Warum funktioniert Network Change Listener nicht in meiner App?

Question

Ich möchte Netzwerkänderung Listener in meiner App archivieren. Beispiel: Wenn ich meine App ohne ON Mobile Data und Wifi starte, wird "Network unavailable!" Angezeigt. Danach wenn ich ON Wifi oder Mobile Data als das es automatisch Daten online und auf der Benutzeroberfläche anzeigen.

Ich habe Main-Aktivität, die bereits erweitert Fragment implementiert Schnittstelle sowie Basis-Fragment zu. Ich habe Broadcast Receiver versucht, aber es funktioniert nicht. Wenn ich App ohne Netzwerk starte, zeigt es zwei Mal keine Internetverbindung. Und nach Wifi ON nicht automatisch aktualisieren, aber wenn ich im Menü auf andere Option klickte, dann UI zeigt. Bitte helfen Sie mir ...

1- Hauptaktivität

public class MainActivity extends AppCompatActivity implements BaseFragment.OnFragmentInteractionListener{ 

    private Realm realm; 
    private Results results; 
    RecycleAdapter recyclerAdapter; 
    BroadcastReceiver receiver; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); 
     setSupportActionBar(toolbar); 
     RealmConfiguration realmConfiguration = new RealmConfiguration.Builder 
       (MainActivity.this) 
       .build(); 
     Realm.setDefaultConfiguration(realmConfiguration); 
    } 


    @Override 
    public void onTabletListener(Results result) { 
     DetailFragment detailFragment = (DetailFragment) getFragmentManager() 
       .findFragmentById(R.id.fragment_detail); 

     if (detailFragment != null) { 
      detailFragment.updateTabletUI(result); 
     } 
    } 

    @Override 
    public void onFragmentInteraction(Results currentMovie) { 
     DetailFragment detailFragment = (DetailFragment) getFragmentManager() 
       .findFragmentById(R.id.fragment_detail); 

     if (detailFragment == null) { 
      Intent intent = new Intent(this, DetailActivity.class) 
        .putExtra("movie_Id", currentMovie.getId()) 
        .putExtra("movie_Name", currentMovie.getTitle()) 
        .putExtra("poster_Path", currentMovie.getPoster_path()) 
        .putExtra("back_poster_Path", currentMovie.getBackdrop_path()) 
        .putExtra("release_Date", currentMovie.getRelease_date()) 
        .putExtra("users_Rating", currentMovie.getVote_average()) 
        .putExtra("overview", currentMovie.getOverview()); 
      startActivity(intent); 
     } else { 
      detailFragment.updateTabletUI(currentMovie); 
     } 
    } 

    @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.favoriteList) { 
      Intent intent=new Intent(MainActivity.this, FavoriteActivity.class); 
      startActivity(intent); 
     } 
     return super.onOptionsItemSelected(item); 
    } 
} 

2- Basis Fragment Klasse

public class BaseFragment extends android.app.Fragment implements RecycleAdapter.GetDataFromAdapter { 

    @Bind(R.id.recyclerView) 
    RecyclerView recyclerView; 
    private static final String STATE_MOVIES = "state_movies"; 
    private View rootView, noView; 
    private DataManager dataManager; 
    private RecycleAdapter recyclerAdapter; 
    private MovieResponse movieResponse; 
    private List<Results> resultsList; 

    private Results results; 
    private OnFragmentInteractionListener mListener; 
    private int menuItemPosition; 
    private BroadcastReceiver receiver; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setHasOptionsMenu(true); 
    } 

    @Override 
    public void onSaveInstanceState(Bundle outState) { 
     super.onSaveInstanceState(outState); 
     outState.putParcelableArrayList(STATE_MOVIES, (ArrayList<? extends Parcelable>) resultsList); 
     outState.putInt("menu_item", menuItemPosition); 
    } 

