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：
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<?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>
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清单文件：
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<?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>
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walladapter自定义适配器：
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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;
}
}
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wallactivity类：
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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;
}
}
};
}
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运行结果：
希望本文所述对大家的android程序设计有所帮助。