↳ android.view.View
3 |
↳ android.widget.ProgressBar |
4 |
直接子类 |
5 |
AbsSeekBar |
6 |
间接子类 |
7 |
RatingBar, SeekBar |
在某些操作的进度中的可视指示器,为用户呈现操作的进度,还它有一个次要的进度条,用来显示中间进度,如在流媒体播放的缓冲区的进度。一个进度条也可不确定其进度。在不确定模式下,进度条显示循环动画。这种模式常用于应用程序使用任务的长度是未知的。进度条也就是一个表示运转的过程,例如发送短信,连接网络等等,表示一个过程正在执行中
1、android.widget. ProgressBar,继承自android.view.View 。在android.widget包中。对应对话框ProgressDialog。ProgressBar有两种展示方式,表盘形式(普通、小、大)和条形填充形式。在layout定义时,需要通过设施style属性类设置展示方式。
ProgressBar的样式有四种:
android:progressBarStyle:默认进度条样式,不确定模式
android:progressBarStyleHorizontal:水平进度条样式
android:progressBarStyleLarge :大号进度条样式,也是不确定进度模式
android:progressBarStyleSmall :小号进度条样式,也是不确定进度模式
二、XML重要属性
android:max-- 这事进度条长度最大值
android:progress--设定度条当前进度值
android:secondaryProgress--第二进度条进度值
android:progressBarStyle:默认进度条样式
android:progressBarStyleHorizontal:水平样式
style
=
"?android:attr/progressBarStyleLarge" --- 属性风格类型--大圆圈,如下图
style=”?android:attr/progressBarStyleSmall”
--- 属性风格类型--小圆圈,如下图:
style="?android:attr/progressBarStyleHorizontal" --水平进度条 --
如下图:
几秒钟之后自动滚到到如下:
也可以用下面的形式代替上面的形式的:
1 |
< ProgressBar style = "@android:style/Widget.ProgressBar.Inverse" />//中 |
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< ProgressBar style = "@android:style/Widget.ProgressBar.Large.Inverse" /> //大圆 |
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< ProgressBar style = "@android:style/Widget.ProgressBar.Small.Inverse" /> //小圆 |
三、重要方法
getMax():返回这个进度条的范围的上限
getProgress():返回进度
getSecondaryProgress():返回次要进度
incrementProgressBy(int diff):指定增加的进度
isIndeterminate():指示进度条是否在不确定模式下
setIndeterminate(boolean indeterminate):设置不确定模式下
setVisibility(int v):设置该进度条是否可视
四、重要事件
onSizeChanged(int w, int h, int oldw, int oldh):当进度值改变时引发此事件
接下来看案例:
1.定义一个布局文件progressbar.xml
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<? xml version = "1.0" encoding = "utf-8" ?> |
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< ScrollView xmlns:android = "http://schemas.android.com/apk/res/android" |
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|
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android:layout_width = "fill_parent" |
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android:layout_height = "match_parent" |
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> |
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< LinearLayout |
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android:layout_width = "fill_parent" |
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android:layout_height = "match_parent" |
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android:orientation = "vertical" > |
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< TextView |
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android:id = "@+id/startText" |
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android:layout_width = "fill_parent" |
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android:layout_height = "wrap_content" |
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android:text = "垂直的----标题上面也有一个进度条哦" |
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android:textColor = "#CD0000" |
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android:background = "#BC8F8F" |
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/> |
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<!-- style=”?android:attr/progressBarStyleLarge”大圆圈 --> |
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< ProgressBar |
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android:id = "@+id/progtessBer_btn_id1" |
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android:layout_width = "wrap_content" |
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android:layout_height = "wrap_content" |
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style = "?android:attr/progressBarStyleLarge" |
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/> |
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<!-- style=”?android:attr/progressBarStyleSmall”小圆圈 --> |
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< ProgressBar |
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android:layout_width = "wrap_content" |
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android:layout_height = "wrap_content" |
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style = "?android:attr/progressBarStyleSmall" |
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android:layout_gravity = "center_horizontal" |
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/> |
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< TextView |
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android:id = "@+id/startText1" |
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android:layout_width = "fill_parent" |
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android:layout_height = "wrap_content" |
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android:text = "水平的" |
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android:textColor = "#aaaaaa" |
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/> |
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<!-- style="?android:attr/progressBarStyleHorizontal" 水平进度条 --> |
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< ProgressBar |
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android:id = "@+id/progtessBer_btn_id2" |
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android:layout_width = "fill_parent" |
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android:layout_height = "wrap_content" |
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style = "?android:attr/progressBarStyleHorizontal" |
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/> |
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< TextView |
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android:layout_width = "fill_parent" |
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android:layout_height = "wrap_content" |
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android:text = "@string/progress_text" |
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/> |
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</ LinearLayout > |
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</ ScrollView > |
2.之后定义java文件:ProgressBarDemo.java
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package com.dream.app.start.first.prograssbar; |
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import com.dream.app.start.MenuDemo; |
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import com.dream.app.start.R; |
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import com.dream.app.start.R.id; |
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import com.dream.app.start.R.layout; |
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import com.dream.app.start.utils.PublicClass; |
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import android.app.Activity; |
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import android.content.Intent; |
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import android.os.Bundle; |
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import android.os.Handler; |
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import android.text.method.ScrollingMovementMethod; |
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import android.view.View; |
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import android.view.View.OnClickListener; |
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import android.view.Window; |
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import android.widget.AdapterView; |
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import android.widget.AdapterView.OnItemClickListener; |
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import android.widget.ArrayAdapter; |
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import android.widget.Button; |
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import android.widget.ListView; |
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import android.widget.ProgressBar; |
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import android.widget.TextView; |
