如何使用时间选择器设置闹钟?

Question

我的代码是

package alarmclock.alarmclock;

import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.os.Build;
import android.support.annotation.RequiresApi;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.TimePicker;
public class home extends AppCompatActivity {
TimePicker tp;
TextView tvw;
Button bt;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
tp=findViewById(R.id.time);
tvw=findViewById(R.id.tv);
bt=findViewById(R.id.btn);
bt.setOnClickListener(new View.OnClickListener() {
@RequiresApi(api = Build.VERSION_CODES.M)
@Override
public void onClick(View v) {

Intent i =new Intent(home.this,alarms.class);
startActivity(i);
String hr=String.valueOf(tp.getHour());
String m=String.valueOf(tp.getMinute());
String tame=hr+"::"+m;

tvw.setText(tame);
String str=tvw.getText().toString();
int b=Integer.parseInt(str);
PendingIntent pendingIntent=PendingIntent.getBroadcast(getApplicationContext(),123456,i,0);
AlarmManager alarmManager=(AlarmManager)getSystemService(ALARM_SERVICE);
//How to set Timing in place of System.currentTimeMills()//
alarmManager.set(AlarmManager.RTC_WAKEUP,System.currentTimeMillis(),pendingIntent);

}
});
}
}

报警 广播接收机类

package alarmclock.alarmclock;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.media.MediaPlayer;
public class alarms extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
MediaPlayer mp;
mp=MediaPlayer.create(context,R.raw.alarm);
mp.start();
}
}

Answer 1

MainActivity.java

public class MainActivity extends Activity {
TimePicker myTimePicker;
Button buttonstartSetDialog;
TextView textAlarmPrompt;
TimePickerDialog timePickerDialog;
final static int RQS_1 = 1;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textAlarmPrompt = (TextView) findViewById(R.id.alarmprompt);
buttonstartSetDialog = (Button) findViewById(R.id.startAlaram);
buttonstartSetDialog.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
textAlarmPrompt.setText("");
openTimePickerDialog(false);
}
});
}
private void openTimePickerDialog(boolean is24r) {
Calendar calendar = Calendar.getInstance();
timePickerDialog = new TimePickerDialog(MainActivity.this,
onTimeSetListener, calendar.get(Calendar.HOUR_OF_DAY),
calendar.get(Calendar.MINUTE), is24r);
timePickerDialog.setTitle("Set Alarm Time");
timePickerDialog.show();
}
OnTimeSetListener onTimeSetListener = new OnTimeSetListener() {
@Override
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
Calendar calNow = Calendar.getInstance();
Calendar calSet = (Calendar) calNow.clone();
calSet.set(Calendar.HOUR_OF_DAY, hourOfDay);
calSet.set(Calendar.MINUTE, minute);
calSet.set(Calendar.SECOND, 0);
calSet.set(Calendar.MILLISECOND, 0);
if (calSet.compareTo(calNow) <= 0) {
// Today Set time passed, count to tomorrow
calSet.add(Calendar.DATE, 1);
}
setAlarm(calSet);
}
};
private void setAlarm(Calendar targetCal) {
textAlarmPrompt.setText("nn***n" + "Alarm is set "
+ targetCal.getTime() + "n" + "***n");
Intent intent = new Intent(getBaseContext(), AlarmReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(
getBaseContext(), RQS_1, intent, 0);
AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, targetCal.getTimeInMillis(),
pendingIntent);
}  
}

接收者.java

public class AlarmReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context k1, Intent k2) {
// TODO Auto-generated method stub
Toast.makeText(k1, "Alarm received!", Toast.LENGTH_LONG).show();
}
}

main_activity.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="10dp" >
<Button
android:id="@+id/startAlaram"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Set Alaram Time" />
<TextView
android:id="@+id/alarmprompt"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textColor="#000000" />
</LinearLayout>

不要忘记将其添加到您的清单文件中

安卓清单.xml

<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/title_activity_main" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name=".AlarmReceiver" android:process=":remote" />
</application>