AbstractTracker says Looper.prepare() is not called

AbstractTracker says Looper.prepare() is not called - java

I don't use anything related to threads, but the emulator keeps saying:
12-15 14:19:22.807 20983-21204/edu.fontys.stayconnected E/AbstractTracker: Can't create handler inside thread that has not called Looper.prepare()
It there a way to debug some more, so to see why this error happens?
MainActivity:
public class MainActivity extends AppCompatActivity {
private static final String TAG = "MainActivity";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final ViewPager viewPager = (ViewPager) findViewById(R.id.view_pager);
final OptionFragmentAdapter adapter = new OptionFragmentAdapter(getSupportFragmentManager());
if (viewPager != null) {
SlidingTabLayout slidingTabLayout = (SlidingTabLayout) findViewById(R.id.sliding_tab_layout);
slidingTabLayout.setCustomTabColorizer(new SlidingTabLayout.TabColorizer() {
#Override
public int getIndicatorColor(int position) {
return getResources().getColor(R.color.colorAccent);
}
});
slidingTabLayout.setDistributeEvenly(true);
viewPager.setAdapter(adapter);
slidingTabLayout.setViewPager(viewPager);
}
if (!NotificationManagerCompat.getEnabledListenerPackages(this).contains(getPackageName())) {
new AlertDialog.Builder(this)
.setTitle(getString(R.string.dialog_notification_title))
.setMessage(R.string.dialog_notification_message)
.setPositiveButton(R.string.dialog_notification_settings, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
startActivity(new Intent(Settings.ACTION_NOTIFICATION_LISTENER_SETTINGS));
}
})
.setNegativeButton(R.string.dialog_notification_close_app, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
finish();
}
})
.show();
}
}
}
OptionFragmentAdapter:
public class OptionFragmentAdapter extends FragmentStatePagerAdapter {
private static final String TAG = "OptionFragmentAdapter";
private String[] titles = new String[] { "Lamps", "Apps", "Profile" };
public OptionFragmentAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
Log.d(TAG, String.format("Current position: %d", position));
Fragment fragment = null;
if (position == 0) {
fragment = new LampsFragment();
} else if (position == 1) {
fragment = new AppsFragment();
} else if (position == 2) {
fragment = new ProfileFragment();
} else {
Log.w(TAG, "There is no fragment found for this position");
}
return fragment;
}
#Override
public CharSequence getPageTitle(int position) {
return titles[position];
}
#Override
public int getCount() {
return titles.length;
}
}
The slidingTabLayout is from google: https://github.com/google/iosched/blob/master/android/src/main/java/com/google/samples/apps/iosched/ui/widget/SlidingTabLayout.java

Related

How to show dynamic items in one row of RecyclerView? When the row clicked shows all items again

I know how to add items to RecyclerView and show them, but let's say I add some dynamic items to the RecyclerView like this image
Here After click save button, it creates three rows in the RecyclerView like below image, which I don't want it creates three rows.
Instead I want to create one row, and when I clicked in that row then shows the three items like this image.
AddChecklist class
public class AddChecklist extends AppCompatActivity {
Button btnAddItem;
public LinearLayout linearLayout;
DbHelper dbHelper;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_checklist);
dbHelper = new DbHelper(this);
btnAddItem.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
addView();
}
});
}
public void addView(){
View checklistView = getLayoutInflater().inflate(R.layout.checklist_view, null, false);
EditText etChecklistItem = checklistView.findViewById(R.id.et_checklist_item);
CheckBox checkBox = checklistView.findViewById(R.id.check_box);
linearLayout.addView(checklistView);
ImageView imgDelete = checklistView.findViewById(R.id.img_delete);
imgDelete.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
removeView(checklistView);
}
});
}
public void removeView(View view){
linearLayout.removeView(view);
}
#Override
public boolean onOptionsItemSelected(#NonNull MenuItem item) {
DbHelper dbHelper = new DbHelper(getApplicationContext());
switch (item.getItemId()) {
case R.id.btn_save:
ChecklistHelper checklistHelper = new ChecklistHelper();
for (int i = 0; i < linearLayout.getChildCount(); i++) {
View v = linearLayout.getChildAt(i);
EditText etChecklistItem = v.findViewById(R.id.et_checklist_item);
CheckBox checkBox = v.findViewById(R.id.check_box);
if (checkBox.isChecked()) {
checklistHelper.setStatus("1");
}
else
checklistHelper.setStatus("0");
dbHelper.insertChecklist(checklistHelper.getStatus(), etChecklistItem.getText().toString(), DateTime.date(), DateTime.time(), System.currentTimeMillis());
}
finish();
break;
}
return true;
}
}
Adapter class
public class ChecklistItems extends AppCompatActivity {
Toolbar toolbar;
RecyclerView recyclerView;
String content;
String status;
boolean isEditChecklist = false;
private ChecklistAdapter checklistAdapter;
DbHelper dbHelper;
List<ChecklistHelper> checks;
int id;
ChecklistHelper checklistHelper;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_checklist_items);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
checklistHelper = new ChecklistHelper();
dbHelper = new DbHelper(this);
checks = dbHelper.getChecklists();
checklistAdapter = new ChecklistAdapter(checks);
recyclerView.setAdapter(checklistAdapter);
}
public class ChecklistAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private boolean isEnableDelete = false;
List<ChecklistHelper> checkList;
public ChecklistAdapter(List<ChecklistHelper> checkList) {
this.checkList = checkList;
}
#NonNull
#Override
public RecyclerView.ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
LayoutInflater layoutInflater = LayoutInflater.from(parent.getContext());
View view = layoutInflater.inflate(R.layout.checklist_layout_child, parent, false);
return new ChecklistChildViewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull RecyclerView.ViewHolder holder, int position) {
ChecklistChildViewHolder checklistChildViewHolder = (ChecklistChildViewHolder) holder;
checklistChildViewHolder.updateVisibility(isEnableDelete);
checklistChildViewHolder.checkBox.setText(checkList.get(position).getContent());
checklistChildViewHolder.checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
String txt = checklistChildViewHolder.checkBox.getText().toString();
if (b)
checklistChildViewHolder.checkBox.setText(lineThrough(txt));
else
checklistChildViewHolder.checkBox.setText(txt);
}
});
checklistChildViewHolder.delete.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
dbHelper.deleteChecklist(id);
finish();
}
});
}
#Override
public int getItemCount() {
return checkList.size();
}
public void updateItems(boolean isEnableDelete){
this.isEnableDelete = isEnableDelete;
notifyDataSetChanged();
}
public class ChecklistChildViewHolder extends RecyclerView.ViewHolder {
CheckBox checkBox;
ImageView delete, edit;
ChecklistChildViewHolder(#NonNull View itemView) {
super(itemView);
checkBox = itemView.findViewById(R.id.checkbox_child);
delete = itemView.findViewById(R.id.delete_child);
edit = itemView.findViewById(R.id.edit_child);
delete.setVisibility(View.INVISIBLE);
edit.setVisibility(View.INVISIBLE);
}
public void updateVisibility(boolean isEnableDelete){
if (isEnableDelete) {
delete.setVisibility(View.VISIBLE);
edit.setVisibility(View.VISIBLE);
}
else {
delete.setVisibility(View.INVISIBLE);
edit.setVisibility(View.INVISIBLE);
}
}
}
}
#Override
public boolean onOptionsItemSelected(#NonNull MenuItem item) {
DbHelper dbHelper = new DbHelper(this);
// long id = getIntent().getIntExtra("id", 0);
switch (item.getItemId()) {
case R.id.edit:
isEditChecklist = true;
checklistAdapter.updateItems(true);
invalidateOptionsMenu();
break;
case R.id.save:
Toast.makeText(getApplicationContext(), "saved ", Toast.LENGTH_SHORT).show();
checklistAdapter.updateItems(false);
isEditChecklist = false;
finish();
break;
case R.id.delete:
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Delete Checklist");
builder.setMessage("Are you sure?");
builder.setPositiveButton("Continue ", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
dbHelper.deleteChecklist(id);
// checklistAdapter.notifyDataSetChanged();
Toast.makeText(getApplicationContext(), "checklist deleted", Toast.LENGTH_SHORT).show();
finish();
}
});
builder.setNegativeButton("Cancel ", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
finish();
}
}).create().show();
break;
}
return true;
}
}

