ProgressBar of common Android components

The ProgressBar component is a progress bar that cannot be dragged, and he is able to display the current download progress, which contains a sub-progress bar, such as the buffering progress shown when playing streaming media.

The example is to control the increment and decrement of the main progress bar and the sub-progress bar by four keys respectively.

First, the layout file code:

<linearlayout xmlns:android= "Http://schemas.android.com/apk/res/android"     xmlns: tools= "Http://schemas.android.com/tools"     android:id= "@+id/linearlayout2"      android:layout_width= "Match_parent"     android:layout_height= "Match_parent"     android:orientation= "vertical"     tools:context= "main.test_ ProgressBar. Mainactivity " >    <ProgressBar         Android:id= "@+id/progressbar1"         style= "? android:attr/ Progressbarstylehorizontal "        android:layout_width=" Fill_parent "         android:layout_height= "50DP"          android:max= "        android:progress=" 300 "      &Nbsp;  android:secondaryprogress= "        android": visibility= "visible"         android:background= "#ffffff00"  />         <!-- visibility is to set the progress bar visible, progress is the main progress bar and assigns an initial value of 300, Secondaryprogress is a sub-progress bar assigned an initial value of 400 -->    <linearlayout         android:layout_width= "Match_parent"          android:layout_height= "Wrap_content"  >        <Button             android:id= "@+id/button1_1"              android:layout_width= "Wrap_content"              android:layout_height= "Wrap_content"               android:text= "@string/btn1_1"  />         <button            android:id= "@+id/button1_2"             android:layout_width= "Wrap_content"             android:layout_height= "Wrap_content"             android:text= "@string/btn1_2"  / >    </LinearLayout>    <LinearLayout         android:layout_width= "Match_parent"          android:layout_height= "Wrap_content"  >        <button             android:id= "@+id/button2_1"        &nBsp;     android:layout_width= "Wrap_content"              android:layout_height= "Wrap_content"              android:text= "@string/btn2_1"  />         <button            android:id = "@+id/button2_2"             android:layout_width= "Wrap_content"             android:layout_height= " Wrap_content "            android:text=" @string/ Btn2_2 " />    </LinearLayout></LinearLayout>

Second on the Strings.xml file:

<?xml version= "1.0" encoding= "Utf-8"?><resources> <string name= "App_name" >test_progressbar</  string> <string name= "Btn1_1" > main minus </string> <string name= "Btn1_2" > main increment </string> <string Name= "Btn2_1" > VP </string> <string name= "Btn2_2" > sub-increment </string> </resources>

Again on Android source file:

package main.test_progressbar;import android.os.bundle;import  android.support.v7.app.actionbaractivity;import android.view.view;import  android.view.view.onclicklistener;import android.widget.button;import android.widget.progressbar; public class mainactivity extends actionbaractivity implements onclicklistener{     private progressbar pbar=null;    private button  btn1_1=null,btn1_2=null,btn2_1=null,btn2_2=null;        @ Override    protected void oncreate (bundle savedinstancestate)  {         super.oncreate (savedinstancestate);         setcontentview (R.layout.activity_main);                 pbar= (ProgressBar) Findviewbyid (r.id.progressBAR1);                 btn1_1= ( button) Findviewbyid (r.id.button1_1);         btn1_2= (Button) Findviewbyid (r.id.button1_2);         btn2_1= (Button) findViewById ( R.id.button2_1);         btn2_2= (Button) Findviewbyid (R.id.button2_2);                 btn1_1. Setonclicklistener (mainactivity.this);         btn1_2. Setonclicklistener (mainactivity.this);         btn2_1. Setonclicklistener (mainactivity.this);         btn2_2. Setonclicklistener (mainactivity.this);             }     @Override     public void onclicK (view arg0)  {        // TODO Auto-generated  Method stub        int n = arg0.getid ();//Get ID         switch  (n)  {//if it is the corresponding ID, increase or decrease the progress value          case r.id.button1_1: pbar.incrementprogressby ( -10); break;         case r.id.button1_2: pbar.incrementprogressby (Ten);  break;        case r.id.button2_1:  Pbar.incrementsecondaryprogressby ( -10); break;        case  R.id.button2_2: pbar.incrementsecondaryprogressby (Ten); break;         default: break;        }    }}

Finally, the test results are as follows:

ProgressBar of common Android components