I am trying to create an android app witch loads local HTML pages in webview, I managed to make that part work, but now I have a drawer menu with some strings and when I click one of them I want to open a different HTML page, I am stuck on this part so I'm asking for some guidelines.
This is my code in MainActivity.java
public class MainActivity extends ActionBarActivity {
private WebView mWebView;
private ListView mDrawerList;
private DrawerLayout mDrawerLayout;
private ArrayAdapter<String> mAdapter;
private ActionBarDrawerToggle mDrawerToggle;
private String mActivityTitle;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mWebView = (WebView) findViewById(R.id.activity_main_webview);
mDrawerList = (ListView)findViewById(R.id.navList);mDrawerLayout = (DrawerLayout)findViewById(R.id.drawer_layout);
mActivityTitle = getTitle().toString();
addDrawerItems();
setupDrawer();
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
WebSettings webSettings = mWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
mWebView.setWebViewClient(new MyAppWebViewClient());
mWebView.loadUrl("file:///android_asset/www/index.html");
}
#Override
public void onBackPressed() {
if(mWebView.canGoBack()) {
mWebView.goBack();
} else {
super.onBackPressed();
}
}
private void addDrawerItems() {
String[] osArray = { "Android", "black" };
mAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, osArray);
mDrawerList.setAdapter(mAdapter);
mDrawerList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(MainActivity.this, "Time for an upgrade!", Toast.LENGTH_SHORT).show();
//load file to webView
mWebView.loadUrl("file:///android_asset/www/help.html");
//close drawer
mDrawerLayout.closeDrawers();
}
});
}
private void setupDrawer() {
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, R.string.drawer_open, R.string.drawer_close) {
/** Called when a drawer has settled in a completely open state. */
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
getSupportActionBar().setTitle("Navigation!");
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
}
/** Called when a drawer has settled in a completely closed state. */
public void onDrawerClosed(View view) {
super.onDrawerClosed(view);
getSupportActionBar().setTitle(mActivityTitle);
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
}
};
mDrawerToggle.setDrawerIndicatorEnabled(true);
mDrawerLayout.setDrawerListener(mDrawerToggle);
}
#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);
mDrawerToggle.onConfigurationChanged(newConfig);
}
#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_main, 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;
}
// Activate the navigation drawer toggle
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
See comments in code:
private void addDrawerItems() {
String[] osArray = { "Android", "black" };
//create also an array of paths to html files
final String[] pathsArray = { "file:///android_asset/www/help.html", "HERE_MUST_BE_ANOTHER_PATH_TO_ANOTHER_FILE" };
mAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, osArray);
mDrawerList.setAdapter(mAdapter);
mDrawerList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(MainActivity.this, "Time for an upgrade!", Toast.LENGTH_SHORT).show();
//load file to webView from pathsArray
// getting current path from arg. position
mWebView.loadUrl(pathsArray[position]);
//close drawer
mDrawerLayout.closeDrawers();
}
});
}
Related
I know that this question is asked many times but we have different situation. Regarding the project I downloaded the project navigation drawer demo from GitHub.com. Provided the code below:
this is the main activity:
package edu.ejapp.dotalegitstore;
#SuppressLint("NewApi")
public class MainActivity extends BaseActivity {
FragmentStackManager fm,sliding_menu;
private Context context;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
context=this;
setUpView();
menuToggeleSetUp(savedInstanceState);
}
void setUpView(){
fm = new FragmentStackManager(this);
sliding_menu = new FragmentStackManager(this);
drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
fm.addFragment(new MainFragment(), R.id.main_frame, false, FragmentTransaction.TRANSIT_NONE, false);
sliding_menu.addFragment(new SlidingMenuFragment(), R.id.slide_fragment, false, FragmentTransaction.TRANSIT_NONE, false);
}
void menuToggeleSetUp(Bundle savedInstanceState){
mDrawerToggle = new ActionBarDrawerToggle(this, drawer,
R.drawable.ic_drawer, // nav menu toggle icon
R.string.app_name
) {
#SuppressLint("NewApi")
public void onDrawerClosed(View view) {
getSupportActionBar().setTitle(mTitle);
// calling onPrepareOptionsMenu() to show action bar icons
invalidateOptionsMenu();
}
public void onDrawerOpened(View drawerView) {
getSupportActionBar().setTitle(mDrawerTitle);
// calling onPrepareOptionsMenu() to hide action bar icons
invalidateOptionsMenu();
}
};
drawer.setDrawerListener(mDrawerToggle);
if (savedInstanceState == null) {
// on first time display view for first nav item
}
}
#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
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
// Sync the toggle state after onRestoreInstanceState has occurred.
