java.lang.NullPointerException (no error message) APK building
android, gradle, java
Solution
I had the same issue after adding:
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
It was because my default java version was 10:
$ java -version
java version "10.0.1" 2018-04-17
After changing to 1.8 (with sudo update-alternatives --config java) issue was fixed.
Problem
``` // Top-level build file where you can add configuration options common to all sub-projects/modules. buildscript { repositories { maven { url "https://plugins.gradle.org/m2/" } jcenter() } dependencies { classpath "gradle.plugin.me.tatarka:gradle-retrolambda:3.3.0" classpath 'com.android.tools.build:gradle:2.2.1' } } allprojects { repositories { jcenter() mavenCentral() } } task clean(type: Delete) { delete rootProject.buildDir } ``` The :app file ``` apply plugin: 'me.tatarka.retrolambda' apply plugin: 'com.android.application' android { compileSdkVersion 23 buildToolsVersion "24.0.3" compileOptions { sourceCompatibility JavaVersion.VERSION_1_8 targetCompatibility JavaVersion.VERSION_1_8 } defaultConfig { applicationId "it.univpm.gruppoids.iotforemergencyandnavigation" minSdkVersion 16 targetSdkVersion 23 versionCode 1 versionName "1.0" jackOptions { enabled true } } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } } } dependencies { compile fileTree(include: ['*.jar'], dir: 'libs') testCompile 'junit:junit:4.12' compile 'com.android.support:appcompat-v7:23.4.0' compile 'com.android.support:design:23.4.0' compile 'com.android.support:support-v4:23.4.0' compile 'com.journeyapps:zxing-android-embedded:3.2.0@aar' compile 'com.google.zxing:core:3.2.1' compile 'org.jgrapht:jgrapht-core:1.0.0' } ``` When i try to build APK it shows me: Error:A problem occurred configuring project ':app'. java.lang.NullPointerException (no error message) Is it a problem with versions? or with lamdas?? someone can help me?