Develop Reference

I have created a wallpapers app using viewpager and urls of images but I am not able to set wallpapers I am placing my Urls in string

This is my mainactivity class and I am using my urls in the string. Anyone please tell me how to set wallpapers using multiple urls. I am using multiple urls to show in viewpager its working but I can't set wallpapers.
This is my main activity class.
I want to set wallpapers on floating button onclick listener
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
private String[] imageUrls = new String[]{
"https://i.jj.cc/MGTTwJ7Q/Ant-Man-474b00d1-4bdc-3ea6-88a3-1702c46f061c.jpg",
"https://i.jj.cc/SKvKN1dt/fdg-min.jpg",
"https://i.jj.cc/fLSR37gW/uhd-antman18-min.jpg",
"https://i.jj.cc/Gt0hvBZF/uhd-antman7-min.jpg",
"https://i.jj.cc/ryWpMJrQ/Antman-And-The-Wasp-d4a753af-1dd1-4df2-aeb6-d39c732fd16a.jpg",
"https://i.jj.cc/RVLVnZGt/uhd-antman21-min.jpg",
"https://i.jj.cc/t4RRdGmM/Ant-man-and-the-wasp-a294bb80-e6f9-41c1-bf46-07af64e3e348.jpg",
"https://i.jj.cc/y8f1vpMY/Antman-d8033f49-b33c-4cd4-b3ca-651417df20da.jpg",
"https://i.jj.cc/yNkV5XKh/Antman-Abstract-HD-05ef2c84-e5d3-41e9-afa1-1400c315bf06.jpg",
"https://i.jj.cc/8C91VJk2/IMG-0139.jpg",
"https://i.jj.cc/Znh4CGdj/antman-70390c1f-2d63-41ea-a487-e34668167e7e.jpg",
"https://i.jj.cc/vTLM907y/antman-2fde23ba-9eac-4f11-acf7-b872b9b71121.jpg",
"https://i.jj.cc/66dBDpkP/Antman-d353b93b-5c57-4363-ad92-4a974423d2b5.jpg",
"https://i.jj.cc/rFMqcLcw/Antman-df2e8adb-b0a0-42b6-ade7-38d041349ed1.jpg",
"https://i.jj.cc/YCSkGfvc/Antman-32cb0b83-f4b6-4a24-854a-913b593c0291.jpg",
"https://i.jj.cc/zGPNnbhy/razakbaap49.jpg",
"https://i.jj.cc/tgZjDqd2/antman05-uhd.jpg"
};
private int indexOfImage = 0;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.addDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
ViewPager viewPager = findViewById(R.id.view_pager);
ViewPagerAdapter adapter = new ViewPagerAdapter(this, imageUrls);
viewPager.setAdapter(adapter);
viewPager.setOnPageChangeListener(new MyPageChangeListener());
FloatingActionButton floatingActionButton = (FloatingActionButton)findViewById(R.id.fab);
floatingActionButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
}
});
}
#Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
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 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);
}
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_camera) {
// Handle the camera action
} else if (id == R.id.nav_gallery) {
} else if (id == R.id.nav_slideshow) {
} else if (id == R.id.nav_manage) {
} else if (id == R.id.nav_share) {
} else if (id == R.id.nav_send) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
private class MyPageChangeListener implements ViewPager.OnPageChangeListener {
#Override
public void onPageScrolled(int i, float v, int i1) {
}
#Override
public void onPageSelected(int i) {
MainActivity.this.indexOfImage = i;
}
#Override
public void onPageScrollStateChanged(int i) {
}
}
}
This is my viewpager adapter class
public class ViewPagerAdapter extends PagerAdapter {
private Context context;
private String[] imageUrls;
ViewPagerAdapter(Context context, String[] imageUrls) {
this.context = context;
this.imageUrls = imageUrls;
}
#Override
public int getCount() {
return imageUrls.length;
}
#Override
public boolean isViewFromObject(#NonNull View view, #NonNull Object object) {
return view == object;
}
#NonNull
#Override
public Object instantiateItem(#NonNull ViewGroup container, int position) {
ImageView imageView = new ImageView(context);
Picasso.with(context)
.load(imageUrls[position])
.fit()
.centerCrop()
.error(R.drawable.ic_error_outline_black_24dp)
.into(imageView);
container.addView(imageView);
return imageView;
}
#Override
public void destroyItem(#NonNull ViewGroup container, int position, #NonNull Object object) {
container.removeView((View) object);
}
}

Add permission in manifest
<uses-permission android:name="android.permission.SET_WALLPAPER"/>
Add this AsyncTask class in your MainActivity
public class SetWallpaper extends AsyncTask<String, Void, Bitmap> {
ProgressDialog progressDialog = new ProgressDialog(MainActivity.this);
#Override
protected Bitmap doInBackground(String... params) {
Bitmap bitmap = null;
try {
bitmap = Picasso.get().load(params[0]).get();
} catch (IOException e) {
e.printStackTrace();
}
return result;
}
#Override
protected void onPostExecute (Bitmap result) {
super.onPostExecute(result);
WallpaperManager wallpaperManager = WallpaperManager.getInstance(getBaseContext());
try {
wallpaperManager.setBitmap(result);
progressDialog.dismiss();
Toast.makeText(getApplicationContext(), "Wallpaper changed", Toast.LENGTH_SHORT).show();
} catch (IOException ex) {
ex.printStackTrace();
}
}
#Override
protected void onPreExecute () {
super.onPreExecute();
progressDialog = new ProgressDialog(MainActivity.this);
progressDialog.setMessage("Loading image...");