mDrawerToggle.syncState();
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
if (id == R.id.action_settings) {
return true;
}
else if (id == R.id.action_exit) {
final AlertDialog.Builder dialog = new AlertDialog.Builder(context);
dialog.setTitle("COnfirm exit");
dialog.setMessage("Are you sure you want to exit?");
dialog.setPositiveButton("No", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
dialog.dismiss();
}
});
dialog.setNegativeButton("Yes", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
finish();
}
});
AlertDialog alertDialog = dialog.create();
alertDialog.show();
}
else if (id == R.id.action_login) {
startActivity(new Intent(MainActivity.this, LoginActivity.class));
}
else {
}
return super.onOptionsItemSelected(item);
}
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
// Pass any configuration change to the drawer toggls
mDrawerToggle.onConfigurationChanged(newConfig);
}
}
The base activity extended by MainActivity:
package edu.ejapp.dotalegitstore;
import android.graphics.drawable.ColorDrawable;
import android.os.Bundle;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBarDrawerToggle;
#SuppressWarnings("deprecation")
public class BaseActivity extends ActionBarActivity{
public ActionBarDrawerToggle mDrawerToggle;
public DrawerLayout drawer;
CharSequence mDrawerTitle;
CharSequence mTitle;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setActionBar();
}
public void setActionBar(){
getSupportActionBar().setTitle("");
getSupportActionBar().setBackgroundDrawable(new ColorDrawable(this.getResources().getColor(R.color.app_main)));
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
}
}
and lastly the sliding fragment activity, here the on item click is implemented not in baseactivity or main which is the reason of my problem: i cant close the drawer when i clicked item on the drawer:
public class SlidingMenuFragment extends Fragment {
List<String> data;
ListView list_view;
SlidingMenuListAdapter adapter;
#SuppressLint("InflateParams")
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
ViewGroup root = (ViewGroup) inflater.inflate(R.layout.fragment_sliding_menu, null);
setUpView(root);
return root;
}
void setUpView(ViewGroup root){
list_view = (ListView)root.findViewById(R.id.list_view);
initList();
setUpClick();
}
void initList(){
data = new ArrayList<String>();
data.add("Home");
data.add("Arcana");
data.add("Courrier");
data.add("Hero Sets");
data.add("Immortals");
adapter = new SlidingMenuListAdapter(getActivity(),data);
list_view.setAdapter(adapter);
}
void setUpClick(){
list_view.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(getActivity(),"Hi "+position,Toast.LENGTH_SHORT).show();
}
});
}
}
I didnt include the other files such as the xmls. My question is:
How can I close the drawer when I clicked item of the list view provided that the onitemclick is defined in SlidingMenuFragment class and the mDrawerlayout is located in BaseActivity class which is extended by MainActivity class?
create a method to close drawer in your main activity and call it from fragment.
public static void closeDrawer(){
if(drawerLayout.isDrawerOpen(leftDrawerList)){
drawerLayout.closeDrawer(leftDrawerList);
}
}
Inside Fragment
MainActivity.closeDrawer();
here is my suggestion：
provide an interface in SlidingMenuFragment like:
public class SlidingMenuFragment extends Fragment {
private OnListItemClickListener mOnListItemClickListener;
//here is mOnListItemClickListener getter and setter method
public *** set(get)OnListItemClickListener(){};
//define a interface here
public interface OnListItemClickListener{
public void onListenItemClick();
}
.
