android-studio

问题 I think the people who write the tutorials forget that the people reading them are new to the topic. We're supposed to learn about those by stepping through things, but if something goes wrong we don't know where to look for the error. I have Windows 7 Pro, I have not attempted any eclipse development for android on this machine (though I use eclipse for other things). I downloaded the Android tutorial just now, installed it with defaults (I doubled the memory size from 2G to 4G on whatever

问题 ** SOLVED **** SOLUTION IN BELOW POST ******* SOLUTION IN BELOW POST ******* ** Classmate's i get a headcache to how resolve to remove duplicate data in a listview with firebase. I need only 1 item data to show in listview. Showing to example in screen shot Actual Code: ArrayList<ShowCliente> myList = new ArrayList<>(); final ArrayAdapter<ShowCliente> arrayAdapter = new ArrayAdapter<>(getActivity(),android.R.layout.simple_list_item_1, myList); newListView.setAdapter(arrayAdapter); gDatabase

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed last year . how to convert this to fragment and add fragment to each navigation instead of text i want add fragment and change this whole code into fragment any can help with this public class QuestionPaper extends AppCompatActivity { private TextView TextMessage; private BottomNavigationView

问题 Closed . This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 6 months ago . I'm doing my first Mobile App and i have been studying java for about 2 weeks now so i'm pretty new. The app that i'm trying to make is a grocery list app. Basically, I want to sort my grocery list by department wise. For example: Fruit items will go in a fruitArray the meat

问题 I am using a file chooser to pick a WORD file downloaded from GMail, it causes the app crashed.Here's my code segment: == file chooser code == Intent intent = new Intent(); intent.setAction(Intent.ACTION_OPEN_DOCUMENT); intent.putExtra(Intent.EXTRA_LOCAL_ONLY, true); intent.addCategory(Intent.CATEGORY_OPENABLE); //sets the select file to all types of files String [] mimeTypes = {"application/pdf", "application/msword", "application/vnd.openxmlformats officedocument.wordprocessingml.document"}

问题 Got a new computer installed android studio. Created a test app (default) - No coding. I compiled and clicked the run and installed the app to the device (1+6). The app is installed but doesn't launch automatically. I checked the configuration shows launch default activity. What could be wrong? Also another strange thing: I get emulator-5556 [OFFLINE] - blinking always in select deployment target. Can someone help me fix this? Thanks! 回答1: I had the same problem and was able to solve it. The

问题 Can not Resolved FirebaseOptions.Builder().setCredentials() i have referred to answers in this link but it did not solve my problem. here's my code: FileInputStream serviceAccount = new FileInputStream("./ServiceAccountKey.json"); FirebaseOptions options = new FirebaseOptions.Builder() .setCredentials(GoogleCredentials.fromStream(serviceAccount)) .setDatabaseUrl("https://imiocr-f4522.firebaseio.com") .build(); FirebaseApp.initializeApp(options); FirebaseApp.initializeApp(options); String

问题 I am trying to create a React Native app on Android emulator. However, I keep getting the error message below when trying to start up the emulator. It crashes with the following: 16:07 ADB rejected shell command (getprop): closed 16:07 Emulator: Process finished with exit code -1073740791 (0xC0000409) Is there a way to fix this issue? Sorry I am new to android studio 回答1: Try to restartthe adb server. Go to C/users/(username)/AppData/Local/Android/Sdk/platform-tools In the command prompt by

问题 I am trying to create a React Native app on Android emulator. However, I keep getting the error message below when trying to start up the emulator. It crashes with the following: 16:07 ADB rejected shell command (getprop): closed 16:07 Emulator: Process finished with exit code -1073740791 (0xC0000409) Is there a way to fix this issue? Sorry I am new to android studio 回答1: Try to restartthe adb server. Go to C/users/(username)/AppData/Local/Android/Sdk/platform-tools In the command prompt by

问题 I added it when I made the project. AndroidX Artifact(checkBox) has not been mqt communication since then. What is the problem? Androidx is used to use BiometricPrompt. Below is my mqtt code.↓ private lateinit var mqttAndroidClient: MqttAndroidClient val CLINET_ID: String = MqttClient.generateClientId() fun connect(applicationContext : Context) { val context: Context = applicationContext mqttAndroidClient = MqttAndroidClient ( context.applicationContext,"tcp://13.124.231.98:1883", CLINET_ID )