作っているアプリにバックグラウンド処理させたかったので、いろいろ試してみた。
環境:
AndroidStudio 3.4.2
compileSdkVersion 28
minSdkVersion 21
targetSdkVersion 28
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.myapplication001">
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
<service android:name=".MJobScheduler"
android:permission="android.permission.BIND_JOB_SERVICE"
android:exported="true"/>
</application>
</manifest>
MainActivity.kt
package com.example.myapplication001
import android.app.job.JobInfo
import android.app.job.JobScheduler
import android.content.ComponentName
import android.content.Context
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.widget.Button
import android.widget.Toast
class MainActivity : AppCompatActivity() {
companion object{
val JOB_ID : Int = 101
var counter : Int = 0
fun countSeconds(){
counter++
}
}
private lateinit var JobScheduler : JobScheduler
private lateinit var JobInfo : JobInfo
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
val startButton: Button = findViewById(R.id.startButton)
val stopButton: Button = findViewById(R.id.stopButton)
var cn : ComponentName = ComponentName(this,MJobScheduler::class.java)
var builder : JobInfo.Builder = android.app.job.JobInfo.Builder(JOB_ID,cn)
builder.setPeriodic(5000)
builder.setRequiredNetworkType(android.app.job.JobInfo.NETWORK_TYPE_ANY)
builder.setPersisted(true)
JobInfo = builder.build()
JobScheduler = getSystemService(Context.JOB_SCHEDULER_SERVICE) as JobScheduler
startButton.setOnClickListener {
System.out.println("スタート")
JobScheduler.schedule(JobInfo)
Toast.makeText(this,"ジョブスケジュール開始",Toast.LENGTH_LONG).show()
}
stopButton.setOnClickListener {
System.out.println("ストップ")
JobScheduler.cancel(JOB_ID)
Toast.makeText(this,"ジョブキャンセル",Toast.LENGTH_LONG).show()
}
}
}
MJobScheduler.kt
package com.example.myapplication001
import android.app.job.JobParameters
import android.app.job.JobService
import android.widget.Toast
class MJobScheduler : JobService() {
private lateinit var MJobExecuter : MJobExecuter
override fun onStopJob(p0: JobParameters?): Boolean {
MJobExecuter.cancel(true)
return false
}
override fun onStartJob(params: JobParameters?): Boolean {
MJobExecuter = object : MJobExecuter(){
override fun onPostExecute(result: String?) {
super.onPostExecute(result)
Toast.makeText(applicationContext,result,Toast.LENGTH_LONG).show()
System.out.println("ジョブ実行")
jobFinished(params,false)
}
}
MJobExecuter.execute()
return true
}
}
MJobExecuter.kt
package com.example.myapplication001
import android.os.AsyncTask
import com.example.myapplication001.MainActivity.Companion.counter
open class MJobExecuter : AsyncTask<Void, Void, String>() {
override fun doInBackground(vararg p0: Void?): String {
MainActivity.countSeconds()
return "バックグラウンドでの実行:$counter 回"
}
}