progressDialog.setCancelable(false);
progressDialog.show();
}
}
Then try
floatingActionButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
SetWallpaper sw = new SetWallpaper();
sw.execute(imageUrls[indexOfImage])
}
});

RecycleView on Fragment using Custom Adapter with Retrofit

public class AgentAdapter extends RecyclerView.Adapter<AgentAdapter.CustomViewHolder> {
private List<Agent> agentList;
private Context mContext;
public AgentAdapter(Context context, List<Agent> agentList) {
this.agentList= agentList;
this.mContext = context;
}
#Override
public CustomViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.agent_row, null);
CustomViewHolder viewHolder = new CustomViewHolder(view);
return viewHolder;
}
#Override
public void onBindViewHolder(CustomViewHolder customViewHolder, int i) {
final Agent agent = agentList.get(i);
//Setting text view title
customViewHolder.textViewAgentName.setText(agent.getAgentName());
customViewHolder.textViewAgentPhone.setText(agent.getAgentPhone());
customViewHolder.textViewAgentRegion.setText(agent.getRegion());
customViewHolder.textViewAgentStatus.setText(agent.getAgentStatus());
View.OnClickListener listener = new View.OnClickListener() {
#Override
public void onClick(View v) {
onItemClickListener.onItemClick(agent);
}
};
customViewHolder.textViewAgentName.setOnClickListener(listener);
}
#Override
public int getItemCount() {
return (null != agentList ? agentList.size() : 0);
}
public void updateAnswers(List<Agent>agent ) {
agentList = agent;
notifyDataSetChanged();
}
class CustomViewHolder extends RecyclerView.ViewHolder {
protected TextView textViewAgentName;
protected TextView textViewAgentPhone;
protected TextView textViewAgentRegion;
protected TextView textViewAgentStatus;
public CustomViewHolder(View view) {
super(view);
this.textViewAgentName = (TextView) view.findViewById(R.id.textAgentName);
this.textViewAgentPhone= (TextView) view.findViewById(R.id.textAgentPhone);
this.textViewAgentRegion = (TextView) view.findViewById(R.id.textAgentRegion);
this.textViewAgentStatus = (TextView) view.findViewById(R.id.textAgentStatus);
}
}
private OnItemClickListener onItemClickListener;
public OnItemClickListener getOnItemClickListener() {
return onItemClickListener;
}
public void setOnItemClickListener(OnItemClickListener onItemClickListener) {
this.onItemClickListener = onItemClickListener;
}
That's my fragment and this is my Adapter
public class AgentAdapter extends RecyclerView.Adapter<AgentAdapter.CustomViewHolder> {
private List<Agent> agentList;
private Context mContext;
public AgentAdapter(Context context, List<Agent> agentList) {
this.agentList= agentList;
this.mContext = context;
}
#Override
public CustomViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.agent_row, null);
CustomViewHolder viewHolder = new CustomViewHolder(view);
return viewHolder;
}
#Override
public void onBindViewHolder(CustomViewHolder customViewHolder, int i) {
final Agent agent = agentList.get(i);
//Setting text view title
customViewHolder.textViewAgentName.setText(agent.getAgentName());
customViewHolder.textViewAgentPhone.setText(agent.getAgentPhone());
customViewHolder.textViewAgentRegion.setText(agent.getRegion());
customViewHolder.textViewAgentStatus.setText(agent.getAgentStatus());
View.OnClickListener listener = new View.OnClickListener() {
#Override
public void onClick(View v) {
onItemClickListener.onItemClick(agent);
}
};
customViewHolder.textViewAgentName.setOnClickListener(listener);
}
#Override
public int getItemCount() {
return (null != agentList ? agentList.size() : 0);
}
public void updateAnswers(List<Agent>agent ) {
agentList = agent;
notifyDataSetChanged();
}
class CustomViewHolder extends RecyclerView.ViewHolder {
protected TextView textViewAgentName;
protected TextView textViewAgentPhone;
protected TextView textViewAgentRegion;
protected TextView textViewAgentStatus;
public CustomViewHolder(View view) {
super(view);
this.textViewAgentName = (TextView) view.findViewById(R.id.textAgentName);
this.textViewAgentPhone= (TextView) view.findViewById(R.id.textAgentPhone);
this.textViewAgentRegion = (TextView) view.findViewById(R.id.textAgentRegion);
this.textViewAgentStatus = (TextView) view.findViewById(R.id.textAgentStatus);
}
}
private OnItemClickListener onItemClickListener;
public OnItemClickListener getOnItemClickListener() {
return onItemClickListener;
}
public void setOnItemClickListener(OnItemClickListener onItemClickListener) {
this.onItemClickListener = onItemClickListener;
}
and this is my MainActivity
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.addDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
//add this line to display menu1 when the activity is loaded
displaySelectedScreen(R.id.nav_menu2);
}
#Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
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 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);
