Merge pull request #3 from Flutter-Auto-Technologies/init_car

Integrated car speed sensor

android/.settings/org.eclipse.buildship.core.prefs

@@ -1,7 +1,7 @@
 arguments=
 auto.sync=false
 build.scans.enabled=false
-connection.gradle.distribution=GRADLE_DISTRIBUTION(VERSION(7.0-rc-1))
+connection.gradle.distribution=GRADLE_DISTRIBUTION(VERSION(7.1.1))
 connection.project.dir=
 eclipse.preferences.version=1
 gradle.user.home=

android/build.gradle

@@ -32,4 +32,7 @@ android {
     defaultConfig {
         minSdkVersion 16
     }
+
+    // android.car exists since Android 10 (API level 29) Revision 5.
+    useLibrary 'android.car'
 }

android/src/main/java/com/example/flutterandroidautoos/flutter_android_auto_os/FlutterAndroidAutoOsPlugin.java

@@ -1,25 +1,45 @@
 package com.example.flutterandroidautoos.flutter_android_auto_os;
 
+import android.app.Activity;
+import android.car.Car;
+import android.car.VehiclePropertyIds;
+import android.car.hardware.CarPropertyValue;
+import android.car.hardware.CarSensorManager;
+import android.car.hardware.property.CarPropertyManager;
+import android.content.Context;
+import android.content.pm.PackageManager;
+import android.util.Log;
+
 import androidx.annotation.NonNull;
+import androidx.core.app.ActivityCompat;
 
 import io.flutter.embedding.engine.plugins.FlutterPlugin;
+import io.flutter.embedding.engine.plugins.activity.ActivityAware;
+import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding;
+import io.flutter.plugin.common.BinaryMessenger;
+import io.flutter.plugin.common.EventChannel;
 import io.flutter.plugin.common.MethodCall;
 import io.flutter.plugin.common.MethodChannel;
 import io.flutter.plugin.common.MethodChannel.MethodCallHandler;
 import io.flutter.plugin.common.MethodChannel.Result;
+import io.flutter.plugin.common.PluginRegistry.RequestPermissionsResultListener;
 
 /** FlutterAndroidAutoOsPlugin */
-public class FlutterAndroidAutoOsPlugin implements FlutterPlugin, MethodCallHandler {
+public class FlutterAndroidAutoOsPlugin implements FlutterPlugin, ActivityAware, MethodCallHandler , RequestPermissionsResultListener{
   /// The MethodChannel that will the communication between Flutter and native Android
   ///
   /// This local reference serves to register the plugin with the Flutter Engine and unregister it
   /// when the Flutter Engine is detached from the Activity
   private MethodChannel channel;
+  private Car car;
+  private CarPropertyManager carPropertyManager;
+  private EventChannel carPropertyManagerChannel;
+  private FlutterPluginBinding flutterPluginBinding;
+  private ActivityPluginBinding activityPluginBinding;
 
   @Override
   public void onAttachedToEngine(@NonNull FlutterPluginBinding flutterPluginBinding) {
-    channel = new MethodChannel(flutterPluginBinding.getBinaryMessenger(), "flutter_android_auto_os");
-    channel.setMethodCallHandler(this);
+    this.flutterPluginBinding = flutterPluginBinding;
   }
 
   @Override
@@ -33,6 +53,81 @@ public void onMethodCall(@NonNull MethodCall call, @NonNull Result result) {
 
   @Override
   public void onDetachedFromEngine(@NonNull FlutterPluginBinding binding) {
+    this.flutterPluginBinding = null;
+  }
+
+  private void setupChannels(Context context, BinaryMessenger messenger) {
+//    ActivityCompat.requestPermissions(activityPluginBinding.getActivity(),new String[] {
+//            Car.PERMISSION_POWERTRAIN
+//    },0);
+
+    ActivityCompat.requestPermissions(activityPluginBinding.getActivity(),new String[] {
+            Car.PERMISSION_SPEED
+    },0);
+
+    car=Car.createCar(context);
+    carPropertyManager= (CarPropertyManager) car.getCarManager(Car.PROPERTY_SERVICE);
+    carPropertyManagerChannel=new EventChannel(messenger, "car_gear");
+    carPropertyManagerChannel.setStreamHandler(new EventChannel.StreamHandler() {
+      @Override
+      public void onListen(Object arguments, EventChannel.EventSink events) {
+        carPropertyManager.registerCallback(new CarPropertyManager.CarPropertyEventCallback(){
+          @Override
+          public void onChangeEvent(CarPropertyValue carPropertyValue) {
+            Log.d("MainActivity:", String.valueOf(carPropertyValue.getValue()));
+            Log.d("MainActivity:", String.valueOf(carPropertyValue.describeContents()));
+            Log.d("MainActivity:", String.valueOf(carPropertyValue.toString()));
+            events.success(carPropertyValue.getValue());
+          }
+
+          @Override
+          public void onErrorEvent(int i, int i1) {
+            Log.d("MainActivity:", "Received error car property event, propId="+i);
+          }
+        }, VehiclePropertyIds.PERF_VEHICLE_SPEED,CarPropertyManager.SENSOR_RATE_NORMAL);
+        Log.d("MainActivity:", "listening");
+      }
+      @Override
+      public void onCancel(Object arguments) {
+        Log.d("MainActivity:", "cancel");
+      }
+    });
+
+    channel = new MethodChannel(messenger, "flutter_android_auto_os");
+    channel.setMethodCallHandler(this);
+  }
+
+  private void teardownEventChannels() {
     channel.setMethodCallHandler(null);
+    carPropertyManagerChannel.setStreamHandler(null);
+  }
+
+  @Override
+  public void onAttachedToActivity(@NonNull ActivityPluginBinding binding) {
+    this.activityPluginBinding = binding;
+    setupChannels(flutterPluginBinding.getApplicationContext(), flutterPluginBinding.getBinaryMessenger());
+  }
+
+  @Override
+  public void onDetachedFromActivityForConfigChanges() {
+    onDetachedFromActivity();
+  }
+
+  @Override
+  public void onReattachedToActivityForConfigChanges(@NonNull ActivityPluginBinding binding) {
+    onAttachedToActivity(binding);
+  }
+
+  @Override
+  public void onDetachedFromActivity() {
+    teardownEventChannels();
+  }
+
+  @Override
+  public boolean onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
+    if (permissions[0] == Car.PERMISSION_SPEED && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
+      return true;
+    }
+    return false;
   }
 }

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

@@ -1,5 +1,9 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.example.flutterandroidautoos.flutter_android_auto_os_example">
+
+    <uses-permission android:name="android.car.permission.CAR_POWERTRAIN" />
+    <uses-permission android:name="android.car.permission.CAR_SPEED" />
+
    <application
         android:label="flutter_android_auto_os_example"
         android:icon="@mipmap/ic_launcher">

example/android/build.gradle

@@ -5,7 +5,7 @@ buildscript {
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:4.1.0'
+        classpath 'com.android.tools.build:gradle:7.0.4'
     }
 }
 

example/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-6.7-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.0.2-all.zip