android-activity

问题 i have one RelativeLayout and i have some views(image and edittexts) and now i want to use scrollview.this is a my xml code <RelativeLayout android:id="@+id/relativeLayout2" android:layout_width="wrap_content" android:layout_height="match_parent" android:layout_alignParentLeft="true" android:layout_alignParentRight="true" android:layout_marginTop="70dp" > <ImageView android:id="@+id/loginbtn" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@

问题 I have two activities who read the same database table. In activity A I have an AsyncTaskLoader and LoaderCallbacks objects with the following onLoadFinished code (in Scala): def onLoadFinished(loader: CursorLoader, cursor: Cursor) = { android.util.Log.d(TAG, "got results") cursor.setNotificationUri(ct.getContentResolver, observePath) cursor registerContentObserver new ContentObserver(new Handler) { override def onChange(selfChange: Boolean) = { android.util.Log.d(TAG, "change registered") if

问题 I'm an Android newbie, and I'm building an android app about tutorial and I want to include game features in it, I already have the source code for the game and i already import all the classes to my project, however when i try to run the app i got an error and it said "android.app.application java.lang.ClassCastException can not be cast to com.wglxy.example.dash1.ChuckApplication", i assume that is because i fave 2 activity called HomeActivity.java (Main) and ChuckApplication.java (second)

问题 I am having one java class in that class as soon some one purchases our application then it will start downloading and progress dialog has to appear instead it goes to some other page and when i come out of the application and when i restart then it starts downloading. Please Help me out from this mess... Thank you 回答1: Check the condition for dialog, before showing. Like this if(pDialog!=null) { if(!pDialog.isShowing()) { pDialog.show(); } } and also while removing the dialog in

问题 I am having one java class in that class as soon some one purchases our application then it will start downloading and progress dialog has to appear instead it goes to some other page and when i come out of the application and when i restart then it starts downloading. Please Help me out from this mess... Thank you 回答1: Check the condition for dialog, before showing. Like this if(pDialog!=null) { if(!pDialog.isShowing()) { pDialog.show(); } } and also while removing the dialog in

问题 Studio gives me error like below . How can I solve this? I tried other solutions . But they dont work. emulator's API : 21 . All Other API's works. But in this gives me error . When I click an item in the Navigation drawer menu , it crashes Error Output : java.lang.RuntimeException: Unable to start activity ComponentInfo{com.dd.myApplicaiton/com.d.myapplication.category.CategoryActivityDialog}: java.lang.IllegalArgumentException: AppCompat does not support the current theme features: {

问题 i m using videoView and mediaplayer but stopping mediaplayer in onPause and onResume gives me error: static MediaPlayer mediaPlayer; private VideoViewCustom videoView; @Override public void onCreate(final Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_detailvideo); context = this; videoView = (VideoViewCustom) findViewById(R.id.videoplayer); //initialize media player mediaPlayer = new MediaPlayer(); videoView.setOnPreparedListener(new

问题 I need to achieve this: I have a sqlite table with this data slno Type Level_1 Level_2 Level_3 1 Animals Cat Null /sdcard/Video 2 Animals Cat Null /sdcard/PDF 3 Birds Aves HummingBird /sdcard/video I should have a list view with Animals and Birds , clicking on Animals shows me Cat, while Bird shows me Aves. Then so on until the content - which has to be played depending on the type. Now this can be achieved by creating a lot of Activities say for Animals level - pass level_1 for Activity_2

问题 I am trying to make splash screen for my app so that I can load some data in when I am showing the splash screen .But seems there are many way of making a splash screen. 1.Make a new activity with a layout and show that activity for some time.But making another activity with a layout makes the app heavy. 2.Make a new activity with no layout and making a splash screen back ground instead as shown here 3.Make a fragment with a layout and show them as splash screen as shown here Among all these

问题 I designed an app with several activities. There is only an activity instance in the back stack at any time. When I quit the application from an activity named AcitivityOne, how could I launch the application with ActivityOne next time? 回答1: The fast method, is that in your onCreate() put those flags after setContentView() : if ((getIntent().getFlags() & Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT) != 0) { finish(); return; } Also you can create a SharedPreferences with the Activity last oppened as