Android闹钟实现

1.首先写了一个按钮

2.然后写Java代码设置闹钟

package com.chenjun.jun_0723;

import android.app.AlarmManager;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.TimePickerDialog;
import android.content.Context;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.app.NotificationCompat;
import android.view.View;
import android.widget.TimePicker;

import java.util.Calendar;

public class MainActivity extends AppCompatActivity {

    private AlarmManager am;

   @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //获取闹钟管理器
        am = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
  
    }
    public void setAlarmOnce(View view){
        //获取当前系统时间
        Calendar calendar=Calendar.getInstance();
        int hoyr=calendar.get(Calendar.HOUR_OF_DAY);
        int minute=calendar.get(Calendar.MINUTE);
        //弹出时间对话框
        TimePickerDialog timePickerDialog=new TimePickerDialog(this, new TimePickerDialog.OnTimeSetListener() {
            @Override
            public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
                Calendar c=Calendar.getInstance();
                c.set(Calendar.HOUR_OF_DAY,hourOfDay);
                c.set(Calendar.MINUTE,minute);
                //设置闹钟
                PendingIntent pendingIntent=PendingIntent.getBroadcast(MainActivity.this,0x101,new Intent("com.chenjun.jun_0723.RINC"),0);
                am.set(AlarmManager.RTC_WAKEUP,c.getTimeInMillis(),pendingIntent);
            }
        },hoyr,minute,true);
        timePickerDialog.show();
    }
}

3.写一个广播

package com.chenjun.jun_0723;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;

/**
 * Created by Administrator on 2017/7/23.
 */

public class RingReceiver extends BroadcastReceiver{
    @Override
    public void onReceive(Context context, Intent intent) {
        if ("com.chenjun.jun_0723.RINC".equals(intent.getAction())){
            Log.i("test","闹钟响了!!!!!");
            Intent intent1=new Intent(context,RingArvitiy.class);
            intent1.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            context.startActivity(intent1);
        }
    }
}

4.写一个闹钟响起来的页面，闹钟响起跳转到此页面

5.跳转到这个页面播放音乐

package com.chenjun.jun_0723;

import android.media.MediaPlayer;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.view.View;

/**
 * Created by Administrator on 2017/7/23.
 */

public class RingArvitiy extends AppCompatActivity{

    private MediaPlayer mediaPlayer;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_ring);
        mediaPlayer = MediaPlayer.create(this, R.raw.c);
        mediaPlayer.start();
    }
    public void stop(View view){
        mediaPlayer.stop();
        finish();
    }
}

6.配置