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。
