title: How to add a dynamic images in ViewFlipper ???
body: <p>I am using this code. to access the particular folder in order to get a list of images and add it into a <code>ViewFlipper</code>. but i have problem with this, i can't add it into the ViewFlipper.So  please if any one know how to resolve this problem, i will appreciate his help . Sorry for my bad english.</p>
  
  <pre><code>public ImageView[] imageView;
  byte[] mByte = null;            
  
  public BufferedInputStream mBufferedInputStream;
  Bitmap[] bMap; 
  File dir=new File("/sdcard/image folder");
        System.out.println("Dir is"+dir);
          String[] file_name = dir.list(new FilenameFilter() {
  
              @Override
              public boolean accept(File dir, String name) {
                  // TODO Auto-generated method stub
                  if(new File(dir,name).isDirectory())
                  return true;
                  return name.toLowerCase().endsWith(".jpg");
              }
          });
          for(String singleFile : file_name){
              System.out.println("----------&gt;"+dir.toString()+"/"+singleFile);
              try {
                  FileInputStream     mFileInputStream = new FileInputStream(dir+"/"+singleFile);
                  mBufferedInputStream = new BufferedInputStream(mFileInputStream);
                  mByte = new byte[mBufferedInputStream.available()+(16*1024)];
                  mBufferedInputStream.read(mByte);
                  bMap = new Bitmap[file_name.length];
                  bMap[position] = BitmapFactory.decodeByteArray(mByte, 0, mByte.length); 
                  imageView[file_name.length] = new ImageView(this);
                  imageView[position].setImageBitmap(bMap[position]);
                  mViewFlipper.addView(imageView[position]);
                  bMap[position].recycle();
                  position++;
              } catch (FileNotFoundException e) {
                  // TODO Auto-generated catch block
                  e.printStackTrace();
              } catch (Exception e) {
                  // TODO Auto-generated catch block
                  e.printStackTrace();
              }
  
          }
  
          mViewFlipper.startFlipping();
          mViewFlipper.setOnTouchListener(this);     
  </code></pre>
  
  <p>In the LogCat :</p>
  
  <pre><code>09-27 19:27:17.490: WARN/System.err(9910): java.lang.NullPointerException
  09-27 19:27:17.490: WARN/System.err(9910):     at     com.android.SD_Card_Img_Reader.SD_CardImageReaderActivity.onCreate(SD_CardImageReaderActivity.java:76)
   09-27 19:27:17.501: WARN/System.err(9910):     at  android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
   09-27 19:27:17.501: WARN/System.err(9910):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
   09-27 19:27:17.501: WARN/System.err(9910):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
   09-27 19:27:17.511: WARN/System.err(9910):     at android.app.ActivityThread.access$2300(ActivityThread.java:125)
   09-27 19:27:17.511: WARN/System.err(9910):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
   09-27 19:27:17.541: WARN/System.err(9910):     at android.os.Handler.dispatchMessage(Handler.java:99)
   09-27 19:27:17.584: WARN/System.err(9910):     at android.os.Looper.loop(Looper.java:123)
   09-27 19:27:17.584: WARN/System.err(9910):     at android.app.ActivityThread.main(ActivityThread.java:4627)
   09-27 19:27:17.584: WARN/System.err(9910):     at java.lang.reflect.Method.invokeNative(Native Method)
   09-27 19:27:17.584: WARN/System.err(9910):     at java.lang.reflect.Method.invoke(Method.java:521)
   09-27 19:27:17.584: WARN/System.err(9910):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
   09-27 19:27:17.584: WARN/System.err(9910):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
   09-27 19:27:17.590: WARN/System.err(9910):     at dalvik.system.NativeStart.main(Native Method)
   09-27 19:27:17.590: INFO/System.out(9910): ----------&gt;/sdcard/image folder/darkred.jpg
   09-27 19:27:17.590: INFO/global(9910): Default buffer size used in BufferedInputStream constructor. It would be better to be explicit if an 8k buffer is required.
   09-27 19:27:17.721: DEBUG/dalvikvm(9910): GC_EXTERNAL_ALLOC freed 406 objects / 125952 bytes in 125ms
   09-27 19:27:18.571: WARN/System.err(9910): java.lang.NullPointerException
   09-27 19:27:18.651: WARN/System.err(9910):     at com.android.SD_Card_Img_Reader.SD_CardImageReaderActivity.onCreate(SD_CardImageReaderActivity.java:76)
   09-27 19:27:18.651: WARN/System.err(9910):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
   09-27 19:27:18.771: WARN/System.err(9910):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
   09-27 19:27:18.771: WARN/System.err(9910):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
   09-27 19:27:18.771: WARN/System.err(9910):     at android.app.ActivityThread.access$2300(ActivityThread.java:125)
   09-27 19:27:18.771: WARN/System.err(9910):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
   09-27 19:27:18.771: WARN/System.err(9910):     at android.os.Handler.dispatchMessage(Handler.java:99)
   09-27 19:27:18.771: WARN/System.err(9910):     at android.os.Looper.loop(Looper.java:123)
   09-27 19:27:18.771: WARN/System.err(9910):     at android.app.ActivityThread.main(ActivityThread.java:4627)
   09-27 19:27:18.771: WARN/System.err(9910):     at java.lang.reflect.Method.invokeNative(Native Method)
  09-27 19:27:18.771: WARN/System.err(9910):     at java.lang.reflect.Method.invoke(Method.java:521)
   09-27 19:27:18.771: WARN/System.err(9910):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
  09-27 19:27:18.771: WARN/System.err(9910):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
   09-27 19:27:18.771: WARN/System.err(9910):     at dalvik.system.NativeStart.main(Native Method)
  </code></pre>