}
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(MenuItem item) {
displaySelectedScreen(item.getItemId());
return true;
}
private void displaySelectedScreen(int itemId) {
//creating fragment object
Fragment fragment = null;
//initializing the fragment object which is selected
switch (itemId) {
case R.id.nav_menu1:
fragment = new caseFragment();
break;
case R.id.nav_menu2:
fragment = new testFragment();
break;
}
//replacing the fragment
if (fragment != null) {
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
ft.replace(R.id.content_frame, fragment);
ft.commit();
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
}
when i tried to open my fragment, the app crashed and the logcat is blank.
previously i could show my json data from activity but now when i tried to use fragment instead, it crashed.
Im using java and android studio.
Anyone know why? Thx in advance.

How can display ListView if I click on NavigationDrawer [duplicate]

I want to build an android application with a Fragment which contains a List of Option and if I click on one of this option, I can see, another fragment with other option.
So I build this:
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".activity.MainActivity"
tools:ignore="MergeRootFrame" >
<FrameLayout
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<LinearLayout
android:layout_width="480dp"
android:layout_height="match_parent"
android:layout_gravity="start"
tools:layout="#layout/fragment_navigation_drawer" >
<ListView
android:id="#+id/left_list"
android:layout_width="240dp"
android:layout_height="match_parent"
android:background="#6dc659"
android:foreground="#color/white">
</ListView>
<fragment
android:id="#+id/navigation_drawer"
android:name="it.eresult.decipher.fragment.NavigationDrawerFragment"
android:layout_width="240dp"
android:layout_height="match_parent"
android:layout_gravity="start"
tools:layout="#layout/fragment_navigation_drawer" />
</LinearLayout>
</android.support.v4.widget.DrawerLayout>
This is the MainActivity.java
public class MainActivity extends ActionBarActivity implements NavigationDrawerFragment.NavigationDrawerCallbacks{
private DrawerLayout drawer;
private ListView leftList;
private String[] leftListStrings;
private String[] rightListStrings;
private NavigationDrawerFragment mNavigationDrawerFragment;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
leftList = (ListView) findViewById(R.id.left_list);
leftListStrings = getResources().getStringArray(R.array.principal_menu);
leftList.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,leftListStrings));
mNavigationDrawerFragment = (NavigationDrawerFragment)
getSupportFragmentManager().findFragmentById(R.id.navigation_drawer);
mNavigationDrawerFragment.setUp(
R.id.navigation_drawer,
(DrawerLayout) findViewById(R.id.drawer_layout));
leftList.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
arg1.setBackgroundColor(getResources().getColor(R.color.selected_menu_option));
if(arg2 == 0){
}
}
});
drawer.setDrawerListener(new DrawerLayout.DrawerListener() {
#Override
public void onDrawerStateChanged(int arg0) {
// TODO Auto-generated method stub
}
#Override
public void onDrawerSlide(View arg0, float arg1) {
// TODO Auto-generated method stub
}
#Override
public void onDrawerOpened(View arg0) {
// TODO Auto-generated method stub
}
#Override
public void onDrawerClosed(View arg0) {
// TODO Auto-generated method stub
//rightList.setVisibility(View.INVISIBLE);
}
});
}
#Override
public void onNavigationDrawerItemSelected(int position) {
//TODO
}
class MayAdapter extends ArrayAdapter<String>{
List<String> myList = null;
public MayAdapter(Context context, int resource, List<String> objects) {
super(context, resource, objects);
myList = objects;
}
public List<String> getMyList() {
return myList;
}
public void setMyList(List<String> myList) {
this.myList = myList;
}
}
public void restoreActionBar() {
ActionBar actionBar = getSupportActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
actionBar.setDisplayShowTitleEnabled(true);
actionBar.setTitle("omnia");
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
return super.onCreateOptionsMenu(menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
return super.onOptionsItemSelected(item);
}
}
This is NavigationDrawerFragment.java
public class NavigationDrawerFragment extends Fragment {
private static final String STATE_SELECTED_POSITION = "selected_navigation_drawer_position";
private NavigationDrawerCallbacks mCallbacks;
private ActionBarDrawerToggle mDrawerToggle;
private DrawerLayout mDrawerLayout;
private ListView mDrawerListView;
private View mFragmentContainerView;
private int mCurrentSelectedPosition = 0;
Toolbar toolBar;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (savedInstanceState != null) {
mCurrentSelectedPosition = savedInstanceState.getInt(STATE_SELECTED_POSITION);
}
// Select the default item.
