Question

I’m trying to create a button which when held would add 1 or any number to it until the button is released. My goal would be to create an on-screen cursor key controller to move around a button/bitmap. The below code only adds 1 when pressed down. How to get it to count it continuously?

Thanks for you help

package s.apps.kontroler;

import android.app.Activity;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.widget.Button;
import android.widget.TextView;

public class Test extends Activity implements OnTouchListener {

    Button up;
    TextView text;
    int countup;

    boolean isDown = false;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.test);

        up = (Button) findViewById(R.id.button1);
        text = (TextView) findViewById(R.id.textView1);

        up.setOnTouchListener(this);

    }

    public boolean onTouch(View arg0, MotionEvent event) {
        // TODO Auto-generated method stub

        int i = event.getAction();

        if (i == MotionEvent.ACTION_DOWN) {
            isDown = true;

            if (isDown) {
                countup++;
                text.setText("Count is: " + countup);
            }

            else if (i == MotionEvent.ACTION_UP) {
                isDown = false;
            }

        }
        return true;
    }
}

Answer 1

This should do it:

private static final int INTERVAL=500;

private Handler handler= new Handler();

private Runnable incrementRunnable = new Runnable() {
    @Override
    public void run() {
        countup++;
        text.setText("Count is: " + countup);
        handler.postDelayed(this, INTERVAL);
    }
 }


public boolean onTouch(View arg0, MotionEvent event) {
    int i = event.getAction();
    if (i == MotionEvent.ACTION_DOWN) {
        incrementRunnable.run();
    } 
    else if (i == MotionEvent.ACTION_UP) {
        handler.removeCallbacks(incrementRunnable);
    }
    return true;
}