AlertDialog底部focus后背景色

由于LCM显示效果问题，在launcher界面卸载应用的UninstallerActivity的Dialog界面，底部button选中效果不易识别；

解决方案：在framwork中Dilaog布局文件alert_dialog_button_bar_material.xml的button条件背景button_selector,在normal，selected以及focused状态下切换背景色

修改方法：frameworks/base/core/res/res/layout/alert_dialog_button_bar_material.xml

 <ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
            android:id="@+id/buttonPanel"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:scrollbarAlwaysDrawVerticalTrack="true"
            android:scrollIndicators="top|bottom"
            android:fillViewport="true"
            style="?attr/buttonBarStyle">
    <com.android.internal.widget.ButtonBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layoutDirection="locale"
        android:orientation="horizontal"
        android:paddingStart="12dp"
        android:paddingEnd="12dp"
        android:paddingTop="4dp"
        android:paddingBottom="4dp"
        android:gravity="bottom">

        <Button
            android:id="@+id/button3"
            style="?attr/buttonBarNeutralButtonStyle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />

        <Space
            android:id="@+id/spacer"
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:layout_weight="1"
            android:visibility="invisible" />

        <Button
            android:id="@+id/button2"
            style="?attr/buttonBarNegativeButtonStyle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@drawable/button_selector"/>

        <Button
            android:id="@+id/button1"
            style="?attr/buttonBarPositiveButtonStyle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@drawable/button_selector"/>
    </com.android.internal.widget.ButtonBarLayout>
</ScrollView>

frameworks/base/core/res/res/drawable目录下添加button_selector.xml文件

 

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright (C) 2008 The Android Open Source Project

     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.
     You may obtain a copy of the License at
 
          http://www.apache.org/licenses/LICENSE-2.0
 
     Unless required by applicable law or agreed to in writing, software
     distributed under the License is distributed on an "AS IS" BASIS,
     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     See the License for the specific language governing permissions and
     limitations under the License.
-->

<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item
        android:state_pressed="true"
        android:state_enabled="true"
        android:drawable="@color/Pink_700" />

    <item
        android:state_selected="true"
        android:state_enabled="false"
        android:drawable="@color/transparent" />

    <item
        android:state_selected="true"
        android:state_enabled="true"
        android:drawable="@color/Pink_700" />

    <item
        android:state_focused="true"
        android:state_enabled="false"
        android:drawable="@color/transparent" />

    <item
        android:state_focused="true"
        android:state_enabled="true"
        android:drawable="@color/Pink_700" />

</selector>

 

 

 

本文地址：https://blog.csdn.net/luguo0822/article/details/108576263