Ustawianie detektora długiego kliknięcia w GridView

Question

Chcę dodać detektor długiego kliknięcia, który ustawi wybrany obraz jako tapetę. Dostaję obrazy z sieci i wyświetlam je w widoku siatki. Moja aktywność sieci jest pokazana poniżej. Mam już moduł nasłuchujący typu "kliknij, aby wyświetlić pełny obraz".

public class ImageGridActivity extends BaseActivity { 

String[] imageUrls; 

DisplayImageOptions options; 

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

    requestWindowFeature(Window.FEATURE_NO_TITLE); 
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 
      WindowManager.LayoutParams.FLAG_FULLSCREEN); 

    setContentView(R.layout.ac_image_grid); 

    Bundle bundle = getIntent().getExtras(); 
    imageUrls = bundle.getStringArray(Extra.IMAGES); 

    options = new DisplayImageOptions.Builder() 
      .showStubImage(R.drawable.stub_image) 
      .showImageForEmptyUri(R.drawable.image_for_empty_url) 
      .cacheInMemory().cacheOnDisc() 
      .bitmapConfig(Bitmap.Config.RGB_565).build(); 

    GridView gridView = (GridView) findViewById(R.id.gridview); 
    gridView.setAdapter(new ImageAdapter()); 

    // Set Long-Clickable 
    gridView.setLongClickable(true); 
    gridView.setOnItemLongClickListener(new OnItemLongClickListener() { 

     @SuppressLint("NewApi") 
     public boolean onItemLongClick(AdapterView<?> parent, View arg1, 
       int position, long arg3) { 
      // TODO Auto-generated method stub 
      ImageAdapter i = (ImageAdapter) parent.getAdapter(); 
      Bitmap mBitmap = BitmapFactory.decodeResource(getResources(), 
        (int) i.getItemId(position)); 

      // Get the WallpaperManager 
      WallpaperManager myWallpaperManager = WallpaperManager 
        .getInstance(getApplicationContext()); 

      try { 
       // Set the clicked bitmap 
       myWallpaperManager.setBitmap(mBitmap); 
       Toast.makeText(ImageGridActivity.this, "Wallpaper set", 
         Toast.LENGTH_SHORT).show(); 
      } catch (IOException e) { 
       Toast.makeText(ImageGridActivity.this, "Error setting wallpaper", 
         Toast.LENGTH_SHORT).show(); 
      } 

      return false; 
     } 
    }); 

    gridView.setOnItemClickListener(new OnItemClickListener() { 

     @SuppressLint("NewApi") 
     @Override 
     public void onItemClick(AdapterView<?> parent, View view, 
       int position, long id) { 
      startImageGalleryActivity(position); 
     } 
    }); 

    gridView.setOnScrollListener(new PauseOnScrollListener(true, true)); 

} 

private void startImageGalleryActivity(int position) { 
    Intent intent = new Intent(this, ImagePagerActivity.class); 
    intent.putExtra(Extra.IMAGES, imageUrls); 
    intent.putExtra(Extra.IMAGE_POSITION, position); 
    startActivity(intent); 
} 

public class ImageAdapter extends BaseAdapter { 
    @Override 
    public int getCount() { 
     return imageUrls.length; 
    } 

    @Override 
    public Object getItem(int position) { 
     return null; 
    } 

    @Override 
    public long getItemId(int position) { 
     return position; 
    } 

    @Override 
    public View getView(int position, View convertView, ViewGroup parent) { 
     final ImageView imageView; 
     if (convertView == null) { 
      imageView = (ImageView) getLayoutInflater().inflate(
        R.layout.item_grid_image, parent, false); 
     } else { 
      imageView = (ImageView) convertView; 
     } 

     imageLoader.displayImage(imageUrls[position], imageView, options); 
     return imageView; 
    } 
} 

logcat

 01-22 16:00:35.101: E/AndroidRuntime(29785): FATAL EXCEPTION: main 
01-22 16:00:35.101: E/AndroidRuntime(29785): android.content.res.Resources$NotFoundException: Resource ID #0x2 
01-22 16:00:35.101: E/AndroidRuntime(29785): at android.content.res.Resources.getValue(Resources.java:1105) 
01-22 16:00:35.101: E/AndroidRuntime(29785): at android.graphics.BitmapFactory.decodeResource(BitmapFactory.java:554) 
01-22 16:00:35.101: E/AndroidRuntime(29785): at android.graphics.BitmapFactory.decodeResource(BitmapFactory.java:630) 
01-22 16:00:35.101: E/AndroidRuntime(29785): at com.nostra13.example.universalimageloader.ImageGridActivity$1.onItemLongClick(ImageGridActivity.java:67) 
01-22 16:00:35.101: E/AndroidRuntime(29785): at android.widget.AbsListView.performLongPress(AbsListView.java:2622) 
01-22 16:00:35.101: E/AndroidRuntime(29785): at android.widget.AbsListView$CheckForLongPress.run(AbsListView.java:2572) 
01-22 16:00:35.101: E/AndroidRuntime(29785): at android.os.Handler.handleCallback(Handler.java:608) 
01-22 16:00:35.101: E/AndroidRuntime(29785): at android.os.Handler.dispatchMessage(Handler.java:92) 
01-22 16:00:35.101: E/AndroidRuntime(29785): at android.os.Looper.loop(Looper.java:156) 
01-22 16:00:35.101: E/AndroidRuntime(29785): at android.app.ActivityThread.main(ActivityThread.java:4987) 
01-22 16:00:35.101: E/AndroidRuntime(29785): at java.lang.reflect.Method.invokeNative(Native Method) 
01-22 16:00:35.101: E/AndroidRuntime(29785): at java.lang.reflect.Method.invoke(Method.java:511) 
01-22 16:00:35.101: E/AndroidRuntime(29785): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 
01-22 16:00:35.101: E/AndroidRuntime(29785): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 
01-22 16:00:35.101: E/AndroidRuntime(29785): at dalvik.system.NativeStart.main(Native Method) 

android manifest

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="com.nostra13.example.universalimageloader" 
    android:versionCode="26" 
    android:versionName="1.7.0" > 