Have some hard-coded value in RoomDatabase that won't disappear after uninstalling

building an Android App using Room DB. I've uninstalled the app various times but always seem to get the same entry as i re-install it.
I can't seem to reach the onCreate part of the RoomDatabase.Callback as I'm trying to add some dummy entries and log some info to the logs.
public class MainActivity extends AppCompatActivity {
private ContactsAdapter contactsAdapter;
private ArrayList<Contact> contactArrayList = new ArrayList<>();
private RecyclerView recyclerView;
private ContactsAppDatabase contactsAppDatabase;
private static final String TAG="MainActivityTag";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setTitle(" Contacts Manager ");
recyclerView = findViewById(R.id.recycler_view_contacts);
contactsAppDatabase= Room.databaseBuilder(getApplicationContext(),ContactsAppDatabase.class,"ContactDB")
.addCallback(callback)
.build();
new GetAllContactsAsyncTask().execute();
contactsAdapter = new ContactsAdapter(this, contactArrayList, MainActivity.this);
RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(getApplicationContext());
recyclerView.setLayoutManager(mLayoutManager);
recyclerView.setItemAnimator(new DefaultItemAnimator());
recyclerView.setAdapter(contactsAdapter);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
addAndEditContacts(false, null, -1);
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
public void addAndEditContacts(final boolean isUpdate, final Contact contact, final int position) {
LayoutInflater layoutInflaterAndroid = LayoutInflater.from(getApplicationContext());
View view = layoutInflaterAndroid.inflate(R.layout.layout_add_contact, null);
AlertDialog.Builder alertDialogBuilderUserInput = new AlertDialog.Builder(MainActivity.this);
alertDialogBuilderUserInput.setView(view);
TextView contactTitle = view.findViewById(R.id.new_contact_title);
final EditText newContact = view.findViewById(R.id.name);
final EditText contactEmail = view.findViewById(R.id.email);
contactTitle.setText(!isUpdate ? "Add New Contact" : "Edit Contact");
if (isUpdate && contact != null) {
newContact.setText(contact.getName());
contactEmail.setText(contact.getEmail());
}
alertDialogBuilderUserInput
.setCancelable(false)
.setPositiveButton(isUpdate ? "Update" : "Save", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialogBox, int id) {
}
})
.setNegativeButton("Delete",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialogBox, int id) {
if (isUpdate) {
deleteContact(contact, position);
} else {
dialogBox.cancel();
}
}
});
final AlertDialog alertDialog = alertDialogBuilderUserInput.create();
alertDialog.show();
alertDialog.getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (TextUtils.isEmpty(newContact.getText().toString())) {
Toast.makeText(MainActivity.this, "Enter contact name!", Toast.LENGTH_SHORT).show();
return;
} else {
alertDialog.dismiss();
}
if (isUpdate && contact != null) {
updateContact(newContact.getText().toString(), contactEmail.getText().toString(), position);
} else {
createContact(newContact.getText().toString(), contactEmail.getText().toString());
}
}
});
}
private void deleteContact(Contact contact, int position) {
contactArrayList.remove(position);
new DeleteContactAsyncTask().execute(contact);
}
private void updateContact(String name, String email, int position) {
Contact contact = contactArrayList.get(position);
contact.setName(name);
contact.setEmail(email);
new UpdateContactAsyncTask().execute(contact);
contactArrayList.set(position, contact);
}
private void createContact(String name, String email) {
new CreateContactAsyncTask().execute(new Contact(0,name,email));
}
private class GetAllContactsAsyncTask extends AsyncTask<Void,Void,Void>{
#Override
protected Void doInBackground(Void... voids) {
contactArrayList.addAll(contactsAppDatabase.getContactDAO().getContacts());
return null;
}
#Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
contactsAdapter.notifyDataSetChanged();
}
}
private class CreateContactAsyncTask extends AsyncTask<Contact,Void,Void>{
#Override
protected Void doInBackground(Contact... contacts) {
long id = contactsAppDatabase.getContactDAO().addContact(contacts[0]);
Contact contact = contactsAppDatabase.getContactDAO().getContact(id);
if (contact != null) {
contactArrayList.add(0, contact);
}
return null;
}
#Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
contactsAdapter.notifyDataSetChanged();
}
}
private class UpdateContactAsyncTask extends AsyncTask<Contact,Void,Void>{
#Override
protected Void doInBackground(Contact... contacts) {
contactsAppDatabase.getContactDAO().updateContact(contacts[0]);
return null;
}
#Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
contactsAdapter.notifyDataSetChanged();
}
}
private class DeleteContactAsyncTask extends AsyncTask<Contact,Void,Void>{
#Override
protected Void doInBackground(Contact... contacts) {
contactsAppDatabase.getContactDAO().deleteContact(contacts[0]);
return null;
}
#Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
contactsAdapter.notifyDataSetChanged();
}
}
RoomDatabase.Callback callback = new RoomDatabase.Callback() {
#Override
public void onCreate(#NonNull SupportSQLiteDatabase db) {
super.onCreate(db);
//Toast.makeText(getApplicationContext()," On Create Called ",Toast.LENGTH_LONG).show();
Log.i(TAG, " on create invoked ");
createContact("name 1","email 1");
createContact("name 2","email 2");
createContact("name 3","email 3");
}
#Override
public void onOpen(#NonNull SupportSQLiteDatabase db) {
super.onOpen(db);
// Toast.makeText(getApplicationContext()," On Create Called ",Toast.LENGTH_LONG).show();
Log.i(TAG, " on open invoked ");
}
};
}
I've added write/ read external storage in the manifest unsure if thats important.
Things is onOpen gets invoked from within the callback so it seems a little weird.
github repo
when I install the app onanother device it works fine. obviously on the other (the first) device I still get the error even after deleting and reinstalling the app.
Please help.

