Android 拖动的实现

布局文件

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《?xml version="1.0" encoding="utf-8"?》

《LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:orientation="vertical" android:layout_width="fill_parent"

android:layout_height="fill_parent"》

《Button android:id="@+id/btn_hello" android:layout_width="fill_parent"

android:layout_height="wrap_content" android:text="@string/hello" /》

《/LinearLayout》

《?xml version="1.0" encoding="utf-8"?》

《LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:orientation="vertical" android:layout_width="fill_parent"

android:layout_height="fill_parent"》

《Button android:id="@+id/btn_hello" android:layout_width="fill_parent"

android:layout_height="wrap_content" android:text="@string/hello" /》

《/LinearLayout》

2. 代码

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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);