.
.
void setUpClick(){
list_view.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
if(mOnListItemClickListener != null){
mOnListItemClickListener.onListenItemClick();
}
}
});
}
}
and then you should implement this interface in your MainActivity class like:
public class MainActivity extends BaseActivity {
void setUpView(){
fm = new FragmentStackManager(this);
sliding_menu = new FragmentStackManager(this);
drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
fm.addFragment(new MainFragment(), R.id.main_frame, false, FragmentTransaction.TRANSIT_NONE, false);
SlidingMenuFragment smFragment = new SlidingMenuFragment()
smFragment.setMonListItemClickListener(new OnListItemClickListener(){
public void onListenItemClick(){
drawer.close();
}
});
sliding_menu.addFragment(smFragment, R.id.slide_fragment, false, FragmentTransaction.TRANSIT_NONE, false);
}
}`
Process: I click on item in navigation drawer in Main activity and start new Activity, then if I click on back button or somehow restore my Main activity weird dim happens.
If I set ScrimColor of my DrawerLayout to TRANSPARENT, then animation looks normal. Otherwise I see at the end of Fade out animation a little blink (dim) from darker color to actual background (quite annoying).
If I start the same activity from normal button, the animation is good.
Do you know how to fix it?
Screen record: https://youtu.be/1A06wE1ebzQ
- Interesting thing was that while I was recording via KitKat record, sometimes the animation was looking good.
Drawer code:
public class DrawerActivity extends AppCompatActivity {
private String[] mMenuTitles;
private DrawerLayout mDrawerLayout;
private ListView mDrawerList;
private CharSequence mTitle;
private ActionBarDrawerToggle mDrawerToggle;
protected void onCreateDrawer() {
mTitle = getResources().getString(R.string.app_name);
mMenuTitles = new String[]{getString(R.string.drawer_activity1),
getString(R.string.drawer_activity2),
getString(R.string.drawer_activity3)};
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerLayout.setScrimColor
(getResources().getColor(R.color.black_transparent_30));
// mDrawerLayout.setScrimColor(Color.TRANSPARENT);
mDrawerList = (ListView) findViewById(R.id.left_drawer);
// Set the adapter for the list view
mDrawerList.setAdapter(new ArrayAdapter<String>(this,
R.layout.drawer_list_item, mMenuTitles));
// Set the list's click listener
mDrawerList.setOnItemClickListener(new DrawerItemClickListener());
mDrawerToggle = new ActionBarDrawerToggle(
this, /* host Activity */
mDrawerLayout, /* DrawerLayout object */
R.string.drawer_open, /* "open drawer" description */
R.string.drawer_close /* "close drawer" description */
) {
public void onDrawerClosed(View view) {
setCheckedItem(mDrawerList);
// getSupportActionBar().setTitle(mTitle);
}
/** Called when a drawer has settled in a completely open state. */
public void onDrawerOpened(View drawerView) {
// getSupportActionBar().setTitle(mTitle);
}
};
// Set the drawer toggle as the DrawerListener
mDrawerLayout.setDrawerListener(mDrawerToggle);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
}
public void setCheckedItem(ListView mDrawerList) {
}
#Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
setCheckedItem(mDrawerList);
// Sync the toggle state after onRestoreInstanceState has occurred.
mDrawerToggle.syncState();
}
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
mDrawerToggle.onConfigurationChanged(newConfig);
}
private void selectItem(int position) {
mDrawerList.setItemChecked(position, true);
startMyActivity(position);
mDrawerLayout.closeDrawer(mDrawerList);
}
public void startMyActivity(int position) {
}
private class DrawerItemClickListener implements
ListView.OnItemClickListener {
#Override
public void onItemClick(AdapterView parent, View view, int position,
long id) {
selectItem(position);
}
}
public void setTitle(CharSequence title) {
mTitle = title;
getSupportActionBar().setTitle(mTitle);
}
#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;
}
// Pass the event to ActionBarDrawerToggle, if it returns
// true, then it has handled the app icon touch event
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
I have a Navigation Drawer in my App.I have the items in the drawer but I don't know how I can open new Activity from each of items .