Bluetooth beacon Scanning using android beacon library

I have a problem every time i open an activity (blueToothSearch.java) the following error occurs in my logcat.
12-04 18:57:52.317 5354-5354/com.example.admin.paniccenter E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.admin.paniccenter, PID: 5354
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.admin.paniccenter/com.example.admin.paniccenter.blueToothSearch}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.Context android.content.Context.getApplicationContext()' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2327)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.Context android.content.Context.getApplicationContext()' on a null object reference
at org.altbeacon.beacon.BeaconManager.<init>(BeaconManager.java:323)
at org.altbeacon.beacon.BeaconManager.getInstanceForApplication(BeaconManager.java:315)
at com.example.admin.paniccenter.blueToothSearch.<init>(blueToothSearch.java:65)
at java.lang.Class.newInstance(Native Method)
at android.app.Instrumentation.newActivity(Instrumentation.java:1067)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2317)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) 
at android.app.ActivityThread.-wrap11(ActivityThread.java) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:148) 
at android.app.ActivityThread.main(ActivityThread.java:5417) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Below is my blueToothSearch activity which i want to use to display a list of beacons in my region.
public class blueToothSearch extends AppCompatActivity implements BeaconConsumer {
private static final String TAG = "blueToothSearch";
private ViewPagerAdapter viewadapter;
private ViewPager myViewPager;
private TabLayout tabLayout;
public Toolbar toolbar;
//public static Handler UIHandler;
private static final int REQUEST_ENABLE_BT = 1234;
//public static final String EXTRAS_TARGET_ACTIVITY = "extrasTargetActivity";
//private static final String JAALEE_BEACON_PROXIMITY_UUID = "EBEFD083-70A2-47C8-9837-E7B5634DF524";//Jaalee BEACON Default UUID
// private static final Region ALL_BEACONS_REGION = new Region("rid", null, null, null);
//public static final String EXTRAS_BEACON = "extrasBeacon";
public BeaconManager beaconManager = BeaconManager.getInstanceForApplication(getBaseContext());
private ArrayList<Beacon> arrayL = new ArrayList<Beacon>();
private BeaconServiceUtility beaconUtill = null;
private BeaconAdapter adapterr;
public ListView list;
private LayoutInflater inflater;
#Override
protected void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_navigation);
viewadapter = new ViewPagerAdapter(getSupportFragmentManager());
toolbar = (Toolbar)findViewById(R.id.toolbar);
toolbar.setTitle("Bluetooth Devices");
//Set up the View Pager with the View page adapter
myViewPager = (ViewPager)findViewById(R.id.viewpager);
tabLayout = (TabLayout)findViewById(R.id.tabs);
tabLayout.setupWithViewPager(myViewPager);
//tabLayout.setVisibility(View.GONE);
final FloatingActionButton fab = (FloatingActionButton)findViewById(R.id.fab);
fab.setImageResource(R.drawable.ic_popup_sync_24);
setupViewPager(myViewPager);
setSupportActionBar(toolbar);
//viewPager.setAdapter(adapter);
myViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
#Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
#Override
public void onPageSelected(int position) {
switch (position){
case 0: fab.show();
break;
case 1: fab.hide();
break;
}
}
#Override
public void onPageScrollStateChanged(int state) {
}
});
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setDisplayShowHomeEnabled(true);
//getSupportActionBar().setDisplayShowHomeEnabled(true);
final DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
toolbar.setNavigationOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
finish();
drawer.closeDrawer(Gravity.LEFT);
}
});
adapterr = new BeaconAdapter();
list = findViewById(R.id.beaconlist);
list.setAdapter(adapterr);
//list.setOnItemClickListener(createOnItemClickListener());
inflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
private void setupViewPager(ViewPager viewPager){
ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager());
adapter.addFragment(new blueToothSearch.bluetooth(), "Available Devices");
adapter.addFragment(new bluetoothProperties(), "Device Properties");
viewPager.setAdapter(adapter);
}
#Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if(requestCode == REQUEST_ENABLE_BT){
if (resultCode == Activity.RESULT_OK){
connectToService();
}else {
Toast.makeText(this, "Bluetooth not enabled", Toast.LENGTH_LONG).show();
getSupportActionBar().setSubtitle("Bluetooth not enabled");
}
}
super.onActivityResult(requestCode, resultCode, data);
}
private void connectToService(){
try {
beaconManager.startRangingBeaconsInRegion(new Region("myRangingUniqueId", null, null, null));
}catch (RemoteException e){
e.printStackTrace();
}
try {
beaconManager.startMonitoringBeaconsInRegion(new Region("myMonitoringUniqueId", null, null, null));
}catch (RemoteException e){
e.printStackTrace();
}
}
/**
private AdapterView.OnItemClickListener createOnItemClickListener(){
return new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int pos, long l) {
if (getIntent().getStringExtra(EXTRAS_TARGET_ACTIVITY) != null){
try {
Class<?> clazz = Class.forName(getIntent().getStringExtra(EXTRAS_TARGET_ACTIVITY));
Intent intent = new Intent(blueToothSearch.this, clazz );
