Android Service サンプル(Vibrator)

FragmentからVibratorを実行したが、Activityを終了すると、バイブレーションも終了してしまうため、サービスに処理を移行し動き続けるようにする。

https://github.com/pppiroto/KaigiUtil/tree/8d52606b8d69f2dd689888a186dda50ae530bdff

1.サービス

package info.typea.kaigiutil;

import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.os.IBinder;
import android.os.Vibrator;
import android.widget.Toast;

public class SleepDefenderService extends Service {
    private Vibrator vibrator;

    public SleepDefenderService() {
    }

    @Override
    public IBinder onBind(Intent intent) {
        throw null;
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        vibrator = (Vibrator)this.getSystemService(Context.VIBRATOR_SERVICE);
        if (!vibrator.hasVibrator()) {
            Toast.makeText(this, "no vibrator.", Toast.LENGTH_LONG).show();
        } else {
            Toast.makeText(this, "start vibe as service", Toast.LENGTH_SHORT).show();
            long pattern[] = {1000, 100};
            int repeatIndex = 0; // 繰り返し開始位置 -1の場合繰り返しなし
            vibrator.vibrate(pattern, repeatIndex);
        }
        return START_STICKY;
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        vibrator.cancel();
        Toast.makeText(this, "stop vibe as service", Toast.LENGTH_SHORT).show();
    }
}

1.1 AndroidManifest.xml の application エントリーの子要素に、以下を追加

        <service
            android:name=".SleepDefenderService"
            android:enabled="true"
            android:exported="true"></service>

2.Fragment

Vibratorを操作していた、Fragmentを、サービスの呼び出しと停止に変更

package info.typea.kaigiutil;

import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;


public class SleepDefenderFragment extends Fragment implements View.OnClickListener {
    private static final String ARG_MSG = "message";

    public SleepDefenderFragment() {
    }

    public static SleepDefenderFragment newInstance(String message) {
        SleepDefenderFragment fragment = new SleepDefenderFragment();
        Bundle args = new Bundle();
        args.putString(ARG_MSG, message);
        fragment.setArguments(args);
        return fragment;
    }

    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        super.onCreateView(inflater, container, savedInstanceState);
        return inflater.inflate(R.layout.fragment_sleep_defender, container, false);
    }

    @Override
    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);

        view.findViewById(R.id.btn_vib_start).setOnClickListener(this);
        view.findViewById(R.id.btn_vib_stop).setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        Intent intent = new Intent(this.getContext(), SleepDefenderService.class);

        switch(v.getId()) {
            case R.id.btn_vib_start:
                this.getContext().startService(intent);
                break;

            case R.id.btn_vib_stop:
                this.getContext().stopService(intent);
                break;
        }
    }
}