postdelayed

I have a layout which specifies sizes of widgets in relative dimension, for example: <LinearLayout ... layout_height="fill_parent"> <ImageView ... layout_height="wrap_content" /> <TextView ... layout_height="120dp" /> </LinearLayout> Immediately after onCreate , I want to know how much is the height of the ImageView. How to do that? Note: If I call getHeight() in onCreate , I get 0. I have also tried imageView.postDelayed , it works on 2.1 emulator but fails on 1.5 emulator (I got 0, too). Finally, I tried to create a Handler , and then I call handler.postDelayed with 10 ms delay. It works in

I call multiple Handlers by new Handler().postDelayed(new Runnable()..... How can I stop it, if I click on return button? public class Tag1 extends Oberklasse implements OnClickListener { public Button btn; //private Handler myHandler = new Handler(); Handler handler; Runnable myRunnable; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.tt1); //Bildschirm soll anbleiben!!! getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); //Lautstärke BUttons enable setVolumeControlStream(AudioManager.STREAM_MUSIC);

I have a situation in an Android app where I want to start a network activity (sending out some data) which should run every second. I achieve this as follows: In the onCreate() I have the code: tv = new TextView(this); tv.postDelayed(sendData, 1000); The sendData() function: Handler handler = new Handler(); private Runnable sendData=new Runnable(){ public void run(){ try { //prepare and send the data here.. handler.removeCallbacks(sendData); handler.postDelayed(sendData, 1000); } catch (Exception e) { e.printStackTrace(); } } }; The problem come in like this: When user presses the back