how to drag an image by touching in android?

Question

how to drag an image by touching in android? Please Help me with a sample code.

Answer 1

There is no direct way to do drag and drop in Android. You have to write some classes. Look into DragController.java, DragLayer.java in Launcher project.

Answer 2

package com.examples.Touchmoveimage;

import android.app.Activity;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.widget.ImageView;
import android.widget.LinearLayout.LayoutParams;

public class Touchmoveimage extends Activity {

    int windowwidth;
    int windowheight;

    private LayoutParams layoutParams ;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    windowwidth = getWindowManager().getDefaultDisplay().getWidth();
    windowheight = getWindowManager().getDefaultDisplay().getHeight();
    final ImageView balls = (ImageView)findViewById(R.id.ball);

    balls.setOnTouchListener(new View.OnTouchListener() {

                    @Override
                    public boolean onTouch(View v, MotionEvent event) {
                        layoutParams = (LayoutParams) balls.getLayoutParams();
                        switch(event.getAction())
                        {
                        case MotionEvent.ACTION_DOWN:   
                                                        break;
                        case MotionEvent.ACTION_MOVE:
                                                        int x_cord = (int)event.getRawX();
                                                        int y_cord = (int)event.getRawY();

                                                        if(x_cord>windowwidth){x_cord=windowwidth;}
                                                        if(y_cord>windowheight){y_cord=windowheight;}

                                                        layoutParams.leftMargin = x_cord -25;
                                                        layoutParams.topMargin = y_cord - 75;

                                                        balls.setLayoutParams(layoutParams);
                                                        break;
                        default:
                                                        break;
                        }
                            return true;
                    }
            });
}
}

works good!!