错误:
java.lang.NullPointerException
at com.lala.Home.hideLoadinganimation(Home.java:969)
at com.lala.Home.access$4(Home.java:967)
at com.lala.Home$17.onFinish(Home.java:892)
at com.loopj.android.http.AsyncHttpResponseHandler.handleMessage (AsyncHttpResponseHandler.java:180)
at com.loopj.android.http.AsyncHttpResponseHandler$1.handleMessage(AsyncHttpResponseHandler.java:86)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3687)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
at dalvik.system.NativeStart.main(Native Method)
我知道为什么会发生这种情况,就像我的应用程序完成从服务器加载数据并即将隐藏进度对话框一样,用户以某种方式隐藏/退出或转到其他应用程序。
我试图在下面的块中抓住它,但它不起作用。我错过了什么?
private void hideLoadinganimation(boolean asDialog) {
try {
if (asDialog) {
try {
pDialog.dismiss();
} catch (Exception e) {
e.printStackTrace();
// again, sometimes pDialog is null. I have no idea why as I
// can't reproduce it.
}
} else {
switcher.showPrevious();
}
} catch (Exception ee) {
ee.printStackTrace();
}
}