java - 文本框聚焦时显示日期选择器

Question

我刚刚进入 Android 应用程序，现在尝试使用一个允许用户在文本框中输入日期的界面。日期对话框仅应在文本框获得焦点时显示。从对话框中选择日期后，它将显示在文本框中。现在的问题是，即使文本框没有聚焦，也会显示日期对话框。有人可以帮我解决我的问题吗？谢谢。

TimeSheet.xml

<?xml version="1.0" encoding="utf-8"?>
<AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:weightSum="1">


    <EditText
        android:layout_width="190dp"
        android:layout_height="wrap_content"
        android:id="@+id/txtdate"
        android:layout_x="131dp"
        android:layout_y="192dp"
        android:hint="Touch here to select a date"/>

</AbsoluteLayout>

TimeSheet.java

package com.example.project.project;
import android.app.DatePickerDialog;
import android.support.v4.app.DialogFragment;
import android.support.v7.app.AppCompatActivity;
import android.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.ArrayAdapter;
import android.view.View;
import android.os.Bundle;
import android.widget.Button;
import java.util.List;
import java.util.ArrayList;
import android.content.Context;
import android.content.ContentValues;
import android.widget.Toast;

import com.example.project.project.API.TimeSheetAPI;
import com.example.project.project.database.MyDatabaseHelper;



public class TimeSheet extends AppCompatActivity {

    private Spinner spinner,spinner2;
    private Button btnSaved;
    private MyDatabaseHelper dbHelper;
    private TimeSheetAPI ts;






    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.timesheet);
        ts=new TimeSheetAPI(this);  
    }


    public void onStart()
    {
        super.onStart();
        EditText txtDate=(EditText)findViewById(R.id.txtdate);
        txtDate.setOnFocusChangeListener(new View.OnFocusChangeListener() {
            public void onFocusChange(View v, boolean hasFocus)
            {
                if(hasFocus)
                {
                    DateDialog dialog=new DateDialog(v);
                    FragmentTransaction ft=getFragmentManager().beginTransaction();
                    dialog.show(ft,"DatePicker");
                }
            }

    });
    }

DateDialog.java

package com.example.project.project;

import android.annotation.SuppressLint;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.DatePicker;
import android.widget.EditText;
import java.util.Calendar;

/**
 * Created by tongws on 9/14/2015.
 */

@SuppressLint("ValidFragment")
public class DateDialog extends DialogFragment implements DatePickerDialog.OnDateSetListener {
    EditText txtdate;


   public DateDialog(View view)
    {
        txtdate=(EditText)view;
    }


    public Dialog onCreateDialog(Bundle savedInstanceState)
    {
        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);
        return new DatePickerDialog(getActivity(),this,year,month,day);
    }

    public void onDateSet(DatePicker view,int year, int month, int day)
    {
         String date=day+"-"+(month+1)+"-"+year;
        txtdate.setText(date);
    }
}

Answer 1

Activity 开始后，您的 EditText 已获得焦点。要清除 EditText 上的默认焦点，请将焦点添加到父布局。这可以通过将这行代码添加到您的父 View 中来完成。

android:focusableInTouchMode="true"

例如，

<AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:weightSum="1"
    android:focusableInTouchMode="true">

<EditText
    android:layout_width="190dp"
    android:layout_height="wrap_content"
    android:id="@+id/txtdate"
    android:layout_x="131dp"
    android:layout_y="192dp"
    android:hint="Touch here to select a date"/>

</AbsoluteLayout>