如何从android中的日期选择器中获取日期？

问题描述：

我使用的DatePicker我的应用程序。我想，我已经选择（在DatePicker）的日期，但它没有返回选定的日期。它总是返回当前日期。我如何才能从DatePicker获得所选日期？如何从android中的日期选择器中获取日期？

任何帮助将不胜感激。

day = pickDate.getDayOfMonth(); 
    month = pickDate.getMonth() + 1; 
    year = pickDate.getYear(); 
    readAndChoose = (Button) findViewById(R.id.btnReadAndChoose); 
    readAndChoose.setOnClickListener(new OnClickListener() { 

     @Override 
     public void onClick(View arg0) { 

      Context context = getApplicationContext(); 
      CharSequence text = "" + day + "-" + "" + month + "-" + "" 
        + year; 
      int duration = Toast.LENGTH_SHORT; 
      Toast toast = Toast.makeText(context, text, duration); 
      toast.show(); 

      /* 
      * Intent i = new Intent(BirthActivity.this, 
      * CompassActivity.class); startActivity(i); 
      */ 

     } 

    });

我不想创建一个DatePicker对话，但我想透过Android提供的DatePicker。

更新与您正在使用的代码的OP。 – 2013-03-08 09:53:47

您需要为日期选择器设置侦听器并获取事件触发的日期，onDateSetlistener – Pragnani 2013-03-08 10:01:18

如何设置日期选择器的侦听器。 – user2147892 2013-03-08 10:26:47

答

我觉得这是你需要

// the call back received when the user "sets" the date in the dialog 
private DatePickerDialog.OnDateSetListener mDateSetListener = 
    new DatePickerDialog.OnDateSetListener() { 
     public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) { 
      mYear = year; 
      mMonth = monthOfYear; 
      mDay = dayOfMonth; 

     } 
};

答

public class pickerdate extends Activity { 
/** Called when the activity is first created. */ 
private TextView mDateDisplay; 
private Button mPickDate; 
private int mYear; 
private int mMonth; 
private int mDay; 

static final int DATE_DIALOG_ID = 0; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 


    mDateDisplay = (TextView) findViewById(R.id.dateDisplay); 
    mPickDate = (Button) findViewById(R.id.pickDate); 


    mPickDate.setOnClickListener(new View.OnClickListener() { 
     public void onClick(View v) { 
      showDialog(DATE_DIALOG_ID); 
     } 
    }); 


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

    updateDisplay(); 
} 
private void updateDisplay() { 
    mDateDisplay.setText(
     new StringBuilder() 
       // Month is 0 based so add 1 
       .append(mMonth + 1).append("-") 
       .append(mDay).append("-") 
       .append(mYear).append(" ")); 
} 
private DatePickerDialog.OnDateSetListener mDateSetListener = 
    new DatePickerDialog.OnDateSetListener() { 

     public void onDateSet(DatePicker view, int year, 
           int monthOfYear, int dayOfMonth) { 
      mYear = year; 
      mMonth = monthOfYear; 
      mDay = dayOfMonth; 
      updateDisplay(); 
     } 
    }; 
    @Override 
    protected Dialog onCreateDialog(int id) { 
     switch (id) { 
     case DATE_DIALOG_ID: 
      return new DatePickerDialog(this, 
         mDateSetListener, 
         mYear, mMonth, mDay); 
     } 
     return null; 
    } 
}

主要布局文件

<?xml version="1.0" encoding="utf-8"?> 
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:orientation="vertical"> 
<TextView android:id="@+id/dateDisplay" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text=""/> 
<Button android:id="@+id/pickDate" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="Date Picker"/> 
    </LinearLayout>

上面的代码工作是什么。我希望这正是你的期望。

我不想使用单独的对话框。但我想用android提供的日期选择器。 – user2147892 2013-03-08 10:43:54

注意：**不再使用。你应该考虑使用'DatePickerFragment'而不仅仅是对话框** – Raghunandan 2014-04-23 10:00:46

答

private DatePickerDialog.OnDateSetListener datePickerListener 
       = new DatePickerDialog.OnDateSetListener() { 

