Android 拖拽图片

拖拽图片效果

package com.iaiai.activity;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.widget.ImageView;

/**
 * 
 * <p>
 * Title: IaiaiActivity.java
 * </p>
 * <p>
 * E-Mail: [e-mail]
 * </p>
 * <p>
 * QQ: 176291935
 * </p>
 * <p>
 * Http: iaiai.iteye.com
 * </p>
 * <p>
 * Create time: 2011-6-26
 * </p>
 * 
 * @author 丸子
 * @version 0.0.1
 */
public class IaiaiActivity extends Activity {

	ImageView img;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		img = (ImageView) findViewById(R.id.img_view);

		img.setOnTouchListener(new OnTouchListener() {
			private int mx, my;

			public boolean onTouch(View v, MotionEvent event) {
				switch (event.getAction()) {
				case MotionEvent.ACTION_MOVE:
					mx = (int) (event.getRawX());
					my = (int) (event.getRawY() - 50);

					v.layout(mx - img.getWidth() / 2, my - img.getHeight() / 2,
							mx + img.getWidth() / 2, my + img.getHeight() / 2);
					Log.i("****************", "Move");
					break;
				case MotionEvent.ACTION_DOWN:
					Log.i("****************", "Down");
					break;
				case MotionEvent.ACTION_UP:
					Log.i("****************", "Up");
					break;
				}
				return true;
			}
		});
	}

}