android

问题 I am developing an application in which I want to display current location using marker in my map. I am using Google Map v2. Here I can display Map and marker when GPS is off ,but not visible any marker on map when GPS on. My requirement is display marker on map with current position I tried like this, @Override public void onLocationChanged(Location location) { // TODO Auto-generated method stub //locationManger.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, this); ArrayList

问题 I am using MPAndroidChart library for my project. Is it possible to rotate the labels of the XAxis by 270 degrees so that I can fit more text? 回答1: Original answer: Unfortunately it is currently not possible to rotate the values on the x-axis of a chart to a certain degree / angle. You will have to implement such a feature yourself. UPDATE: As of v2.1.5 this feature is now available: XAxis xAxis = chart.getXAxis(); xAxis.setLabelRotationAngle(...); 回答2: do it simply by XAxis xAxis=barChart

问题 I have a problem. My activity has style <style name="MaterialTheme" parent="Theme.AppCompat.Light.DarkActionBar"> <item name="colorPrimary">@color/action_bar_background</item> <item name="colorPrimaryDark">@color/action_bar_background</item> <item name="colorAccent">@color/action_bar_background</item> </style> also i have dialogFragment with simple single-choice chooser. @Override public Dialog onCreateDialog(final Bundle savedInstanceState) { final AlertDialog.Builder dialog = new

问题 Using retrofit I want to make POST request to http://milzinas.lt/oauthsilent/authorize . This URL is special because it redirects you to http://milzinas.e-bros.lt/oauthsilent/authorize . My retrofit setup uses OkHttpClient . If I make request using OkHttpClient only then redirecting works fine, i.e. 401 status code is received. However, when I use the same OkHttpClient with retrofit then response is status code 307. I think this has something to do with OkClient implementation which wraps the

问题 I've been beating my head against this issue for quite awhile... I am updating an app that uses DownloadManger to do a simple task like downloading a file to the external storage public directory i.e: Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS) Everything works fine here from Android api 19-28. Its when testing on API 29 (Q/10) is where issues occur. Android implemented scoped storage and so deprecated the getExternalStoragePublicDirectory... As a result I

问题 How do I implement an onMenuItemClickListener ? @Override public boolean onCreateOptionsMenu(Menu menu) { super.onCreateOptionsMenu(menu); getMenuInflater().inflate(R.menu.gameoptions, menu); menu.findItem(R.id.menu_item).setIntent(new Intent(this, QMenuActivity.class)); menu.findItem(R.id.back_item).setOnMenuItemClickListener; return true; } I want the back_item once clicked on to call a function within the page, how do I do it? 回答1: I'm assuming you want to access a non-static function in

问题 Context: We have a cordova application loading an online website. (We basically use cordova for the plugins) We store a cookie using $cookies.put() It works fine in desktop browsers and on iOS (as long we use expiration on the cookie) Problem: On Android if the user kill the application with 30 seconds after $cookies.put() is called the cookie will be gone on the next reboot. If the user wait more than 30 seconds (like 35 seconds or more) everything works fine. Question: How can we force the

问题 Why would one use the AlertDialog.Builder class rather than the methods directly available to AlertDialog , For example, why use AlertDialog.Builder.setCancellable rather than AlertDialog.setCancellable ? Surely this is a case of redundancy? 回答1: Because AlertDialog.setCancellable returns void and AlertDialog.Builder.setCancellable returns an AlertDialog.Builder . This means that the builder allows you to chain a bunch of settings with a little less verbosity. It's just a convenience class

问题 In my app, I have Fragment which is inside ViewPager. Fragment contains RecyclerView with list of data fetched from web api based on user selection. On my Fragment onSaveInstanceState I save list data to Bunde, to keep the data on configuration changes etc. public void onSaveInstanceState(Bundle savedState) { super.onSaveInstanceState(savedState); savedState.putParcelableArrayList(LIST_STORAGE_KEY, new ArrayList<>(mItemAdapter.getModels())); } Now I have started to see

问题 I have an Activity containing a ViewFlipper and would like to show a different option menu for each view in that ViewFlipper . That is, the type of menu displayed when the menu button is pressed would depend on the type of the current view. However, onCreateOptionsMenu() is called only once (when showing the option menu for the first time), so creating the different menus can't be implemented there. How could I solve this? Any suggestions appreciated. 回答1: First read about