Change Image of ImageView programmatically in Android

Question

When I change the image programmatically‎, it shows new image on top of the old image which is set originally in layout file?

Here is a snippet of my layout file:

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="39dp"
    android:gravity="center_vertical" >
    <ImageView
        android:id="@+id/qStatusImage"
        android:layout_width="16dp"
        android:layout_height="16dp"
        android:layout_margin="5dp"
        android:background="@drawable/thumbs_down"
         />

    <TextView
        android:id="@+id/grp_child"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:textColor="@color/radio_colors"
        android:textStyle="normal"
        android:background="@color/grey"
    />

 </LinearLayout>

And the code that sets the imageView:

     @Override
public View getChildView(final int groupPosition, final int childPosition,
        boolean isLastChild, View convertView, ViewGroup parent) {
//Answers
            if(answersGroup != null)
                   answersGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() {
                       @Override
                    public void onCheckedChanged(RadioGroup group, int checkedId) {

                         //  int index = answersGroup.indexOfChild(findViewById(answersGroup.getCheckedRadioButtonId()));

                           qImageView = (ImageView) V.findViewById(R.id.qStatusImage);
                           if(ans ==0 || ans == 5){
                            //   qSV.setImageResource(0);
                               qImageView.setImageResource(R.drawable.thumbs_up);
                           }
                           else
                               qImageView.setImageResource(R.drawable.thumbs_down);

                       }
                   });

What am I missing?

Answer 1

That happens because you're setting the src of the ImageView instead of the background.

Use this instead:

qImageView.setBackgroundResource(R.drawable.thumbs_down);

Here's a thread that talks about the differences between the two methods.