fix : reviews and revert old files

example/android/app/build.gradle

@@ -6,7 +6,7 @@ plugins {
 }
 
 android {
-    namespace = "com.example.file_picker_example"
+    namespace = "com.mr.flutter.plugin.filepicker.example"
     compileSdk = flutter.compileSdkVersion
     ndkVersion = flutter.ndkVersion
 
@@ -21,7 +21,7 @@ android {
 
     defaultConfig {
         // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
-        applicationId = "com.example.file_picker_example"
+        applicationId = "com.mr.flutter.plugin.filepicker.example"
         // You can update the following values to match your application needs.
         // For more information, see: https://flutter.dev/to/review-gradle-config.
         minSdk = flutter.minSdkVersion

example/android/app/src/debug/AndroidManifest.xml

@@ -3,5 +3,5 @@
          the Flutter tool needs it to communicate with the running application
          to allow setting breakpoints, to provide hot reload, etc.
     -->
-    <uses-permission android:name="android.permission.INTERNET"/>
-</manifest>
+    <uses-permission android:name="android.permission.INTERNET" />
+</manifest>

example/android/app/src/main/AndroidManifest.xml

@@ -1,7 +1,7 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android">
- <uses-permission android:name="android.permission.INTERNET"/>
-    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
-   
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+
 
     <application
         android:label="file_picker_example"
@@ -21,12 +21,12 @@
                  while the Flutter UI initializes. After that, this theme continues
                  to determine the Window background behind the Flutter UI. -->
             <meta-data
-              android:name="io.flutter.embedding.android.NormalTheme"
-              android:resource="@style/NormalTheme"
-              />
+                android:name="io.flutter.embedding.android.NormalTheme"
+                android:resource="@style/NormalTheme"
+            />
             <intent-filter>
-                <action android:name="android.intent.action.MAIN"/>
-                <category android:name="android.intent.category.LAUNCHER"/>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
         <!-- Don't delete the meta-data below.
@@ -42,8 +42,8 @@
          In particular, this is used by the Flutter engine in io.flutter.plugin.text.ProcessTextPlugin. -->
     <queries>
         <intent>
-            <action android:name="android.intent.action.PROCESS_TEXT"/>
-            <data android:mimeType="text/plain"/>
+            <action android:name="android.intent.action.PROCESS_TEXT" />
+            <data android:mimeType="text/plain" />
         </intent>
     </queries>
-</manifest>
+</manifest>

example/android/app/src/main/kotlin/com/mr/flutter/plugin/filepicker/example/MainActivity.kt

@@ -0,0 +1,6 @@
+package com.mr.flutter.plugin.filepicker.example
+
+import io.flutter.embedding.android.FlutterActivity
+
+class MainActivity: FlutterActivity() {
+}

example/android/build.gradle

@@ -3,6 +3,12 @@ allprojects {
         google()
         mavenCentral()
     }
+    gradle.projectsEvaluated {
+      tasks.withType(JavaCompile) {
+         options.encoding = 'UTF-8'
+         options.compilerArgs << "-Xlint:unchecked" << "-Xlint:deprecation"
+      }
+   }
 }
 
 rootProject.buildDir = "../build"