Android UI ProgressBar (progress bar)

A progress bar is a very practical component used to display the progress percentage of a user's time-consuming operations. First, let's take a look at the progress bars of several styles supported by Android:

Style = "@ android: style/Widget. ProgressBar. Inverse" normal size progress bar

Style = "@ android: style/Widget. ProgressBar. Large" Large progress bar

Style = "@ android: style/Widget. ProgressBar. Large. Inverse" Large progress bar

Style = "@ android: style/Widget. ProgressBar. Small" Small progress bar
Style = "@ android: style/Widget. ProgressBar. Small. Inverse" Small progress bar

Style = "@ android: style/Widget. ProgressBar. Horizontal" Horizontal progress bar

Add the progress bars of these six different styles in the style file to see the effects on the simulator.

 

<? Xml version = "1.0" encoding = "UTF-8"?>
<LinearLayout xmlns: android = "http://schemas.android.com/apk/res/android"
Android: layout_width = "fill_parent"
Android: layout_height = "fill_parent"
Android: orientation = "vertical">
 
<TextView
Android: layout_width = "fill_parent"
Android: layout_height = "wrap_content"
Android: text = "progress bar Demo"/>
 
<ProgressBar
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: max = "1000"
Android: progress = "100"
Android: id = "@ + id/progressbar1"
/>

<ProgressBar
Style = "@ android: style/Widget. ProgressBar. Inverse"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: max = "100"
Android: progress = "20"
/>
<ProgressBar
Style = "@ android: style/Widget. ProgressBar. Large"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: max = "100"
Android: progress = "20"
/>
<ProgressBar
Style = "@ android: style/Widget. ProgressBar. Large. Inverse"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: max = "100"
Android: progress = "20"
/>
<ProgressBar
Style = "@ android: style/Widget. ProgressBar. Small"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: max = "100"
Android: progress = "20"
/>
<ProgressBar
Style = "@ android: style/Widget. ProgressBar. Small. Inverse"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: max = "100"
Android: progress = "20"
/>
<ProgressBar
Style = "@ android: style/Widget. ProgressBar. Horizontal"
Android: layout_marginTop = "30dp"
Android: layout_width = "fill_parent"
Android: layout_height = "wrap_content"
Android: max = "1000"
Android: progress = "500"
Android: secondaryProgress = "300"
Android: id = "@ + id/progressbar2"
/>
</LinearLayout>
<? Xml version = "1.0" encoding = "UTF-8"?>
<LinearLayout xmlns: android = "http://schemas.android.com/apk/res/android"
Android: layout_width = "fill_parent"
Android: layout_height = "fill_parent"
Android: orientation = "vertical">

<TextView
Android: layout_width = "fill_parent"
Android: layout_height = "wrap_content"
Android: text = "progress bar Demo"/>

<ProgressBar
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: max = "1000"
Android: progress = "100"
Android: id = "@ + id/progressbar1"
/>

<ProgressBar
Style = "@ android: style/Widget. ProgressBar. Inverse"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: max = "100"
Android: progress = "20"
/>
<ProgressBar
Style = "@ android: style/Widget. ProgressBar. Large"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: max = "100"
Android: progress = "20"
/>
<ProgressBar
Style = "@ android: style/Widget. ProgressBar. Large. Inverse"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: max = "100"
Android: progress = "20"
/>
<ProgressBar
Style = "@ android: style/Widget. ProgressBar. Small"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: max = "100"
Android: progress = "20"
/>
<ProgressBar
Style = "@ android: style/Widget. ProgressBar. Small. Inverse"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: max = "100"
Android: progress = "20"
/>
<ProgressBar
Style = "@ android: style/Widget. ProgressBar. Horizontal"
Android: layout_marginTop = "30dp"
Android: layout_width = "fill_parent"
Android: layout_height = "wrap_content"
Android: max = "1000"
Android: progress = "500"
Android: secondaryProgress = "300"
Android: id = "@ + id/progressbar2"
/>
</LinearLayout> effects on simulators:

 

There is no declared style for the first progress bar from top to bottom. It is a normal size progress bar like the second, and a large progress bar for the third and fourth by default, the fifth, sixth, is a small progress bar, and the last is a horizontal progress bar.

In addition to the following common attributes of style ProgressBar:

Android: max sets the maximum value of the progress bar (the last horizontal progress bar is set to 1000)

Android: progress sets the current progress (the last horizontal progress bar sets the current progress to 500)

Android: secondaryProgress sets the second progress bar

 

Simulate the progress change of a progress bar:

Package cn. class3g. activity;
 
Import android. app. Activity;
Import android. OS. Bundle;
Import android. OS. Handler;
Import android. util. Log;
Import android. widget. ProgressBar;
 
Public class ProgressBarDemo extends Activity {

ProgressBar progressbar = null;
Static int I = 0;
Int progressbarMax = 0;
 
Handler handler = new Handler ();

Public void onCreate (Bundle savedInstanceState ){
Super. onCreate (savedInstanceState );
SetContentView (R. layout. progressbar_layout );

FindViews ();
}
 
Private void findViews (){
Progressbar = (ProgressBar) this. findViewById (R. id. progressbar2 );
Progressbar. setMax (1000 );
ProgressbarprogressbarMax = progressbar. getMax ();


// Use a thread to control the progress of the progress bar
New Thread (new Runnable (){

Public void run (){
While (I <progressbarMax ){
// DoWord () simulates the progress of a task
I = doWork ();

Handler. post (new Runnable (){
Public void run (){
Progressbar. setProgress (I );
}
});
Try {
Thread. sleep (50 );
} Catch (InterruptedException e ){
// TODO Auto-generated catch block
E. printStackTrace ();
}
}
}
}). Start ();
 
}

Public int doWork (){
Log. d ("TAG", String. valueOf (I ));
Return ++ I;
}
}
Package cn. class3g. activity;

Import android. app. Activity;
Import android. OS. Bundle;
Import android. OS. Handler;
Import android. util. Log;
Import android. widget. ProgressBar;

Public class ProgressBarDemo extends Activity {

ProgressBar progressbar = null;
Static int I = 0;
Int progressbarMax = 0;

Handler handler = new Handler ();
 
Public void onCreate (Bundle savedInstanceState ){
Super. onCreate (savedInstanceState );
SetContentView (R. layout. progressbar_layout );

FindViews ();
}

Private void findViews (){
Progressbar = (ProgressBar) this. findViewById (R. id. progressbar2 );
Progressbar. setMax (1000 );
ProgressbarMax = progressbar. getMax ();


// Use a thread to control the progress of the progress bar
New Thread (new Runnable (){

Public void run (){
While (I <progressbarMax ){
// DoWord () simulates the progress of a task
I = doWork ();

Handler. post (new Runnable (){
Public void run (){
Progressbar. setProgress (I );
}
});
Try {
Thread. sleep (50 );
} Catch (InterruptedException e ){
// TODO Auto-generated catch block
E. printStackTrace ();
}
}
}
}). Start ();

}
 
Public int doWork (){
Log. d ("TAG", String. valueOf (I ));
Return ++ I;
}
} Results:

 

Author: jjaze3344