桌面设置授权操作：
<uses-permission android:name="android.permission.SET_WALLPAPER"/>
MyLongClickDemo.java:
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnLongClickListener;
import android.widget.ImageView;
import android.widget.TextView;
public class MyLongClickDemo extends Activity {
private TextView info = null;
private ImageView img = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
super.setContentView(R.layout.main);
this.img = (ImageView) super.findViewById(R.id.img);
this.info = (TextView) super.findViewById(R.id.info);
this.img.setOnLongClickListener(new OnLongClickListenerImpl());
}
private class OnLongClickListenerImpl implements OnLongClickListener {
public boolean onLongClick(View v) {
try {
MyLongClickDemo.this.clearWallpaper(); // 清除已有的桌面
MyLongClickDemo.this.setWallpaper(MyLongClickDemo.this.img
.getResources().openRawResource(R.drawable.mldn_bg)); // 设置桌面
MyLongClickDemo.this.info.setText("手机桌面背景已修改。");
} catch (Exception e) {
e.printStackTrace() ;
MyLongClickDemo.this.info.setText("手机桌面背景设置失败。");
}
return false;
}
}
}
main.xml:
<?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">
<TextView
android:id="@+id/info"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="长按图片将设置为桌面背景" />
<ImageView
android:id="@+id/img"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:src="@drawable/mldn_bg"/>
</LinearLayout>
