Migrating to AndroidX

android/build.gradle

@@ -7,10 +7,11 @@ buildscript {
         maven {
             url "https://maven.google.com"
         }
+        google()
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.3.3'
+        classpath 'com.android.tools.build:gradle:3.5.0'
     }
 }
 
@@ -20,21 +21,22 @@ rootProject.allprojects {
         maven {
             url "https://maven.google.com"
         }
+        google()
     }
 }
 
 apply plugin: 'com.android.library'
 
 android {
-    compileSdkVersion 25
-    buildToolsVersion '25.0.3'
+    compileSdkVersion 29
+    buildToolsVersion '29.0.2'
 
     defaultConfig {
         minSdkVersion 16
-        targetSdkVersion 25
+        targetSdkVersion 29
         versionCode 1
         versionName "1.0"
-        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+        testInstrumentationRunner 'androidx.test.runner.AndroidJUnitRunner'
     }
     lintOptions {
         disable 'InvalidPackage'

android/gradle.properties

@@ -1 +1,3 @@
+android.enableJetifier=true
+android.useAndroidX=true
 org.gradle.jvmargs=-Xmx1536M

android/gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-3.3-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.4.1-all.zip

example/android/app/build.gradle

@@ -15,8 +15,8 @@ apply plugin: 'com.android.application'
 apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
 android {
-    compileSdkVersion 25
-    buildToolsVersion '25.0.3'
+    compileSdkVersion 29
+    buildToolsVersion '29.0.2'
 
     lintOptions {
         disable 'InvalidPackage'
@@ -26,7 +26,7 @@ android {
         // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
         applicationId "com.yourcompany.contactpickerexample"
         minSdkVersion 16
-        targetSdkVersion 25
+        targetSdkVersion 29
         versionCode 1
         versionName "1.0"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
@@ -46,7 +46,7 @@ flutter {
 }
 
 dependencies {
-    androidTestCompile 'com.android.support:support-annotations:25.4.0'
-    androidTestCompile 'com.android.support.test:runner:0.5'
-    androidTestCompile 'com.android.support.test:rules:0.5'
+    androidTestImplementation 'com.android.support:support-annotations:25.4.0'
+    androidTestImplementation 'com.android.support.test:runner:0.5'
+    androidTestImplementation 'com.android.support.test:rules:0.5'
 }

example/android/build.gradle

@@ -4,10 +4,11 @@ buildscript {
         maven {
             url "https://maven.google.com"
         }
+        google()
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.3.3'
+        classpath 'com.android.tools.build:gradle:4.0.1'
     }
 }
 

example/android/gradle.properties

@@ -1 +1,3 @@
 org.gradle.jvmargs=-Xmx1536M
+android.androidTestImplementation=true
+android.useAndroidX=true

example/android/gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Fri Jun 23 08:50:38 CEST 2017
+#Mon Jan 18 13:30:23 MST 2021
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-3.3-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.1.1-all.zip

pubspec.yaml

@@ -15,4 +15,4 @@ dependencies:
 
 environment:
   sdk: ">=2.0.0-dev.28.0 <3.0.0"
-  flutter: ">=0.1.4 <2.0.0"
+  flutter: ">=1.12.13+hotfix.6 <2.0.0"