29.Android-闹钟-通知（定时操作）

一.知识概要

二.具体代码实现如下:

布局文件

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"    android:orientation="vertical"    >    <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>    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="发送通知"        android:onClick="send"        /></LinearLayout>

activity_ring.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"    android:orientation="vertical"    >    <!--播放音乐的界面-->    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="小懒猪，该起床了！！！"        android:textSize="40sp"        />    <Button        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="关闭闹钟"        android:onClick="stop"        /><!--可以写手势，一滑就关闭--></LinearLayout>

Java代码

MainActivity.java

package com.zking.android29_alarm_notification;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.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.support.v7.app.NotificationCompat;import android.view.View;import android.widget.TimePicker;import java.util.Calendar;/** * 设置闹钟 * * 闹钟一响就跳广播，广播又跳了Activity */public class MainActivity extends AppCompatActivity {    private AlarmManager am;    private PendingIntent pendingIntent;    private NotificationManager notificationManager;    @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);        //获取通知管理器        notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);    }    //一次性闹钟    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);           //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：当前系统时间                       c.set(Calendar.HOUR_OF_DAY,hourOfDay);//把小时设为你选择的小时                       c.set(Calendar.MINUTE,minute);                       //2.获取到时间      hourOfDay       minute  （选择的时钟和分钟）                       //3.设置一次性闹钟                       PendingIntent pendingIntent= PendingIntent.getBroadcast(MainActivity.this,0x101,new Intent("com.zking.android29_alarm_notification.RING"),0);//上下文 请求码  启动哪一个广播 标志位                       am.set(AlarmManager.RTC_WAKEUP,c.getTimeInMillis(),pendingIntent);//RTC_WAKEUP:唤醒屏幕  getTimeInMillis():拿到这个时间点的毫秒值 pendingIntent:发送广播               }           },hour,minute,true);//上下文，监听，默认的时分秒           timePickerDialog.show();//弹出对话框    }    //周期闹钟    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.getBroadcast(MainActivity.this,0x102,new Intent("com.zking.android29_alarm_notification.RING"),0);                    am.setRepeating(AlarmManager.RTC_WAKEUP,c.getTimeInMillis(),5000, pendingIntent);//5秒响一次                }            },hour,minute,true);            timePickerDialog.show();    }    //取消周期闹钟    public void cancelAlarmRepeat(View view){        am.cancel(pendingIntent);    }    //发送通知    public void send(View view){            //实例化通知            NotificationCompat.Builder builder=new NotificationCompat.Builder(this);//v7.app.AppCompatActivity:什么继承了v7所以导v7  Builder:构造器            builder.setContentTitle("提示");//通知的标题            builder.setContentText("您中奖啦！请先汇款到XXX账号激活中奖码");//通知的内容            builder.setSmallIcon(android.R.drawable.star_on);//图标            builder.setDefaults(NotificationCompat.DEFAULT_ALL);//使用默认的震动、默认的铃声等            builder.setAutoCancel(true);//点完通知信息就消失            Notification notification=builder.build();//通知            //发送通知            notificationManager.notify(0x101,notification);//id  通知//          builder.setContentIntent() //点击通知信息跳转//          builder.setCustomContentView() //设置通知栏自定义样式    }}

RingReceiver.java

package com.zking.android29_alarm_notification;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.util.Log;/** * 响铃广播接收者 * 广播调Activity */public class RingReceiver extends BroadcastReceiver {    @Override    public void onReceive(Context context, Intent intent) {           //广播的名字:包名+随便取一个名字           if("com.zking.android29_alarm_notification.RING".equals(intent.getAction())){                 Log.i("test","闹钟响了！！！");                 //跳转到Activity中                 Intent intent2=new Intent(context,RingActivity.class);                 intent2.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);//需要把启动的新的Activity放到一个新的任务栈里面才能启动                 context.startActivity(intent2);           }    }}

RingActivity.java

package com.zking.android29_alarm_notification;import android.media.MediaPlayer;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.view.View;/** * 响铃 *一进来就播放音乐 */public class RingActivity extends AppCompatActivity {    private MediaPlayer mediaPlayer;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_ring);        mediaPlayer = MediaPlayer.create(this, R.raw.music);        mediaPlayer.start();//一进来就播放    }    public void stop(View view){//停止的方法        mediaPlayer.stop();        finish();//把自己的界面干掉    }}

清单文件AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.zking.android29_alarm_notification">    <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=".RingActivity"></activity>        <!--注册静态广播-->        <receiver android:name=".RingReceiver"            android:enabled="true"            android:exported="true"            >            <intent-filter>                <action android:name="com.zking.android29_alarm_notification.RING"></action>            </intent-filter>        </receiver>    </application></manifest>

一次性闹钟效果图

周期闹钟效果图(每隔几秒就响一次)