使用 Kotlin 设置 AutocompleteSupportFragment 的样式

Styling AutocompleteSupportFragment using Kotlin

我正在尝试更改我的 AutocompleteSupportFragment 字段的样式

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:id="@+id/llSearchHolder"
    android:padding="7dp">
    <fragment android:id="@+id/autocomplete_fragment"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:name="com.google.android.libraries.places.widget.AutocompleteSupportFragment"
        android:hint="@string/Iam_going_to"
    />
</LinearLayout>

我尝试实施 但我总是会收到 Caused by: java.lang.ClassCastException: android.widget.LinearLayout cannot be cast to android.widget.EditText 错误。我正在使用 Kotlin,所以我的代码如下所示:

val autocompleteFragment = supportFragmentManager.findFragmentById(R.id.autocomplete_fragment) as AutocompleteSupportFragment?
autocompleteFragment!!.setPlaceFields(Arrays.asList(Place.Field.ID, Place.Field.NAME));
((autocompleteFragment.getView()!!.findViewById(R.id.autocomplete_fragment)) as EditText).textSize = 30.0f

您需要使用以下代码

((autocompleteFragment.getView()!!.findViewById(R.id.places_autocomplete_search_input)) as EditText).textSize = 30.0f

或更多 Kotlin 方式,

autocompleteFragment.view?.findViewById<EditText>(R.id.places_autocomplete_search_input)?.textSize = 30.0f

EditText 的正确 ID 是 places_autocomplete_search_input 而不是 autocomplete_fragment


Analysis of the problem

您正在 xml

中使用片段 com.google.android.libraries.places.widget.AutocompleteSupportFragment

在查看 AutocompleteSupportFragment 片段的代码时,您可以看到它使用了布局 places_autocomplete_fragment.xml。下面的代码

public class AutocompleteSupportFragment extends Fragment {
    ....

    public AutocompleteSupportFragment() {
        super(layout.places_autocomplete_fragment);
        ....
    }
}

现在,如果你查看 places_autocomplete_fragment.xml,你可以看到 EditText 的 id 是 places_autocomplete_search_input,代码如下

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:focusable="true"
    android:focusableInTouchMode="true"
    android:gravity="center"
    android:layoutDirection="locale"
    android:orientation="vertical"
    android:textDirection="locale">

  <ImageButton
      android:id="@+id/places_autocomplete_search_button"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_weight="0"
      android:background="@null"
      android:contentDescription="@string/places_autocomplete_search_hint"
      android:padding="@dimen/places_autocomplete_button_padding"
      android:src="@drawable/quantum_ic_search_grey600_24" />

  <EditText
      android:id="@+id/places_autocomplete_search_input"
      android:layout_width="0dp"
      android:layout_height="match_parent"
      android:layout_weight="1"
      android:background="@null"
      android:focusable="false"
      android:focusableInTouchMode="false"
      android:hint="@string/places_autocomplete_search_hint"
      android:inputType="textNoSuggestions"
      android:lines="1"
      android:maxLines="1"
      android:paddingLeft="@dimen/places_autocomplete_search_input_padding"
      android:paddingRight="@dimen/places_autocomplete_search_input_padding"
      android:singleLine="true"
      android:textColor="@color/places_autocomplete_search_text"
      android:textColorHint="@color/places_autocomplete_search_hint"
      android:textSize="@dimen/places_autocomplete_search_input_text" />

  <ImageButton
      android:id="@+id/places_autocomplete_clear_button"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_weight="0"
      android:background="@null"
      android:contentDescription="@string/places_autocomplete_clear_button"
      android:padding="@dimen/places_autocomplete_button_padding"
      android:src="@drawable/quantum_ic_clear_grey600_24" />

</LinearLayout>

Android 可能会在您的 xml 文件中建议 Replace the <fragment> tag with FragmentContainerView.。这会破坏自定义样式,因此请继续使用 <fragment>:

使用这个:

<fragment
    android:id="@+id/hostAutocompleteFrag"
    android:name="com.google.android.libraries.places.widget.AutocompleteSupportFragment"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" />

不要使用这个:

<androidx.fragment.app.FragmentContainerView
    android:id="@+id/hostAutocompleteFrag"
    android:name="com.google.android.libraries.places.widget.AutocompleteSupportFragment"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" />

这是我的 AutocompleteSupportFragment 初始化方法,供您参考:

private fun initAutoComplete() {
    val mapAutocomplete = childFragmentManager.findFragmentById(R.id.hostAutocompleteFrag)
    autoCompFrag = mapAutocomplete as AutocompleteSupportFragment
    val hintTxt = autoCompFrag?.findViewById<EditText>(R.id.places_autocomplete_search_input)
    hintTxt?.textSize = 15f
    hintTxt?.setTextColor(requireContext().getColor(R.color.greyColor))
    autoCompFrag.setHint(getString(R.string.search_hint))
    autoCompFrag.setPlaceFields(listOf(Place.Field.NAME, Place.Field.LAT_LNG, Place.Field.ADDRESS))
    
    autoCompFrag.setOnPlaceSelectedListener(object : PlaceSelectionListener {
        override fun onPlaceSelected(place: Place) {
            val latLng = place.latLng ?: return
            setMapLocation(latLng.latitude, latLng.longitude)
        }

        override fun onError(status: Status) {
            Log.e("$TAG initAutoComplete --- ", "An error occurred: $status")
        }
    })
}

用于在 kotlin 中更改 EditText 颜色

val autocompleteFragment = supportFragmentManager.findFragmentById(R.id.autocompleteFragment) as AutocompleteSupportFragment?
autocompleteFragment.view?.findViewById<EditText>(places_autocomplete_search_input)?.setTextColor(ContextCompat.getColor(context, R.color.colorWhite));

如果仍然无法更改,请尝试将值中的颜色设置为

<color name="places_autocomplete_search_text">#707070</color>

钥匙很重要places_autocomplete_search_text