title: Failed to resolve: com.android.support:appcompat-v7:29.+
body: <p><strong>Hello</strong>
  this is my first experience with android studio andI have this problem</p>
  
  <p><a href="https://i.stack.imgur.com/dhTaw.png" rel="nofollow noreferrer">enter image description here</a></p>
  
  <p>I'm using android studio 2.3.2</p>
  
  <p>I tried so many solutions but still not work</p>
  
  <p><strong>Build.gradle(project:justjava3)</strong></p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-html lang-html prettyprint-override"><code>// Top-level build file where you can add configuration options common to all sub-projects/modules.
  
  buildscript {
      repositories {
          jcenter()
  
      }
      dependencies {
          classpath 'com.android.tools.build:gradle:2.3.2'
  
          // NOTE: Do not place your application dependencies here; they belong
          // in the individual module build.gradle files
      }
  }
  
  allprojects {
      repositories {
          jcenter()
  
  
      }
  }
  
  task clean(type: Delete) {
      delete rootProject.buildDir
  }</code></pre>
  </div>
  </div>
  </p>
  
  <p><strong>Build.gradle(module:app) :</strong></p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-html lang-html prettyprint-override"><code>apply plugin: 'com.android.application'
  
  android {
      compileSdkVersion 29
      buildToolsVersion "29.0.2"
      defaultConfig {
          applicationId "com.example.majed.justjava"
          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 {
      compile fileTree(dir: 'libs', include: ['*.jar'])
      androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
          exclude group: 'com.android.support', module: 'support-annotations'
      })
      compile 'com.android.support:appcompat-v7:29.+'
      compile 'com.android.support.constraint:constraint-layout:1.0.2'
      testCompile 'junit:junit:4.12'
  }</code></pre>
  </div>
  </div>
  </p>
  
  <p><strong>Please Help Me</strong></p>