selectItem(mCurrentSelectedPosition);
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
// the fragment has menu items to contribute
setHasOptionsMenu(true);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
mDrawerListView = (ListView) inflater.inflate(
R.layout.fragment_navigation_drawer, container, false);
mDrawerListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView parent, View view, int position, long id) {
selectItem(position);
}
});
mDrawerListView.setAdapter(new ArrayAdapter(
getActionBar().getThemedContext(),
android.R.layout.simple_list_item_activated_1,
android.R.id.text1,
new String[]{
getString(R.string.social_history),
getString(R.string.encounter),
getString(R.string.problems),
}));
mDrawerListView.setItemChecked(mCurrentSelectedPosition, true);
return mDrawerListView;
}
private ActionBar getActionBar() {
return ((AppCompatActivity) getActivity()).getSupportActionBar();
}
public boolean isDrawerOpen() {
return mDrawerLayout != null && mDrawerLayout.isDrawerOpen(mFragmentContainerView);
}
public void setUp(int fragmentId, DrawerLayout drawerLayout) {
mFragmentContainerView = getActivity().findViewById(fragmentId);
mDrawerLayout = drawerLayout;
// 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
ActionBar actionBar = getActionBar();
actionBar.setDisplayHomeAsUpEnabled(true);
actionBar.setHomeButtonEnabled(true);
// ActionBarDrawerToggle ties together the the proper interactions
// between the navigation drawer and the action bar app icon.
mDrawerToggle = new ActionBarDrawerToggle(
getActivity(),
mDrawerLayout,
null,
R.string.navigation_drawer_open,
R.string.navigation_drawer_close
) {
#Override
public void onDrawerClosed(View drawerView) {
super.onDrawerClosed(drawerView);
if (!isAdded()) {
return;
}
getActivity().supportInvalidateOptionsMenu();
}
#Override
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
if (!isAdded()) {
return;
}
getActivity().supportInvalidateOptionsMenu();
}
};
mDrawerLayout.post(new Runnable() {
#Override
public void run() {
mDrawerToggle.syncState();
}
});
mDrawerLayout.setDrawerListener(mDrawerToggle);
mDrawerToggle.setDrawerIndicatorEnabled(true);
}
private void selectItem(int position) {
mCurrentSelectedPosition = position;
if (mDrawerListView != null) {
mDrawerListView.setItemChecked(position, true);
}
if (mDrawerLayout != null) {
mDrawerLayout.closeDrawer(mFragmentContainerView);
}
if (mCallbacks != null) {
mCallbacks.onNavigationDrawerItemSelected(position);
}
}
#Override
public void onAttach(Activity activity) {
super.onAttach(activity);
try {
mCallbacks = (NavigationDrawerCallbacks) activity;
} catch (ClassCastException e) {
throw new ClassCastException("Activity must implement NavigationDrawerCallbacks.");
}
}
#Override
public void onDetach() {
super.onDetach();
mCallbacks = null;
}
#Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putInt(STATE_SELECTED_POSITION, mCurrentSelectedPosition);
}
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
mDrawerToggle.onConfigurationChanged(newConfig);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
public static interface NavigationDrawerCallbacks {
void onNavigationDrawerItemSelected(int position);
}
}
With this code, if I try to run my application, I can see the complete menu like this
Instead, I want to see only the left menu, and if I click on one items, see the right menu

multi tasking in android

i get the Choreographer error The application may be doing too much work on its main thread.
