Android簡單自定義圓形和水平ProgressBar
http://blog.csdn.net/mad1989/article/details/38042875
ProgressBar簡介
繼承於View類,直接子類有AbsSeekBar和ContentLoadingProgressBar,其中AbsSeekBar的子類有SeekBar和RatingBar,可見這二者也是基於ProgressBar實現的。
1、ProgressBar有兩個進度,一個是android:progress,另一個是android:secondaryProgress。後者主要是為快取需要所涉及的,比如在看網路視訊時候都會有一個快取的進度條以及還要一個播放的進度,在這裡快取的進度就可以是android:secondaryProgress,而播放進度就是android:progress,有了secondProgress,可以很方便定製ProgressBar。
2、ProgressBar分為確定的和不確定的,確定的是我們能明確看到進度,相反不確定的就是不清楚、不確定一個操作需要多長時間來完成,這個時候就需要用的不確定的ProgressBar了。屬性android:indeterminate如果設定為true的話,那麼ProgressBar就可能是圓形的滾動條或者水平的滾動條(由樣式決定),但是我們一般時候,是直接使用Style型別來區分圓形還是水平ProgressBar的。
3、ProgressBar的樣式設定其實有兩種方式,在API文件中說明的方式如下:
- Widget.ProgressBar.Horizontal
- Widget.ProgressBar.Small
- Widget.ProgressBar.Large
- Widget.ProgressBar.Inverse
- Widget.ProgressBar.Small.Inverse
- Widget.ProgressBar.Large.Inverse
- style="?android:attr/progressBarStyle"
- style="?android:attr/progressBarStyleHorizontal"
- style="?android:attr/progressBarStyleInverse"
- style="?android:attr/progressBarStyleLarge"
- style="?android:attr/progressBarStyleLargeInverse"
- style="?android:attr/progressBarStyleSmall"
- style="?android:attr/progressBarStyleSmallInverse"
- style="?android:attr/progressBarStyleSmallTitle"
- <ProgressBar
- android:id="@+id/progressBar1"
- style="?android:attr/progressBarStyleHorizontal"
- style="@android:style/Widget.ProgressBar.Horizontal"(等同於@android:attr)
- android:layout_width="match_parent"
- android:layout_height="wrap_content" />
水平ProgressBar系統樣式
我們去看一下style="?android:attr/progressBarStyleHorizontal"的原始碼,如下:
- <prename="code"class="java"><stylename="Widget.ProgressBar.Horizontal">
- <itemname="android:indeterminateOnly">false</item>
- <itemname="android:progressDrawable">@android:drawable/progress_horizontal</item>
- <itemname="android:indeterminateDrawable">@android:drawable/progress_indeterminate_horizontal</item>
- <itemname="android:minHeight">20dip</item>
- <itemname="android:maxHeight">20dip</item>
- <itemname="android:mirrorForRtl">true</item>
- </style>
- <?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.
- -->
- <layer-list xmlns:android="http://schemas.android.com/apk/res/android">
- <item android:id="@android:id/background">
- <shape>
- <corners android:radius="5dip" />
- <gradient
- android:startColor="#ff9d9e9d"
- android:centerColor="#ff5a5d5a"
- android:centerY="0.75"
- android:endColor="#ff747674"
- android:angle="270"
- />
- </shape>
- </item>
- <item android:id="@android:id/secondaryProgress">
- <clip>
- <shape>
- <corners android:radius="5dip" />
- <gradient
- android:startColor="#80ffd300"
- android:centerColor="#80ffb600"
- android:centerY="0.75"
- android:endColor="#a0ffcb00"
- android:angle="270"
- />
- </shape>
- </clip>
- </item>
- <item android:id="@android:id/progress">
- <clip>
- <shape>
- <corners android:radius="5dip" />
- <gradient
- android:startColor="#ffffd300"
- android:centerColor="#ffffb600"
- android:centerY="0.75"
- android:endColor="#ffffcb00"
- android:angle="270"
- />
- </shape>
- </clip>
- </item>
- </layer-list>
自定義水平ProgressBar
第一步,在drawable資料夾下新建一個progressbar_horizontal_1.xml:
- <?xml version="1.0" encoding="utf-8"?>
- <layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
- <!-- background -->
- <item
- android:id="@android:id/background"
- android:drawable="@drawable/progress_patch_green">
- </item>
- <!-- progress -->
- <item android:id="@android:id/progress">
- <clip>
- <nine-patch android:src="@drawable/progress_patch_galy" />
- </clip>
- </item>
- <!-- second progress -->
- <item android:id="@android:id/secondaryProgress">
- <clip>
- <nine-patch android:src="@drawable/progresspatch_blue" />
- </clip>
- </item>
- </layer-list>
第二步,標準一點,在style中新建我們自定義的style:mProgress_horizontal:
- <style name="mProgress_horizontal">
- <item name="android:indeterminateOnly">false</item>
- <item name="android:progressDrawable">@drawable/progressbar_horizontal_1</item><!-- progress_horizontal -->
- <item name="android:indeterminateDrawable">@android:drawable/progress_indeterminate_horizontal</item>
- <item name="android:minHeight">20dip</item>
- <item name="android:maxHeight">20dip</item>
