java - DatePicker 隐形按钮

Question

如您所知，我正在使用日期选择器(不同的语言。顶部写着 2015 年 11 月)。

我正在使用 OnClickListener，当单击 a1 EditText 时，会弹出 DatePicker 对话框，您将能够选择日期，完成后您会在 EditText 中收到日期。

但是我在对话框的确认按钮和年份选择方面遇到了麻烦，它们是不可见的，我只能单击它们，但看不到它们。

如何启用/可见构造和年份日期选择按钮？

Activity .xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_first_entry"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.none.myapplication.firstEntry">
<EditText
        android:id="@+id/a1"
        android:layout_below="@+id/btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
</RelativeLayout>

Activity .java

private EditText a1;
private DatePickerDialog fromDatePickerDialog;
private SimpleDateFormat dateFormatter;

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


    dateFormatter = new SimpleDateFormat("dd-MM-yyyy");

    findViewsById();

    setDateTimeField();

}
private void findViewsById() {
    a1 = (EditText) findViewById(R.id.a1);
    a1.setInputType(InputType.TYPE_NULL);
    a1.requestFocus();
}

private void setDateTimeField() {
    a1.setOnClickListener(this);

    Calendar newCalendar = Calendar.getInstance();
    fromDatePickerDialog = new DatePickerDialog(this, new DatePickerDialog.OnDateSetListener() {

        public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
            Calendar newDate = Calendar.getInstance();
            newDate.set(year, monthOfYear, dayOfMonth);
            a1.setText(dateFormatter.format(newDate.getTime()));
        }

    },newCalendar.get(Calendar.YEAR), newCalendar.get(Calendar.MONTH), newCalendar.get(Calendar.DAY_OF_MONTH));
}


@Override
public void onClick(View view) {
    if(view == a1) {
        fromDatePickerDialog.show();
    }
}

Answer 1

fromDatePickerDialog = new DatePickerDialog(this, R.style.DialogTheme, new DatePickerDialog.OnDateSetListener() {
    //rest of the code
}

在你的 styles.xml 中

<style name="DialogTheme" parent="Theme.AppCompat.Light.Dialog">
<item name="colorAccent">@color/blue_500</item>
</style>

original answer