Java 如果在picturecallback返回之前按下电源按钮，相机会崩溃

以下问题：如果在调用getPictureCallback（）方法之前按下拍照按钮后按下电源按钮，应用程序将崩溃

相机加载在如下线程中：

private class CameraHandlerThread extends HandlerThread {
    Handler mHandler = null;

    CameraHandlerThread() {
        super("CameraHandlerThread");
        start();
        mHandler = new Handler(getLooper());
    }

    synchronized void notifyCameraOpened() {
        notify();
        runOnUiThread(new Runnable() {
            public void run() {
                setCameraParameter();
            }
        });
    }

    void openCamera() {
        mHandler.post(new Runnable() {
            @Override
            public void run() {
                openAndroidCamera();
                notifyCameraOpened();
            }
        });
        try {
            wait();
        }
        catch (InterruptedException ex) {
            LogManager.e(TAG, ex.getMessage(), ex);
            CoreToastDialog.showErrorMessage(getString(R.string.FailedToLoadCamera));
        }
    }
}

我暂停时打断了线程。有没有办法解决这个问题？该漏洞只在极少数的时间变化中出现——因此，每30次尝试，它就可能工作一次

如果是PictureCallback，有没有办法解决这个问题

错误消息：

W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0x410a32a0)
W/System.err﹕ java.lang.RuntimeException: Unable to start activity ComponentInfo{DeviceListView}: java.lang.NullPointerException
W/System.err﹕ at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2110)
W/System.err﹕ at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2135)
W/System.err﹕ at android.app.ActivityThread.access$700(ActivityThread.java:140)
W/System.err﹕ at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1237)
W/System.err﹕ at android.os.Handler.dispatchMessage(Handler.java:99)
W/System.err﹕ at android.os.Looper.loop(Looper.java:137)
W/System.err﹕ at android.app.ActivityThread.main(ActivityThread.java:4921)
W/System.err﹕ at java.lang.reflect.Method.invokeNative(Native Method)

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将代码封装在qucik修复程序的try（）catch（异常e）块中。请发布崩溃堆栈将代码封装在qucik修复程序的try（）catch（异常e）块中。请发布崩溃堆栈