I have Tried some Methods & Commented It ...
Thanks for your Help ...
MainActivity
public class MainActivity extends ActionBarActivity
{
private ListView mDrawerList;
protected DrawerLayout mDrawer;
private CustomActionBarDrawerToggle mDrawerToggle;
private String[] menuItems;
String LOG_TAG = "Remote It";
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
supportRequestWindowFeature(WindowCompat.FEATURE_ACTION_BAR);
// getSupportActionBar().hide();
setContentView(R.layout.activity_main_drawer);
// enable ActionBar app icon to behave as action to toggle nav drawer
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
mDrawer = (DrawerLayout) findViewById(R.id.drawer_layout);
// set a custom shadow that overlays the main content when the drawer
// opens
mDrawer.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START);
_initMenu();
mDrawerToggle = new CustomActionBarDrawerToggle(this, mDrawer);
mDrawer.setDrawerListener(mDrawerToggle);
// if (savedInstanceState == null)
// {
// selectItem(0);
// }
}
private void _initMenu()
{
NsMenuAdapter mAdapter = new NsMenuAdapter(this);
// Add Header
mAdapter.addHeader(R.string.ns_menu_main_header);
// Add first block
menuItems = getResources().getStringArray(R.array.ns_menu_items);
String[] menuItemsIcon = getResources().getStringArray(R.array.ns_menu_items_icon);
int res = 0;
for (String item : menuItems)
{
int id_title = getResources().getIdentifier(item, "string", this.getPackageName());
int id_icon = getResources().getIdentifier(menuItemsIcon[res], "drawable", this.getPackageName());
NsMenuItemModel mItem = new NsMenuItemModel(id_title, id_icon);
// if (res==1) mItem.counter=12; //it is just an example...
// if (res==3) mItem.counter=3; //it is just an example...
mAdapter.addItem(mItem);
res++;
}
mAdapter.addHeader(R.string.ns_menu_main_header2);
mDrawerList = (ListView) findViewById(R.id.drawer);
if (mDrawerList != null)
mDrawerList.setAdapter(mAdapter);
mDrawerList.setOnItemClickListener(new DrawerItemClickListener());
}
#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);
mDrawerToggle.onConfigurationChanged(newConfig);
}
#Override
public boolean onCreateOptionsMenu(Menu menu)
{
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.control_menu, menu);
return super.onCreateOptionsMenu(menu);
}
/* Called whenever we call invalidateOptionsMenu() */
#Override
public boolean onPrepareOptionsMenu(Menu menu)
{
// If the nav drawer is open, hide action items related to the content
// view
boolean drawerOpen = mDrawer.isDrawerOpen(mDrawerList);
menu.findItem(R.id.action_keyboard).setVisible(!drawerOpen);
return super.onPrepareOptionsMenu(menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item)
{
/*
* The action bar home/up should open or close the drawer.
* ActionBarDrawerToggle will take care of this.
*/
if (mDrawerToggle.onOptionsItemSelected(item))
{
return true;
}
// Handle your other action bar items...
