Hướng dẫn và ví dụ Android TimePickerDialog

Android TimePickerDialog
Ví dụ TimePickerDialog

1. Android TimePickerDialog

Android TimePickerDialog đặt một TimePicker trên một Dialog, nó cho phép người dùng lựa chọn một thời gian (Time). Về cơ bản không có sự khác biệt đáng kể về việc sử dụng giữa TimePickerDialog và TimePicker, nếu bạn muốn tiết kiệm không gian của ứng dụng hãy sử dụng TimePickerDialog.

TimePickerDialog được tạo ra trong thời gian chạy của ứng dụng, khi mà người dùng cần nó để chọn một thời gian. Bạn có thể tạo và hiển thị nó bằng mã Java:

TimePickerDialog (Clock Mode) (Default)

boolean is24HView = true;
int selectedHour = 10;
int selectedMinute = 20;

// Time Set Listener.
TimePickerDialog.OnTimeSetListener timeSetListener = new TimePickerDialog.OnTimeSetListener() {

    @Override
    public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
        editTextTime.setText(hourOfDay + ":" + minute );
        lastSelectedHour = hourOfDay;
        lastSelectedMinute = minute;
    }
};

// Create TimePickerDialog:
TimePickerDialog timePickerDialog = new TimePickerDialog(this,
                        timeSetListener, lastSelectedHour, lastSelectedMinute, is24HView);

// Show
timePickerDialog.show();

TimePickerDialog (Spinner Mode)

boolean is24HView = true;
int selectedHour = 10;
int selectedMinute = 20;

// Time Set Listener.
TimePickerDialog.OnTimeSetListener timeSetListener = new TimePickerDialog.OnTimeSetListener() {

    @Override
    public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
        editTextTime.setText(hourOfDay + ":" + minute );
        lastSelectedHour = hourOfDay;
        lastSelectedMinute = minute;
    }
};

// Create TimePickerDialog:
TimePickerDialog timePickerDialog = new TimePickerDialog(this,
                        android.R.style.Theme_Holo_Light_Dialog_NoActionBar,
                        timeSetListener, lastSelectedHour, lastSelectedMinute, is24HView);

// Show
timePickerDialog.show();

2. Ví dụ TimePickerDialog

Xem trước ví dụ:

24H View Mode

12H View Mode

Trên Android Studio tạo mới một project:

File > New > New Project > Empty Activity
- Name: TimePickerDialogExample
- Package name: org.o7planning.timepickerdialogexample
- Language: Java

Giao diện của ứng dụng:

activity_main.java

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
    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"
    tools:context=".MainActivity">

    <EditText
        android:id="@+id/editText_time"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="16dp"
        android:layout_marginLeft="16dp"
        android:layout_marginTop="90dp"
        android:ems="10"
        android:inputType="time"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <Button
        android:id="@+id/button_time"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="16dp"
        android:layout_marginLeft="16dp"
        android:layout_marginTop="90dp"
        android:text="Select Time"
        app:layout_constraintStart_toEndOf="@+id/editText_time"
        app:layout_constraintTop_toTopOf="parent" />

    <CheckBox
        android:id="@+id/checkBox_isSpinnerMode"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="16dp"
        android:layout_marginLeft="16dp"
        android:layout_marginTop="16dp"
        android:text="Spinner Mode?"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/editText_time" />

    <CheckBox
        android:id="@+id/checkBox_is24HView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="16dp"
        android:layout_marginLeft="16dp"
        android:layout_marginTop="16dp"
        android:text="Display TimePickerDialog in 24H mode?"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/checkBox_isSpinnerMode" />

</androidx.constraintlayout.widget.ConstraintLayout>

MainActivity.java

package org.o7planning.timepickerdialogexample;

import androidx.appcompat.app.AppCompatActivity;

import android.app.TimePickerDialog;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.TimePicker;

import java.util.Calendar;

public class MainActivity extends AppCompatActivity {

    private EditText editTextTime;
    private Button buttonTime;
    private CheckBox checkBoxIsSpinnerMode;
    private CheckBox checkBoxIs24HView;

    private int lastSelectedHour = -1;
    private int lastSelectedMinute = -1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        this.editTextTime = (EditText) this.findViewById(R.id.editText_time);
        this.buttonTime = (Button) this.findViewById(R.id.button_time);
        this.checkBoxIsSpinnerMode = (CheckBox) this.findViewById(R.id.checkBox_isSpinnerMode);
        this.checkBoxIs24HView = (CheckBox) this.findViewById(R.id.checkBox_is24HView);

        this.buttonTime.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                buttonSelectTime();
            }
        });
    }


    private void buttonSelectTime()  {
        if(this.lastSelectedHour == -1)  {
            // Get Current Time
            final Calendar c = Calendar.getInstance();
            this.lastSelectedHour = c.get(Calendar.HOUR_OF_DAY);
            this.lastSelectedMinute = c.get(Calendar.MINUTE);
        }
        final boolean is24HView = this.checkBoxIs24HView.isChecked();
        final boolean isSpinnerMode = this.checkBoxIsSpinnerMode.isChecked();

        // Time Set Listener.
        TimePickerDialog.OnTimeSetListener timeSetListener = new TimePickerDialog.OnTimeSetListener() {

            @Override
            public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
                editTextTime.setText(hourOfDay + ":" + minute );
                lastSelectedHour = hourOfDay;
                lastSelectedMinute = minute;
            }
        };

        // Create TimePickerDialog:
        TimePickerDialog timePickerDialog = null;

        // TimePicker in Spinner Mode:
        if(isSpinnerMode)  {
            timePickerDialog = new TimePickerDialog(this,
                    android.R.style.Theme_Holo_Light_Dialog_NoActionBar,
                    timeSetListener, lastSelectedHour, lastSelectedMinute, is24HView);
        }
        // TimePicker in Clock Mode (Default):
        else  {
            timePickerDialog = new TimePickerDialog(this,
                    timeSetListener, lastSelectedHour, lastSelectedMinute, is24HView);
        }

        // Show
        timePickerDialog.show();
    }

}

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