Question

我正在开展一个项目，我想使用alarmManager来设置闹钟我使用此代码：

ActiveRecord::Schema.define(version: 20150816211809) do

  create_table "alternatives", force: :cascade do |t|
    t.string   "name"
    t.integer  "decision_id"
    t.datetime "created_at",  null: false
    t.datetime "updated_at",  null: false
    t.decimal  "score"
  end

  add_index "alternatives", ["decision_id"], name: "index_alternatives_on_decision_id"

  create_table "decisions", force: :cascade do |t|
    t.string   "name"
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
  end

  create_table "goals", force: :cascade do |t|
    t.string   "name"
    t.boolean  "constraint",  default: false
    t.integer  "rank"
    t.decimal  "weight"
    t.integer  "decision_id"
    t.datetime "created_at",                  null: false
    t.datetime "updated_at",                  null: false
  end

  add_index "goals", ["decision_id"], name: "index_goals_on_decision_id"

  create_table "scores", force: :cascade do |t|
    t.integer  "rating"
    t.decimal  "value"
    t.integer  "decision_id"
    t.integer  "goal_id"
    t.integer  "alternative_id"
    t.datetime "created_at",     null: false
    t.datetime "updated_at",     null: false
  end

  add_index "scores", ["alternative_id"], name: "index_scores_on_alternative_id"
  add_index "scores", ["decision_id"], name: "index_scores_on_decision_id"
  add_index "scores", ["goal_id"], name: "index_scores_on_goal_id"

end

logcat的：

    package com.example.alarmdemo;

import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.PowerManager;
import android.widget.Toast;

public class Alarm 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, "");
        wl.acquire();

        // Put here YOUR code.
        Toast.makeText(context, "Alarm !!!!!!!!!!", Toast.LENGTH_LONG).show(); // For example

        wl.release();
    }

    public void SetAlarm(Context context)
    {
        AlarmManager am =( AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
        Intent i = new Intent(context, Alarm.class);
        PendingIntent pi = PendingIntent.getBroadcast(context, 0, i, 0);
        am.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), 1000 * 60 * 10, pi); // Millisec * Second * Minute
    }

    public void CancelAlarm(Context context)
    {
        Intent intent = new Intent(context, Alarm.class);
        PendingIntent sender = PendingIntent.getBroadcast(context, 0, intent, 0);
        AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
        alarmManager.cancel(sender);
    }
}



package com.example.alarmdemo;

import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.os.IBinder;

public class YourService extends Service
{
    Alarm alarm = new Alarm();
    public void onCreate()
    {
        super.onCreate();       
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) 
    {
        alarm.SetAlarm(this);
        return START_STICKY;
    }

   @Override        
   public void onStart(Intent intent, int startId)
    {
        alarm.SetAlarm(this);
    }

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


<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.alarmdemo"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="21" />
<uses-permission android:name="android.permission.WAKE_LOCK"></uses-permission>
    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <receiver  android:process=":remote" android:name="Alarm"></receiver>

    </application>

</manifest>

但它在活动线程中给出了异常。这里的任何人都可以帮我检测并纠正我的错误吗？

Answer 1

你的问题不是警报。您正在从程序中的某个位置启动某些活动，但似乎未正确注册。

如何以编程方式在android中设置闹钟？

1 个答案: