android-studio

问题 Been trying to resolve this error for hours...cant get it solved. I am a newbie to Android Studio My project level build.gradle file is as follows // Top-level build file where you can add configuration options common to all sub-projects/modules. buildscript { repositories { jcenter() maven { url "https://maven.google.com" } } dependencies { classpath 'com.android.tools.build:gradle:2.3.3' classpath 'com.google.gms:google-services:4.0.1' } } allprojects { repositories { jcenter() maven { url

问题 Bluetooth app won't run due to Null pointer exceptions. No errors, but I can't see to connect to the emulator as the app just crashes every time. Even if I try sample GitHub codes, it won't run either. I'll post code and catlog and anything else you need. Thank you for your help package com.example.bluetooth_demoproject; import android.app.Activity; import android.bluetooth.BluetoothA2dp; import android.bluetooth.BluetoothAdapter; import android.bluetooth.BluetoothDevice; import android

问题 I have downloaded the Canary version (Android Studio 4.2 Canary2) of Android Studio and can able to create Automotive Emulator for default device. When I tried to create for edited version(cloned version of default device) of Automotive emulator, it shows System image not available. Please look into my sdk setup below. 回答1: I have used Automotive Intel x86 Atom System Image with revision 4 and the issue is resolved. If I use Automotive Intel x86 Atom System Image with revision 5 , then No

问题 I am trying to create an app to allow users to register and account. I have seen this question asked a few times but i wasn't able to fix mine using the same solutions I am getting the error /AndroidRuntime: FATAL EXCEPTION: main Process: com.example.app, PID: 12181 java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String okhttp3.ResponseBody.string()' on a null object reference at com.example.app.MainActivity$1.onResponse(MainActivity.java:75) at retrofit2

问题 When ever I create an Android Emulator and attempt to run it, I get: The Emulator widgets starts for few seconds and the emulator widget displays for a very short time: "Resetting for cold boot: Emulation engine failed" Then the emulator widget disappears and a dialog pops up with: "The emulator process for AVD <emulator_name> was killed!" On that drive I have 172 GB space left. The emulator worked once, I do not know what I have changed back then. Meanwhile, I tried to reinstall Android

问题 The below snippet of code gives me error in dartpad. But the same code works fine in the course which I am doing online. I am using dart version 2.8.4. void main() { int var = operation(5,5,add); --> Error //print(operation(5,5,add)); } // class calculator { // calculator({this.operand}); // } int add(int n1, int n2) { return n1+n2; } int multiply(int n1, int n2) { return n1*n2; } int operation(int n1, int n2, Function operand){ return operand(n1, n2); } Error: Error compiling to JavaScript:

问题 I'm trying to develop an application within Android Studio on Windows 10. PROBLEM: The following string array of Thai words: String[] myTHarr = {"มาก","เชี่ยว","แน่","ม่อน","บ้าน","พูด","เลื่อย","เมื่อ","ช่ำ","แร่"}; ...when processed by the following for-each loop: for (String s:myTHarr){ //s = มาà¸� before executing any of the below code: byte[] utf8EncodedThaiArr = s.getBytes("UTF-8"); String utf8EncodedThai = new String(utf8EncodedThaiArr); //setting breakpoint here // s is still มà

问题 Note: I am a beginner in flutter and dart so please make the answers understandable When I opened the avd manager and ran the phone, it showed "unable to locate adb" and then opened the phone. (It's takes a long time to load) When I ran the program in android studio, I got these errors: (also got the same errors in flutter console) C:\Flutter SDK\flutter\bin\cache\dart-sdk\bin\dart.exe" --enable-asserts --enable-vm-service:58163 C:\Users\user\my_app\lib\main.dart lib/main.dart: Warning:

问题 I am beginner i need to show facebook banner ads in fragment can any one guide how to implement banner ads facebook activity code into fragment? public class YourApplication extends Application { @Override public void onCreate() { super.onCreate(); AudienceNetworkAds.initialize(this); adView = new AdView(this, "IMG_16_9_APP_INSTALL#YOUR_PLACEMENT_ID", AdSize.BANNER_HEIGHT_50); LinearLayout adContainer = (LinearLayout) findViewById(R.id.banner_container); adContainer.addView(adView); adView

问题 I want to upload a image to the server. But I need to send with it the username from the user that is sending the image. I have the username record in SharedPreferences, so I think I could get it: public class UploadRequest extends StringRequest { private static final String REGISTER_REQUEST_URL = "http://160.128.0.10/up.php"; private Map<String, String> params; public UploadRequest(String image, String name, Response.Listener<String> listener){ super(Method.POST, REGISTER_REQUEST_URL,