Beacon temp = adapterr.getItem(pos);
intent.putExtra(EXTRAS_BEACON, temp);
if(getIntent().getStringExtra(EXTRAS_TARGET_ACTIVITY).contains("com.example.admin.paniccenter.CharacteristicsDemoActivity"))
{
startActivity(intent);
// if (temp.getProximityUUID().equalsIgnoreCase(JAALEE_BEACON_PROXIMITY_UUID)) {
// startActivity(intent);
// }
// else
// {
// ListBeaconsActivity.this.runOnUiThread(new Runnable()
//{
// public void run()
// {
//Toast.makeText(ListBeaconsActivity.this, "Current Beacon is in Non-Connectable mode", Toast.LENGTH_LONG).show();
// }
// });
// }
}
else
{
startActivity(intent);
}
}catch (ClassNotFoundException e){
Log.e(TAG, "Finding class by name failed", e);
}
}
}
};
}
*/
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.scan_menu, menu);
MenuItem refreshItem = menu.findItem(R.id.refresh);
refreshItem.setActionView(R.layout.actionbar_indeterminate_progress);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == android.R.id.home) {
finish();
return true;
}
return super.onOptionsItemSelected(item);
}
#Override
public void onStart() {
super.onStart();
beaconUtill.onStart(beaconManager, this);
}
#Override
public void onStop() {
beaconUtill.onStop(beaconManager, this);
super.onStop();
}
#Override
public void onDestroy() {
super.onDestroy();
}
#Override
public void onBeaconServiceConnect() {
getSupportActionBar().setSubtitle("Scanning...");
Toast.makeText(this, "Scanning for devices", Toast.LENGTH_LONG).show();
beaconManager.setRangeNotifier(new RangeNotifier() {
#Override
public void didRangeBeaconsInRegion(Collection<Beacon> beacons, Region region) {
arrayL.clear();
arrayL.addAll((ArrayList<Beacon>) beacons);
adapterr.notifyDataSetChanged();
}
});
beaconManager.setMonitorNotifier(new MonitorNotifier() {
#Override
public void didEnterRegion(Region region) {
Log.e("BeaconDetactorService", "didEnterRegion");
}
#Override
public void didExitRegion(Region region) {
Log.e("BeaconDetactorService", "didExitRegion");
}
#Override
public void didDetermineStateForRegion(int i, Region region) {
Log.e("BeaconDetactorService", "didDetermineStateForRegion");
}
});
connectToService();
}
public static class bluetooth extends Fragment {
private static final String TAG = "bluetooth";
private int position;
private TextView textv;
private ViewPagerAdapter viewadapter;
private ViewPager myViewPager;
private TabLayout tabLayout;
private FragmentActivity myContext;
#Override
public void onAttach(Context context) {
super.onAttach(context);
//hideAction = (HideActionBar)getContext();
myContext = (FragmentActivity)getContext();
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//position = getArguments().getInt("pos");
//toolbar.getMenu().clear();
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
//return inflater.inflate(R.layout.fragment_bluetooth_search, container, false);
View view = inflater.inflate(R.layout.fragment_bluetooth_search, container, false);
//TextView text = (TextView)getActivity().findViewById(R.id.view);
//text.setText("i am the real text ");
//hideAction.customBlueToothToolbar();
//FloatingActionButton fl = (FloatingActionButton)getActivity().findViewById(R.id.fab);
//fl.setImageResource(R.drawable.ic_popup_sync_24);
return view;
}
#Override
public void onViewCreated(View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
}
}
public class BeaconAdapter extends BaseAdapter {
private ArrayList<Beacon> beacons;
#Override
public int getCount() {
return arrayL.size();
}
#Override
public Beacon getItem(int arg0) {
return arrayL.get(arg0);
}
#Override
public long getItemId(int arg0) {
return arg0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
try {
ViewHolder holder;
if (convertView != null) {
holder = (ViewHolder) convertView.getTag();
} else {
holder = new ViewHolder(convertView = inflater.inflate(R.layout.tupple_monitoring, null));
}
if (beacons.get(position).getParserIdentifier() != null)
holder.beacon_uuid.setText("UUID: " + arrayL.get(position).getParserIdentifier());
holder.beacon_major.setText("Major: " + arrayL.get(position).getBeaconTypeCode());
holder.beacon_minor.setText(", Minor: " + arrayL.get(position).getBluetoothName());
holder.beacon_proximity.setText("Proximity: " + arrayL.get(position).getDistance());
holder.beacon_rssi.setText(", Rssi: " + arrayL.get(position).getRssi());
holder.beacon_txpower.setText(", TxPower: " + arrayL.get(position).getTxPower());
holder.beacon_range.setText("" + arrayL.get(position).getExtraDataFields());
} catch (Exception e) {
e.printStackTrace();
}
return convertView;
}
private class ViewHolder {
private TextView beacon_uuid;
private TextView beacon_major;
private TextView beacon_minor;
private TextView beacon_proximity;
private TextView beacon_rssi;
private TextView beacon_txpower;
private TextView beacon_range;
public ViewHolder(View view) {
beacon_uuid = (TextView) view.findViewById(R.id.BEACON_uuid);
beacon_major = (TextView) view.findViewById(R.id.BEACON_major);
beacon_minor = (TextView) view.findViewById(R.id.BEACON_minor);
beacon_proximity = (TextView) view.findViewById(R.id.BEACON_proximity);
beacon_rssi = (TextView) view.findViewById(R.id.BEACON_rssi);
beacon_txpower = (TextView) view.findViewById(R.id.BEACON_txpower);
beacon_range = (TextView) view.findViewById(R.id.BEACON_range);
view.setTag(this);
}
}
}
I am using a BeaconManager class to range and scan my beacons, the library is from package org.altbeacon.beacon