In my main activity each time i launch the app or get back to the main activity.
From what i understand there's to many work to be done on one core (because i'm not using threads), so i have to find a solution which probably evolves threads and AsyncTask.
I was trying to figure out what exactly cause the cpu put his effort but i couldn't figure it out by myself.
Here's the code of the main activity which includes a navigation drawer:
public class MainActivity extends ActionBarActivity
implements View.OnClickListener {
private Animation animAlpha;
private Animation animRotate;
private MediaPlayer background_music;
static int is_login = 0;
private boolean isOpen = false;
private DrawerLayout mDrawerLayout;
private ActionBarDrawerToggle mDrawerToggle;
private CharSequence mDrawerTitle;
private CharSequence mTitle;
private ViewFlipper flipper;
ImageButton messages,weekly_day_times,shabat_times,events;
private ViewGroup mContainerView1,mContainerView2,mContainerView3,mContainerView4;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
animAlpha = AnimationUtils.loadAnimation(this, R.anim.anim_alpha);
animRotate = AnimationUtils.loadAnimation(this, R.anim.anim_rotate);
background_music = MediaPlayer.create(this, R.raw.yedid_nefesh);
flipper = (ViewFlipper) findViewById(R.id.viewFlipper);
startFlipper();
background_music.start();
messages = (ImageButton) findViewById(R.id.messages_button);
weekly_day_times = (ImageButton) findViewById(R.id.weekly_times_button);
shabat_times = (ImageButton) findViewById(R.id.sat_times_button);
events = (ImageButton) findViewById(R.id.events_button);
messages.setOnClickListener(this);
weekly_day_times.setOnClickListener(this);
shabat_times.setOnClickListener(this);
events.setOnClickListener(this);
mContainerView1 = (ViewGroup) findViewById(R.id.add_shabat_container);
mContainerView2 = (ViewGroup) findViewById(R.id.add_weekly_container);
mContainerView3 = (ViewGroup) findViewById(R.id.add_messages_container);
mContainerView4 = (ViewGroup) findViewById(R.id.add_events_container);
findViewById(R.id.b_shabat_add).setOnClickListener(this);
findViewById(R.id.b_weekly_add).setOnClickListener(this);
findViewById(R.id.b_messages_add).setOnClickListener(this);
findViewById(R.id.b_events_add).setOnClickListener(this);
IntializeNavDrawer();
}
#Override
public void onWindowFocusChanged(boolean hasFocus) {
super.onWindowFocusChanged(hasFocus);
setButtonsAnimation(messages);
setButtonsAnimation(weekly_day_times);
setButtonsAnimation(shabat_times);
setButtonsAnimation(events);
}
private void setButtonsAnimation(ImageButton button) {
int rand = (int)(Math.random()*700);
Animation hyperspaceJump = AnimationUtils.loadAnimation(this, R.anim.hyperspace_jump);
hyperspaceJump.setStartOffset(rand);
button.startAnimation(hyperspaceJump);
}
/*
Initialize all list views in navigation drawer.
Handles actions of open or close drawer.
*/
private void IntializeNavDrawer() {
mTitle = mDrawerTitle = getTitle();
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow,
GravityCompat.START);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
null, R.string.drawer_open,
R.string.drawer_close) {
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);
}
/*
Initialize properties and start the background flipper
*/
private void startFlipper() {
flipper.setFlipInterval(5000);
flipper.setInAnimation(AnimationUtils.loadAnimation(this,
android.R.anim.fade_in));
flipper.setOutAnimation(AnimationUtils.loadAnimation(this,
android.R.anim.fade_out));
flipper.startFlipping();
}
#Override
protected void onResume() {
super.onResume();
flipper.startFlipping();
background_music.start();
}
#Override
public void setTitle(CharSequence title) {
mTitle = title;
getSupportActionBar().setTitle(mTitle);
}
#Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
// Sync the toggle state after onRestoreInstanceState has occurred.
