Android 拖拽效果实现代码分享 - ORIETech - android

Android 拖拽效果实现代码分享 - ORIETech

package com.roiding.sample;

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.Button;

public
class Touch extends Activity {

/** Called when the activity is first created. */

@Override

public
void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

final Button btn = (Button) findViewById(R.id.btn_hello);

btn.setOnTouchListener(new OnTouchListener() {

int[] temp = new
int[] { 0, 0 };

public
boolean onTouch(View v, MotionEvent event) {

int eventaction = event.getAction();

Log.i("&&&", "onTouchEvent:" + eventaction);

int x = (int) event.getRawX();

int y = (int) event.getRawY();

switch (eventaction) {

case MotionEvent.ACTION_DOWN: // touch down so check if the

temp[0] = (int) event.getX();

temp[1] = y - v.getTop();

break;

case MotionEvent.ACTION_MOVE: // touch drag with the ball

v.layout(x - temp[0], y - temp[1], x + v.getWidth()

- temp[0], y - temp[1] + v.getHeight());

v.postInvalidate();

break;

case MotionEvent.ACTION_UP:

break;

}

return
false;

}

});

}

Android 拖拽效果实现代码分享 - ORIETech