您好我正在使用Android中的提醒应用程序并使用 Firebase 作为数据库。我的提醒正确设置没有任何问题但是当我从Firebase检索数据时，我得到特定日期的数据但不知道如何按时输入用户。 这是我的代码：
Miscelleneous.java
package com.example.dell.reminder;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.DatePickerDialog;
import android.app.TimePickerDialog;
import android.content.Intent;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.CalendarView;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.TimePicker;
import android.widget.Toast;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.FirebaseUser;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ValueEventListener;
import java.sql.Time;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
public class Miscelleneous extends Activity {
private static Button setting,resetting;
private EditText text;
private TextView rem1,date1,time1;
private FirebaseDatabase fdb;
private DatabaseReference db5;
private Button btn1,btn2;
private DatePickerDialog.OnDateSetListener dateSetListener;
private TimePickerDialog.OnTimeSetListener timeSetListener;
String strDate;
String timeString = "";
public static final String REM_KEY = "com.example.dell.reminder.REM_KEY";
public static final String DATE_KEY = "com.example.dell.reminder.DATE_KEY";
public static final String TIME_KEY = "com.example.dell.reminder.TIME_KEY";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.miscelleneous);
setting = (Button)findViewById(R.id.remset);
Toolbar tool = (Toolbar)findViewById(R.id.setreminder);
text = (EditText)findViewById(R.id.editText);
btn1 = (Button)findViewById(R.id.selectdate);
btn2 = (Button)findViewById(R.id.selecttime);
rem1 = (TextView)findViewById(R.id.rem1);
date1 = (TextView)findViewById(R.id.date1);
time1 = (TextView)findViewById(R.id.time11);
btn1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Calendar cal = Calendar.getInstance();
int year = cal.get(Calendar.YEAR);
int month = cal.get(Calendar.MONTH);
int day = cal.get(Calendar.DAY_OF_MONTH);
DatePickerDialog dialog = new DatePickerDialog(Miscelleneous.this,
android.R.style.Theme_DeviceDefault_Dialog_MinWidth,dateSetListener,year,month,day);
//dialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
dialog.getDatePicker().setMinDate(System.currentTimeMillis()-1000);
dialog.show();
}
});
dateSetListener = new DatePickerDialog.OnDateSetListener() {
@Override
public void onDateSet(DatePicker datePicker, int year, int month, int day) {
// Log.d("Miscelleneous","OnDateSet: mm/dd/yyyy" +month + "/" + day + "/" + year);
Calendar calendar = Calendar.getInstance();
calendar.set(year, month, day);
month = month - 1;
SimpleDateFormat format = new SimpleDateFormat("dd/MM/yyyy");
strDate = format.format(calendar.getTime());
// date = day + "/" + month + "/" + year;
btn1.setText(strDate);
}
};
btn2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Calendar cal = Calendar.getInstance();
int hours = cal.get(Calendar.HOUR_OF_DAY);
int minute = cal.get(Calendar.MINUTE);
//int second = cal.get(Calendar.SECOND);
TimePickerDialog tdialog = new TimePickerDialog(Miscelleneous.this,
android.R.style.Theme_Holo_Light_Dialog,timeSetListener,hours,minute,false);
tdialog.show();
}
});
timeSetListener = new TimePickerDialog.OnTimeSetListener() {
@Override
public void onTimeSet(TimePicker timePicker, int hours_x, int minute_x) {
//String timeString = "";
if (hours_x == 0) {
timeString = "12:"+minute_x+" "+"a.m.";
btn2.setText(timeString);
} else if (hours_x < 12) {
timeString = hours_x + ":" + minute_x +" "+ "a.m.";
btn2.setText(timeString);
} else if (hours_x == 12) {
timeString = hours_x+":"+minute_x+" "+"p.m.";
btn2.setText(timeString);
} else {
timeString = hours_x-12+ ":" + minute_x +" "+"p.m.";
btn2.setText(timeString);
}
}
};
db5 = FirebaseDatabase.getInstance().getReference().child("user1");
setting.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if(text.getText().toString().isEmpty())
Toast.makeText(getApplicationContext(),"Please write something",Toast.LENGTH_LONG).show();
else if(btn1.getText().toString().isEmpty() && btn2.getText().toString().isEmpty()) {
Toast.makeText(getApplicationContext(),"Please select date and time",Toast.LENGTH_LONG).show();
}