return super.onOptionsItemSelected(item);
}
private class CustomActionBarDrawerToggle extends ActionBarDrawerToggle
{
public CustomActionBarDrawerToggle(Activity mActivity, DrawerLayout mDrawerLayout)
{
super(mActivity, mDrawerLayout, R.drawable.ic_drawer, R.string.ns_menu_open, R.string.ns_menu_close);
}
#Override
public void onDrawerClosed(View view)
{
getSupportActionBar().setTitle(getString(R.string.ns_menu_close));
supportInvalidateOptionsMenu(); // creates call to
// onPrepareOptionsMenu()
}
#Override
public void onDrawerOpened(View drawerView)
{
getSupportActionBar().setTitle(getString(R.string.ns_menu_open));
supportInvalidateOptionsMenu(); // creates call to
// onPrepareOptionsMenu()
}
}
//private void selectItem(int position)
//{
// switch (position)
// {
// case 1:
// Intent a = new Intent(MainActivity.this, ControlActivity.class);
// startActivity(a);
// break;
// case 2:
// Intent b = new Intent(MainActivity.this, Tutorial.class);
// startActivity(b);
// break;
// default:
// }
//}
private class DrawerItemClickListener implements ListView.OnItemClickListener
{
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id)
{
// Highlight the selected item, update the title, and close the
// drawer
// update selected item and title, then close the drawer
//mDrawerList.setItemChecked(position, true);
// String text = "menu click... should be implemented";
// Toast.makeText(MainActivity.this, text,
// Toast.LENGTH_LONG).show();
// // You should reset item counter
//mDrawer.closeDrawer(mDrawerList);
Intent intent = new Intent(MainActivity.this, Tutorial.class);
startActivity(intent);
}
}
}
NOTE
I need it to work with activities & not with Fragments .
If you want your NavigationDrawer in all your activities you can launch from the NavigationDrawer, the best way to handle that is not to launch new Activity, but to replace Fragment.
Because if you launch a new Activity each time you'll need to implement your NavigationDrawer in all your subactivities. (easily doable with heritage though).
There is a nice tutorial here to play with "replace" Fragments with the NavigationDrawer :
http://manishkpr.webheavens.com/android-navigation-drawer-example-using-fragments/
I'm having some difficulties in building my first application on Android.
I've follow the tutorial from Google to make an app with a drawer it works but when I want to put something else than a picture it crash my app.
My layout appears correctly on my AVD device but when I put an onTouchListener i get a Java NullPointerException.
I suspect that it come from the fact that i don't use the good layout but I can't figure out why. Any idea ?
Thanks a lot !
It crashed on "b1.setOnTouchListener(touchListenerBouton);"
public class MainActivity extends Activity implements View.OnTouchListener{
private DrawerLayout mDrawerLayout;
private ListView mDrawerList;
private ActionBarDrawerToggle mDrawerToggle;
private CharSequence mDrawerTitle;
private CharSequence mTitle;
private String[] mPlanetTitles;
Button b1 = null;
TextView Text = null;
EditText PhraseUser = null;
TextView TxtResultat = null;
private OnTouchListener touchListenerBouton = new View.OnTouchListener()
{
#Override
public boolean onTouch(View v, MotionEvent event)
{
TxtResultat.setText("TEST")
return true;
}
};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTitle = mDrawerTitle = getTitle();
mPlanetTitles = getResources().getStringArray(R.array.planets_array);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerList = (ListView) findViewById(R.id.left_drawer);
// set a custom shadow that overlays the main content when the drawer opens
mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START);
// set up the drawer's list view with items and click listener
mDrawerList.setAdapter(new ArrayAdapter<String>(this,
R.layout.drawer_list_item, mPlanetTitles));
mDrawerList.setOnItemClickListener(new DrawerItemClickListener());
// enable ActionBar app icon to behave as action to toggle nav drawer
getActionBar().setDisplayHomeAsUpEnabled(true);
getActionBar().setHomeButtonEnabled(true);
// ActionBarDrawerToggle ties together the the proper interactions
// between the sliding drawer and the action bar app icon
mDrawerToggle = new ActionBarDrawerToggle(
this, /* host Activity */
mDrawerLayout, /* DrawerLayout object */
R.drawable.ic_drawer, /* nav drawer image to replace 'Up' caret */
R.string.drawer_open, /* "open drawer" description for accessibility */
R.string.drawer_close /* "close drawer" description for accessibility */
) {
public void onDrawerClosed(View view) {
getActionBar().setTitle(mTitle);
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
}
public void onDrawerOpened(View drawerView) {
getActionBar().setTitle(mDrawerTitle);
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
}
};
mDrawerLayout.setDrawerListener(mDrawerToggle);
if (savedInstanceState == null) {
selectItem(0);
}
b1 = (Button) findViewById(R.id.button1);
b1.setOnTouchListener(touchListenerBouton);
}
#Override
public boolean onTouch(View v, MotionEvent event) {
/* Réagir au toucher */
return true;
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main, menu);
return super.onCreateOptionsMenu(menu);
}
/* Called whenever we call invalidateOptionsMenu() */
#Override
public boolean onPrepareOptionsMenu(Menu menu) {
// If the nav drawer is open, hide action items related to the content view
boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList);
menu.findItem(R.id.action_websearch).setVisible(!drawerOpen);
return super.onPrepareOptionsMenu(menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// The action bar home/up action should open or close the drawer.
