仿照利用android系统源码资源文件，修改SeekBar颜色前景与背景

最新推荐文章于 2024-08-10 04:17:00 发布

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博客介绍了SeekBar控件的使用。先拖入SeekBar控件，其ProgressDrawable默认值有特定源码。直接使用该源码会提示部分内容非public，可用特定颜色替换。还展示了修改后的progressDrawable设置及对应xml文件。

先看结果：

1.拖一个SeekBar控件， ProgressDrawable默认值@android:drawable/scrubber_progress_horizontal_holo_light

2.在anroid SDK里搜索scrubber_progress_horizontal_holo_light.xml，打开源码为

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright (C) 2010 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.
-->

<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:id="@android:id/background"
            android:drawable="@android:drawable/scrubber_track_holo_light" />
    <item android:id="@android:id/secondaryProgress">
        <scale android:scaleWidth="100%"
               android:drawable="@android:drawable/scrubber_secondary_holo" />
    </item>
    <item android:id="@android:id/progress">
        <scale android:scaleWidth="100%"
               android:drawable="@android:drawable/scrubber_primary_holo" />
    </item>
</layer-list>

3.直接使用会提示其中的 android:drawable="@android:drawable/scrubber_track_holo_light"不是public,可以

用android:drawable="@android:color/black"替换就行。

以下是我改的：

android:progressDrawable="@drawable/progressbar_blue"

progressbar_blue.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:id="@android:id/background"
            android:drawable="@color/grey" />
    <item android:id="@android:id/progress">
        <scale android:scaleWidth="100%"
          android:drawable="@color/blue" />
    </item>
</layer-list>