Service、Alarm Manager 和 Broadcast Receiver 之间的关系

Question

我是 Android 开发的新手，如果有人能用一些示例代码向我解释服务、警报管理器和广播接收器之间的关系，我将不胜感激。我正在开发一个 Android 应用程序，我需要每 10 分钟执行一次代码的特定部分。此外，我想确保我的应用程序不会被 Android OS 杀死，如果它由于某些原因被杀死，例如 phone 运行低 space，那么我的应用程序应该重新启动（当然是从用户离开的同一个地方）。此外，当 phone 重新启动时，应用程序应该会再次启动。

如有任何帮助，我们将不胜感激。谢谢。

Answer 1

这是设置闹钟的完整代码

    public class Alarmset extends Activity implements OnClickListener{
Button set;
TimePicker timepicker;


@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_alarmset);
        set=(Button) findViewById(R.id.set);

        set.setOnClickListener(this);
        timepicker = (TimePicker)findViewById(R.id.timepicker);
    }



@Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        if(v==set)
        {
            Calendar c = Calendar.getInstance();
            int y = c.get(Calendar.YEAR);
            int m = c.get(Calendar.MONTH);
            int d = c.get(Calendar.DAY_OF_MONTH);

            c.set(y,m,d,timepicker.getCurrentHour(),timepicker.getCurrentMinute(),00);
            setAlarm(c);
        }

private void setAlarm(Calendar targetCal){

          Intent intent = new Intent(getBaseContext(), My.class);


          PendingIntent pendingIntent = PendingIntent.getBroadcast(Alarmset.this, 0, intent, 0);
          AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);
          alarmManager.set(AlarmManager.RTC_WAKEUP, targetCal.getTimeInMillis(), pendingIntent);

         }

现在接收器 Class

public class MyReciever extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        Do Your Stuff here

    }

还有 Xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.mainmenu.Alarmset"
     >

    <Button
        android:id="@+id/set"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/timepicker"
        android:layout_below="@+id/timepicker"
        android:layout_marginTop="62dp"
        android:text="Set"
        android:textStyle="bold" />

    <TimePicker
        android:id="@+id/timepicker"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true" />
</RelativeLayout>

Service、Alarm Manager 和 Broadcast Receiver 之间的关系

Relationship among Service, Alarm Manager and Broadcast Receiver

service

android

broadcastreceiver

alarmmanager