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簡單說一下這次demo內容，首先做一個設置一次性鬧鐘，先得到alarmManager,打開一個時間對話框，在里面設置鬧鐘的時間，時間一到發送廣播，然后廣播接受者接到跳轉到新的activity播放音樂。接著是一個反復鬧鐘，最后是一個簡單的通知，具體代碼如下：
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 alarmManager;
private PendingIntent pendingIntent;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//獲取鬧鐘管理者
alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
}
public void setAlarm(View view){
//獲取當前系統的時間
Calendar calendar=Calendar.getInstance();
int hour=calendar.get(Calendar.HOUR_OF_DAY);
int minute=calendar.get(Calendar.MINUTE);
//彈出時間對話框
TimePickerDialog timePickerDialog=new TimePickerDialog(this, new TimePickerDialog.OnTimeSetListener() {
@Override
public void onTimeSet(TimePicker timePicker, int i, int i1) {
Calendar c=Calendar.getInstance();
c.set(Calendar.HOUR_OF_DAY,i);
c.set(Calendar.MINUTE,i1);
Intent intent=new Intent();
intent.setAction("com.zking.g150820_android28_alarm_notification.RING");
//將來時態的跳轉 ang eng ing ong
PendingIntent pendingIntent=PendingIntent.getBroadcast(MainActivity.this,0x101,intent,0);
//設置鬧鐘
alarmManager.set(AlarmManager.RTC_WAKEUP,c.getTimeInMillis(),pendingIntent);
//時間一到，發送廣播（鬧鐘響了）
//廣播接受者中（跳轉Activity）
// 跳轉Activity，在這個Activity中播放音樂
}
},hour,minute,true);
timePickerDialog.show();
}
public void setAlarmCycle(View view){
//獲取當前系統的時間
Calendar calendar=Calendar.getInstance();
int hour=calendar.get(Calendar.HOUR_OF_DAY);
int minute=calendar.get(Calendar.MINUTE);
//彈出時間對話框
TimePickerDialog timePickerDialog=new TimePickerDialog(this, new TimePickerDialog.OnTimeSetListener() {
@Override
public void onTimeSet(TimePicker timePicker, int i, int i1) {
Calendar c=Calendar.getInstance();
c.set(Calendar.HOUR_OF_DAY,i);
c.set(Calendar.MINUTE,i1);
Intent intent=new Intent();
intent.setAction("com.zking.g150820_android28_alarm_notification.RING");
//將來時態的跳轉 ang eng ing ong
pendingIntent = PendingIntent.getBroadcast(MainActivity.this,0x101,intent,0);
//設置鬧鐘
// alarmManager.set(AlarmManager.RTC_WAKEUP,c.getTimeInMillis(),pendingIntent);
//設置周期鬧鐘
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP,c.getTimeInMillis(),5000, pendingIntent);
//時間一到，發送廣播（鬧鐘響了）
//廣播接受者中（跳轉Activity）
// 跳轉Activity，在這個Activity中播放音樂
}
},hour,minute,true);
timePickerDialog.show();
}
public void cancelCycle(View view){
alarmManager.cancel(pendingIntent);
}
public void sendNotification(View view){
//實例化通知管理器
NotificationManager notificationManager= (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
//實例化通知
NotificationCompat.Builder builder=new NotificationCompat.Builder(this);
builder.setContentTitle("今日大事件");
builder.setContentText("騎士擊敗勇士奪冠");
builder.setDefaults(NotificationCompat.DEFAULT_ALL);
builder.setAutoCancel(true);
builder.setSmallIcon(android.R.drawable.ic_media_play);
builder.setContentIntent(PendingIntent.getActivity(this,0x102,new Intent(this,RingActivity.class),0));
Notification notification=builder.build();
//發送通知
notificationManager.notify(0x101,notification);
}
}
布局文件(xml)：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_main"
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"
android:orientation="vertical"
tools:context="ghq.zking.com.ghq_android_28.MainActivity">
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="設置鬧鐘(一次)"
android:onClick="setAlarm"
/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="設置鬧鐘(周期)"
android:onClick="setAlarmCycle"
/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="取消周期"
android:onClick="cancelCycle"
/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="發送通知"
android:onClick="sendNotification"
/>
</LinearLayout>
廣播接受者代碼:
public class RingReceived extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
if ("ghq.zking.com.ghq_android_28_alarm_notification.RING".equals(intent.getAction())){
//跳轉到Activity
Intent intent1=new Intent(context,RingActivity.class);
//給Intent設置標志位
intent1.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(intent1);
}
}
}
鬧鐘播放activity代碼:
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.love);
mediaPlayer.start();
}
public void stop(View view){
mediaPlayer.stop();
finish();
}
}
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持億速云。
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