java.lang.Object
↳ android.view.View
↳ android.widget.ProgressBar
直接子类
AbsSeekBar
间接子类
RatingBar, SeekBar
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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:
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<
ProgressBar
style
=
"@android :style/Widget.ProgressBar.Inverse"
/>//中
<
ProgressBar
style
=
"@android :style/Widget.ProgressBar.Large.Inverse"
/> //大圆
<
ProgressBar
style
=
"@android :style/Widget.ProgressBar.Small.Inverse"
/> //小圆
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三、重要方法
getMax():返回这个进度条的范围的上限
getProgress():返回当前进度值
getSecondaryProgress():返回次要当前进度值
incrementProgressBy(int diff):指定增加的进度--即步长
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"
?>
<
ScrollView
xmlns:android
=
"http://schemas.android.com/apk/res/android"
android:layout_width
=
"fill_parent"
android:layout_height
=
"match_parent"
>
<
LinearLayout
android:layout_width
=
"fill_parent"
android:layout_height
=
"match_parent"
android:orientation
=
"vertical"
>
<
TextView
android:id
=
"@+id/startText"
android:layout_width
=
"fill_parent"
android:layout_height
=
"wrap_content"
android:text
=
"垂直的----标题上面也有一个进度条哦"
android:textColor
=
"#CD0000"
android:background
=
"#BC8F8F"
/>
<!-- style=”?android:attr/progressBarStyleLarge”大圆圈 -->
<
ProgressBar
android:id
=
"@+id/progtessBer_btn_id1"
android:layout_width
=
"wrap_content"
android:layout_height
=
"wrap_content"
style
=
"?android:attr/progressBarStyleLarge"
/>
<!-- style=”?android:attr/progressBarStyleSmall”小圆圈 -->
<
ProgressBar
android:layout_width
=
"wrap_content"
android:layout_height
=
"wrap_content"
style
=
"?android:attr/progressBarStyleSmall"
android:layout_gravity
=
"center_horizontal"
/>
<
TextView
android:id
=
"@+id/startText1"
android:layout_width
=
"fill_parent"
android:layout_height
=
"wrap_content"
android:text
=
"水平的"
android:textColor
=
"#aaaaaa"
/>
<!-- style="?android:attr/progressBarStyleHorizontal" 水平进度条 -->
<
ProgressBar
android:id
=
"@+id/progtessBer_btn_id2"
android:layout_width
=
"fill_parent"
android:layout_height
=
"wrap_content"
style
=
"?android:attr/progressBarStyleHorizontal"
/>
<
TextView
android:layout_width
=
"fill_parent"
android:layout_height
=
"wrap_content"
android:text
=
"@string/progress_text"
/>
</
LinearLayout
>
</
ScrollView
>
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2.之后定义java文件:ProgressBarDemo.java
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package
com.dream.app.start.first.prograssbar;
import
com.dream.app.start.MenuDemo;
import
com.dream.app.start.R;
import
com.dream.app.start.R.id;
import
com.dream.app.start.R.layout;
import
com.dream.app.start.utils.PublicClass;
import
android.app.Activity;
import
android.content.Intent;
import
android.os.Bundle;
import
android.os.Handler;
import
android.text.method.ScrollingMovementMethod;
import
android.view.View;
import
android.view.View.OnClickListener;
import
android.view.Window;
import
android.widget.AdapterView;
import
android.widget.AdapterView.OnItemClickListener;
import
android.widget.ArrayAdapter;
import
android.widget.Button;
import
android.widget.ListView;
import
android.widget.ProgressBar;
import
android.widget.TextView;
import
android.widget.Toast;
public
class
ProgressBarDemo
extends
PublicClass {
private
ProgressBar progressbar,progressbar_1;
Button btn1,btn2;
private
int
prostatus=
0
;
//创建一个handler对象
private
Handler handler=
new
Handler();
@Override
protected
void
onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super
.onCreate(savedInstanceState);
//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
requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
//设置窗口进度条特性风格
// requestWindowFeature(Window.FEATURE_PROGRESS);
setContentView(R.layout.progressbar);
//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
setProgressBarIndeterminateVisibility(
true
);
//设置进度条进度值,要乘以100的
// setProgress(60*100);
// setSecondaryProgress(80*100);
btn2=(Button)findViewById(R.id.button_cancel);
// btn2.setOnClickListener(onClick);
progressbar=(ProgressBar)findViewById(R.id.progtessBer_btn_id2);
progressbar_1=(ProgressBar)findViewById(R.id.progtessBer_btn_id1);
//设置进度条的最大值
progressbar.setMax(
100000
);
progressbar_1.setMax(
100000
);
//新开启一个进程
new
Thread(
new
Runnable() {
@Override
public
void
run() {
// 循环1000次,不断地更新prostatus状态值
while
(prostatus++<
100000
) {
//将一个Runnable对象添加到消息队列中去
//并且当执行该对象的时候,执行run
handler.post(
new
Runnable() {
@Override
public
void
run() {
//重新设置进度条当前的值
progressbar.setProgress(prostatus);
progressbar_1.setProgress(prostatus);
}
});
}
}
}).start();
}
//toast方法
private
void
toastshow(String str) {
Toast.makeText(getApplicationContext(), str, Toast.LENGTH_SHORT).show();
}
}
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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"
?>
<
animated-rotate
xmlns:android
=
"http://schemas.android.com/apk/res/android"
android:drawable
=
"@drawable/image_progress"
android:pivotX
=
"50%"
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"
?>
<
LinearLayout
xmlns:android
=
"http://schemas.android.com/apk/res/android"
android:orientation
=
"vertical"
android:layout_width
=
"fill_parent"
android:layout_height
=
"fill_parent"
android:gravity
=
"center"
>
<
ProgressBar
android:indeterminateDrawable
=
"@drawable/drawable_progress"
android:layout_height
=
"100dp"
android:layout_width
=
"100dp"
/>
</
LinearLayout
>
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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"
?>
<
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
=
"#FF3030"
android:endColor
=
"#AEEEEE"
android:angle
=
"270"
/>
</
shape
>
</
clip
>
</
item
>
</
layer-list
>
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2.定义对应的不布局文件:progressbar.xml在此文件中引用我们定义的drawable资源配置文件
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<?
xml
version
=
"1.0"
encoding
=
"utf-8"
?>
<
LinearLayout
xmlns:android
=
"http://schemas.android.com/apk/res/android"
android:orientation
=
"vertical"
android:layout_width
=
"fill_parent"
android:layout_height
=
"fill_parent"
android:gravity
=
"center"
>
<
ProgressBar
android:id
=
"@+id/color_progressBar"
android:indeterminateDrawable
=
"@drawable/color_progress"
android:layout_height
=
"wrap_content"
android:layout_width
=
"match_parent"
/>
</
LinearLayout
>
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或者在代码中给进度条设置自定义资源文件:
效果如下:
四:自定义progressbar颜色:
1.定义一个图片资源文件:
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<?
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
=
"#FFFF00"
android:startColor
=
"#000000"
android:type
=
"sweep"
android:useLevel
=
"false"
/>
</
shape
>
</
rotate
>
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2.定义布局文件:
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<
ProgressBar
android:id
=
"@+id/color_progressBar2"
android:indeterminateDrawable
=
"@drawable/color_progress2"
android:layout_height
=
"wrap_content"
android:layout_width
=
"wrap_content"
/>
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3.效果: