本文实例讲述了Android中ProgressBar用法。分享给大家供大家参考，具体如下：
在android中会经常用到ProgressBar,下面通过举例来说明如何使用ProgressBar。
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 A03Activity extends Activity { private ProgressBar rectangle,circle; private Button showProgressBar; private final static int STOP=0x10000; private final static int NEXT=0x10001; private int count=0; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); rectangle=(ProgressBar)findViewById(R.id.rectangle); circle=(ProgressBar)findViewById(R.id.circle); showProgressBar=(Button)findViewById(R.id.showProgressBar); rectangle.setIndeterminate(false); circle.setIndeterminate(false); showProgressBar.setOnClickListener(new OnClickListener(){ @Override public void onClick(View v) { // TODO Auto-generated method stub rectangle.setVisibility(View.VISIBLE); circle.setVisibility(View.VISIBLE); rectangle.setMax(100); rectangle.setProgress(0); circle.setProgress(0); Thread t=new Thread(new Runnable(){ @Override public void run() { // TODO Auto-generated method stub for(int i=0;i<20;i++){ try { count=(i+1)*5; Thread.sleep(1000); if(count==19){ Message msg=new Message(); msg.what=STOP; handler.sendMessage(msg); break; } else{ Message msg=new Message(); msg.what=NEXT; handler.sendMessage(msg); } } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } }); t.start(); } }); } private Handler handler=new Handler(){ @SuppressWarnings("static-access") public void handleMessage(Message msg){ switch(msg.what){ case STOP: rectangle.setVisibility(View.GONE); circle.setVisibility(View.GONE); Thread.currentThread().interrupt(); break; case NEXT: if(!Thread.currentThread().interrupted()){ rectangle.setProgress(count); circle.setProgress(count); } break; } } }; }
res/layout/main.xml如下所示：
<?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="@string/hello" /> <ProgressBar android:id="@+id/rectangle" android:layout_width="fill_parent" android:layout_height="wrap_content" style="?android:attr/progressBarStyleHorizontal" mce_style="?android:attr/progressBarStyleHorizontal" android:visibility="gone" /> <ProgressBar android:id="@+id/circle" android:layout_width="wrap_content" android:layout_height="wrap_content" style="?android:attr/progressBarStyleLarge" mce_style="?android:attr/progressBarStyleLarge" android:visibility="gone" /> <Button android:id="@+id/showProgressBar" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="show ProgressBar" /> </LinearLayout>
更多关于Android控件相关内容感兴趣的读者可查看本站专题：《Android控件用法总结》
希望本文所述对大家Android程序设计有所帮助。