android-studio

问题 I am new to android programming and have been having a lot of trouble with it. I finally got my app to work in the emulator on both API 23 and 16 my target is API 16. It runs with no problems on the emulators but when I try to use it on my phone (Google Nexus 5 API 23) <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match

问题 I have an activity with some final variables. I extracted their values (let's assume they're all Strings) into a resources file. The problem: If I directly assign them on the instantiation (as following): private final String PREFERENCE_NAME = getResources().getString(R.string.preference_name); I get the following error: Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.Resources android.content.Context.getResources()' on a null object reference

问题 I have an activity with some final variables. I extracted their values (let's assume they're all Strings) into a resources file. The problem: If I directly assign them on the instantiation (as following): private final String PREFERENCE_NAME = getResources().getString(R.string.preference_name); I get the following error: Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.Resources android.content.Context.getResources()' on a null object reference

问题 I need to show badge on App icon in my application what i have tried: This https://github.com/leolin310148/ShortcutBadger library do it on many devices.I have checked its manifest and saw that there exists a permission for each type of launcher <!--for Samsung--> <uses-permission android:name="com.sec.android.provider.badge.permission.READ"/> <uses-permission android:name="com.sec.android.provider.badge.permission.WRITE"/> <!--for htc--> <uses-permission android:name="com.htc.launcher

问题 I need to show badge on App icon in my application what i have tried: This https://github.com/leolin310148/ShortcutBadger library do it on many devices.I have checked its manifest and saw that there exists a permission for each type of launcher <!--for Samsung--> <uses-permission android:name="com.sec.android.provider.badge.permission.READ"/> <uses-permission android:name="com.sec.android.provider.badge.permission.WRITE"/> <!--for htc--> <uses-permission android:name="com.htc.launcher

问题 I need to show badge on App icon in my application what i have tried: This https://github.com/leolin310148/ShortcutBadger library do it on many devices.I have checked its manifest and saw that there exists a permission for each type of launcher <!--for Samsung--> <uses-permission android:name="com.sec.android.provider.badge.permission.READ"/> <uses-permission android:name="com.sec.android.provider.badge.permission.WRITE"/> <!--for htc--> <uses-permission android:name="com.htc.launcher

问题 I need to show badge on App icon in my application what i have tried: This https://github.com/leolin310148/ShortcutBadger library do it on many devices.I have checked its manifest and saw that there exists a permission for each type of launcher <!--for Samsung--> <uses-permission android:name="com.sec.android.provider.badge.permission.READ"/> <uses-permission android:name="com.sec.android.provider.badge.permission.WRITE"/> <!--for htc--> <uses-permission android:name="com.htc.launcher

问题 I have a project where I mix and match regular Android Gradle Plugin: apply plugin: 'com.android.library' and Experimental Gradle Plugin as a library: apply plugin: 'com.android.model.library' In my overall build.gradle I have the following dependencies: buildscript { repositories { jcenter() } dependencies { classpath 'com.google.gms:google-services:3.0.0' classpath 'com.android.tools.build:gradle-experimental:0.7.2' classpath 'com.android.tools.build:gradle:2.1.3' } } And now after upgrade

问题 I know that this is unlikely the correct place to ask, but I don't know where I should. So I have a normal macbook from 2016. I had Android studio installed a couple of months and worked with it just fine for a long time. Now upgrading to Mojave, Android Studio doesn't open anymore. I reinstalled it already 5 times, tried everything I found in the internet but still not able to start it. After installing and moving it to applications It asks me to open it, I accept and then it starts to

问题 I'm trying to make use of SignalR in Android Studio and while it apparently has added the projects and dependencies to my application project I'm getting constant Error:(11, 39) error: package microsoft.aspnet.signalr.client does not exist The import for these packages was dynamically added by Android studio as I started typing code to make use of it Platform.loadPlatformComponent(new AndroidPlatformComponent()); So there is something there. However when I try and actually build my main