android stdio中闹钟的实现

1.闹钟要制作两个页面，一个是设置闹钟页面，另一个是闹钟响起后的提示页面。

（1）闹钟设置界面.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    android:layout_margin="30dp"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    xmlns:android="http://schemas.android.com/apk/res/android">
    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="闹钟"
        android:textSize="70dp"/>
    <TimePicker
        android:id="@+id/timepicker"
        android:layout_gravity="center"
        android:layout_height="wrap_content"
        android:layout_width="match_parent"
        android:timePickerMode="spinner"
        />
    <Button
        android:id="@+id/set_alarm"
        android:layout_gravity="center"
        android:layout_width="match_parent"
        android:layout_height="60dp"
        android:textSize="24dp"
        android:text="设置闹钟"
        />
</LinearLayout>
(2)闹钟响铃界面

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_height="match_parent"
    android:layout_width="match_parent"
    android:orientation="horizontal"
   >
    <Button
        android:layout_margin="40dp"
        android:id="@+id/back"
        android:layout_gravity="center"
        android:layout_height="50dp"
        android:layout_width="200dp"
        android:text="退出闹钟"
        />
</LinearLayout>

2.在java中实现闹钟的数据的读取以及响铃。

 

TimePicker timePicker = findViewById(R.id.timepicker);
Button set_alarm = findViewById(R.id.set_alarm);
set_alarm.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        Log.e(TAG, "设置闹钟完成");
        Intent intent = new Intent(/*当前处于的java.this*/.this, /*希望跳转的java*/.class);
        PendingIntent pend = PendingIntent.getActivities(/*当前处于的java*/.this, 0,
                new Intent[]{intent}, 0);
        AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
        Calendar calendar1 = Calendar.getInstance();
        calendar1.set(Calendar.HOUR_OF_DAY, timePicker.getHour());//从TimePicker获取小时至calendar1
        calendar1.set(Calendar.MINUTE, timePicker.getMinute());//从tImePicker获取分钟至calendar1
        calendar1.set(Calendar.SECOND, 0);//从TimePicker获取秒至calendar1
        alarmManager.set(AlarmManager.RTC, calendar1.getTimeInMillis(), pend);//设置闹钟
    }
});