I lost my View Pager Data When I Back From next tab

I am having four tab in my View pager I have search in google but I can,t found any solution when Swipe my view pager it work fine like 1-2-3-4 but when I try to swipe reverse 4-3-2-1 than my data get lost or you can say my adapter get lost.My View Pager is inside Activity.My Data is lost when I go to next page and back then back my data is lost.
My Main Activity is:
public class MainActivity extends AppCompatActivity {
public static int notificationCountCart = 0;
Toolbar toolbar;
ActionBar actionBar;
static ViewPager viewPager;
static TabLayout tabLayout;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
if (toolbar != null)
setSupportActionBar(toolbar);
actionBar = getSupportActionBar();
if (actionBar != null) {
TextView textView = new TextView(this);
textView.setText("Shopping");
textView.setTextSize(20);
textView.setTypeface(null, Typeface.BOLD);
textView.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT));
textView.setGravity(Gravity.CENTER);
textView.setTextColor(getResources().getColor(R.color.white));
getSupportActionBar().setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
getSupportActionBar().setCustomView(textView);
actionBar.setDisplayShowTitleEnabled(false);
actionBar.setDisplayHomeAsUpEnabled(true);
actionBar.setHomeAsUpIndicator(new IconDrawable(this, FontAwesomeIcons.fa_angle_left).colorRes(R.color.white).actionBarSize());
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
viewPager = (ViewPager) findViewById(R.id.viewpagerrr);
tabLayout = (TabLayout) findViewById(R.id.tabs);
setupViewPager(viewPager);
tabLayout.setupWithViewPager(viewPager);
}
#Override
protected void onResume() {
super.onResume();
invalidateOptionsMenu();
}
#Override
public void onBackPressed() {
super.onBackPressed();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onPrepareOptionsMenu(Menu menu) {
// Get the notifications MenuItem and
// its LayerDrawable (layer-list)
MenuItem item = menu.findItem(R.id.action_cart);
NotificationCountSetClass.setAddToCart(MainActivity.this, item, notificationCountCart);
// force the ActionBar to relayout its MenuItems.
// onCreateOptionsMenu(Menu) will be called again.
invalidateOptionsMenu();
return super.onPrepareOptionsMenu(menu);
}
#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_search) {
startActivity(new Intent(MainActivity.this, SearchResultActivity.class));
return true;
} else if (id == R.id.action_cart) {
/* NotificationCountSetClass.setAddToCart(MainActivity.this, item, notificationCount);
invalidateOptionsMenu();*/
startActivity(new Intent(MainActivity.this, CartListActivity.class));
/* notificationCount=0;//clear notification count
invalidateOptionsMenu();*/
return true;
} else if (id == android.R.id.home) {
Intent intent = new Intent(MainActivity.this, HomeActivity.class);
startActivity(intent);
// startActivity(new Intent(MainActivity.this, EmptyActivity.class));
}
return super.onOptionsItemSelected(item);
}
private void setupViewPager(ViewPager viewPager) {
Adapter adapter = new Adapter(getSupportFragmentManager());
ImageListFragment fragment = new ImageListFragment();
SpeakerFragment speakerFragment = new SpeakerFragment();
adapter.addFragment(fragment, getString(R.string.item_2));
adapter.addFragment(speakerFragment, getString(R.string.item_4));
adapter.addFragment(new HeadPhone(), getString(R.string.item_3));
adapter.addFragment(new Offer(), getString(R.string.item_1));
viewPager.setAdapter(adapter);
viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
#Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
#Override
public void onPageSelected(int position) {
}
#Override
public void onPageScrollStateChanged(int state) {
}
});
}
static class Adapter extends FragmentPagerAdapter {
private final List<Fragment> mFragments = new ArrayList<>();
private final List<String> mFragmentTitles = new ArrayList<>();
public Adapter(FragmentManager fm) {
super(fm);
}
public void addFragment(Fragment fragment, String title) {
mFragments.add(fragment);
mFragmentTitles.add(title);
}
#Override
public Fragment getItem(int position) {
return mFragments.get(position);
}
#Override
public int getCount() {
return mFragments.size();
}
#Override
public CharSequence getPageTitle(int position) {
return mFragmentTitles.get(position);
}
}
}
My Fragment is
public class ImageListFragment extends Fragment {
String category_Name, Category_ID, Product_ID, Product_Name,
Product_Image, Product_Price, Product_Sale, Cart;
public static final String STRING_IMAGE_URI = "ImageUri";
public static final String STRING_IMAGE_POSITION = "ImagePosition";
private static MainActivity mActivity;
ArrayList<SingleItemModel> singleItemModels;
RecyclerView recyclerView;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getCategoryone();
Fresco.initialize(getContext());
mActivity = (MainActivity) getActivity();
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
