How do I set a function to repeat until a Button is pressed

Given the following code:

package com.buttonsound;

imp开发者_如何学Cort android.app.Activity;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;

public class buttonsound extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        final MediaPlayer mpButton=MediaPlayer.create(this,R.raw.button_click);
        Button buttonsound=(Button) findViewById(R.id.button1);
        buttonsound.setOnTouchListener(new View.OnTouchListener() {
            public boolean onTouch(View v, MotionEvent me) {
                while(me.getAction()==MotionEvent.ACTION_DOWN)
                {
                    mpButton.start();
                }
                return false;
            }
        });
    }
}

How do I start a function and set it to repeat until a Button is pressed which terminates the operation. The above code simply repeats even after the button is released.

You're never calling stop(), of course it'll keep playing. Your while loop is calling start() multiple times, you shouldn't be doing that. Think of it like any other Media Player -- you don't continually press Play to listen to the whole track, it continues until you tell it otherwise.

Try something like this instead:

public boolean onTouch(View v, MotionEvent me) {
    switch(me.getAction()) {
        case MotionEvent.ACTION_DOWN:
            if(!mpButton.isPlaying()) mpButton.start();
            break;
        case MotionEvent.ACTION_UP:
            if(mpButton.isPlaying()) mpButton.stop();
            break;
    }
}

EDIT: As an aside, naming a MediaPlayer mpButton is just asking for confusion down the line; just sayin'. ;)

hi you can do something like this :

Boolean btnIsPressed = false;
Button btn = (Button) findViewById(R.id.btn);

and add a thread , and in the method run add this code :

@Override
public void run(){
      while(!btnIsPressed){
          myfunction();
      }
}

finally , in your method onCreate , add a listener to change the value of your boolean to true like this :

btn.addOnClickListener( new OnClickListener(){

   @Overrride
   public void onClick(View v){
      btnIsPressed = true;
   }
});

Hope it helps

if you're talking about how to repeat something in mediaplayer just

 mediaPlayer.seekTo(0);
 mediaPlayer.start();