Question

描述

我正在开发一个应用程序（用于测试目的），每60秒将在数据库中保存一个单词（使用SQLiteOpenHelper）。我试图通过使用AlarmManager（setRepeating）+唤醒锁（PARTIAL_WAKE_LOCK）来实现这一点。即使屏幕是黑色，应用程序也运行很重要。

我测试了我的应用程序2天，尝试了几种方法，但我有1个问题，我无法弄清楚。我得到的代码最好的结果就是我发布的内容。

我在两款不同手机上测试了这款应用程序，三星Galaxy s6边缘和HTC One M8。在三星手机上，该应用程序将运行1-5次迭代，然后完全死亡。在HTC上，它将继续运行，就好像唤醒锁正常工作一样。在我的情况下，迭代是我的AlarmManager，它每60秒拨一次电话。

注意！该应用程序确实在三星手机上运行，如果我有连接充电的USB，但这是预期的，因为CPU不会睡觉。

我的问题

如果我想实现我的描述，我会做错事吗？

版本

三星Galaxy s6 Edge Android版：6.0.1

HTC One M8 Android版：6.0.1

代码

AndroidManifest

    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.SET_ALARM"/>
    <uses-permission android:name="android.permission.WAKE_LOCK"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        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>

        <activity android:name=".Repeating_activity"/>
        <receiver android:name=".Notification_receiver"/>

    </application>



</manifest>

MainActivity

package com.example.acce.dailyrepeatinglocalnotification;

import android.app.Activity;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;

public class MainActivity extends AppCompatActivity  {

    private TextView text;
    String tag = "LifeCycleEvents";
    AlarmManager alarmManager;
    PendingIntent pendingIntent;
    boolean isAlarmRunning = false;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Log.d(tag, "In the onCreate() event");
        text = (TextView) findViewById(R.id.textView3);
    }


    public void startAlarm(View v) {
        Calendar calendar = Calendar.getInstance();
        Intent intent = new Intent(getApplicationContext(), Notification_receiver.class);
        pendingIntent = PendingIntent.getBroadcast(getApplicationContext(), 100, intent, PendingIntent.FLAG_UPDATE_CURRENT);
        alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
        alarmManager.setRepeating(AlarmManager.RTC_WAKEUP,calendar.getTimeInMillis(),60000, pendingIntent);
        Toast.makeText(this,"Alarm started", Toast.LENGTH_SHORT).show();
        isAlarmRunning = true;
    }

    public void stopAlarm(View v) {
        if(isAlarmRunning) {
            alarmManager.cancel(pendingIntent);
            Toast.makeText(this,"Alarm stopped", Toast.LENGTH_SHORT).show();
            isAlarmRunning = false;
        } else {
            Toast.makeText(this,"No alarm running!", Toast.LENGTH_SHORT).show();
        }
    }


    public void ShowAll(View view) {
        List notificationList = new ArrayList<String>();
        DatabaseHandler db = new DatabaseHandler(this);
        notificationList = db.getAllNotifications();
        int msg = notificationList.size();
        text.setText(String.valueOf(msg));
    }
}

Notification_receiver

package com.example.acce.dailyrepeatinglocalnotification;

import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.PowerManager;
import android.support.v4.app.NotificationCompat;

public class Notification_receiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {

        PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
        PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "asdasdasd");
        wl.acquire();

        DatabaseHandler db = new DatabaseHandler(context);

        db.addNotification("A new notification");

        wl.release();
    }
}

数据库处理器

package com.example.acce.dailyrepeatinglocalnotification;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

import java.util.ArrayList;
import java.util.List;

/**
 * Created by Daniel on 01-10-2016.
 */
public class DatabaseHandler extends SQLiteOpenHelper {

    // All Static variables
    // Database Version
    private static final int DATABASE_VERSION = 1;

    // Database Name
    private static final String DATABASE_NAME = "AlarmNotifications";

    // table name
    private static final String TABLE_NAME = "notifications";

    // Table Columns names
    private static final String KEY_ID = "id";
    private static final String KEY_NAME = "name";

    public DatabaseHandler(Context context) {
        super(context, DATABASE_NAME, null, DATABASE_VERSION);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        String CREATE_CONTACTS_TABLE = "CREATE TABLE " + TABLE_NAME + "("
                + KEY_ID + " INTEGER PRIMARY KEY," + KEY_NAME + " TEXT)";
        db.execSQL(CREATE_CONTACTS_TABLE);
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        // Drop older table if existed
        db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);

        // Create tables again
        onCreate(db);
    }

    // add
    public void addNotification(String name) {
        SQLiteDatabase db = this.getWritableDatabase();

        ContentValues values = new ContentValues();
        values.put(KEY_NAME, name);

        db.insert(TABLE_NAME, null, values);
        db.close();
    }

    public List getAllNotifications() {
        List<String> notifcationList = new ArrayList<String>();

        String selectQuery = "SELECT * FROM " + TABLE_NAME;

        SQLiteDatabase db = this.getWritableDatabase();
        Cursor cursor = db.rawQuery(selectQuery, null);

        if(cursor.moveToFirst()) {
            do {
                notifcationList.add(cursor.getString(1)); // the name
            } while(cursor.moveToNext());
        }
        return notifcationList;
    }


}

几分钟后Android OS关闭了Wakelock + AlarmManager

0 个答案: