android开发常见问题（二）

6. Console
[2010-03-26 10:18:34 - TestMediaPlayer]Installation failed due to invalid APK file!
[2010-03-26 10:18:34 - TestMediaPlayer]Please check logcat output for more details.
[2010-03-26 10:18:34 - TestMediaPlayer]Launch canceled!
LogCat
03-26 02:18:33.950: DEBUG/asset(59): failed to open Zip archive '/data/app/vmdl10030.tmp'
03-26 02:18:33.959: WARN/PackageParser(59): Unable to read AndroidManifest.xml of /data/app/vmdl10030.tmp
03-26 02:18:33.959: WARN/PackageParser(59): java.io.FileNotFoundException: AndroidManifest.xml
03-26 02:18:33.959: WARN/PackageParser(59):     at android.content.res.AssetManager.openXmlAssetNative(Native Method)
03-26 02:18:33.959: WARN/PackageParser(59):     at android.content.res.AssetManager.openXmlBlockAsset(AssetManager.java:469)
03-26 02:18:33.959: WARN/PackageParser(59):     at android.content.res.AssetManager.openXmlResourceParser(AssetManager.java:437)
03-26 02:18:33.959: WARN/PackageParser(59):     at android.content.pm.PackageParser.parsePackageName(PackageParser.java:560)
03-26 02:18:33.959: WARN/PackageParser(59):     at com.android.server.PackageManagerService.installPackageLI(PackageManagerService.java:4237)
03-26 02:18:33.959: WARN/PackageParser(59):     at com.android.server.PackageManagerService.access$1600(PackageManagerService.java:109)
03-26 02:18:33.959: WARN/PackageParser(59):     at com.android.server.PackageManagerService$5.run(PackageManagerService.java:3768)
03-26 02:18:33.959: WARN/PackageParser(59):     at android.os.Handler.handleCallback(Handler.java:587)
03-26 02:18:33.959: WARN/PackageParser(59):     at android.os.Handler.dispatchMessage(Handler.java:92)
03-26 02:18:33.959: WARN/PackageParser(59):     at android.os.Looper.loop(Looper.java:123)
03-26 02:18:33.959: WARN/PackageParser(59):     at android.os.HandlerThread.run(HandlerThread.java:60)
03-26 02:18:33.959: ERROR/PackageManager(59): Couldn't find a package name in : /data/app/vmdl10030.tmp
根据以上提示找不到AndroidManifest.xml文件，将R.Java删除，重新运行就可以了
7.
如何避免打开键盘或横竖屏切换，active重启？
在androidmanifest.xml中的activity标签加入这个属性android:configChanges=”orientation|keyboardHidden”
然后重载onConfigurationChanged(Configuration newConfig)这个方法
public void onConfigurationChanged(Configuration config) { super.onConfigurationChanged(config); }

8.
如何处理界面的延迟动画用Thread.sleep()是不行的，要用android.os.Handler，例如：
class RefreshHandler extends Handler { public void handleMessage(Message msg) { Main.this.updateUI(); } public void sleep(long delayMillis) { this.removeMessages(0); sendMessageDelayed(obtainMessage(0), delayMillis); } };