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import android.widget.Toast; |
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public class ProgressBarDemo extends PublicClass { |
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private ProgressBar progressbar,progressbar_1; |
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Button btn1,btn2; |
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private int prostatus= 0 ; |
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//创建一个handler对象 |
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private Handler handler= new Handler(); |
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@Override |
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protected void onCreate(Bundle savedInstanceState) { |
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// TODO Auto-generated method stub |
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super .onCreate(savedInstanceState); |
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|
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|
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//在标题条里放置进度条。请求窗口特色风格,这里设置成不明确的进度风格 |
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requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS); |
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|
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//设置窗口进度条特性风格 |
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// requestWindowFeature(Window.FEATURE_PROGRESS); |
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|
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setContentView(R.layout.progressbar); |
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//设置标题栏中的不明确的进度条是否可以显示,当你需要表示处理中的时候设置为True,处理完毕后设置为false |
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setProgressBarIndeterminateVisibility( true ); |
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|
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//设置进度条进度值,要乘以100的 |
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// setProgress(60*100); |
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// setSecondaryProgress(80*100); |
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btn2=(Button)findViewById(R.id.button_cancel); |
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// btn2.setOnClickListener(onClick); |
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progressbar=(ProgressBar)findViewById(R.id.progtessBer_btn_id2); |
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progressbar_1=(ProgressBar)findViewById(R.id.progtessBer_btn_id1); |
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//设置进度条的最大值 |
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progressbar.setMax( 100000 ); |
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progressbar_1.setMax( 100000 ); |
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//新开启一个进程 |
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new Thread( new Runnable() { |
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|
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@Override |
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public void run() { |
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// 循环1000次,不断地更新prostatus状态值 |
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while (prostatus++< 100000 ) { |
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//将一个Runnable对象添加到消息队列中去 |
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//并且当执行该对象的时候,执行run |
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handler.post( new Runnable() { |
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|
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@Override |
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public void run() { |
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//重新设置进度条当前的值 |
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progressbar.setProgress(prostatus); |
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progressbar_1.setProgress(prostatus); |
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|
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} |
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}); |
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} |
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} |
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}).start(); |
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|
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} |
84 |
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//toast方法 |
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private void toastshow(String str) { |
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Toast.makeText(getApplicationContext(), str, Toast.LENGTH_SHORT).show(); |
88 |
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} |
90 |
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} |
运行效果如下:
二:用图片实现滚动效果:
1.添加图片到drawable下
2.自定义图片资源文件iamge_progress.xml
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<? xml version = "1.0" encoding = "utf-8" ?> |
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< animated-rotate |
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xmlns:android = "http://schemas.android.com/apk/res/android" |
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android:drawable = "@drawable/image_progress" |
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android:pivotX = "50%" |
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android:pivotY = "50%" |
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/> |
3.定义布局文件,progress.xml
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<? xml version = "1.0" encoding = "utf-8" ?> |
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< LinearLayout xmlns:android = "http://schemas.android.com/apk/res/android" |
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android:orientation = "vertical" |
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android:layout_width = "fill_parent" |
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android:layout_height = "fill_parent" |
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android:gravity = "center" > |
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< ProgressBar |
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android:indeterminateDrawable = "@drawable/drawable_progress" |
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android:layout_height = "100dp" |
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android:layout_width = "100dp" /> |
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</ LinearLayout > |
运行效果如下:
三》自定义渐变色进度条:
定义drawable资源文件color_progressbar.xml
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<? xml version = "1.0" encoding = "utf-8" ?> |
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< layer-list xmlns:android = "http://schemas.android.com/apk/res/android" > |
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< item android:id = "@android:id/background" > |
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< shape > |
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< corners android:radius = "5dip" /> |
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< gradient android:startColor = "#ff9d9e9d" |
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android:centerColor = "#ff5a5d5a" |
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android:centerY = "0.75" |
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android:endColor = "#ff747674" |
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android:angle = "270" |
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/> |
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</ shape > |
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</ item > |
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< item android:id = "@android:id/secondaryProgress" > |
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< clip > |
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< shape > |
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< corners |