Android 实现自定义闹钟

闹钟是手机中非常常用的应用，当然我们也可以实现它

在闹钟中分为一次闹钟和周期闹钟，顾名思义，一次闹钟就会响一次后就失效，周期闹钟就是隔一段时间后会再次响铃。

今天就给大家分享两种闹钟的基本代码：

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.android27_zhangkai_alarm_notification.MainActivity">

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="设置闹钟(一次)"
        android:onClick="setAlarmOnce"
        ></Button>
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="设置闹钟(周期)"
        android:onClick="setAlarmRepeat"
        ></Button>
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="取消周期闹钟"
        android:onClick="cancelAlarmRepeat"
        ></Button>

</LinearLayout>

MainActivity.java

package com.example.android27_zhangkai_alarm_notification;

import android.app.AlarmManager;
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.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 hour=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.example.android27_zhangkai_alarm_notification.RING"),0);
                am.set(AlarmManager.RTC_WAKEUP,c.getTimeInMillis(),pendingIntent);
            }
        },hour,minute,true);
        timePickerDialog.show();
    }

    public void setAlarmRepeat(View view){
        //获取当前系统时间
        Calendar calendar=Calendar.getInstance();
        int hour=calendar.get(Calendar.HOUR_OF_DAY);
        int minute=calendar.get(Calendar.MINUTE);

        //1.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);
                //2.获取到时间      hourOfDay       minute
                //3.设置闹钟
                PendingIntent pendingIntent = PendingIntent.getBroadcast(MainActivity.this, 0x102, new Intent("com.zking.administrator.g160628_android29_alarm_notification.RING"), 0);
                am.setRepeating(AlarmManager.RTC_WAKEUP,c.getTimeInMillis(),5000, pendingIntent);//设置五秒响一次
            }
        },hour,minute,true);
        timePickerDialog.show();
    }
    public void cancelAlarmRepeat(View view){
          am.cancel(pendingIntent);
    }
}

因为设置闹钟的页面和闹钟响铃的页面为两个Activity，所以我在此运用了广播的技术，当闹钟时间到了，触发服务发送广播给响铃的页面，然后开始响铃。

服务页面：

package com.example.android27_zhangkai_alarm_notification;

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

/**
 * Created by Administrator on 2017/7/23 0023.
 */

public class RingReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        if ("com.example.android27_zhangkai_alarm_notification.RING".equals(intent.getAction())){
            Intent intent1=new Intent(context,RingActivity.class);
            intent1.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            context.startActivity(intent1);
        }
    }
}

响铃页面：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="懒PIG，该出窝了！！！"
        android:textSize="40sp"
        />

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="停止"
        android:onClick="stop"
        />

</LinearLayout>

package com.example.android27_zhangkai_alarm_notification;

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 0023.
 */

public class RingActivity extends AppCompatActivity {

    private MediaPlayer mediaPlayer;

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

        //设置播放响铃音乐
        mediaPlayer = MediaPlayer.create(this, R.raw.c);
        mediaPlayer.start();
    }

    public void stop(View view){
        mediaPlayer.stop();
        finish();
    }
}

记得要在配置页面配置服务哟

<receiver android:name=".RingReceiver"
            android:enabled="true"
            android:exported="true"
            >
            <intent-filter>
                <action android:name="com.example.android27_zhangkai_alarm_notification.RING"></action>
            </intent-filter>
        </receiver>