// ActionBarDrawerToggle will take care of this.
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
// Handle action buttons
switch(item.getItemId()) {
case R.id.action_websearch:
// create intent to perform web search for this planet
Intent intent = new Intent(Intent.ACTION_WEB_SEARCH);
intent.putExtra(SearchManager.QUERY, getActionBar().getTitle());
// catch event that there's no activity to handle intent
if (intent.resolveActivity(getPackageManager()) != null) {
startActivity(intent);
} else {
Toast.makeText(this, R.string.app_not_available, Toast.LENGTH_LONG).show();
}
return true;
default:
return super.onOptionsItemSelected(item);
}
}
/* The click listner for ListView in the navigation drawer */
private class DrawerItemClickListener implements ListView.OnItemClickListener {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
selectItem(position);
}
}
private void selectItem(int position) {
// update the main content by replacing fragments
System.out.println(position);
Fragment fragment = new PlanetFragment();
Bundle args = new Bundle();
args.putInt(PlanetFragment.ARG_PLANET_NUMBER, position);
fragment.setArguments(args);
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction().replace(R.id.content_frame, fragment).commit();
// update selected item and title, then close the drawer
mDrawerList.setItemChecked(position, true);
setTitle(mPlanetTitles[position]);
mDrawerLayout.closeDrawer(mDrawerList);
}
#Override
public void setTitle(CharSequence title) {
mTitle = title;
getActionBar().setTitle(mTitle);
}
/**
* When using the ActionBarDrawerToggle, you must call it during
* onPostCreate() and onConfigurationChanged()...
*/
#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);
}
/**
* Fragment that appears in the "content_frame", shows a planet
*/
public static class PlanetFragment extends Fragment {
public static final String ARG_PLANET_NUMBER = "planet_number";
public PlanetFragment() {
// Empty constructor required for fragment subclasses
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_planet, container, false);
int i = getArguments().getInt(ARG_PLANET_NUMBER);
String planet = getResources().getStringArray(R.array.planets_array)[i];
int imageId = getResources().getIdentifier(planet.toLowerCase(Locale.getDefault()),
"drawable", getActivity().getPackageName());
// ((ImageView) rootView.findViewById(R.id.image)).setImageResource(imageId);
getActivity().setTitle(planet);
return rootView;
}
}
}
Add this line inside onCreate():
TxtResultat = (textView) findViewById(R.id.**your textview's id**);
You just created a reference of the class TextView but not allocating it memory, this is why you were receiving the error of NullPointerException
You initialize null to TxtResultat
TextView TxtResultat = null;
this below line give you null pointer exception because it intialize null
TxtResultat.setText("TEST")
Give a try to this:
OnTouchListener touchListenerBouton1 = new View.OnTouchListener()
{
#Override
public boolean onTouch(View v, MotionEvent event)
{
TxtResultat.setText("TEST");
return true;
}
};
b1 = (Button) findViewById(R.id.button1);
b1.setOnTouchListener(touchListenerBouton1);
Seems b1 is null or tourchListenerBouton is null. put a break point and initialize the one which is null.
