save sensor data as json file

android/app/build.gradle

@@ -8,15 +8,14 @@ plugins {
 android {
     namespace = "tw.moonjuice.light_sesnor_capture"
     compileSdk = flutter.compileSdkVersion
-    ndkVersion = flutter.ndkVersion
+    ndkVersion "25.1.8937393"
 
     compileOptions {
-        sourceCompatibility = JavaVersion.VERSION_1_8
-        targetCompatibility = JavaVersion.VERSION_1_8
+        sourceCompatibility JavaVersion.VERSION_17
+        targetCompatibility JavaVersion.VERSION_17
     }
-
     kotlinOptions {
-        jvmTarget = JavaVersion.VERSION_1_8
+        jvmTarget = 17
     }
 
     defaultConfig {

android/app/src/main/AndroidManifest.xml

@@ -1,4 +1,5 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <uses-permission android:name="android.permission.INTERNET"/>
     <application
         android:label="light_sesnor_capture"
         android:name="${applicationName}"

android/app/src/main/java/tw/moonjuice/light_sesnor_capture/MainActivity.java

@@ -1,20 +1,29 @@
 package tw.moonjuice.light_sesnor_capture;
 
+import android.Manifest;
 import android.content.Context;
+import android.content.pm.PackageManager;
 import android.hardware.Sensor;
 import android.hardware.SensorEvent;
 import android.hardware.SensorEventListener;
 import android.hardware.SensorManager;
 import android.os.Bundle;
+import android.os.Environment;
+import android.widget.Toast;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 
+import java.util.HashMap;
+import java.util.Map;
+
 import io.flutter.embedding.android.FlutterActivity;
 import io.flutter.embedding.engine.FlutterEngine;
 import io.flutter.plugin.common.EventChannel;
+import io.flutter.plugin.common.MethodCall;
+import io.flutter.plugin.common.MethodChannel;
 
-public class MainActivity extends FlutterActivity implements EventChannel.StreamHandler, SensorEventListener {
+public class MainActivity extends FlutterActivity implements EventChannel.StreamHandler, SensorEventListener, MethodChannel.MethodCallHandler {
     private Sensor mLightSensor;
     private SensorManager mSensorManager;
     private EventChannel.EventSink mEventSink;
@@ -30,24 +39,39 @@ public class MainActivity extends FlutterActivity implements EventChannel.Stream
         super.configureFlutterEngine(flutterEngine);
         EventChannel eventChannel = new EventChannel(flutterEngine.getDartExecutor().getBinaryMessenger(), "tw.moonjuice.light_sensor.stream");
         eventChannel.setStreamHandler(this);
+        MethodChannel methodChannel = new MethodChannel(flutterEngine.getDartExecutor(), "tw.moonjuice.light_sensor.method");
+        methodChannel.setMethodCallHandler(this);
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+        mSensorManager.registerListener(this, mLightSensor, SensorManager.SENSOR_DELAY_FASTEST);
+    }
+
+    @Override
+    protected void onStop() {
+        mSensorManager.unregisterListener(this);
+        super.onStop();
     }
 
     @Override
     public void onListen(Object arguments, EventChannel.EventSink events) {
         mEventSink = events;
-        mSensorManager.registerListener(this, mLightSensor, SensorManager.SENSOR_DELAY_FASTEST);
     }
 
     @Override
     public void onCancel(Object arguments) {
         mEventSink = null;
-        mSensorManager.unregisterListener(this);
     }
 
     @Override
     public void onSensorChanged(SensorEvent sensorEvent) {
         if (mEventSink != null) {
-            mEventSink.success(sensorEvent.values[0]);
+            final Map data = new HashMap();
+            data.put("lux", sensorEvent.values[0]);
+            data.put("timestamp", sensorEvent.timestamp);
+            mEventSink.success(data);
         }
     }
 
@@ -55,4 +79,22 @@ public class MainActivity extends FlutterActivity implements EventChannel.Stream
     public void onAccuracyChanged(Sensor sensor, int i) {
 
     }
+
+    @Override
+    public void onMethodCall(@NonNull MethodCall call, @NonNull MethodChannel.Result result) {
+        switch (call.method) {
+            case "getExternalDownloadsPath":
+                result.success(Environment.getExternalStoragePublicDirectory(
+                        Environment.DIRECTORY_DOWNLOADS).getAbsolutePath());
+                break;
+            case "start":
+                Toast.makeText(getContext(), "start", Toast.LENGTH_SHORT).show();
+                result.success("success");
+                break;
+            default:
+                Toast.makeText(getContext(), "stop", Toast.LENGTH_SHORT).show();
+                result.success("success");
+                break;
+        }
+    }
 }

android/gradle/wrapper/gradle-wrapper.properties

@@ -2,4 +2,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.3-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.10.2-all.zip

android/settings.gradle

@@ -18,8 +18,8 @@ pluginManagement {
 
 plugins {
     id "dev.flutter.flutter-plugin-loader" version "1.0.0"
-    id "com.android.application" version "8.1.0" apply false
-    id "org.jetbrains.kotlin.android" version "1.8.22" apply false
+    id "com.android.application" version "8.3.2" apply false
+    id "org.jetbrains.kotlin.android" version "2.0.20" apply false
 }
 
 include ":app"