Question by Glusenstain · Nov 23, 2018 at 10:22 AM · android plugin plugins androidplugin

Can´t found android.support.v4.content.ContextCompact

Hi everyone

I have created an android library that allows to take the Build.Version of the system, for this function I have to request permissions with ContextCompat.checkSelfPermission.

When you create an android application and use this library in it it works perfectly. When generating the .aar, in unity it does not work, it gives me an error that says java.lang.ClassNotFoundException: Did not find class "android.support.v4.content.ContextCompat" on path only if it is android 8 or higher.

The the gradle I have added implementation 'com.android.support:support-v4:27.1.1'

I give you the code if show something wrong

LibraryCode

 package com.nesplora.nesplorautils;
 
 import android.Manifest;
 import android.app.Activity;
 import android.content.Context;
 import android.content.pm.PackageManager;
 import android.media.AudioManager;
 import android.os.Build;
 import android.support.v4.app.ActivityCompat;
 import android.support.v4.content.ContextCompat;
 
 public class NesploraUtils {
 
 
     public static boolean hasHeadphonesConnected(Context c){
 
         boolean connected = false;
 
         AudioManager audioManager = (AudioManager)c.getSystemService(Context.AUDIO_SERVICE);
         connected = audioManager.isWiredHeadsetOn() || audioManager.isBluetoothA2dpOn();
         return connected;
     }
 
     public static String getDeviceID(Context c){
 
         String deviceID = "";
 
 
 
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
             if (ContextCompat.checkSelfPermission(c, Manifest.permission.READ_EXTERNAL_STORAGE)
                     == PackageManager.PERMISSION_GRANTED) {
                 deviceID = Build.getSerial();
             } else {
                 ActivityCompat.requestPermissions((Activity) c, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, 1);
             }
         }
         else { // permission is automatically granted on sdk<23 upon installation
                 deviceID = Build.SERIAL;
         }
 
         return  deviceID;
     }
 
 }

Gradle build code

 apply plugin: 'com.android.library'
 
 android {
     compileSdkVersion 27
     defaultConfig {
         minSdkVersion 23
         targetSdkVersion 27
         versionCode 1
         versionName "1.0"
 
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
 
     }
     buildTypes {
         release {
             minifyEnabled false
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
     }
 }
 
 dependencies {
     implementation fileTree(include: ['*.jar'], dir: 'libs')
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'com.android.support.test:runner:1.0.2'
     androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
     implementation 'com.android.support:support-v4:27.1.1'
     implementation 'com.android.support:appcompat-v7:27.1.1'
 }

I would greatly appreciate your help, you can ask me what you want.

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