recyclerView = (RecyclerView) inflater.inflate(R.layout.layout_recylerview_list, container, false);
return recyclerView;
}
public static class SimpleStringRecyclerViewAdapter
extends RecyclerView.Adapter<ImageListFragment.SimpleStringRecyclerViewAdapter.ViewHolder> {
// private String[] mValues;
private ArrayList<SingleItemModel> mValues;
private RecyclerView mRecyclerView;
public static class ViewHolder extends RecyclerView.ViewHolder {
public final View mView;
public final SimpleDraweeView mImageView;
public final LinearLayout mLayoutItem;
public final ImageView mImageViewWishlist;
TextView iTemName, itemDescription, itemPrice;
public ViewHolder(View view) {
super(view);
mView = view;
mImageView = (SimpleDraweeView) view.findViewById(R.id.image1);
mLayoutItem = (LinearLayout) view.findViewById(R.id.layout_item);
mImageViewWishlist = (ImageView) view.findViewById(R.id.ic_wishlist);
iTemName = (TextView) view.findViewById(R.id.itemName);
itemDescription = (TextView) view.findViewById(R.id.itemDescription);
itemPrice = (TextView) view.findViewById(R.id.itemPrice);
}
}
public SimpleStringRecyclerViewAdapter(RecyclerView recyclerView, ArrayList<SingleItemModel> items) {
mValues = items;
mRecyclerView = recyclerView;
}
#Override
public ImageListFragment.SimpleStringRecyclerViewAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.list_item, parent, false);
return new ImageListFragment.SimpleStringRecyclerViewAdapter.ViewHolder(view);
}
#Override
public void onViewRecycled(ImageListFragment.SimpleStringRecyclerViewAdapter.ViewHolder holder) {
if (holder.mImageView.getController() != null) {
holder.mImageView.getController().onDetach();
}
if (holder.mImageView.getTopLevelDrawable() != null) {
holder.mImageView.getTopLevelDrawable().setCallback(null);
//
}
}
#Override
public void onBindViewHolder(final ImageListFragment.SimpleStringRecyclerViewAdapter.ViewHolder holder, final int position) {
SingleItemModel singleItemModel = mValues.get(position);
holder.iTemName.setText(singleItemModel.getCategory_Name());
final Uri uri = Uri.parse(singleItemModel.getProduct_Image());
holder.mImageView.setImageURI(uri);
holder.itemPrice.setText(singleItemModel.getProduct_Price());
holder.itemDescription.setText(singleItemModel.getProduct_Sale());
}
#Override
public int getItemCount() {
return mValues.size();
}
}
public void getCategoryone() {
final RequestQueue queue = Volley.newRequestQueue(getActivity());
StringRequest stringRequest = new StringRequest(Request.Method.POST, "http://proaudiobrands.com/app/feature.php",
new Response.Listener<String>() {
#Override
public void onResponse(String response) {
Log.i("shabina shopping response", response);
try {
singleItemModels = new ArrayList<>();
JSONObject mainObj = new JSONObject(response);
Log.d("shabina ", response);
JSONArray Feature_product = mainObj.getJSONArray("Feature_product");
for (int i = 0; i < Feature_product.length(); i++) {
JSONObject Feature_Product = Feature_product.getJSONObject(i);
String Category_Namee = Feature_Product.getString("Category_Namee");
String Category_IDs = Feature_Product.getString("Category_IDs");
JSONArray Product_List = Feature_Product.getJSONArray("Product_List");
for (int j = 0; j < Product_List.length(); j++) {
JSONObject Category_Name = Product_List.getJSONObject(j);
if (Category_Name.getString("Category_Name").equals("Microphones")) {
category_Name = Category_Name.getString("Category_Name");
Category_ID = Category_Name.getString("Category_ID");
Product_ID = Category_Name.getString("Product_ID");
Product_Name = Category_Name.getString("Product_Name");
Product_Image = Category_Name.getString("Product_Image");
Product_Price = Category_Name.getString("Product_Price");
Product_Sale = Category_Name.getString("Product_Sale");
Cart = Category_Name.getString("Cart");
Log.e("sushil Category_Name", category_Name + " " + Category_ID + " " + Product_ID + " " + Product_Name + " " + Product_Image + " " + Product_Price + " " + Product_Sale + " " + Cart);
SingleItemModel singleItemModel1 = new SingleItemModel(category_Name, Category_ID, Product_ID, Product_Name, Product_Image, Product_Price, Product_Sale, Cart);
singleItemModels.add(singleItemModel1);
}
StaggeredGridLayoutManager layoutManager = new StaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL);
recyclerView.setLayoutManager(layoutManager);
recyclerView.setAdapter(new ImageListFragment.SimpleStringRecyclerViewAdapter(recyclerView, singleItemModels));
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Log.e("error", error.toString());
}
}) {
#Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String, String> params = new HashMap<>();
params.put("method", "feature");
params.put("userId", "PRO1");
return params;
}
};
stringRequest.setRetryPolicy(new DefaultRetryPolicy(
90000,
DefaultRetryPolicy.DEFAULT_MAX_RETRIES,
DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
queue.add(stringRequest);
}
}

