Android笔记:通过代码设置系统壁纸

项目中可能用到,上网上看了一些资料,整理了一下贴出来供以后自己使用,有用的拿走,不谢,
首先必须的设置权限,否则程序会崩:
允许程序设置壁纸的权限

 <uses-permission android:name="android.permission.SET_WALLPAPER"/>

代码比较简单:
testActivity代码:

package com.dfwy.cxy.picdemo;

import android.app.Activity;
import android.app.WallpaperManager;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.BitmapDrawable;
import android.os.Bundle;
import android.os.PersistableBundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;

import java.io.IOException;

/**
 * Created by cxy on 2016/12/14.
 */

public class Test extends Activity {
    private Button btn_test;
    private Bitmap bitmap;
    private ImageView iv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.suo);
        btn_test = (Button) findViewById(R.id.button);
        //把指定的图片转换成bitmap
        bitmap = BitmapFactory.decodeResource(this.getResources(),R.mipmap.tableback);
        btn_test.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                WallpaperManager manager = WallpaperManager.getInstance(Test.this);
                try {
                    manager.setBitmap(bitmap);
                    Toast.makeText(Test.this,"更改壁纸成功",Toast.LENGTH_SHORT).show();
                } catch (IOException e) {
                    e.printStackTrace();
                    Toast.makeText(Test.this,"设置失败",Toast.LENGTH_SHORT).show();
                }
            }
        });
    }
}

布局代码:


<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <Button
        android:textColor="@color/colorWhite"
        android:background="@color/colorBlue"
        android:text="更换壁纸"
        android:layout_margin="20dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/button"
        android:layout_weight="1" />

RelativeLayout>

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