在RecyclerVIew

时间:2017-10-04 05:37:10

标签: android android-layout android-recyclerview

如何在recyclerview内的所选项目后面显示自定义形状作为背景。我尝试了几件事,但都失败了:

activity_main.xml中:

<LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">

            <android.support.v7.widget.RecyclerView
                android:id="@+id/nav_drawer_recycler_view"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:background="@drawable/drawer_background"
                android:theme="@style/drawer"></android.support.v7.widget.RecyclerView>

        </LinearLayout>

drawer_background.xml:

 <?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@drawable/drawable_shape_selected" android:state_checked="true"></item>
    <item android:drawable="@android:color/transparent"></item>
</selector>

drawable_shape_selected.xml:

 <?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <solid android:color="#FFB74D"></solid>

</shape>

custom_layout.xml:对于RecyclerView

<?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:layout_margin="5dp"
    android:orientation="vertical">

    <TextView
        android:id="@+id/TextViewDisplay"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello" />

</LinearLayout>

更新

itemView.setOnFocusChangeListener(new View.OnFocusChangeListener() {
            @Override
            public void onFocusChange(View view, boolean b) {
                Toast.makeText(context, "Position " + getAdapterPosition(), Toast.LENGTH_SHORT).show();
            }
        });

1 个答案:

答案 0 :(得分:0)

像这样更改drawer_background.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@drawable/drawable_shape_selected"
          android:state_pressed="true" />
    <item android:drawable="@drawable/drawable_shape_selected"
          android:state_focused="true" />
    <item android:drawable="@android:color/transparent" />
</selector>

同时将android:focusableInTouchMode="true"添加到custom_layout.xml

的线性布局中

这是因为默认情况下,当触摸视图时,它将需要点击而不是焦点。如果您希望视图聚焦并在按下时更改其背景,请将其添加到您的视图中,即xml中的LinearLayout。

EDITfocusableInTouchMode第一次禁用click时使视图触摸模式。首次使按钮单击发生时,在按钮和onFocuschange的java类中添加焦点侦听器添加{{ 1}}点击按钮。

view.performClick()