android 通過TimePickerDialog修改時間

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初學android，寫了個修改時間的小程式，實現如下；

 

 

點擊change按鈕，彈出時間對話方塊；

 

然後點擊Done，設定顯示時間；

 

實現方式有兩種，

一種是使用showDialog方法，不過此種方法已到期，但還可以用；

另一種是使用DialogFragment類來實現；

 

先看第二種方式：

其中layout的activity_main.xml配置為：

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:layout_width="match_parent"    android:layout_height="match_parent"    >    <TextView          android:id="@+id/timepicker_display"        android:layout_width="match_parent"         android:layout_height="wrap_content"         android:gravity="center"        android:textSize="20sp"        />     <Button         android:id="@+id/button_timepicker"         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:text="change "     /></LinearLayout>

 

MainActivity.java：

package com.process.processbar;import java.util.Calendar;import android.app.Activity;import android.app.Dialog;import android.app.DialogFragment;import android.app.TimePickerDialog;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.TextView;import android.widget.TimePicker;public class MainActivity extends Activity {    private TextView timePickerDisplay;    private Button buttonTimePicker;    private int mHour; // 設定小時    private int mMinute; // 設定分鐘    static final int TIME_DIALOG_ID = 0; // 對話方塊的ID    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        timePickerDisplay = (TextView) findViewById(R.id.timepicker_display);        buttonTimePicker = (Button) findViewById(R.id.button_timepicker);        buttonTimePicker.setOnClickListener(listener);        // 通過Calendar擷取模擬器的目前時間        final Calendar c = Calendar.getInstance();        mHour = c.get(Calendar.HOUR_OF_DAY);        mMinute = c.get(Calendar.MINUTE);        // 顯示當前模擬器的時間        timePickerDisplay.setText(new StringBuilder().append(pad(mHour))                .append(":").append(pad(mMinute)));    }    private OnClickListener listener = new OnClickListener() {        public void onClick(View v) {            DialogFragment fragment = new MyDialogFragment();            fragment.show(getFragmentManager(), "datePicker");        }    };    // 設定顯示格式    private static String pad(int c) {        return (c >= 10) ? String.valueOf(c) : "0" + String.valueOf(c);    }    // 使用內部類來實現    class MyDialogFragment extends DialogFragment {        public Dialog onCreateDialog(int id) {            switch (id) {            case TIME_DIALOG_ID:                return new TimePickerDialog(getActivity(), mTimeSetListener,                        mHour, mMinute, true);            }            return null;        }        @Override        public Dialog onCreateDialog(Bundle savedInstanceState) {            return new TimePickerDialog(getActivity(), mTimeSetListener, mHour,                    mMinute, true);        }        private TimePickerDialog.OnTimeSetListener mTimeSetListener = new TimePickerDialog.OnTimeSetListener() {            public void onTimeSet(TimePicker view, int hourOfDay, int minute) {                timePickerDisplay                        .setText(new StringBuilder().append(pad(hourOfDay))                                .append(":").append(pad(minute)));            }        };    }}

 

第一種方式為：

MainActivity.java:

 

package com.process.processbar;import java.util.Calendar;import android.app.Activity;import android.app.Dialog;import android.app.TimePickerDialog;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.TextView;import android.widget.TimePicker;public class MainActivity extends Activity {    private TextView timePickerDisplay;    private Button buttonTimePicker;    private int mHour; // 設定小時    private int mMinute; // 設定分鐘    static final int TIME_DIALOG_ID = 0; // 對話方塊的ID    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        timePickerDisplay = (TextView) findViewById(R.id.timepicker_display);        buttonTimePicker = (Button) findViewById(R.id.button_timepicker);        buttonTimePicker.setOnClickListener(listener);        // 通過Calendar擷取模擬器的目前時間        final Calendar c = Calendar.getInstance();        mHour = c.get(Calendar.HOUR_OF_DAY);        mMinute = c.get(Calendar.MINUTE);        // 顯示當前模擬器的時間        timePickerDisplay.setText(new StringBuilder().append(pad(mHour))                .append(":").append(pad(mMinute)));    }    private OnClickListener listener = new OnClickListener() {        public void onClick(View v) {            showDialog(TIME_DIALOG_ID); // 方法已到期        }    };    // 設定顯示時間    private static String pad(int c) {        return (c >= 10) ? String.valueOf(c) : "0" + String.valueOf(c);    }    // 監聽器    private TimePickerDialog.OnTimeSetListener mTimeSetListener = new TimePickerDialog.OnTimeSetListener() {        public void onTimeSet(TimePicker view, int hourOfDay, int minute) {            timePickerDisplay.setText(new StringBuilder()                    .append(pad(hourOfDay)).append(":").append(pad(minute)));        }    };    // 調用showDialog時，會調用onCreateDialog方法，我們需要重寫這個方法，在該方法中建立一個Dialog;    @Override    protected Dialog onCreateDialog(int id) {        switch (id) {        case TIME_DIALOG_ID:            return new TimePickerDialog(this, mTimeSetListener, mHour, mMinute,                    true);        }        return null;    }}

 

需注意：showDialog方法已到期，雖然還可以用，但官方建議使用第二種方式來替代showDialog；

 

android 通過TimePickerDialog修改時間