else if(btn1.getText().toString().isEmpty()){
Toast.makeText(getApplicationContext(),"Please select date",Toast.LENGTH_LONG).show();
}
else if(btn2.getText().toString().isEmpty()){
Toast.makeText(getApplicationContext(),"Please select time",Toast.LENGTH_LONG).show();
}
else{
final HashMap<String,String> adddata = new HashMap<String, String>();
adddata.put("Reminder",text.getText().toString());
adddata.put("Date",btn1.getText().toString());
adddata.put("Time",btn2.getText().toString());
db5.child("Users Own").setValue(adddata).addOnCompleteListener(new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
if(task.isSuccessful()){
Toast.makeText(getApplicationContext(),
"Reminder has been set successfully!!!",Toast.LENGTH_SHORT).show();
}else
{
Toast.makeText(getApplicationContext(),
"Problem in reminder setting !!",Toast.LENGTH_LONG).show();
}
}
});
retrive();
/*Intent intent = new Intent(Miscelleneous.this,History.class);
intent.putExtra(REM_KEY,validate1);
intent.putExtra(DATE_KEY,validate2);
intent.putExtra(TIME_KEY,validate3);
startActivity(intent);*/
//send();
}
}
});
}
/*private void send(){
final ArrayList<String> arrayList = new ArrayList<>();
arrayList.add(validate1);
arrayList.add(validate2);
arrayList.add(validate3);
Intent i = new Intent(Miscelleneous.this,History.class);
i.putExtra(REM_KEY,arrayList);
startActivity(i);
}*/
private void retrive(){
long current_date = System.currentTimeMillis();
long current_time = System.currentTimeMillis();
// String currentDateTimeString = DateFormat.getTimeInstance().format(new Date());
SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy");
SimpleDateFormat sdf1 = new SimpleDateFormat("hh:mm a");
String System_Date = sdf.format(current_date);
final String System_Time = sdf1.format(current_time);
String usrdate = btn1.getText().toString().trim();
final String usrtime = btn2.getText().toString().toLowerCase().trim();
// Log.d("Miscelleneous",usrtime);
// Log.d("Miscelleneous",usrdate);
if( System_Date.equals(usrdate)){
db5.child("Users Own").addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
String tim="",date="",remind="";
for (DataSnapshot cdata:dataSnapshot.getChildren()) {
remind = cdata.getValue(String.class).toString();
date = cdata.getValue(String.class).toString();
tim = cdata.getValue(String.class).toString();
}
if(usrtime.equals(System_Time)){
Log.d("Miscelleneous","actual reminder");
Log.d("Miscelleneous","Date:"+remind);
Log.d("Miscelleneous","Reminder:"+date);
Log.d("Miscelleneous","Time:"+tim);
rem1.setText("Reminder : "+remind);
date1.setText("Date : "+date);
time1.setText("Time : "+tim);
}
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
//Toast.makeText(this,"User date matches with System date",Toast.LENGTH_SHORT).show();
}
else {
//Toast.makeText(this,"User date doesn't matches with System date",Toast.LENGTH_SHORT).show();
}
}
}
请有人给我一个解决方案，
由于
答案 0 :(得分：2)
使用广播接收器并设置您获得的时间。
答案 1 :(得分：1)
您可以使用 AlarmManager 在特定时间响铃或通知用户。
private AlarmManager alarmManager;
private static Intent alarmIntent;
private static PendingIntent pendingAlarmIntent;
public void setTimings(){
private Calender alarmCalender = Calendar.getInstance();
alarmCalender.setTimeInMillis(System.currentTimeMillis());
alarmCalender.set(Calendar.HOUR_OF_DAY, "hour"); // hour=07
alarmCalender.set(Calendar.MINUTE, "minute"); // minute=01
alarmCalender.set(Calendar.SECOND, "second"); // second=0
alarmCalender.set(Calendar.MILLISECOND, "millisecond");//millisecond=0
setAlarm(AlarmManager.RTC_WAKEUP, alarmCalender, AlarmManager.INTERVAL_DAY);
}
public void setAlarm(int type, Calendar calendar, long timeInMillis){
alarmIntent = new Intent(context, yourBroadcastReciever.class);
pendingAlarmIntent = PendingIntent.getBroadcast(context, Constant.ALARM_REQUEST_CODE, alarmIntent, PendingIntent.FLAG_UPDATE_CURRENT);
alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
alarmManager.setRepeating(type, calendar.getTimeInMillis(), timeInMillis, pendingAlarmIntent);
}
要在特定时间处理闹钟，请创建“接收器”
<强> yourBroadcastReciever.class
@Override
public void onReceive(Context context, Intent intent) {
// here you handle the task when alarm ringing
}
[注意：创建警报时必须使用Intent和Pending Intent]