android 远程下载桌面背景图案——URLConnection 与 setWallpaper() 搭配

主类代码:

package com.EX08;import java.net.URL;import java.net.URLConnection;import android.app.Activity;import android.app.AlertDialog;import android.content.DialogInterface;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.EditText;import android.widget.ImageView;import android.widget.TextView;public class EX08_10 extends Activity {private Button button1, button2;private EditText edittext;private ImageView imageview;private TextView textview;private Bitmap bm;@Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);setContentView(R.layout.ex08_10);/** 通过 findViewById()构造器创建 Button 和TextView、EditText、ImageView 对象 */button1 = (Button) findViewById(R.id.myButton1);button2 = (Button) findViewById(R.id.myButton2);textview = (TextView) findViewById(R.id.myText);edittext = (EditText) findViewById(R.id.myEdit);imageview = (ImageView) findViewById(R.id.myImage);button1.setOnClickListener(new Button.OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubString path = edittext.getText().toString();if (path.equals("")) {showDialog("图片网址不能为空！");} else {setImage(path, 1);}}});button2.setOnClickListener(new Button.OnClickListener() {@Overridepublic void onClick(View v) {try {String path = edittext.getText().toString();if (path.equals("")) {showDialog("网址不可以为空!");} else {/**传入 type=2 设置成桌面*/setImage(path, 2);}} catch (Exception e) {showDialog("读取错误，网址可能不是图片或网址错误!");bm = null;imageview.setImageBitmap(bm);button2.setEnabled(false);e.printStackTrace();}}});}/**获得图片 图片预览 并设置成桌面*/private void setImage(String path, int type) {try {URL url = new URL(path);URLConnection conn = url.openConnection();conn.connect();if (type == 1) {/**预览图片*/bm = BitmapFactory.decodeStream(conn.getInputStream());imageview.setImageBitmap(bm);button2.setEnabled(true);} else if (type == 2) {/**设置成桌面*/EX08_10.this.setWallpaper(BitmapFactory.decodeStream(conn.getInputStream()));bm = null;imageview.setImageBitmap(bm);button2.setEnabled(false);showDialog("桌面背景设置成功!");}} catch (Exception e) {showDialog("读取错误，网址可能不是图片，或网址错误!");bm = null;imageview.setImageBitmap(bm);button2.setEnabled(false);e.printStackTrace();}}/**弹出Dialog对话框*/private void showDialog(String mess) {new AlertDialog.Builder(EX08_10.this).setTitle("Message").setMessage(mess).setNegativeButton("确定",new DialogInterface.OnClickListener() {public void onClick(DialogInterface dialog, int which) {}}).show();}}

主配置文件代码（AndroidManifest.xml）：

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"package="com.EX08" android:versionCode="1" android:versionName="1.0"><application android:icon="@drawable/icon"android:label="@string/app_name"><activity android:name=".EX08"android:label="@string/app_name"><intent-filter><action android:name="android.intent.action.MAIN" /><categoryandroid:name="android.intent.category.LAUNCHER" /></intent-filter></activity><activity android:name="EX08_01" /><activity android:name="EX08_02" /><activity android:name="EX08_03" /><activity android:name="EX08_04" /><activity android:name="EX08_05" /><activity android:name="EX08_09" /><activity android:name="EX08_10" /></application><!-- 添加网络连接权限 --><uses-permission android:name="android.permission.INTERNET"></uses-permission><uses-permissionandroid:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" /><!-- 设置桌面背景的权限 --><uses-permissionandroid:name="android.permission.SET_WALLPAPER" /><uses-sdk android:minSdkVersion="7" /></manifest>

string.xml配置如下：

<?xml version="1.0" encoding="utf-8"?><resources><string name="hello">Hello World, EX08_02</string><string name="app_name">EX08</string><string name="load">正在载入</string><string name="str_msg">下載中....請稍候...</string><string name="str_list_url1">Google</string><string name="str_list_url2">Dubblogs</string><string name="str_list_url3">Yahoo</string><string name="str_list_url4">MSN</string><string name="str_url1">http://www.google.com</string><string name="str_url2">http://www.dubblogs.cc</string><string name="str_url3">http://www.yahoo.com</string><string name="str_url4">http://www.msn.com</string><string name="url">http://www.dubblogs.cc:8751/Android/Test/Media/mp3/test.mp3</string><string name="str_title">輸入圖片網址：</string><string name="str_button1">預覽圖片</string><string name="str_button2">設為桌面</string><string name="imageurl"><!--(gif格式) http://www.baidu.com/img/baidu_logo_jr_1003_315.gif --><!--(png格式) http://share.ooopic.com/icon/img_icon/505/Dark_Part_1_031.png -->http://www.54caizi.org/plugin/windsphoto/photofile/20086/200862023250132.jpg</string></resources>

同时支持:JPG、PNG、GIF、BMP格式的图片

效果如下:

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