Android开发之时间日期操作实例

相信对于手机的时间日期设置大家一定都不陌生吧，今天举一个关于时间日期设置的示例，其中有些许不完善之处，例如如何使设置的时间日期和手机系统同步等。感兴趣的读者可以根据自身经验加以完善。

现来看看具体示例，希望对大家有所帮助。

首先是时间设置：

.java文件（MainActivity.java）代码如下：

package com.example.activity_time_date;
import java.util.Calendar;
import android.app.Activity;
import android.app.Dialog;
import android.app.TimePickerDialog;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
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 mytext = null;
 private Button mybutton1 = null;
 private Button mybutton2 = null;
 private int mHour;
 private int mMinute;
 static final int TIME_DIALOG_ID = 0;
 private TimePickerDialog.OnTimeSetListener mTimeSetListener = new TimePickerDialog.OnTimeSetListener() {
  @Override
  public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
   // TODO Auto-generated method stub
   mHour = hourOfDay;
   mMinute = minute;
   updateDisplay();
  }
 };
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  mytext = (TextView)findViewById(R.id.textview);
  mybutton1 = (Button)findViewById(R.id.button1);
  mybutton2 = (Button)findViewById(R.id.button2); 
  mybutton1.setOnClickListener(new OnClickListener() {
   @Override
   public void onClick(View v) {
    // TODO Auto-generated method stub
    showDialog(TIME_DIALOG_ID);
   }
  });
  mybutton2.setOnClickListener(new OnClickListener() {
   @Override
   public void onClick(View v) {
    // TODO Auto-generated method stub
    MainActivity.this.startActivity(new Intent(MainActivity.this, dateActivity.class));
   }
  });
  final Calendar cal = Calendar.getInstance();
  mHour = cal.get(Calendar.HOUR_OF_DAY);
  mMinute = cal.get(Calendar.MINUTE);
  updateDisplay();
 }
 private void updateDisplay(){
  mytext.setText(new StringBuilder().append(pad(mHour)).append(":")
    .append(pad(mMinute)));
 }
 private static String pad(int i){
  if (i >= 10)
   return String.valueOf(i);
  else
   return "0" + String.valueOf(i);
 }
 @Override
 protected Dialog onCreateDialog(int id) {
  switch (id) {
  case TIME_DIALOG_ID:
   return new TimePickerDialog(this, mTimeSetListener, mHour, mMinute,
     false);
  }
  return null;
 }
}

布局文件(activity_main.xml)代码如下：

<RelativeLayout 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"
 tools:context="${relativePackage}.${activityClass}" >
<LinearLayout 
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:orientation="vertical"
 >
 <TextView
  android:id="@+id/textview"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  />
 <Button 
  android:id="@+id/button1"
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:text="设置时间"
  />
 <Button 
  android:id="@+id/button2"
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:text="下一页"
  />
</LinearLayout>
</RelativeLayout>
　　

运行效果如下图所示：

日期设置和时间设置基本一致，在此不再赘述。读者可以调试并改进本文示例代码，相信会有新的收获！