Android! SORRY! APP Stop Unexpectaly.. Trying to load image from website keep getting this error

Question

public class test extends Activity {
    ImageView imView;
    ImageView imViewLine;
    String imageUrl="http://www.web.com/app/";
    String FileType = ".png";
    int imageNum = 0;
    Random r;
    int count = 0;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        r= new Random();

        ListView myListView = (ListView)findViewById(R.id.myListView);
        final ArrayList<String> todoItems = new ArrayList<String>();
        final ArrayAdapter<String> aa = new ArrayAdapter<String>(this,R.layout.line,todoItems);

        //Bind the listview to the array adapter
       myListView.setAdapter(aa);
      for(count = 0; count < 2; count++){

       todoItems.add(0, "TEST");
       downloadFile(imageUrl + Integer.toString(count) + FileType);
       aa.notifyDataSetChanged();

       }

    }



    Bitmap bmImg;
    void downloadFile(String fileUrl){
          URL myFileUrl =null;          
          try {
               myFileUrl= new URL(fileUrl);
          } catch (MalformedURLException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
          }
          try {
               HttpURLConnection conn= (HttpURLConnection)myFileUrl.openConnection();
               conn.setDoInput(true);
               conn.connect();
               int length = conn.getContentLength();
               InputStream is = conn.getInputStream();

               bmImg = BitmapFactory.decodeStream(is);
               imViewLine.setImageBitmap(bmImg);
          } catch (IOException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
          }
     }

}



<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">

  <ImageButton
    android:id="@+id/icon"
    android:layout_width="90px"
    android:paddingLeft="2px"
    android:paddingRight="2px"
    android:paddingTop="2px"
    android:layout_height="wrap_content"
    />

  <TextView
    android:id="@+id/label"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:paddingLeft="10px"
    android:paddingTop="5px"
    android:textSize="10sp"
    />

  </LinearLayout>

    <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent">
  <ImageButton
    android:id="@+id/myImageButton"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
  />
  <EditText
    android:id="@+id/myEditText"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="New To Do Item"
  />
  <ListView  
    android:id="@+id/myListView"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
  />
</LinearLayout>

Answer 1

Hi. Make sure you set appropriate permissions in the application manifest file:

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

Also, it seems to me that imViewLine is not instantiated, because imViewLine.setImageBitmap(bmImg); cause a NullPointerException.

Hope that helps.

Regards Thomas