Android闹钟实现

1.首先写了一个按钮

<?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"
android:orientation="vertical"
tools:context="com.chenjun.jun_0723.MainActivity">

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="设置闹钟"
android:onClick="setAlarmOnce"
></Button>
</LinearLayout>
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

<?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: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>

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

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.chenjun.jun_0723">

<application android:allowBackup="true" android:icon="@mipmap/ic_launcher"
android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round"
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=".RingArvitiy"></activity>
<receiver android:name=".RingReceiver"
android:enabled="true"
android:exported="true"
>
<intent-filter>
<action android:name="com.chenjun.jun_0723.RINC"></action>
</intent-filter>
</receiver>
</application>

</manifest>