to study Service Life Cycle.

remixgrjp · Oct 7, 2021 · a7ddd1d · a7ddd1d
1 parent d412ded
commit a7ddd1d
Show file tree

Hide file tree

Showing 8 changed files with 258 additions and 6 deletions.
diff --git a/.gitignore b/.gitignore
@@ -13,3 +13,4 @@
 .externalNativeBuild
 .cxx
 local.properties
+/app/release
diff --git a/README.md b/README.md
@@ -0,0 +1,15 @@
+# to study Service Life Cycle
+
+<img width="300px" src="./Service.gif" alt="ffmpeg -i Service.mp4 -vf scale=320:-1 -r 10 Service.gif">
+
+fit Android 8.0(API 26), Android 9.0(API 28) <a href="Service.V1.0.apk">Install APK</a>.
+
+## confirmed
+HTC HTL23 (Android 5.0.2)
+
+Samsung Galaxy S7 edge (Andorid 7.0)
+
+ASUS_X01AD(Android 9)
+
+## article
+https://www.remix.asia/blog/remix/2020/12/post_250.html
diff --git a/Service.V1.0.apk b/Service.V1.0.apk
diff --git a/Service.gif b/Service.gif
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
@@ -4,6 +4,9 @@
 	package="asia.remix.service"
 >
 
+	<!-- API28 -->
+	<uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
+
 	<application
 		android:allowBackup="true"
 		android:icon="@mipmap/ic_launcher"
@@ -19,6 +22,12 @@
 				<category android:name="android.intent.category.LAUNCHER" />
 			</intent-filter>
 		</activity>
+
+		<service
+			android:name=".MainService"
+			android:enabled="true"
+			android:exported="false"
+		/>
 	</application>
 
 </manifest>
diff --git a/app/src/main/java/asia/remix/service/MainActivity.java b/app/src/main/java/asia/remix/service/MainActivity.java
@@ -1,14 +1,79 @@
 package asia.remix.service;
 
-import androidx.appcompat.app.AppCompatActivity;
-
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.content.ServiceConnection;
+import android.os.Build;
 import android.os.Bundle;
+import android.os.IBinder;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+
+import androidx.appcompat.app.AppCompatActivity;
 
 public class MainActivity extends AppCompatActivity{
+	final static String TAG = "MainActivity";
 
 	@Override
 	protected void onCreate( Bundle savedInstanceState ){
 		super.onCreate( savedInstanceState );
 		setContentView( R.layout.activity_main );
 	}
+
+	boolean isServiceBound = false;
+	MainService mainService;
+	ServiceConnection connection = new ServiceConnection(){
+		@Override
+		public void onServiceConnected( ComponentName cn, IBinder ib ){
+			Log.d( TAG, "ServiceConnection#onServiceConnected()" );
+			MainService.MainBinder binder = (MainService.MainBinder)ib;
+			mainService = binder.getService();
+			isServiceBound = true;
+		}
+
+		@Override
+		public void onServiceDisconnected( ComponentName cn ){
+			Log.d( TAG, "ServiceConnection#onServiceDisconnected() Serviceが深刻なエラーで停止した" );
+			unbindMyService();
+		}
+	};
+
+	void unbindMyService(){
+		if( isServiceBound ){
+			isServiceBound = false;
+			unbindService( connection );
+		}
+	}
+
+	public void onClickServiceStart( View v ){
+		Intent intent = new Intent( getApplication(), MainService.class );
+		if( Build.VERSION.SDK_INT >= 26 ){
+			startForegroundService( intent );
+		}else{
+			startService( intent );
+		}
+	}
+
+	public void onClickServiceBind( View v ){
+		Intent intent = new Intent( getApplication(), MainService.class );
+		bindService( intent, connection, Context.BIND_AUTO_CREATE );
+	}
+
+	public void onClickServiceMethod( View v ){
+		if( isServiceBound ){
+			mainService.doMethod( "Hello MyService!" );
+		}
+	}
+
+	public void onClickServiceUnbind( View v ){
+		unbindMyService();
+	}
+
+	public void onClickServiceStop( View v ){
+		unbindMyService();
+		Intent intent = new Intent( getApplication(), MainService.class );
+		stopService( intent );
+	}
 }
diff --git a/app/src/main/java/asia/remix/service/MainService.java b/app/src/main/java/asia/remix/service/MainService.java
@@ -0,0 +1,116 @@
+package asia.remix.service;
+
+import android.app.Notification;
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
+import android.app.PendingIntent;
+import android.app.Service;
+import android.content.Context;
+import android.content.Intent;
+import android.graphics.Color;
+import android.os.Binder;
+import android.os.Build;
+import android.os.IBinder;
+import android.os.Looper;
+import android.util.Log;
+import android.widget.Toast;
+
+import androidx.annotation.RequiresApi;
+import androidx.core.app.NotificationCompat;
+
+public class MainService extends Service{
+	final static String TAG = "MainService";
+	String sChannelId = "Channel ID";
+
+	@Override
+	public void onCreate(){
+		super.onCreate();
+		Log.d( TAG, "●onCreate" );
+	}
+
+	// バインドのみ利用する場合 onStartCommand オーバーライド不要
+	@Override
+	public int onStartCommand( Intent intent, int flags, int startId ){
+		Log.d( TAG, "●onStartCommand" );
+		Context context = getApplicationContext();
+		Toast.makeText( context, "onStartCommand", Toast.LENGTH_SHORT ).show();
+		String sTitle = context.getString( R.string.app_name );
+
+		if( Build.VERSION.SDK_INT >= 26 ){
+			//API26 Android 8以上 通知を送信する前に通知チャネルを作成する必要がある
+			NotificationChannel channel
+			= new NotificationChannel( sChannelId, sTitle, NotificationManager.IMPORTANCE_DEFAULT );
+			NotificationManager notificationManager
+			= (NotificationManager)context.getSystemService( Context.NOTIFICATION_SERVICE );
+			notificationManager.createNotificationChannel( channel );
+		}
+
+		NotificationCompat.Builder builder;
+		if( Build.VERSION.SDK_INT >= 26 ){
+			builder = new NotificationCompat.Builder( context, sChannelId );
+		}else{
+			builder = new NotificationCompat.Builder( context );
+		}
+		builder.setContentTitle( sTitle );
+		builder.setSmallIcon( android.R.drawable.btn_star );
+		builder.setColor( android.graphics.Color.RED );
+		builder.setContentText( "Text" );
+		builder.setSubText( "SubText" );
+		builder.setContentInfo( "Info" );
+		builder.setTicker( "Ticker" );//通知到着時に通知バー表示(4.4まで)
+		//通知はタップ応答する必要があり、ここではMainActivityを立ち上げる
+		Intent i =new Intent( this, MainActivity.class );
+		PendingIntent pendingIntent = PendingIntent.getActivity( context, 0, i, 0 );
+		builder.setContentIntent( pendingIntent );
+
+		Notification notification = builder.build();
+		startForeground( 1, notification );//0は通知表示されない
+
+		return super.onStartCommand( intent, flags, startId );
+	}
+
+	// オーバーライド必須、バインド不要の場合はnullを返す。
+	// IBinderを継承したクラスを返す必要がある
+	@Override
+	public IBinder onBind( Intent intent ){
+		Log.d( TAG, "●onBind" );
+		Toast.makeText( getApplicationContext(), "onBind", Toast.LENGTH_SHORT ).show();
+		return new MainBinder();
+	}
+
+	@Override
+	public boolean onUnbind( Intent intent ){
+		Log.d( TAG, "●onUnbind" );
+		Toast.makeText( getApplicationContext(), "onUnbind", Toast.LENGTH_SHORT ).show();
+		return true;
+	}
+
+	@Override
+	public void onRebind( Intent intent ){
+		Log.d( TAG, "●onRebind" );
+		Toast.makeText( getApplicationContext(), "onRebind", Toast.LENGTH_SHORT ).show();
+	}
+
+	@Override
+	public void onDestroy(){
+		Log.d( TAG, "●onDestroy" );
+		Toast.makeText( getApplicationContext(), "onDestroy", Toast.LENGTH_SHORT ).show();
+		super.onDestroy();
+	}
+
+	public class MainBinder extends Binder{
+		public MainService getService(){
+			return MainService.this;
+		}
+	}
+
+	public void doMethod( String msg ){
+		Log.d( TAG, "●doMethod" );
+		Toast.makeText( getApplicationContext()
+		, String.format( "isUiThread %s / %s", isUiThread(), msg ), Toast.LENGTH_SHORT ).show();
+	}
+
+	boolean isUiThread(){
+		return Thread.currentThread() == Looper.getMainLooper().getThread();
+	}
+}
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
@@ -8,13 +8,59 @@
 	tools:context=".MainActivity"
 >
 
