我开始实现android动态壁纸,遵循互联网上的示例和教程,我不能将png背景作为壁纸。还在这里检查了类似的问题,但仍然无法使其工作。
这是代码:
public class LiveWallpaper extends WallpaperService {
/* IDs of recurces needed for animations*/
private SurfaceHolder holder;
private static final String TAG = "MyActivity";
@Override
public void onCreate() {
super.onCreate();
}
@Override
public void onDestroy() {
super.onDestroy();
}
@Override
public Engine onCreateEngine() {
return new WallpaperEngine();
}
class WallpaperEngine extends Engine {
public final Runnable mDrawWallpaper = new Runnable(){
public void run(){
drawWallpaper();
}
};
@Override
public void onCreate(SurfaceHolder surfaceHolder){
super.onCreate(surfaceHolder);
setTouchEventsEnabled(false);
loadImagesIntoMemory(R.drawable.wallpaper);
holder = getSurfaceHolder();
}
void drawWallpaperContent(Canvas c, int resourceId){
Bitmap decodeResoure = BitmapFactory.decodeResource (getResources(), resourceId);
c.drawBitmap(decodeResoure, 0, 0, null);
}
void drawWallpaper(){
final SurfaceHolder holder = getSurfaceHolder();
Canvas c = null;
c = holder.lockCanvas();
if(c!=null){
c.save();
drawWallpaperContent(c, R.drawable.wallpaper);
c.restore();
}
}
private void loadImagesIntoMemory(int resourceId){
Resources res = getResources();
BitmapFactory.decodeResource(res, resourceId);
}
@Override
public void onDestroy(){
super.onDestroy();
mHandler.removeCallbacks(mDrawWallpaper);
}
}
}
位图存放在drawable文件夹中,android sdk版本为2.2。启动动态壁纸后,我只得到“加载壁纸”而不显示壁纸图像。
有谁知道可能是什么问题?
谢谢你。DJ。