Replace your MainActivity with below
public class MainActivity extends AppCompatActivity {
public static int notificationCountCart = 0;
Toolbar toolbar;
ActionBar actionBar;
static ViewPager viewPager;
static TabLayout tabLayout;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
if (toolbar != null)
setSupportActionBar(toolbar);
actionBar = getSupportActionBar();
if (actionBar != null) {
TextView textView = new TextView(this);
textView.setText("Shopping");
textView.setTextSize(20);
textView.setTypeface(null, Typeface.BOLD);
textView.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT));
textView.setGravity(Gravity.CENTER);
textView.setTextColor(getResources().getColor(R.color.white));
getSupportActionBar().setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
getSupportActionBar().setCustomView(textView);
actionBar.setDisplayShowTitleEnabled(false);
actionBar.setDisplayHomeAsUpEnabled(true);
actionBar.setHomeAsUpIndicator(new IconDrawable(this, FontAwesomeIcons.fa_angle_left).colorRes(R.color.white).actionBarSize());
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
viewPager = (ViewPager) findViewById(R.id.viewpagerrr);
viewPager.setOffscreenPageLimit(4);
tabLayout = (TabLayout) findViewById(R.id.tabs);
setupViewPager(viewPager);
tabLayout.setupWithViewPager(viewPager);
}
#Override
protected void onResume() {
super.onResume();
invalidateOptionsMenu();
}
#Override
public void onBackPressed() {
super.onBackPressed();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onPrepareOptionsMenu(Menu menu) {
// Get the notifications MenuItem and
// its LayerDrawable (layer-list)
MenuItem item = menu.findItem(R.id.action_cart);
NotificationCountSetClass.setAddToCart(MainActivity.this, item, notificationCountCart);
// force the ActionBar to relayout its MenuItems.
// onCreateOptionsMenu(Menu) will be called again.
invalidateOptionsMenu();
return super.onPrepareOptionsMenu(menu);
}
#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_search) {
startActivity(new Intent(MainActivity.this, SearchResultActivity.class));
return true;
} else if (id == R.id.action_cart) {
/* NotificationCountSetClass.setAddToCart(MainActivity.this, item, notificationCount);
invalidateOptionsMenu();*/
startActivity(new Intent(MainActivity.this, CartListActivity.class));
/* notificationCount=0;//clear notification count
invalidateOptionsMenu();*/
return true;
} else if (id == android.R.id.home) {
Intent intent = new Intent(MainActivity.this, HomeActivity.class);
startActivity(intent);
// startActivity(new Intent(MainActivity.this, EmptyActivity.class));
}
return super.onOptionsItemSelected(item);
}
private void setupViewPager(ViewPager viewPager) {
Adapter adapter = new Adapter(getSupportFragmentManager());
ImageListFragment fragment = new ImageListFragment();
SpeakerFragment speakerFragment = new SpeakerFragment();
adapter.addFragment(fragment, getString(R.string.item_2));
adapter.addFragment(speakerFragment, getString(R.string.item_4));
adapter.addFragment(new HeadPhone(), getString(R.string.item_3));
adapter.addFragment(new Offer(), getString(R.string.item_1));
viewPager.setAdapter(adapter);
viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
#Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
#Override
public void onPageSelected(int position) {
}
#Override
public void onPageScrollStateChanged(int state) {
}
});
}
static class Adapter extends FragmentPagerAdapter {
private final List<Fragment> mFragments = new ArrayList<>();
private final List<String> mFragmentTitles = new ArrayList<>();
public Adapter(FragmentManager fm) {
super(fm);
}
public void addFragment(Fragment fragment, String title) {
mFragments.add(fragment);
mFragmentTitles.add(title);
}
#Override
public Fragment getItem(int position) {
return mFragments.get(position);
}
#Override
public int getCount() {
return mFragments.size();
}
#Override
public CharSequence getPageTitle(int position) {
return mFragmentTitles.get(position);
}
}
}