- </style>
第三步,元件引用:
- <ProgressBar
- android:id="@+id/progressBar1"
- android:layout_width="match_parent"
- android:layout_height="wrap_content"
- android:background="@drawable/progress_backround"
- android:padding="5dp"
- android:progress="50"
- style="@style/mProgress_horizontal"
- android:secondaryProgress="20"
- android:visibility="visible" />
在這裡我們也可以省略第二步建立style,直接在元件中android:progressDrawable引用自己的progressbar_horizontal_1,如下:
- <ProgressBar
- android:id="@+id/progressBar1"
- android:indeterminate="false"
- android:indeterminateOnly="false"
- android:layout_width="match_parent"
- android:layout_height="wrap_content"
- android:background="@drawable/progress_backround"
- android:padding="5dp"
- android:progress="50"
- android:maxHeight="20dp"
- android:minHeight="20dp"
- android:progressDrawable="@drawable/progressbar_horizontal_1"
- android:secondaryProgress="20"
- />
第四步,效果圖:
圓形ProgressBar系統樣式
- <ProgressBar
- android:id="@+id/progressBar2"
- style="@android:attr/progressBarStyleLarge"
- android:layout_gravity="center_vertical"
- android:layout_width="match_parent"
- android:layout_height="wrap_content" />
- <style name="Widget.ProgressBar.Large">
- <item name="android:indeterminateDrawable">@android:drawable/progress_large_white</item>
- <item name="android:minWidth">76dip</item>
- <item name="android:maxWidth">76dip</item>
- <item name="android:minHeight">76dip</item>
- <item name="android:maxHeight">76dip</item>
- </style>
- <rotate xmlns:android="http://schemas.android.com/apk/res/android"
- android:drawable="@drawable/spinner_white_76"
- android:pivotX="50%"
- android:pivotY="50%"
- android:fromDegrees="0"
- android:toDegrees="360" />
自定義圓形ProgressBar
第一步,在drawable資料夾下新建:progressbar_circle_1.xml,如下:- <?xml version="1.0" encoding="utf-8"?>
- <rotate xmlns:android="http://schemas.android.com/apk/res/android"
- android:drawable="@drawable/loading"//自定義的菊花圖片
- android:fromDegrees="0"
- android:pivotX="50%"
- android:pivotY="50%"
- android:toDegrees="360" >
- </rotate>
- <style name="mProgress_circle">
- <item name="android:indeterminateDrawable">@drawable/progressbar_circle_1</item>
- <item name="android:minWidth">25dp</item>
- <item name="android:minHeight">25dp</item>
- <item name="android:maxWidth">60dp</item>
- <item name="android:maxHeight">60dp</item>
- </style>
第三步,元件中引用,如下:
- <ProgressBar
- android:id="@+id/progressBar2"
- style="@style/mProgress_circle"
- android:layout_gravity="center_vertical"
- android:layout_width="match_parent"
- android:indeterminateDuration="1200"
- android:layout_height="wrap_content" />
上面是通過一張圖片填充android:indeterminateDrawable,我們也可以定義一個動畫或者自定義顏色(shape)來實現,跟圖片的用法一樣:
定義動畫 progress_circle_loading,xml:
- <?xml version="1.0" encoding="UTF-8"?>
- <animation-list android:oneshot="false"
- xmlns:android="http://schemas.android.com/apk/res/android">
- <item android:duration="100" android:drawable="@drawable/loading_1" />
- <item android:duration="100" android:drawable="@drawable/loading_2" />
- <item android:duration="100" android:drawable="@drawable/loading_3" />
- <item android:duration="100" android:drawable="@drawable/loading_4" />
- <item android:duration="100" android:drawable="@drawable/loading_5" />
- <item android:duration="100" android:drawable="@drawable/loading_6" />
- </animation-list>
- <prename="code"class="java"><itemname="android:indeterminateDrawable">@drawable/progress_circle_loading</item>
定義shape顏色 progress_circle_shape.xml
- <?xml version="1.0" encoding="utf-8"?>
- <rotate xmlns:android="http://schemas.android.com/apk/res/android"
- android:fromDegrees="0"
- android:pivotX="50%"
- android:pivotY="50%"
- android:toDegrees="360" >
- <shape
- android:innerRadiusRatio="3"
- android:shape="ring"
- android:thicknessRatio="8"
- android:useLevel="false" >
- <gradient
- android:centerColor="#FFFFFF"
- android:centerY="0.50"
- android:endColor="#1E90FF"
- android:startColor="#000000"
- android:type="sweep"
- android:useLevel="false" />
- </shape>
- </rotate>
style的indeterminateDrawable引入:
- <item name="android:indeterminateDrawable">@drawable/progress_circle_shape</item>
效果圖如下:
SeekBar的原理是一樣的,不信你看下圖,我就是用的seekbar
最後來張全家福: