Android (4) TimePickerDialog 選擇時間

1. 添加一個 Button 和 TextView：

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
    <TextView
        android:id="@+id/timeText"        
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Time"
        android:textSize="30sp"/>
    <Button
        android:id="@+id/timeButton" />        
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Time"
</LinearLayout>

2. Source code：

註冊一個 Listener 到 Button 元件。

public class MainActivity extends AppCompatActivity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        final TextView timeText = (TextView)findViewById(R.id.timeText);
        final Button timeButton = (Button)findViewById(R.id.timeButton);
        timeButton.setOnClickListener(new MyTimePicker(timeText));
    }
}

實做 onClick 和 onTimeSet：

private class MyTimePicker implements View.OnClickListener, TimePickerDialog.OnTimeSetListener {
    private TextView mTimeText;

    public MyTimePicker(TextView timeText) {
        mTimeText = timeText;
    }

    @Override
    public void onClick(View v) {
        Calendar calendar = Calendar.getInstance();
        TimePickerDialog dialog = new TimePickerDialog(
                MainActivity.this, // context
                this,              // listener
                calendar.get(Calendar.HOUR_OF_DAY),
                calendar.get(Calendar.MINUTE),
                false);
        dialog.show();
    }

    @Override
    public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
        String des = String.format("%s-%s", hourOfDay, minute);
        mTimeText.setText(des);
    }
}

3. 完整程式碼：

package com.example.ben.androidtest;

import android.app.TimePickerDialog;
import android.icu.util.Calendar;
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 MainActivity extends AppCompatActivity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        final TextView timeText = (TextView)findViewById(R.id.timeText);
        final Button timeButton = (Button)findViewById(R.id.timeButton);
        timeButton.setOnClickListener(new MyTimePicker(timeText));
    }

    private class MyTimePicker implements View.OnClickListener, TimePickerDialog.OnTimeSetListener {
        private TextView mTimeText;

        public MyTimePicker(TextView timeText) {
            mTimeText = timeText;
        }

        @Override
        public void onClick(View v) {
            Calendar calendar = Calendar.getInstance();
            TimePickerDialog dialog = new TimePickerDialog(MainActivity.this,
                    this,
                    calendar.get(Calendar.HOUR_OF_DAY),
                    calendar.get(Calendar.MINUTE),
                    false);
            dialog.show();
        }

        @Override
        public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
            String des = String.format("%s-%s", hourOfDay, minute);
            mTimeText.setText(des);
        }
    }
}