I need to create a first and last button for my ViewPager

Hello need help with a class trying to figure out how to create a first and last button in a fragment that will jump to the first item in a ViewPager and the last item in a ViewPager I'm a bit lost with how to implement. Here is the fragment.
public class CrimeFragment extends Fragment {
private static final String ARG_CRIME_ID = "crime_id";
private static final String DIALOG_DATE = "DialogDate";
private static final int REQUEST_DATE = 0;
private Crime mCrime;
private EditText mTitleField;
private Button mDateButton;
private CheckBox mSolvedCheckBox;
private Spinner mSpinner;
private Button mFirstButton;
private Button mLastButton;
public static CrimeFragment newInstance(UUID crimeId) {
Bundle args = new Bundle();
args.putSerializable(ARG_CRIME_ID, crimeId);
CrimeFragment fragment = new CrimeFragment();
fragment.setArguments(args);
return fragment;
}
#Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode != Activity.RESULT_OK) {
return;
}
if (requestCode == REQUEST_DATE) {
Date date =
(Date) data.getSerializableExtra(DatePickerFragment.EXTRA_DATE);
mCrime.setDate(date);
updateDate();
}
}
private void updateDate() {
mDateButton.setText(mCrime.getDate().toString());
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
UUID crimeId = (UUID) getArguments().getSerializable(ARG_CRIME_ID);
mCrime = CrimeLab.get(getActivity()).getCrime(crimeId);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_crime, container, false);
mTitleField = (EditText)v.findViewById(R.id.crime_title);
mTitleField.setText(mCrime.getTitle());
mTitleField.addTextChangedListener(new TextWatcher() {
#Override
public void beforeTextChanged(
CharSequence s, int start, int count, int after) {
}
#Override
public void onTextChanged(
CharSequence s, int start, int before, int count) {
}
#Override
public void afterTextChanged(Editable s) {
}
});
mDateButton = (Button) v.findViewById(R.id.crime_date);
updateDate();
mDateButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
FragmentManager manager = getFragmentManager();
DatePickerFragment dialog = DatePickerFragment.newInstance(mCrime.getDate());
dialog.setTargetFragment(CrimeFragment.this, REQUEST_DATE);
dialog.show(manager, DIALOG_DATE);
}
});
mSpinner = (Spinner) v.findViewById(R.id.crime_severity);
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this.getActivity(),
R.array.severity_array, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
mSpinner.setAdapter(adapter);
mSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {
mCrime.setSeverity((String) mSpinner.getSelectedItem());
}
#Override
public void onNothingSelected(AdapterView<?> parentView) {
}
});
mSolvedCheckBox = (CheckBox) v.findViewById(R.id.crime_solved);
mSolvedCheckBox.setChecked(mCrime.isSolved());
mSolvedCheckBox.setOnCheckedChangeListener(
new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton compoundButton, boolean isChecked) {
mCrime.setSolved(isChecked);
}
});
mFirstButton = (Button) v.findViewById(R.id.first_crime_button);
mFirstButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
}
});
mLastButton = (Button) v.findViewById(R.id.last_crime_button);
mLastButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
}
});
return v;
}
}
Here is the Activity with the ViewPager.
public class CrimePagerActivity extends FragmentActivity{
private static final String EXTRA_CRIME_ID = "com.martin.android.criminalintent.crime_id";
private ViewPager mViewPager;
private List<Crime> mCrimes;
public static Intent newIntent(Context packageContext, UUID crimeId) {
Intent intent = new Intent(packageContext, CrimePagerActivity.class);
intent.putExtra(EXTRA_CRIME_ID, crimeId);
return intent;
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_crime_pager);
UUID crimeId = (UUID) getIntent().getSerializableExtra(EXTRA_CRIME_ID);
mViewPager = (ViewPager) findViewById(R.id.activity_crime_pager_view_pager);
mCrimes = CrimeLab.get(this).getCrimes();
FragmentManager fragmentManager = getSupportFragmentManager();
mViewPager.setAdapter(new FragmentStatePagerAdapter(fragmentManager) {
#Override
public Fragment getItem(int position) {
Crime crime = mCrimes.get(position);
return CrimeFragment.newInstance(crime.getId());
}
#Override
public int getCount() {
return mCrimes.size();
}
});
for (int i = 0; i < mCrimes.size(); i++) {
if (mCrimes.get(i).getId().equals(crimeId)) {
mViewPager.setCurrentItem(i);
break;
}
}
}
}
For the First button Im pretty sure I just need to set item to 0? For last button I need to set item to size - 1 just not sure how to do that.

In your CrimePagerActivity, write two method's to jump to the ViewPager first page and last page.
CrimePagerActivity.java:
public void jumpToFirstPage() {
mViewPager.setCurrentItem(0);
}
public void jumpToLastPage() {
mViewPager.setCurrentItem(mCrimes.size() - 1);
}
Call those method's from mFirstButton and mLastButton click listener method:
CrimeFragment.java:
mFirstButton = (Button) v.findViewById(R.id.first_crime_button);
mFirstButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
((CrimePagerActivity)getActivity()).jumpToFirstPage();
}
});
mLastButton = (Button) v.findViewById(R.id.last_crime_button);
mLastButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
((CrimePagerActivity)getActivity()).jumpToLastPage();
}
});
Hope this will work perfectly.

Ok this was a answer that I was given by the teacher incase anyone is interested.
mFirstButton = (Button) v.findViewById(R.id.first_crime_button);
mFirstButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
ViewPager pager = (ViewPager) getActivity().findViewById(R.id.activity_crime_pager_view_pager);
pager.setCurrentItem(0);
}
});
mLastButton = (Button) v.findViewById(R.id.last_crime_button);
mLastButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
ViewPager pager = (ViewPager) getActivity().findViewById(R.id.activity_crime_pager_view_pager);
pager.setCurrentItem(CrimeLab.get(getActivity()).getCrimes().size()-1);
}
});

Create two button and on click set
viewPager.setCurrentItem(0); // for top
and
viewPager.setCurrentItem(mCrimes.size()); // for last

We Keep Coding

Java is a programming language and computing platform first released by Sun Microsystems in 1995.

AbstractTracker says Looper.prepare() is not called - java

Related

How to show dynamic items in one row of RecyclerView? When the row clicked shows all items again

Have some hard-coded value in RoomDatabase that won't disappear after uninstalling

Bluetooth beacon Scanning using android beacon library

I lost my View Pager Data When I Back From next tab

I need to create a first and last button for my ViewPager

Categories

Resources