receiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (DownloadManager.ACTION_DOWNLOAD_COMPLETE.equals(action)) {
long downloadId = intent.getLongExtra(
DownloadManager.EXTRA_DOWNLOAD_ID, 0);
String ns = Context.NOTIFICATION_SERVICE;
NotificationManager mNotificationManager = (NotificationManager) context.getSystemService(ns);
int icon = R.drawable.ic_launcher; // icon from resources
CharSequence tickerText = "Download ready!"; // ticker-text
long when = System.currentTimeMillis(); // notification time
CharSequence contentTitle = "OMG"; // expanded message title
CharSequence contentText = "Your download is finished!"; // expanded message text
Intent notificationIntent = new Intent(context, ExampleListFragment.class);
PendingIntent contentIntent = PendingIntent.getActivity(context, 0, notificationIntent, 0);
Notification notification = new Notification(icon, tickerText, when);
notification.setLatestEventInfo(context, contentTitle, contentText, contentIntent);
notification.defaults |= Notification.DEFAULT_VIBRATE;
notification.flags |= Notification.FLAG_AUTO_CANCEL;
final int HELLO_ID = 1;
mNotificationManager.notify(HELLO_ID, notification);
}
}
};
registerReceiver(receiver, new IntentFilter(
DownloadManager.ACTION_DOWNLOAD_COMPLETE));
}
public class ExamplePagerAdapter extends FragmentPagerAdapter implements TitleProvider{
public ExamplePagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public int getCount() {
return URLS.size();
}
#Override
public Fragment getItem(int position) {
Fragment fragment = new ExampleListFragment();
// set arguments here, if required
Bundle args = new Bundle();
args.putString("url", URLS.get(position));
fragment.setArguments(args);
return fragment;
}
#Override
public String getTitle(int pos) {
return TITLES.get(pos);
}
}
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater menuinflate = new MenuInflater(this);
menuinflate.inflate(R.menu.thread_menu, menu);
if (type.equals("xda")) {
menu.removeItem(R.id.ss_view);
}
if (isFav) {
menu.getItem(2).setIcon(R.drawable.fav_ab);
}
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
Intent intent = new Intent(this, MainActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
break;
case R.id.ss_view:
Intent ssi = new Intent(this, SSActivity.class);
ssi.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
Bundle b = new Bundle();
//I need to get the position of the currently active page here so that I can retrieve the //corresponding values for the title and url.
b.putString("title", threadTitle);
b.putString("url", threadUrl);
ssi.putExtras(b);
startActivity(ssi);
break;
case R.id.restart:
break;
case R.id.fav_ab:
threadUrl = new String(threadUrl.replaceAll("http://", ""));
FDBAdapter fdb = new FDBAdapter(this);
fdb.open();
if (isFav) {
Cursor c = fdb.getAllUrls();
while (c.moveToNext()) {
String id = c.getString(c.getColumnIndex("_id"));
int rowId = Integer.parseInt(id);
if(c.getString(c.getColumnIndex("url")).equals(threadUrl)) {
if (fdb.deleteUrl(rowId)) {
Log.d("THREAD", "SUCCESS");
} else {
Log.d("THREAD", "FAILED");
}
}
}
c.close();
item.setIcon(R.drawable.fav_ab_off);
isFav = false;
} else {
fdb.insertFav(threadUrl, threadTitle, ident, type, author, "thread");
item.setIcon(R.drawable.fav_ab);
isFav = true;
}
fdb.close();
default:
return super.onOptionsItemSelected(item);
}
return false;
}
#Override
public void onStop() {
super.onStop();
unregisterReceiver(receiver);
}
#Override
public void onStart() {
super.onStart();
registerReceiver(receiver, new IntentFilter(
DownloadManager.ACTION_DOWNLOAD_COMPLETE));
}
}
Heres what I mean by the currently selected page.
I believe what you are looking for is onPageChangedListener(). This method belongs to the TitlePageIndicator. Something like...
indicator.setOnPageChangedListener(new OnPageChangedListener() {
// Implement unimplemented methods...
});
you can also ask to viewpager
in java
ViewPager pager = (ViewPager) findViewById(android.R.id.list);
pager.getCurrentItem()
in kotlin
pager.currentItem