mDrawerToggle.syncState();
}
#Override
public void onClick(View v) {
Intent i;
switch(v.getId())
{
case R.id.messages_button: {
i = new Intent(com.example.neotavraham.MainActivity.this, Messages.class);
startActivity(i);
return;
}
case R.id.sat_times_button: {
i = new Intent(com.example.neotavraham.MainActivity.this, ShabatPrays.class);
startActivity(i);
return;
}
case R.id.weekly_times_button: {
i = new Intent(com.example.neotavraham.MainActivity.this, WeeklyPrays.class);
startActivity(i);
return;
}
case R.id.events_button: {
i = new Intent(com.example.neotavraham.MainActivity.this, Events.class);
startActivity(i);
return;
}
case R.id.b_shabat_add:
if(isOpen){
removeItem(mContainerView1);
isOpen = false;
}else {
addItem(mContainerView1,R.layout.nav_drawer_l_changes_item_1);
isOpen =true;
}
return;
case R.id.b_weekly_add:
if(isOpen){
removeItem(mContainerView2);
isOpen = false;
}else {
addItem(mContainerView2,R.layout.nav_drawer_l_changes_item_1);
isOpen =true;
}
return;
case R.id.b_messages_add:
if(isOpen){
removeItem(mContainerView3);
isOpen = false;
}else {
addItem(mContainerView3,R.layout.nav_drawer_l_changes_item_2);
isOpen =true;
}
return;
case R.id.b_events_add:
if(isOpen){
removeItem(mContainerView4);
isOpen = false;
}else {
addItem(mContainerView4,R.layout.nav_drawer_l_changes_item_2);
isOpen =true;
}
return;
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
return super.onCreateOptionsMenu(menu);
}
#SuppressLint("NewApi")
#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;
}
return false;
}
#Override
protected void onStop() {
super.onStop();
background_music.pause();
flipper.stopFlipping();
}
/**** Method for Setting the Height of the ListView dynamically.
**** Hack to fix the issue of not showing all the items of the ListView
**** when placed inside a ScrollView ****/
public static void setListViewHeightBasedOnChildren(ListView listView) {
ListAdapter listAdapter = listView.getAdapter();
if (listAdapter == null)
return;
int desiredWidth = View.MeasureSpec.makeMeasureSpec(listView.getWidth(), View.MeasureSpec.UNSPECIFIED);
int totalHeight = 0;
View view = null;
for (int i = 0; i < listAdapter.getCount(); i++) {
view = listAdapter.getView(i, view, listView);
if (i == 0) {
view.setLayoutParams(new ViewGroup.LayoutParams(desiredWidth, AbsListView.LayoutParams.WRAP_CONTENT));
}
view.measure(desiredWidth, View.MeasureSpec.UNSPECIFIED);
totalHeight += view.getMeasuredHeight();
}
ViewGroup.LayoutParams params = listView.getLayoutParams();
params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() - 1));
listView.setLayoutParams(params);
listView.requestLayout();
}
private void addItem(ViewGroup mContainerView,int layout) {
// Instantiate a new "row" view.
final ViewGroup newView = (ViewGroup) LayoutInflater.from(this).inflate(
layout, mContainerView, false);
// Because mContainerView has android:animateLayoutChanges set to true,
// adding this view is automatically animated.
mContainerView.addView(newView, 2);
}
public void removeItem(ViewGroup mContainerView){
mContainerView.removeViewAt(2);
}
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
// Pass any configuration change to the drawer toggles
mDrawerToggle.onConfigurationChanged(newConfig);
}
}
Also here are puctures with and withougt the navigation bar:
I was hoping you will show me what cuase to that error and an example on how should i get over it.
thank you

Here is some information from the Android documentation site about multi-threading.
https://developer.android.com/training/multiple-threads/index.html
http://developer.android.com/guide/components/processes-and-threads.html
http://developer.android.com/guide/faq/commontasks.html#threading
You can look around the web for more tutorials.

