main.xml
<?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"> <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="Welcome to Mr Wei's blog" /> <ProgressBar android:id="@+id/rectangleProgressBar" style="?android:attr/progressBarStyleHorizontal" mce_style="?android:attr/progressBarStyleHorizontal" android:layout_width="fill_parent" android:layout_height="wrap_content" android:visibility="gone" /> <ProgressBar android:id="@+id/circleProgressBar" style="?android:attr/progressBarStyleLarge" mce_style="?android:attr/progressBarStyleLarge" android:layout_width="wrap_content" android:layout_height="wrap_content" android:visibility="gone" /> <Button android:id="@+id/button" android:text="Show ProgressBar" android:layout_width="wrap_content" android:layout_height="wrap_content" /> </LinearLayout>
public class ProgressBarDemo extends Activity { private ProgressBar rectangleProgressBar, circleProgressBar; private Button mButton; protected static final int STOP = 0x10000; protected static final int NEXT = 0x10001; private int iCount = 0; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.progress_bar_demo); // findView By id rectangleProgressBar = (ProgressBar) findViewById(R.id.rectangleProgressBar); circleProgressBar = (ProgressBar) findViewById(R.id.circleProgressBar); mButton = (Button) findViewById(R.id.button); rectangleProgressBar.setIndeterminate(false); circleProgressBar.setIndeterminate(true); mButton.setOnClickListener(new Button.OnClickListener() { public void onClick(View v) { rectangleProgressBar.setVisibility(View.VISIBLE); circleProgressBar.setVisibility(View.VISIBLE); rectangleProgressBar.setMax(100); rectangleProgressBar.setProgress(0); circleProgressBar.setProgress(0); new IncreaseThread().start(); } }); } // 定义一个Handler private Handler mHandler = new Handler() { public void handleMessage(Message msg) { switch (msg.what) { case STOP: rectangleProgressBar.setVisibility(View.GONE); circleProgressBar.setVisibility(View.GONE); Thread.currentThread().interrupt(); break; case NEXT: if (!Thread.currentThread().isInterrupted()) { rectangleProgressBar.setProgress(iCount); circleProgressBar.setProgress(iCount); } break; } } }; // 每秒步长为5增加,到100%时停止 class IncreaseThread extends Thread { @Override public void run() { for (int i = 0; i < 20; i++) { try { iCount = (i + 1) * 5; Thread.sleep(1000); if (i == 19) { Message msg = new Message(); msg.what = STOP; mHandler.sendMessage(msg); break; } else { Message msg = new Message(); msg.what = NEXT; mHandler.sendMessage(msg); } } catch (Exception e) { e.printStackTrace(); } } } }}