Android中获取和设置手机的壁纸

package com.easyway.android.ui;

import java.io.IOException;

import android.app.Activity;
import android.app.WallpaperManager;
import android.graphics.Color;
import android.graphics.PorterDuff;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
/**
* 在Android中获取和设置手机的壁纸
*
* //获取壁纸管理器
* final WallpaperManager wallpaperManager = WallpaperManager.getInstance(this);
* //获取壁纸图片
* final Drawable wallpaperDrawable = wallpaperManager.getDrawable();
* 设置壁纸的方法
* //更换壁纸
wallpaperManager.setBitmap(imageView.getDrawingCache());
* @author longgangbai
*
*/
public class AndroidWallpaperActivity extends Activity {

final static private int[] mColors =
{Color.BLUE, Color.GREEN, Color.RED, Color.LTGRAY, Color.MAGENTA, Color.CYAN,
Color.YELLOW, Color.WHITE};

/**
* Initialization of the Activity after it is first created. Must at least
* call {@link android.app.Activity#setContentView setContentView()} to
* describe what is to be displayed in the screen.
*/
@Override
protected void onCreate(Bundle savedInstanceState) {
// Be sure to call the super class.
super.onCreate(savedInstanceState);
// See res/layout/wallpaper_2.xml for this
// view layout definition, which is being set here as
// the content of our screen.
setContentView(R.layout.wallpaper);
//获取壁纸管理器
final WallpaperManager wallpaperManager = WallpaperManager.getInstance(this);
//获取壁纸图片
final Drawable wallpaperDrawable = wallpaperManager.getDrawable();
//图片视图
final ImageView imageView = (ImageView) findViewById(R.id.imageview);
//绘制缓存
imageView.setDrawingCacheEnabled(true);
//设置图片
imageView.setImageDrawable(wallpaperDrawable);

//更改壁纸的颜色
Button randomize = (Button) findViewById(R.id.randomize);
randomize.setOnClickListener(new OnClickListener() {
public void onClick(View view) {
int mColor = (int) Math.floor(Math.random() * mColors.length);
wallpaperDrawable.setColorFilter(mColors[mColor], PorterDuff.Mode.MULTIPLY);
imageView.setImageDrawable(wallpaperDrawable);
//调用这个方法用于重新调用onDraw绘制整个界面
imageView.invalidate();
}
});

//
Button setWallpaper = (Button) findViewById(R.id.setwallpaper);
setWallpaper.setOnClickListener(new OnClickListener() {
public void onClick(View view) {
try {
//更换壁纸
wallpaperManager.setBitmap(imageView.getDrawingCache());
finish();
} catch (IOException e) {
e.printStackTrace();
}
}
});
}
}