android-activity

问题 I just started a new appliction using android studio .. but i need to open a web page in my application i tried using web view but it doesnt worked out... when i open my app it crashes down <WebView android:id="@+id/web_view" android:layout_width="fill_parent" android:layout_height="fill_parent" /> and i included in java class file private WebView wb; @Override protected void onCreate(Bundle savedInstanceState) { wb=(WebView)findViewById(R.id.web_view); WebSettings webSettings=wb.getSettings(

问题 I just started a new appliction using android studio .. but i need to open a web page in my application i tried using web view but it doesnt worked out... when i open my app it crashes down <WebView android:id="@+id/web_view" android:layout_width="fill_parent" android:layout_height="fill_parent" /> and i included in java class file private WebView wb; @Override protected void onCreate(Bundle savedInstanceState) { wb=(WebView)findViewById(R.id.web_view); WebSettings webSettings=wb.getSettings(

问题 I have created a PreferenceFragment with two categories and one checkbox, however, when I display it in my app, the background appears to be transparent. I can see the main activities, fields and the PreferenceFragment ones are laid over top of the ones from the main activity...what is the solution to this? In my main activity I am doing this to open the PreferenceFragment when the settings button is selected: @Override public boolean onOptionsItemSelected(MenuItem item) { //handle presses on

问题 I have created a PreferenceFragment with two categories and one checkbox, however, when I display it in my app, the background appears to be transparent. I can see the main activities, fields and the PreferenceFragment ones are laid over top of the ones from the main activity...what is the solution to this? In my main activity I am doing this to open the PreferenceFragment when the settings button is selected: @Override public boolean onOptionsItemSelected(MenuItem item) { //handle presses on

问题 I'm developing an app which in a case of crash, needs to save some data with the time of the crash. Now, I'm saving the data in onDestroy() like this: @Override protected void onDestroy() { saveState(); super.onDestroy(); } But whenever I crash my app on purpose, onDestroy() is not called and my data is not saved. My question is, how can I save my data on a crash? Which approach should I take? Because I need the time of the crash to be also saved, it's mandatory. 回答1: The

问题 I'm developing an app which in a case of crash, needs to save some data with the time of the crash. Now, I'm saving the data in onDestroy() like this: @Override protected void onDestroy() { saveState(); super.onDestroy(); } But whenever I crash my app on purpose, onDestroy() is not called and my data is not saved. My question is, how can I save my data on a crash? Which approach should I take? Because I need the time of the crash to be also saved, it's mandatory. 回答1: The

问题 When application is in background and screen is locked,I'm unable to start activity, there is no exception or warning, onCreate() is just not called. I've been struggling against this problem for while, and I think I've finally found the source of it. There is a line in logs: D/com.android.server.am.ExtraActivityManagerService: MIUILOG- Permission Denied Activity KeyguardLocked: Intent { flg=0x14010000 cmp=com.trueconf.videochat/com.trueconf.gui.activities.Call (has extras) } pkg : com

问题 When application is in background and screen is locked,I'm unable to start activity, there is no exception or warning, onCreate() is just not called. I've been struggling against this problem for while, and I think I've finally found the source of it. There is a line in logs: D/com.android.server.am.ExtraActivityManagerService: MIUILOG- Permission Denied Activity KeyguardLocked: Intent { flg=0x14010000 cmp=com.trueconf.videochat/com.trueconf.gui.activities.Call (has extras) } pkg : com

问题 When application is in background and screen is locked,I'm unable to start activity, there is no exception or warning, onCreate() is just not called. I've been struggling against this problem for while, and I think I've finally found the source of it. There is a line in logs: D/com.android.server.am.ExtraActivityManagerService: MIUILOG- Permission Denied Activity KeyguardLocked: Intent { flg=0x14010000 cmp=com.trueconf.videochat/com.trueconf.gui.activities.Call (has extras) } pkg : com

问题 I have 4 Activities: Launcher, MainActivity(SingleTask), NotificationActivity, ExampleActivity. When the user clicks on the notification, NotificationActivity opens then ExampleActivity and finishes the NotificationActivity . When I press back MainActivity opens. Now if I press back, the application gets closed. If the user then opens the app from the recent Tasks, NotificationActivity opens then ExampleActivivty . But if the user opens the app from the icon, Launcher Activity opens then