    @Override 
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { 
     super.onCreateOptionsMenu(menu, inflater); 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     switch (item.getItemId()){ 
      case R.id.most_Popular: 
       if(item.isChecked()){ 
       }else{ 
        item.setChecked(true); 
        menuItemPosition = item.getItemId(); 
        makeService("POPULAR"); 
        return true; 
       } 
      case R.id.high_rated: 
       if(item.isChecked()){ 
       }else{ 
        item.setChecked(true); 
        menuItemPosition = item.getItemId(); 
        makeService("TOP"); 
        return true; 
       } 
     } 
     return super.onOptionsItemSelected(item); 
    } 

    @Override 
    public void onPrepareOptionsMenu(Menu menu) { 
     super.onPrepareOptionsMenu(menu); 
     // this will get called when the activity is re-created on device configuration change 
     menu.findItem(menuItemPosition).setChecked(true); 
    } 



    @Nullable 
    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
     rootView = inflater.inflate(R.layout.fragment_base, container, false);    

     ButterKnife.bind(this, rootView); 
     resultsList=new ArrayList<Results>(); 
     configRecycleView(); 

     if (savedInstanceState==null){ 
      receiver=new BroadcastReceiver() { 
       @Override 
       public void onReceive(Context context, Intent intent) { 
       int status= NetworkStatus.getConnectivityStatus(context); 
       if (status==0){ 
       }else{ 
        makeService("POPULAR"); 
       } 
       } 
      }; 
      menuItemPosition = R.id.most_Popular; 
     }else{ 
      resultsList=savedInstanceState.getParcelableArrayList(STATE_MOVIES); 
      menuItemPosition = savedInstanceState.getInt("menu_item"); 
      recyclerAdapter.addMovieList(resultsList); 
     } 
     return rootView; 
    } 

    private void configRecycleView() { 
     AutofitGridlayout layoutManager = new AutofitGridlayout(getActivity(), 200); 
     recyclerView.setHasFixedSize(true); 
     recyclerView.setRecycledViewPool(new RecyclerView.RecycledViewPool()); 
     recyclerView.setLayoutManager(layoutManager); 
     recyclerAdapter = new RecycleAdapter(getActivity(), BaseFragment.this); 
     recyclerView.setAdapter(recyclerAdapter); 
    } 

    private void makeService(String query){ 
     dataManager = new DataManager(); 
     Call<MovieResponse> listCall; 
     if (query=="TOP") { 
      listCall= dataManager.getJSONData().getTopMovies(); 
     }else{ 
      listCall= dataManager.getJSONData().getPopMovies(); 
     } 
     listCall.enqueue(new Callback<MovieResponse>() { 
      @Override 
      public void onResponse(Call<MovieResponse> call, Response<MovieResponse> response) { 
       if (response.isSuccessful()) { 
        Results[] results = response.body().getResults(); 
        resultsList = new ArrayList<Results>(Arrays.asList(results)); 
        recyclerAdapter.addMovieList(resultsList); 
        Results firstResult=resultsList.get(0); 
        mListener.onTabletListener(firstResult); 
       } 
      } 

      @Override 
      public void onFailure(Call<MovieResponse> call, Throwable t) { 
       Snackbar.make(rootView, R.string.Network_error, Snackbar.LENGTH_LONG) 
         .show(); 
      } 
     }); 
    } 

    @Override 
    public void onCurrentMovie(Results currentMovie) { 
     mListener.onFragmentInteraction(currentMovie); 
    } 

    @Override 
    public void onAttach(Activity context) { 
     super.onAttach(context); 

     if (context instanceof OnFragmentInteractionListener) { 
      mListener = (OnFragmentInteractionListener) context; 
     } else { 
      throw new RuntimeException(context.toString() 
        + " must implement OnFragmentInteractionListener"); 
     } 
    } 

    public interface OnFragmentInteractionListener { 
     void onTabletListener(Results result); 
     void onFragmentInteraction(Results result); 
    } 

    @Override 
    public void onConfigurationChanged(Configuration newConfig) { 
     super.onConfigurationChanged(newConfig); 
    } 
} 

