I could not create a new project " Unable to resolve dependency for ':app@debug/compileClasspath' "

Question

I'm using windows 10 and Android studio version 3.2.1

I'm facing tow problems :

1- when I'm trying to update or install packages in SDK manger I get this message :

Installation did not complete successfully. see the IDE log for details

2- when I create a new project I get this error :

Unable to resolve dependency for ':app@debug/compileClasspath': Could not find any version that matches com.android.support:appcompat-v7:29.+.

Unable to resolve dependency for ':app@debugAndroidTest/compileClasspath': Could not find any version that matches com.android.support:appcompat-v7:29.+.

---

build.gradle(module) :

 apply plugin: 'com.android.application' android { compileSdkVersion 29 defaultConfig { applicationId "com.one-click.myapplication" minSdkVersion 15 targetSdkVersion 29 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(dir: 'libs', include: ['*.jar']) implementation 'com.android.support:appcompat-v7:29.+' implementation 'com.android.support.constraint:constraint-layout:1.1.3' 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' }

I tried a lot of solution but with no benefit, hope you help me

Answer 1

change implementation 'com.android.support:appcompat-v7:29.+' to below and also change the compileSdkVersion 29 to compileSdkVersion 28 and targetSdkVersion 29 to targetSdkVersion 28

implementation 'com.android.support:appcompat-v7:28.0.0' implementation 'com.android.support:support-v4:28.0.0'