    <uses-sdk 
     android:minSdkVersion="5" 
     android:targetSdkVersion="17" /> 

    <uses-permission android:name="android.permission.INTERNET" /> 
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> 
    <uses-permission android:name="android.permission.SET_WALLPAPER"/> 

    <application 
     android:name=".UILApplication" 
     android:icon="@drawable/app_icon" 
     android:label="@string/app_name" 
     android:allowBackup="True" 
     > 
     <activity 
      android:name=".HomeActivity" 
      android:label="@string/app_name" > 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN" /> 

       <category android:name="android.intent.category.LAUNCHER" /> 
      </intent-filter> 
     </activity> 

     <activity 
      android:name=".ImageGridActivity" 
      android:label="@string/ac_name_image_grid" /> 
     <activity 
      android:name=".ImagePagerActivity" 
      android:label="@string/ac_name_image_pager" /> 


     <!-- Widget --> 
     <receiver android:name=".widget.UILWidgetProvider"> 
      <meta-data 
       android:name="android.appwidget.provider" 
       android:resource="@xml/widget_provider" /> 

      <intent-filter> 
       <action android:name="android.appwidget.action.APPWIDGET_UPDATE" /> 
      </intent-filter> 
     </receiver> 
    </application> 

</manifest> 

Answer 1

Korzystając OnItemLong listener zamiast OnItemClick Listener.

Zamiast:

gridView.setOnItemClickListener(new OnItemClickListener() { 
     @SuppressLint("NewApi") 
     @Override 
     public void onItemClick(AdapterView<?> parent, View view, 
       int position, long id) { 

      startImageGalleryActivity(position); 
     } 
    }); 

Zastosowanie

gridView.setOnItemLongClickListener(new OnItemLongClickListener() { 

    @Override 
    public boolean onItemLongClick(AdapterView<?> arg0, View arg1, 
      int position, long arg3) { 
     startImageGalleryActivity(position); 
     return false; 
    } 
}); 

Updated

OnItemClickListener

gridview.setOnItemClickListener(new OnItemClickListener() { 
       public void onItemClick(AdapterView<?> parent, View v, int position, long id) { 
        Toast.makeText(test2.this, "Click Listener", Toast.LENGTH_SHORT).show(); 
        // open the pager activity 
        } }); 

OnItemLongClickListener

gridview.setOnItemLongClickListener(new OnItemLongClickListener() { 

        public boolean onItemLongClick(AdapterView<?> arg0, View arg1, 
          int position, long arg3) { 
         Toast.makeText(test2.this, "LONG PRESS", Toast.LENGTH_SHORT).show(); 
         //set the image as wallpaper 
         return true; 
        } 
       }); 

Answer 2

Użyj tego zamiast:

gridView.setOnItemLongClickListener(new OnItemLongClickListener() { 

     @Override 
     public boolean onItemLongClick(AdapterView<?> arg0, View arg1, 
       int arg2, long arg3) { 
      // TODO Auto-generated method stub 
      return false; 
     } 
    }); 

Answer 3

Można użyć

gridView.setOnLongClickListener(new OnLongClickListener() { 

       @Override 
       public boolean onLongClick(View v) { 
        // TODO Auto-generated method stub 
        return false; 
       } 
      }); 

Answer 4

napisać tę część w kodzie, aby ustawić długie kliknięcie na GridView

GridView gridView = (GridView) findViewById(R.id.gridview); 
    //Set Long-Clickable 
    gridView.setLongClickable(true); 
    gridView.setOnItemLongClickListener(new OnItemLongClickListener() { 

     @Override 
     public boolean onItemLongClick(AdapterView<?> arg0, View view, 
       int position , long id) { 
      // TODO Auto-generated method stub 
         Toast.makeText(getApplicationContext(), "Long Click", Toast.LENGTH_SHORT).show(); 
          /* 
          *You Can use parameters like position,view or id to 
          *Customize your action 
          */ 
      return false; 
     } 
    }); 

Kliknij Listener

gridView.setOnItemClickListener(new OnItemClickListener() { 
     @Override 
     public void onItemClick(AdapterView<?> parent, View v, 
       int position, long id) { 
    Toast.makeText(getApplicationContext(), "Click", Toast.LENGTH_SHORT).show(); 
     } 
    }); 

Ustawianie Wall Paper myślę, że trzeba ustawić pozwolenie

<uses-permission android:name="android.permission.SET_WALLPAPER"></uses-permission> 

Uwaga: spójrz na log cat, mówiąc: Resources$NotFoundException Sprawdź, czy dodałeś zasoby poprawnie. może być na niewłaściwym folderze lub czymś w rodzaju sprawdzania this

Answer 5

Po pierwsze, zmień ten wiersz.

public class ImageGridActivity extends BaseActivity implements OnItemLongClickListener 

Następnie dodać ten kod w swojej działalności ...

GridView gridView = (GridView) findViewById(R.id.gridview); 
gridView.setOnItemLongClickListener(this); 

    @Override 
    public boolean onItemLongClick(AdapterView<?> parent, View v, int pos,long id) 
    { 
     System.out.println("~~~~~~Long Item Clicked"); 
     return false; 
    } 

Nadzieja to pomaga :)

Answer 6

Spróbuj tego.Return true w onItemLongClick i swojej onItemClickListener nie nazywa :)

public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) { 
. 
. 
. 
return true; 
}