1、main_activity布局

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical"

tools:context=".MainActivity" >

android:id="@+id/tv"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="长安图片设置桌面背景" />

android:id="@+id/img"

android:layout_width="110dp"

android:layout_height="154dp"

android:src="@drawable/tf_account_main_head_bg" />

2、MainActivity

package com.example.onlogclick;

import java.io.IOException;

import javax.security.auth.PrivateCredentialPermission;

import android.os.Bundle;

import android.app.Activity;

import android.content.res.Resources.NotFoundException;

import android.view.Menu;

import android.view.View;

import android.view.View.OnLongClickListener;

import android.widget.ImageView;

import android.widget.TextView;

public class MainActivity extends Activity {

private TextView tv;

private ImageView img;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

img=(ImageView) findViewById(R.id.img);

tv=(TextView) findViewById(R.id.tv);

//长按图片修改

img.setOnLongClickListener(new OnLongClickListener() {

@Override

public boolean onLongClick(View v) {

try {

MainActivity.this.clearWallpaper();//清除已有的桌面

MainActivity.this.setWallpaper(MainActivity.this.img.getResources().openRawResource(R.drawable.tf_account_main_head_bg));//设置桌面图片

tv.setText("手机桌面已修改！！！");

} catch (NotFoundException e) {

tv.setText("手机桌面失败！！！");

} catch (IOException e) {

// TOD.opO Auto-generated catch block

e.printStackTrace();

}

return false;

}

});

}

}