Navigation between screens without previous states showing.

android/app/build.gradle

@@ -15,15 +15,15 @@ apply plugin: 'com.android.application'
 apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
 android {
-    compileSdkVersion 25
-    buildToolsVersion '25.0.0'
+    compileSdkVersion 27
+    buildToolsVersion '27.0.3'
 
     lintOptions {
         disable 'InvalidPackage'
     }
 
     defaultConfig {
-        targetSdkVersion 21
+        targetSdkVersion 27
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
         applicationId "com.dinect.checker"
     }
@@ -38,7 +38,9 @@ android {
         }
     }
 
-    // Не смог разобраться, как коомбинировать flavors в flutter при запуске
+  flavorDimensions "checker"
+
+  // Не смог разобраться, как коомбинировать flavors в flutter при запуске
 
     productFlavors {
 
@@ -185,7 +187,7 @@ flutter {
 
 dependencies {
     compile fileTree(include: ['*.jar'], dir: 'libs')
-    compile 'com.android.support:appcompat-v7:25.3.1'
+    compile 'com.android.support:appcompat-v7:27.1.0'
     compile 'com.squareup.okhttp3:okhttp:3.8.1'
     compile 'com.squareup.okio:okio:1.13.0'
     compile 'me.dm7.barcodescanner:zxing:1.9.8'