The method setOnPageChangeListener(ViewPager.SimpleOnPageChangeListener) is undefined for the type Home.ImagePagerAdapter

This is my first experience building something with ViewPager and I need a bit of help. I'm attempting to implement a solution found here:
ViewPager.SimpleOnPageChangeListener Does Not Function
However when I attempt to do so - I end up with the following:
The method setOnPageChangeListener(ViewPager.SimpleOnPageChangeListener) is undefined for the type Home.ImagePagerAdapter line 173: setOnPageChangeListener(mPageChangeListener);}
Cannot reference a field before it is defined Home.java line 173: setOnPageChangeListener(mPageChangeListener);}
Constructor call must be the first statement in a constructor line 171: super();
SOURCE:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.home);
final ActionBar actionBar = getActionBar();
ViewPager viewPager = (ViewPager) findViewById(R.id.view_pager);
ImagePagerAdapter adapter = new ImagePagerAdapter();
viewPager.setAdapter(adapter);
actionBar.setCustomView(R.layout.actionbar_custom_view_home);
actionBar.setDisplayShowTitleEnabled(false);
actionBar.setDisplayShowCustomEnabled(true);
drawerListViewItems = getResources().getStringArray(R.array.items);
drawerListView = (ListView) findViewById(R.id.left_drawer);
drawerListView.setAdapter(new ArrayAdapter<String>(this,
R.layout.drawer_listview_item, drawerListViewItems));
drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
actionBarDrawerToggle = new ActionBarDrawerToggle(this, /* host Activity */
drawerLayout, /* DrawerLayout object */
R.drawable.ic_drawer, /* nav drawer icon to replace 'Up' caret */
R.string.drawer_open, /* "open drawer" description */
R.string.drawer_close /* "close drawer" description */
);
drawerLayout.setDrawerListener(actionBarDrawerToggle);
getActionBar().setDisplayHomeAsUpEnabled(true);
drawerLayout.setDrawerShadow(R.drawable.drawer_shadow,
GravityCompat.START);
mainScrollView = (ScrollView) findViewById(R.id.groupScrollView);
listView = (VideosListView) findViewById(R.id.videosListView);
listView.setOnVideoClickListener(this);
new GetYouTubeUserVideosTask(responseHandler, PLAYLIST).execute();
}
Handler responseHandler = new Handler() {
#Override
public void handleMessage(Message msg) {
populateListWithVideos(msg);
};
};
private void populateListWithVideos(Message msg) {
Library lib = (Library) msg.getData().get(
GetYouTubeUserVideosTask.LIBRARY);
listView.setVideos(lib.getVideos());
}
#Override
protected void onStop() {
responseHandler = null;
super.onStop();
}
#Override
public void onVideoClicked(Video video) {
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setData(Uri.parse(video.getUrl()));
startActivity(intent);
}
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
actionBarDrawerToggle.onConfigurationChanged(newConfig);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu items for use in the action bar
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main, menu);
return super.onCreateOptionsMenu(menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if (actionBarDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
private class ImagePagerAdapter extends PagerAdapter {{
super();
setOnPageChangeListener(mPageChangeListener);}
private int[] mImages = new int[] { R.drawable.selstation_up_btn,
R.drawable.classical_up_btn, R.drawable.country_up_btn,
R.drawable.dance_up_btn, R.drawable.hiphop_up_btn };
#Override
public int getCount() {
return mImages.length;
}
#Override
public boolean isViewFromObject(View view, Object object) {
return view == ((ImageView) object);
}
#Override
public Object instantiateItem(ViewGroup container, int position) {
Context context = Home.this;
ImageView imageView = new ImageView(context);
imageView.setImageResource(mImages[position]);
((ViewPager) container).addView(imageView, 0);
return imageView;
}
#Override
public void destroyItem(ViewGroup container, int position, Object object) {
((ViewPager) container).removeView((ImageView) object);
}
private final ViewPager.SimpleOnPageChangeListener mPageChangeListener = new ViewPager.SimpleOnPageChangeListener() {
#Override
public void onPageSelected(final int position) {
onTabChanged(mPager.getAdapter(), mCurrentTabPosition, position);
mCurrentTabPosition = position;
}
};
protected void onTabChanged(final PagerAdapter adapter, final int oldPosition, final int newPosition) {
if (oldPosition>newPosition){
}
else{
String PLAYLIST = "idconex";
View vg = findViewById (R.layout.home);
vg.invalidate();
}
}
}
}
EDIT:
public class Home extends YouTubeBaseActivity implements
VideoClickListener {
private VideosListView listView;
private ActionBarDrawerToggle actionBarDrawerToggle;
public static final String API_KEY = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
public static final String VIDEO_ID = "o7VVHhK9zf0";
private int mCurrentTabPosition = NO_CURRENT_POSITION;
private static final int NO_CURRENT_POSITION = -1;
private DrawerLayout drawerLayout;
private ListView drawerListView;
private String[] drawerListViewItems;
private ViewPager mPager;
ScrollView mainScrollView;
Button fav_up_btn1;
Button fav_dwn_btn1;
String TAG = "DEBUG THIS";
String PLAYLIST = "idconex";
