Step by step _ Android development course [23] _ ProgressBar (progress bar) on the user interface, android User Interface Design

Step by step _ Android development course [23] _ ProgressBar (progress bar) on the user interface, android User Interface Design

Focus on technology, enjoy life! -- QQ: 804212028.
Link: http://blog.csdn.net/y18334702058/article/details/44624305

• Topic: ProgressBar on the user interface (progress bar)
  -
  Custom progress bar (Instance ):

Activity_main.xml:

<? 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"> <Button android: id = "@ + id/button" android: layout_width = "fill_parent" android: layout_height = "wrap_content" android: text = "enable ProgressBar"/> <ProgressBar android: id = "@ + id/progressBar1" style = "? Android: attr/progressBarStyleLarge "android: layout_width =" wrap_content "android: layout_height =" wrap_content "android: progress =" 0 "android: visibility =" gone "/> <ProgressBar android: id = "@ + id/progressBar2" android: layout_width = "fill_parent" android: layout_height = "10dip" android: max = "100" android: progress = "0" android: secondaryProgress = "0" style = "? Android: attr/progressBarStyleHorizontal "android: progressDrawable =" @ drawable/progressbar_layer_list "android: background =" @ drawable/progressbar_box "android: visibility =" gone "/> </LinearLayout>

Create a drawable file under the res file, and then create progressbar_layer_list.xml under the drawable file.
Progressbar_layer_list.xml:

<?xml version="1.0" encoding="UTF-8"?><layer-list xmlns:android="http://schemas.android.com/apk/res/android">    <item android:id="@android:id/background">        <clip>            <shape>                <corners android:radius="15dip" />                <gradient android:startColor="#00b7ee" android:endColor="#0075a9" android:angle="270" android:centerY="0.75"/>            </shape>        </clip>    </item>    <item android:id="@android:id/secondaryProgress">        <clip>            <shape>                <corners android:radius="15dip" />                <gradient android:startColor="#00b7ee" android:endColor="#0075a9" android:angle="270" android:centerY="0.75"/>            </shape>        </clip>    </item>    <item android:id="@android:id/progress">        <clip>            <shape>                <gradient android:startColor="#00b7ee" android:endColor="#0075a9" android:angle="270" android:centerY="0.25"/>                <corners android:radius="15dip"/>            </shape>        </clip>    </item></layer-list>

Progressbar_box image resources are as follows:

MainActivity. java source code:

Import android. app. activity; import android. OS. bundle; import android. OS. handler; import android. OS. message; import android. view. view; import android. view. view. onClickListener; import android. widget. button; import android. widget. progressBar; public class MainActivity extends Activity {private ProgressBar pro1, pro2; private Button button; private int count; @ Override public void onCreate (Bundle savedInsta NceState) {super. onCreate (savedInstanceState); setContentView (R. layout. activity_main); button = (Button) findViewById (R. id. button); pro1 = (ProgressBar) findViewById (R. id. progressBar1); pro2 = (ProgressBar) findViewById (R. id. progressBar2); // set whether the progress bar is automatically running. If the value is false, pro1.setIndeterminate (false); pro2.setIndeterminate (false); button. setOnClickListener (new OnClickListener () {@ Override public void onC Lick (View arg0) {// set ProgressBar to visible State pro1.setVisibility (View. VISIBLE); pro2.setVisibility (View. VISIBLE); // TODO Auto-generated method stub new Thread (new Runnable () {public void run () {for (int I = 0; I <10; I ++) {try {count = I * 10; Thread. sleep (1000); if (count> = 100) {Message msg = new Message (); msg. what = 1; MainActivity. this. myHandler. sendMessage (msg);} else {Message msg = new Message (); msg. What = 2; MainActivity. this. myHandler. sendMessage (msg) ;}} catch (Exception e) {e. printStackTrace ();}}}}). start () ;}}) ;}handler myHandler = new Handler () {public void handleMessage (Message msg) {switch (msg. what) {case 1: Thread. currentThread (). interrupt (); break; case 2: if (! Thread. currentThread (). isInterrupted () {// change the current value of ProgressBar pro1.setProgress (count); pro2.setProgress (count ); // set a progress bar value in the title bar. // setProgress (count * 100 ); // set a progress bar value behind the title bar // setSecondaryProgress (count * 100);} break;} super. handleMessage (msg );}};}

Running result:

Focus on technology, enjoy life! -- QQ: 804212028.
Link: http://blog.csdn.net/y18334702058/article/details/44624305