在android中的当前日期的日期选择器

Question

我正在使用日期选择器，但我有日期和时间选择器的一些问题。我需要日期选择器对话框应该显示当前日期值。同样，时间选择器应该显示当前时间值。如何做到这一点，请任何身体帮助。

Thnks。

Answer 1

对于DatePicker，请从Android网站查看此example。

private TextView mDateDisplay; 
private Button mPickDate; 
private int mYear; 
private int mMonth; 
private int mDay; 
static final int DATE_DIALOG_ID = 0; 

protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 

    // capture our View elements 
    mDateDisplay = (TextView) findViewById(R.id.dateDisplay); 
    mPickDate = (Button) findViewById(R.id.pickDate); 

    // add a click listener to the button 
    mPickDate.setOnClickListener(new View.OnClickListener() { 
     public void onClick(View v) { 
      showDialog(DATE_DIALOG_ID); 
     } 
    }); 

    // get the current date 
    final Calendar c = Calendar.getInstance(); 
    mYear = c.get(Calendar.YEAR); 
    mMonth = c.get(Calendar.MONTH); 
    mDay = c.get(Calendar.DAY_OF_MONTH); 

    // display the current date (this method is below) 
    updateDisplay(); 
} 

// updates the date in the TextView 
private void updateDisplay() { 
    mDateDisplay.setText(
     new StringBuilder() 
       // Month is 0 based so add 1 
       .append(mMonth + 1).append("-") 
       .append(mDay).append("-") 
       .append(mYear).append(" ")); 
} 

对于TimePicker，请参阅此example。

private TextView mTimeDisplay; 
private Button mPickTime; 
private int mHour; 
private int mMinute; 
static final int TIME_DIALOG_ID = 0; 

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

    // capture our View elements 
    mTimeDisplay = (TextView) findViewById(R.id.timeDisplay); 
    mPickTime = (Button) findViewById(R.id.pickTime); 

    // add a click listener to the button 
    mPickTime.setOnClickListener(new View.OnClickListener() { 
     public void onClick(View v) { 
      showDialog(TIME_DIALOG_ID); 
     } 
    }); 

    // get the current time 
    final Calendar c = Calendar.getInstance(); 
    mHour = c.get(Calendar.HOUR_OF_DAY); 
    mMinute = c.get(Calendar.MINUTE); 

    // display the current date 
    updateDisplay(); 
} 

// updates the time we display in the TextView 
private void updateDisplay() { 
    mTimeDisplay.setText(
     new StringBuilder() 
      .append(pad(mHour)).append(":") 
      .append(pad(mMinute))); 
} 

private static String pad(int c) { 
    if (c >= 10) 
     return String.valueOf(c); 
    else 
     return "0" + String.valueOf(c); 
} 

这两个示例都显示如何获取当前日期和时间。