-	<TextView
-		android:layout_width="wrap_content"
+	<Button
+		android:id="@+id/startService"
+		android:layout_width="0dp"
 		android:layout_height="wrap_content"
-		android:text="Hello World!"
-		app:layout_constraintBottom_toBottomOf="parent"
+		android:text="Start Service"
+		app:layout_constraintTop_toTopOf="parent"
+		app:layout_constraintRight_toRightOf="parent"
+		app:layout_constraintLeft_toLeftOf="parent"
+		android:onClick="onClickServiceStart"
+	/>
+
+	<Button
+		android:id="@+id/bindService"
+		android:layout_width="0dp"
+		android:layout_height="wrap_content"
+		android:text="Bind Service"
+		app:layout_constraintTop_toBottomOf="@id/startService"
+		app:layout_constraintRight_toRightOf="parent"
+		app:layout_constraintLeft_toLeftOf="parent"
+		android:onClick="onClickServiceBind"
+	/>
+
+	<Button
+		android:id="@+id/callServiceMethod"
+		android:layout_width="0dp"
+		android:layout_height="wrap_content"
+		android:text="Call Bound Service's Method"
+		app:layout_constraintTop_toBottomOf="@id/bindService"
+		app:layout_constraintRight_toRightOf="parent"
+		app:layout_constraintLeft_toLeftOf="parent"
+		android:onClick="onClickServiceMethod"
+	/>
+
+	<Button
+		android:id="@+id/unbindService"
+		android:layout_width="0dp"
+		android:layout_height="wrap_content"
+		android:text="Unbind Service"
+		app:layout_constraintTop_toBottomOf="@id/callServiceMethod"
+		app:layout_constraintRight_toRightOf="parent"
 		app:layout_constraintLeft_toLeftOf="parent"
+		android:onClick="onClickServiceUnbind"
+	/>
+
+	<Button
+		android:id="@+id/stopService"
+		android:layout_width="0dp"
+		android:layout_height="wrap_content"
+		android:text="Stop Service"
+		app:layout_constraintTop_toBottomOf="@id/unbindService"
 		app:layout_constraintRight_toRightOf="parent"
+		app:layout_constraintLeft_toLeftOf="parent"
+		android:onClick="onClickServiceStop"
 	/>
 
 </androidx.constraintlayout.widget.ConstraintLayout>