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Monday, January 7, 2013

LISTVIEW gets refresh and change the value while scroling issue(SOLVED)



First of all main.xml file will be like below:


<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity" >
    <ListView
        android:id="@+id/list"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        
         />
</RelativeLayout>

Row file for the inflator is as below.



<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
    <SeekBar
        android:id="@+id/seekBar1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" 
        android:max="100"/>
    <LinearLayout android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="horizontal">
        <Button
            android:id="@+id/button1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="click to see row number" />
        <Button
            android:id="@+id/button2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="0" />
    </LinearLayout>
</LinearLayout>




Now the class in the activity should be like this.... See the getview method for the logic of not refreshing the list view after scrolling :


public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

ListView lv = (ListView) findViewById(R.id.list);
lv.setAdapter(new ListAdapter(MainActivity.this));
}

private class ListAdapter extends BaseAdapter {
private Context con;
private int size = 20;
private int s[] = new int[20];

public ListAdapter(MainActivity mainActivity) {
// TODO Auto-generated constructor stub
this.con = mainActivity;
for (int i = 0; i < size; i++) {
s[i] = 0;
}

}

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

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

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

@Override
public View getView(final int position, View convertView,ViewGroup parent) {
// TODO Auto-generated method stub
LayoutInflater inflater = LayoutInflater.from(this.con);
View View = inflater.inflate(R.layout.list_row, null);
SeekBar seekbar = (SeekBar) View.findViewById(R.id.seekBar1);
Button btnrow = (Button) View.findViewById(R.id.button1);
final Button btnseek = (Button) View.findViewById(R.id.button2);

seekbar.setProgress(s[position]);
btnseek.setText("" + s[position]);

seekbar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}

@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}

@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
// TODO Auto-generated method stub
btnseek.setText("" + progress);
s[position] = progress;

}
});

return View;
}

}

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