NullPointerException в представлении пользовательского адаптера

Question

Я получаю изображение из метода растрового изображения и пытаюсь заполнить список. Но когда я вызываю функцию bitmap внутри getview, возникает ошибка nullpointerException. Пожалуйста, помогите мне ...

вот мой класс Вид деятельности:

public class Viewactivity extends Activity{ 

    TextView tv; 
    ImageView im; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.views); 

     ListView mListView = (ListView)findViewById(R.id.listView); 
     //array houlds all images 
     int Images[] = new int[]{ 
      R.drawable.confidential, 
      ...  
      }; 
     //array holds all strings to be drawn in the image 

     CustomList adaptor = new CustomList(this , Images); 
     mListView.setAdapter(adaptor); 


    } 

    public Bitmap ProcessingBitmap(int image) { 
     // TODO Auto-generated method stub 
     Bitmap bm1 = null; 
     Bitmap newBitmap = null; 

     final String data =getIntent().getExtras().getString("keys"); 
     bm1 = ((BitmapDrawable) Viewactivity.this.getResources() 
       .getDrawable(image)).getBitmap(); 
     Config config = bm1.getConfig(); 
     if(config == null){ 
      config = Bitmap.Config.ARGB_8888; 
     } 

     newBitmap = Bitmap.createBitmap(bm1.getWidth(), bm1.getHeight(),config); 
     Canvas newCanvas = new Canvas(newBitmap); 

     newCanvas.drawBitmap(bm1, 0, 0, null); 


     if(data != null){ 
      Paint paintText = new Paint(Paint.ANTI_ALIAS_FLAG); 
      paintText.setColor(Color.RED); 
      paintText.setTextSize(300); 
      // paintText.setTextAlign(Align.CENTER); 
      paintText.setStyle(Style.FILL); 
      paintText.setShadowLayer(10f, 10f, 10f, Color.BLACK); 

      Rect rectText = new Rect(); 
      paintText.getTextBounds(data, 0, data.length(), rectText); 
      paintText.setTextScaleX(1.f); 

      newCanvas.drawText(data, 
       0, rectText.height(), paintText); 

      Toast.makeText(getApplicationContext(), 
       "drawText: " + data, Toast.LENGTH_LONG).show(); 

     }else{ 
      Toast.makeText(getApplicationContext(), 
       "caption empty!", Toast.LENGTH_LONG).show(); 
     } 
     return newBitmap; 

    } 
} 

это мой адаптер класса:

public class CustomList extends BaseAdapter{ 

    Viewactivity act; 
    int[] IMAGES; 
    LayoutInflater inflator; 
    Context sContext; 
    //private String[] TEXTS; 

    public CustomList(Context context, int[] images){ 
     this.IMAGES = images; 
     //this.TEXTS = texts; 
     this.sContext = context; 
     inflator = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
    } 

    @Override 
    public int getCount() { 
     // TODO Auto-generated method stub 
     return IMAGES.length; 
    } 

    @Override 
    public Object getItem(int position) { 
     // TODO Auto-generated method stub 
     return position; 
    } 

    @Override 
    public long getItemId(int position) { 
     // TODO Auto-generated method stub 
     return position; 
    } 

    @Override 
    public View getView(int position, View convertView, ViewGroup parent) { 
     // TODO Auto-generated method stub 
     View v = inflator.inflate(R.layout.row_list, parent, false); 
     final ImageView imageView = (ImageView) v.findViewById(R.id.imageView); 
     imageView.setImageBitmap(act.ProcessingBitmap(IMAGES[position]));// line no:52 
     return imageView; 
    } 
} 

это мой LogCat:

12-18 06:16:51.406: E/AndroidRuntime(1388): FATAL EXCEPTION: main 
12-18 06:16:51.406: E/AndroidRuntime(1388): Process: com.emple.example, PID: 1388 
12-18 06:16:51.406: E/AndroidRuntime(1388): java.lang.NullPointerException 
12-18 06:16:51.406: E/AndroidRuntime(1388):  at com.emple.example.CustomList.getView(CustomList.java:52) 
12-18 06:16:51.406: E/AndroidRuntime(1388):  at android.widget.AbsListView.obtainView(AbsListView.java:2263) 
12-18 06:16:51.406: E/AndroidRuntime(1388):  at android.widget.ListView.measureHeightOfChildren(ListView.java:1263) 
12-18 06:16:51.406: E/AndroidRuntime(1388):  at android.widget.ListView.onMeasure(ListView.java:1175) 
12-18 06:16:51.406: E/AndroidRuntime(1388):  at android.view.View.measure(View.java:16497) 
12-18 06:16:51.406: E/AndroidRuntime(1388):  at android.widget.RelativeLayout.measureChild(RelativeLayout.java:689) 
12-18 06:16:51.406: E/AndroidRuntime(1388):  at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:473) 
12-18 06:16:51.406: E/AndroidRuntime(1388):  at android.view.View.measure(View.java:16497) 
12-18 06:16:51.406: E/AndroidRuntime(1388):  at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125) 
12-18 06:16:51.406: E/AndroidRuntime(1388):  at android.widget.FrameLayout.onMeasure(FrameLayout.java:310) 
12-18 06:16:51.406: E/AndroidRuntime(1388):  at android.view.View.measure(View.java:16497) 
12-18 06:16:51.406: E/AndroidRuntime(1388):  at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125) 
12-18 06:16:51.406: E/AndroidRuntime(1388):  at com.android.internal.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:327) 
12-18 06:16:51.406: E/AndroidRuntime(1388):  at android.view.View.measure(View.java:16497) 
12-18 06:16:51.406: E/AndroidRuntime(1388):  at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125) 
12-18 06:16:51.406: E/AndroidRuntime(1388):  at android.widget.FrameLayout.onMeasure(FrameLayout.java:310) 
12-18 06:16:51.406: E/AndroidRuntime(1388):  at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2291) 
12-18 06:16:51.406: E/AndroidRuntime(1388):  at android.view.View.measure(View.java:16497) 
12-18 06:16:51.406: E/AndroidRuntime(1388):  at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1916) 
12-18 06:16:51.406: E/AndroidRuntime(1388):  at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1113) 
12-18 06:16:51.406: E/AndroidRuntime(1388):  at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1295) 
12-18 06:16:51.406: E/AndroidRuntime(1388):  at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1000) 
12-18 06:16:51.406: E/AndroidRuntime(1388):  at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5670) 
12-18 06:16:51.406: E/AndroidRuntime(1388):  at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761) 
12-18 06:16:51.406: E/AndroidRuntime(1388):  at android.view.Choreographer.doCallbacks(Choreographer.java:574) 
12-18 06:16:51.406: E/AndroidRuntime(1388):  at android.view.Choreographer.doFrame(Choreographer.java:544) 
12-18 06:16:51.406: E/AndroidRuntime(1388):  at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747) 
12-18 06:16:51.406: E/AndroidRuntime(1388):  at android.os.Handler.handleCallback(Handler.java:733) 
12-18 06:16:51.406: E/AndroidRuntime(1388):  at android.os.Handler.dispatchMessage(Handler.java:95) 
12-18 06:16:51.406: E/AndroidRuntime(1388):  at android.os.Looper.loop(Looper.java:136) 
12-18 06:16:51.406: E/AndroidRuntime(1388):  at android.app.ActivityThread.main(ActivityThread.java:5017) 
12-18 06:16:51.406: E/AndroidRuntime(1388):  at java.lang.reflect.Method.invokeNative(Native Method) 
12-18 06:16:51.406: E/AndroidRuntime(1388):  at java.lang.reflect.Method.invoke(Method.java:515) 
12-18 06:16:51.406: E/AndroidRuntime(1388):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779) 
12-18 06:16:51.406: E/AndroidRuntime(1388):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 
12-18 06:16:51.406: E/AndroidRuntime(1388):  at dalvik.system.NativeStart.main(Native Method) 
12-18 06:21:51.616: I/Process(1388): Sending signal. PID: 1388 SIG: 9 

Answer 1

You не инициализировали вашу переменную act. Инициализируйте его в своем конструкторе адаптера.

Что-то вроде:

public CustomList(Viewactivitty act, int[] images){ 
    this.act = act; 
    this.IMAGES = images; 
    //this.TEXTS = texts; 
    this.sContext = act; 
    inflator = (LayoutInflater)act.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
}