本文实例讲述了Android实现手机壁纸改变的方法。分享给大家供大家参考。具体如下：

main.xml布局文件：

<?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/clearWall" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="恢复默认墙纸" /> <ImageView android:id="@+id/currWall" android:layout_width="100px" android:layout_height="150px" android:layout_gravity="center_horizontal" /> <Button android:id="@+id/getWall" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="获取当前墙纸" /> <Gallery android:id="@+id/gallery" android:layout_width="fill_parent" android:layout_height="wrap_content" /> <Button android:id="@+id/setWall" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="设置为当前墙纸" /></LinearLayout>

清单文件：

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.ljq.activity" android:versionCode="1" android:versionName="1.0"> <application android:icon="@drawable/icon" android:label="@string/app_name"> <activity android:name=".WallActivity" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> <uses-sdk android:minSdkVersion="7" /> <!-- 设置手机墙纸权限 --> <uses-permission android:name="android.permission.SET_WALLPAPER" /></manifest>

WallAdapter自定义适配器：

package com.ljq.activity;import android.content.Context;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.Gallery;import android.widget.ImageView;public class WallAdapter extends BaseAdapter { private int[] imgIds = null; private Context context = null; public WallAdapter(int[] imgIds, Context context) { super(); this.imgIds = imgIds; this.context = context; } public int getCount() { return imgIds.length; } public Object getItem(int position) { //return imgIds[position]; return imgIds[position%imgIds.length];//可循环 } public long getItemId(int position) { return position; } public View getView(int position, View convertView, ViewGroup parent) { ImageView imageView = new ImageView(context); imageView.setBackgroundResource(imgIds[position]);// 设置ImageView的背景图片 imageView.setScaleType(ImageView.ScaleType.CENTER_CROP); imageView.setLayoutParams(new Gallery.LayoutParams(120, 120)); return imageView; }}

WallActivity类：

package com.ljq.activity;import java.io.IOException;import java.io.InputStream;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.widget.AdapterView;import android.widget.Button;import android.widget.Gallery;import android.widget.ImageView;import android.widget.AdapterView.OnItemSelectedListener;public class WallActivity extends Activity { private int[] imgIds={R.drawable.w1, R.drawable.w2, R.drawable.w3, R.drawable.w4}; private int selectIndex=-1;//被选中的图片在id数组中的索引 private ImageView currWall=null; private Gallery gallery=null; private Button clearWall=null; private Button getWall=null; private Button setWall=null; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); gallery=(Gallery)findViewById(R.id.gallery); gallery.setAdapter(new WallAdapter(imgIds, WallActivity.this)); gallery.setSpacing(5); gallery.setOnItemSelectedListener(new OnItemSelectedListener(){ public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { selectIndex = position;//记录被选中的图片索引 } public void onNothingSelected(AdapterView<?> parent) { } }); currWall=(ImageView)findViewById(R.id.currWall); clearWall=(Button)findViewById(R.id.clearWall); getWall=(Button)findViewById(R.id.getWall); setWall=(Button)findViewById(R.id.setWall); clearWall.setOnClickListener(listener); getWall.setOnClickListener(listener); setWall.setOnClickListener(listener); } View.OnClickListener listener=new View.OnClickListener(){ public void onClick(View v) { Button btn=(Button)v; switch (btn.getId()) { case R.id.clearWall://还原手机壁纸 try { WallActivity.this.clearWallpaper(); } catch (IOException e) { e.printStackTrace(); } break; case R.id.getWall://设置ImageView显示的内容为当前墙纸 currWall.setBackgroundDrawable(getWallpaper()); break; case R.id.setWall://设置墙纸 InputStream in=WallActivity.this.getResources().openRawResource(imgIds[selectIndex]); try { setWallpaper(in); } catch (IOException e) { e.printStackTrace(); } break; } } };}

运行结果：

希望本文所述对大家的Android程序设计有所帮助。