I want to make a view that updates its contents and shows regularly on the top of the windows. I found an example that makes a view on the top of the windows (http://blog.daum.net/mailss/18). The activity makes a UI and if I touched the start service button, the view shows its text. But when the view has created, it doesn't update its contents. I tried to add simple code that counts the number of view updating, but it doesn't work. How can I change the contents of the view regularly? Should I add a loop code in the service? I need your advice, thank you.
1.AlwaysOnTopActivity.java
public class AlwaysOnTopActivity extends Activity implements OnClickListener {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
findViewById(R.id.start).setOnClickListener(this); //start button
findViewById(R.id.end).setOnClickListener(this); //stop button
}
@Override
public void onClick(View v) {
int view = v.getId();
if(view == R.id.start)
startService(new Intent(this, AlwaysOnTopService.class));
else
stopService(new Intent(this, AlwaysOnTopService.class));
}
}
2.AlwaysOnTopService.java
public class AlwaysOnTopService extends Service {
private TextView tv;
@Override
public IBinder onBind(Intent arg0) { return null; }
@Override
public void onCreate() {
super.onCreate();
tv = new TextView(this); //creating view
tv.setText("This view is always on top.");
tv.setTextSize(TypedValue.COMPLEX_UNIT_SP, 18);
tv.setTextColor(Color.BLUE);
WindowManager.LayoutParams params = new WindowManager.LayoutParams(
WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY, //to always on top
WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH,//for touch event
PixelFormat.TRANSLUCENT);
WindowManager wm = (WindowManager) getSystemService(WINDOW_SERVICE);
wm.addView(tv, params);//We must configure the permission in the manifest
}
@Override
public void onDestroy() {
super.onDestroy();
if(tv != null) //terminating the view
{
((WindowManager) getSystemService(WINDOW_SERVICE)).removeView(tv);
tv = null;
}
}
}
