在我的应用程序中,我面临的问题在Android 4.0 .THIS问题不面向Android 2.3以下是导致问题的步骤 - 1.我有一个主要活动TaskManagerActivity(activity 1) 2.然后我移动到另一个活动ReminderModificationActivity(活动2) 3.进行一些数据库更改并返回活动1 4.然后按退出按钮退出应用程序。无法恢复活动 - Android 4.0的非法状态异常
11-06 13:25:37.075: E/AndroidRuntime(6591): FATAL EXCEPTION: main
11-06 13:25:37.075: E/AndroidRuntime(6591): java.lang.RuntimeException: Unable to resume activity {ray.kaushik.simple.task.manager/ray.kaushik.simple.task.manager.ReminderModificationActivity}: java.lang.IllegalStateException: trying to requery an already closed cursor [email protected]
11-06 13:25:37.075: E/AndroidRuntime(6591): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2575)
11-06 13:25:37.075: E/AndroidRuntime(6591): at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2603)
11-06 13:25:37.075: E/AndroidRuntime(6591): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1237)
11-06 13:25:37.075: E/AndroidRuntime(6591): at android.os.Handler.dispatchMessage(Handler.java:99)
11-06 13:25:37.075: E/AndroidRuntime(6591): at android.os.Looper.loop(Looper.java:137)
11-06 13:25:37.075: E/AndroidRuntime(6591): at android.app.ActivityThread.main(ActivityThread.java:4745)
11-06 13:25:37.075: E/AndroidRuntime(6591): at java.lang.reflect.Method.invokeNative(Native Method)
11-06 13:25:37.075: E/AndroidRuntime(6591): at java.lang.reflect.Method.invoke(Method.java:511)
11-06 13:25:37.075: E/AndroidRuntime(6591): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
11-06 13:25:37.075: E/AndroidRuntime(6591): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
11-06 13:25:37.075: E/AndroidRuntime(6591): at dalvik.system.NativeStart.main(Native Method)
11-06 13:25:37.075: E/AndroidRuntime(6591): Caused by: java.lang.IllegalStateException: trying to requery an already closed cursor [email protected]
11-06 13:25:37.075: E/AndroidRuntime(6591): at android.app.Activity.performRestart(Activity.java:5051)
11-06 13:25:37.075: E/AndroidRuntime(6591): at android.app.Activity.performResume(Activity.java:5074)
11-06 13:25:37.075: E/AndroidRuntime(6591): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2565)
11-06 13:25:37.075: E/AndroidRuntime(6591): ... 10 more
我想我的应用程序试图加载活动2,我不想 - 当我试图再次打开该应用程序,我得到以下错误。
对BAC按下按钮代码练习1 -
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
if(isBackPressed){
moveTaskToBack(true);
mDBHelper.close();
finish();
}else{
Toast.makeText(getApplicationContext(), "Please press back again to exit application", Toast.LENGTH_SHORT).show();
isBackPressed = true;
}
return true;
}
return super.onKeyDown(keyCode, event);
}
可以sumone plz帮助我..?请精心为我的新的Android development.Thanks
为什么你需要movetasktoback? – marcinj
我认为这是一个冗余代码..我无论如何完成它。 – RayKaushik