I have had this problem for a while now. Eclipse shows error when I import the project into Eclipse.
It was showing me many errors before, but I managed to get rid of some. I don't know how to get rid of this errors.
Below is the code for the activity.
public class MainActivity extends SherlockFragmentActivity {
DrawerLayout mDrawerLayout;
ListView mDrawerList;
ActionBarDrawerToggle mDrawerToggle;
private CharSequence mDrawerTitle;
private CharSequence mTitle;
private String[] mPlanetTitles;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTitle = mDrawerTitle = getTitle();
mPlanetTitles = getResources().getStringArray(R.array.planets_array);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerList = (ListView) findViewById(R.id.left_drawer);
// set a custom shadow that overlays the main content when the drawer
// opens
mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow,
GravityCompat.START);
// set up the drawer's list view with items and click listener
mDrawerList.setAdapter(new ArrayAdapter<String>(this,
R.layout.drawer_list_item, mPlanetTitles));
mDrawerList.setOnItemClickListener(new DrawerItemClickListener());
// enable ActionBar app icon to behave as action to toggle nav drawer
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
// ActionBarDrawerToggle ties together the the proper interactions
// between the sliding drawer and the action bar app icon
mDrawerToggle = new ActionBarDrawerToggle(this, /* host Activity */
mDrawerLayout, /* DrawerLayout object */
R.drawable.ic_drawer, /* nav drawer image to replace 'Up' caret */
R.string.drawer_open, /* "open drawer" description for accessibility */
R.string.drawer_close /* "close drawer" description for accessibility */
) {
public void onDrawerClosed(View view) {
getSupportActionBar().setTitle(mTitle);
invalidateOptionsMenu(); // creates call to
// onPrepareOptionsMenu()
}
public void onDrawerOpened(View drawerView) {
getSupportActionBar().setTitle(mDrawerTitle);
invalidateOptionsMenu(); // creates call to
// onPrepareOptionsMenu()
}
};
mDrawerLayout.setDrawerListener(mDrawerToggle);
if (savedInstanceState == null) {
selectItem(0);
}
}
#Override
public boolean onCreateOptionsMenu(com.actionbarsherlock.view.Menu menu) {
return super.onCreateOptionsMenu(menu);
}
#Override
public boolean onOptionsItemSelected(
com.actionbarsherlock.view.MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home: {
if (mDrawerLayout.isDrawerOpen(mDrawerList)) {
mDrawerLayout.closeDrawer(mDrawerList);
} else {
mDrawerLayout.openDrawer(mDrawerList);
}
break;
}
case R.id.action_contact:
// QuickContactFragment dialog = new QuickContactFragment();
// dialog.show(getSupportFragmentManager(), "QuickContactFragment");
// return true;
}
return super.onOptionsItemSelected(item);
}
// The click listener for ListView in the navigation drawer
private class DrawerItemClickListener implements
ListView.OnItemClickListener {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
selectItem(position);
}
}
#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 toggles
mDrawerToggle.onConfigurationChanged(newConfig);
}
private void selectItem(int position) {
switch (position) {
case 0:
getSupportFragmentManager()
.beginTransaction()
.add(R.id.content,
PageSlidingTabStripFragment.newInstance(),
PageSlidingTabStripFragment.TAG).commit();
break;
default:
SherlockFragment fragment = new PlanetFragment();
Bundle args = new Bundle();
args.putInt(PlanetFragment.ARG_PLANET_NUMBER, position);
fragment.setArguments(args);
getSupportFragmentManager().beginTransaction()
.add(R.id.content, fragment).commit();
break;
}
mDrawerLayout.closeDrawer(mDrawerList);
}
}
Any help is appreciated.
Thank you
This wasn't really hard. I was getting error, because I have having error in my xml files.