private OnPageChangeListener mPageChangeListener;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.home);
final ActionBar actionBar = getActionBar();
ViewPager viewPager = (ViewPager) findViewById(R.id.view_pager);
ImagePagerAdapter adapter = new ImagePagerAdapter();
viewPager.setAdapter(adapter);
actionBar.setCustomView(R.layout.actionbar_custom_view_home);
actionBar.setDisplayShowTitleEnabled(false);
actionBar.setDisplayShowCustomEnabled(true);
drawerListViewItems = getResources().getStringArray(R.array.items);
drawerListView = (ListView) findViewById(R.id.left_drawer);
drawerListView.setAdapter(new ArrayAdapter<String>(this,
R.layout.drawer_listview_item, drawerListViewItems));
drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
actionBarDrawerToggle = new ActionBarDrawerToggle(this, /* host Activity */
drawerLayout, /* DrawerLayout object */
R.drawable.ic_drawer, /* nav drawer icon to replace 'Up' caret */
R.string.drawer_open, /* "open drawer" description */
R.string.drawer_close /* "close drawer" description */
);
drawerLayout.setDrawerListener(actionBarDrawerToggle);
getActionBar().setDisplayHomeAsUpEnabled(true);
drawerLayout.setDrawerShadow(R.drawable.drawer_shadow,
GravityCompat.START);
mainScrollView = (ScrollView) findViewById(R.id.groupScrollView);
listView = (VideosListView) findViewById(R.id.videosListView);
listView.setOnVideoClickListener(this);
new GetYouTubeUserVideosTask(responseHandler, PLAYLIST).execute();
}
Handler responseHandler = new Handler() {
#Override
public void handleMessage(Message msg) {
populateListWithVideos(msg);
};
};
private void populateListWithVideos(Message msg) {
Library lib = (Library) msg.getData().get(
GetYouTubeUserVideosTask.LIBRARY);
listView.setVideos(lib.getVideos());
}
#Override
protected void onStop() {
responseHandler = null;
super.onStop();
}
#Override
public void onVideoClicked(Video video) {
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setData(Uri.parse(video.getUrl()));
startActivity(intent);
}
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
actionBarDrawerToggle.onConfigurationChanged(newConfig);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu items for use in the action bar
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main, menu);
return super.onCreateOptionsMenu(menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if (actionBarDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
private class ImagePagerAdapter extends PagerAdapter {
public ImagePagerAdapter()
{
super();
setOnPageChangeListener(mPageChangeListener);
}
private int[] mImages = new int[] { R.drawable.selstation_up_btn,
R.drawable.classical_up_btn, R.drawable.country_up_btn,
R.drawable.dance_up_btn, R.drawable.hiphop_up_btn };
#Override
public int getCount() {
return mImages.length;
}
#Override
public boolean isViewFromObject(View view, Object object) {
return view == ((ImageView) object);
}
#Override
public Object instantiateItem(ViewGroup container, int position) {
Context context = Home.this;
ImageView imageView = new ImageView(context);
imageView.setImageResource(mImages[position]);
((ViewPager) container).addView(imageView, 0);
return imageView;
}
#Override
public void destroyItem(ViewGroup container, int position, Object object) {
((ViewPager) container).removeView((ImageView) object);
}
private final ViewPager.SimpleOnPageChangeListener mPageChangeListener = new ViewPager.SimpleOnPageChangeListener() {
#Override
public void onPageSelected(final int position) {
onTabChanged(mPager.getAdapter(), mCurrentTabPosition, position);
mCurrentTabPosition = position;
}
};
protected void onTabChanged(final PagerAdapter adapter, final int oldPosition, final int newPosition) {
//Calc if swipe was left to right, or right to left
if (oldPosition>newPosition){
// left to right
}
else{
//right to left
String PLAYLIST = "idconex";
View vg = findViewById (R.layout.home);
vg.invalidate();
}
final ViewPager viewPager = (ViewPager) findViewById(R.id.view_pager);
viewPager.setOnPageChangeListener(new OnPageChangeListener() {
int oldPos = viewPager.getCurrentItem();
#Override
public void onPageScrolled(int position, float arg1, int arg2) {
if(position > oldPos) {
//Moving to the right
} else if(position < oldPos) {
//Moving to the Left
}
}
#Override
public void onPageScrollStateChanged(int arg0) {
// TODO Auto-generated method stub
}
#Override
public void onPageSelected(int arg0) {
// TODO Auto-generated method stub
}
});
}}}

The problem with your code (or at least current code) is you don't have a constructor. Instead, you just have a super call sitting out in the middle of nowhere. And you have two opening curly brackets({) after the class declaration which is strange but I think that's because you don't understand the constructor in Java.
Try changing it to look more like
private class ImagePagerAdapter extends PagerAdapter {
// this is your constructor
public ImagePagerAdapter()
{
super();
setOnPageChangeListener(mPageChangeListener);
}
This change will most likely take care of all 3 of those errors.
You should consider going through a good tutorial and the docs below.
ViewPager Docs
Also, it is important that you know what constructors are which you can learn about Here in the Java Docs