3- network Klasse

public class NetworkStatus { 

     public static int TYPE_WIFI = 1; 
     public static int TYPE_MOBILE = 2; 
     public static int TYPE_NOT_CONNECTED = 0; 

     public static int getConnectivityStatus(Context context) { 
      ConnectivityManager cm = (ConnectivityManager) context 
        .getSystemService(Context.CONNECTIVITY_SERVICE); 

      NetworkInfo activeNetwork = cm.getActiveNetworkInfo(); 
      if (null != activeNetwork) { 
       if(activeNetwork.getType() == ConnectivityManager.TYPE_WIFI) 
        return TYPE_WIFI; 

       if(activeNetwork.getType() == ConnectivityManager.TYPE_MOBILE) 
        return TYPE_MOBILE; 
      } 
      return TYPE_NOT_CONNECTED; 
     } 
} 

4- manifestieren ---

<manifest package="com.santossingh.popularmovieapp" 
      xmlns:android="http://schemas.android.com/apk/res/android"> 

    <uses-permission android:name="android.permission.INTERNET"/> 
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /> 
    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" /> 
    <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" /> 
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> 

    <application 
     android:allowBackup="true" 
     android:icon="@mipmap/ic_launcher" 
     android:label="@string/app_name" 
     android:supportsRtl="true" 
     android:theme="@style/AppTheme"> 

     <activity 
      android:name=".Activities.MainActivity" 
      android:label="@string/app_name" 
      android:theme="@style/AppTheme.NoActionBar"> 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN"/> 
       <category android:name="android.intent.category.LAUNCHER"/> 
      </intent-filter> 
     </activity> 
     <activity 
      android:name=".Activities.FavoriteActivity" 
      android:label="@string/title_activity_favorite" 
      android:parentActivityName=".Activities.MainActivity" 
      android:theme="@style/AppTheme.NoActionBar"> 
      <meta-data 
       android:name="android.support.PARENT_ACTIVITY" 
       android:value=".Activities.MainActivity"/> 
     </activity> 
     <activity 
      android:name=".Activities.VideoActivity" 
      android:label="@string/title_activity_video" 
      android:theme="@style/AppTheme.NoActionBar"> 
     </activity> 
     <activity 
      android:name=".Activities.DetailActivity" 
      android:label="@string/title_activity_detail" 
      android:parentActivityName=".Activities.MainActivity" 
      android:theme="@style/AppTheme.NoActionBar"> 
      <meta-data 
       android:name="android.support.PARENT_ACTIVITY" 
       android:value="com.santossingh.popularmovieapp.Activities.MainActivity"/> 
     </activity> 
     <activity 
      android:name=".Activities.ReviewActivity" 
      android:label="@string/title_activity_review" 
      android:theme="@style/AppTheme.NoActionBar"> 

     </activity> 
    </application> 

</manifest> 

Answer 1

Zunächst scheint es, dass Sie Empfänger für Netzwerk in Manifest-Datei nicht festgelegt haben, so in Manifest-Datei nach Abschluss aller Aktivitätstags, in Anwendung Tag schreiben Sie unter Code, um Ihren Empfänger zu registrieren.

 <receiver android:name=".Activities.NetworkChangeReceiver" > 
     <intent-filter> 
      <action android:name="android.net.conn.CONNECTIVITY_CHANGE" /> 
     </intent-filter> 
    </receiver> 

</application> 

Beachten Sie, dass, wenn Sie nicht Empfänger dann unten haben Sie überprüfen und nutzen.

 import android.content.BroadcastReceiver; 
    import android.content.Context; 
    import android.content.Intent; 
    import android.widget.Toast; 

    public class NetworkChangeReceiver extends BroadcastReceiver { 

     @Override 
     public void onReceive(final Context context, final Intent intent) 
     { 

     String status = NetworkUtil.getConnectivityStatusString(context); 
     Toast.makeText(context, status, Toast.LENGTH_LONG).show(); 
     } 
    }