     // when dialog box is closed, below method will be called. 
     public void onDateSet(DatePicker view, int selectedYear, 
       int selectedMonth, int selectedDay) { 
      year = selectedYear; 
      month = selectedMonth; 
      day = selectedDay; 

      // set selected date into textview 
      tvDisplayDate.setText(new StringBuilder().append(month + 1) 
       .append("-").append(day).append("-").append(year) 
       .append(" ")); 

      // set selected date into datepicker also 
      dpResult.init(year, month, day, null); 

     } 
    };

参考Thsi link..May是这将有助于you.:- http://www.mkyong.com/android/android-date-picker-example/

答

DJ的答案会工作。如果你想使用日历变量来存储日期然后，

 public void onDateSet(DatePicker view, int year, int monthOfYear, 
      int dayOfMonth) { 
     setDate.set(year, monthOfYear, dayOfMonth);

希望这有助于！

答

也有一个伟大的教程here其中也有源代码下载。

有一点要注意，编译源代码时，你需要做SelectDateFragment类“静态”的javapapers代码，以及使populateSetDate（）方法静态的，而且我也感动这段代码：

mEdit = (EditText)findViewById(R.id.editText1);

到onCreate（）方法。之后，你可以编译代码。

MainActivity应该是这样到底编辑后：

package com.javapapers.andoiddatepicker; 
import java.util.Calendar; 
import android.app.DatePickerDialog; 
import android.app.Dialog; 
import android.os.Bundle; 
import android.support.v4.app.DialogFragment; 
import android.support.v4.app.FragmentActivity; 
import android.view.View; 
import android.widget.DatePicker; 
import android.widget.EditText; 

public class MainActivity extends FragmentActivity { 

private static EditText mEdit; 

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

    mEdit = (EditText) findViewById(R.id.editText1); 
} 

public void selectDate(View view) { 
    DialogFragment newFragment = new SelectDateFragment(); 
    newFragment.show(getSupportFragmentManager(), "DatePicker"); 
} 

public static void populateSetDate(int year, int month, int day) { 
    mEdit.setText(month + "/" + day + "/" + year); 
} 

public static class SelectDateFragment extends DialogFragment implements 
     DatePickerDialog.OnDateSetListener { 

    @Override 
    public Dialog onCreateDialog(Bundle savedInstanceState) { 
     // Use the current date as the default date in the picker 
     final Calendar c = Calendar.getInstance(); 
     int year = c.get(Calendar.YEAR); 
     int month = c.get(Calendar.MONTH); 
     int day = c.get(Calendar.DAY_OF_MONTH); 

     // Create a new instance of DatePickerDialog and return it 
     return new DatePickerDialog(getActivity(), this, year, month, day); 
    } 

    public void onDateSet(DatePicker view, int year, int month, int day) { 
     populateSetDate(year, month+1, day); 
    } 
}

}

答

有2种方法可以这样做：使用DatePicker传球init()方法

在OnDateChangedListener。

datePicker.init(
     datePicker.getYear(), datePicker.getMonth(), datePicker.getDayOfMonth(), 
     new DatePicker.OnDateChangedListener() { 
      @Override 
      public void onDateChanged(DatePicker datePicker, int year, int monthOfYear, int dayOfMonth) { 
       selectedYear = year; 
       selectedMonth = monthOfYear; 
       selectedDayOfMonth = dayOfMonth; 
       Log.d(LOG_TAG, "selectedDate = " + selectedYear + "-" + selectedMonth + "-" + selectedDayOfMonth); 
       //TODO save or use selected value here 
      }//end onDateChangedListener 

});

有一个按钮点击或压倒一切的获取当前的选择日期时，某个动作是要采取或当用户离开屏幕。

@Override 
public void onPause() { 
    int selectedYear = datePicker.getYear(); 
    int selectedMonth = datePicker.getMonth(); 
    int selectedDay = datePicker.getDayOfMonth(); 
    //TODO save or use selected value here 
}

如何从android中的日期选择器中获取日期？

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