java.lang.IllegalArgumentException: Requested window android.os.BinderProxy@450b2f48 异常处理

晕死的错误，改了半天也没想到是这样的原因，基础正要呀。。。

先看一下警告信息：

07-07 08:32:19.540: WARN/WindowManager(74): Failed looking up window

07-07 08:32:19.540: WARN/WindowManager(74): java.lang.IllegalArgumentException:Requested window android.os.BinderProxy@450b2f48 does not exist

07-07 08:32:19.540: WARN/WindowManager(74): at com.android.server.WindowManagerService.windowForClientLocked(WindowManagerService.java:9293)

07-07 08:32:19.540: WARN/WindowManager(74): at com.android.server.WindowManagerService.windowForClientLocked(WindowManagerService.java:9284)

07-07 08:32:19.540: WARN/WindowManager(74): at com.android.server.WindowManagerService.relayoutWindow(WindowManagerService.java:2364)

07-07 08:32:19.540: WARN/WindowManager(74): at com.android.server.WindowManagerService$Session.relayout(WindowManagerService.java:6782)

07-07 08:32:19.540: WARN/WindowManager(74): at android.view.IWindowSession$Stub.onTransact(IWindowSession.java:117)

07-07 08:32:19.540: WARN/WindowManager(74): at com.android.server.WindowManagerService$Session.onTransact(WindowManagerService.java:6743)

07-07 08:32:19.540: WARN/WindowManager(74): at android.os.Binder.execTransact(Binder.java:288)

07-07 08:32:19.540: WARN/WindowManager(74): atdalvik.system.NativeStart.run(Native Method)

Java代码如下：

public class MyActivity extends Activity implements Runnable {
private static final int SEARCH_APP = 0;
private ProgressDialog pd;
private Handler mHandler = new Handler() {
public void handleMessage(Message msg) {
super.handleMessage(msg);
if (msg.what == SEARCH_APP) {
pd.dismiss();
}
}
};

public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.show_app_grid);

pd = ProgressDialog.show(this, "请稍候···", "正在搜索你所安装的程序···");
Thread t = new Thread(this);
t.start();

}

public void run() {
try {
Thread.sleep(3000);
} catch (InterruptedException e) {
e.printStackTrace();
}
mHandler.sendEmptyMessage(SEARCH_APP);
}
}

原因是语句Thread t = new Thread()没有谢参数，因为在实现多线时如果是实现的Runnable接口，必要Thread t = new Thread(Runnable runnable)，所以把语句Thread t = new Thread()修改为Thread t = new Thread(this)运行就正确了。