Change way to set app name and application id for android app

.gitignore

@@ -129,3 +129,4 @@ assets/images/app_logo.png
 
 /pubspec.yaml
 /pubspec.lock
+/android/app.properties

android/app/build.gradle

@@ -30,6 +30,12 @@ if (keystorePropertiesFile.exists()) {
     keystoreProperties.load(new FileInputStream(keystorePropertiesFile))
 }
 
+def appProperties = new Properties()
+def appPropertiesFile = rootProject.file('app.properties')
+if (appPropertiesFile.exists()) {
+    keystoreProperties.load(new FileInputStream(appPropertiesFile))
+}
+
 android {
     compileSdkVersion 29
 
@@ -38,13 +44,13 @@ android {
     }
 
     defaultConfig {
-        applicationId System.getenv('APP_ANDROID_ID')
+        applicationId appProperties['id']
         minSdkVersion 21
         targetSdkVersion 29
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
-        manifestPlaceholders = [APP_NAME: System.getenv('APP_ANDROID_NAME')]
+        manifestPlaceholders = [APP_NAME: appProperties['name']]
 
         externalNativeBuild {
             cmake {

scripts/android/app_config.sh

@@ -5,6 +5,7 @@ if [ -z "$APP_ANDROID_TYPE" ]; then
         exit 1
 fi
 
+./app_properties.sh
 ./app_icon.sh
 
 CONFIG_ARGS=""

scripts/android/app_properties.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+APP_PROPERTIES_PATH=./../../android/app.properties
+
+if [ -z "$APP_ANDROID_TYPE" ]; then
+        echo "Please set APP_ANDROID_TYPE"
+        exit 1
+fi
+
+touch $APP_PROPERTIES_PATH
+
+echo -e "id=${APP_ANDROID_BUNDLE_ID}\nname=${APP_ANDROID_NAME}" > $APP_PROPERTIES_PATH