Android SeekBar(带滑动块的进度条)的应用举例

Android SeekBar(带滑动块的进度条)的应用举例

AppMain.java

1. package lxy.listsoft;  
2.   
3. import Android.app.Activity;  
4. import android.os.Bundle;  
5. import android.util.Log;  
6. import android.widget.SeekBar;  
7. import android.widget.TextView;  
8.   
9. public class AppMain extends Activity {  
10.   
11.     private TextView textView;  
12.     private SeekBar seekBar;  
13.     int seekBarProgress;  
14.     MyThread thread;  
15.     boolean key = true;  
16.       
17.     public void onCreate(Bundle savedInstanceState) {  
18.         super.onCreate(savedInstanceState);  
19.         setContentView(R.layout.main);  
20.           
21.         textView = (TextView)findViewById(R.id.testView01);  
22.         seekBar = (SeekBar)findViewById(R.id.seekBar01);  
23.         seekBar.setMax(200);  
24.         seekBar.setOnSeekBarChangeListener(new SeekBarListener());  
25.     }  
26.       
27.     protected void onResume() {  
28.         super.onResume();  
29.           
30.         thread = new MyThread();  
31.         thread.start();  
32.     }  
33.   
34.     //SeekBar的监听器   
35.     class SeekBarListener implements SeekBar.OnSeekBarChangeListener{  
36.   
37.         //当进度改变时，参数fromUser判断是不是进度的改变由用户手动引起   
38.         public void onProgressChanged(SeekBar seekBar, int progress,  
39.                 boolean fromUser) {  
40.             if(fromUser){  
41.                 Log.d("test", ""+progress);  
42.                 seekBarProgress = progress;  
43.             }  
44.             textView.setText(""+progress);  
45.         }  
46.   
47.         //当用户开始滑动时   
48.         public void onStartTrackingTouch(SeekBar seekBar) {  
49.             key = false;  
50.             Log.d("test", "myThread stop");  
51.         }  
52.   
53.         //当用户结束滑动时   
54.         public void onStopTrackingTouch(SeekBar seekBar) {  
55.             Log.d("test", "myThread isAlive"+thread.isAlive());  
56.             key = true;  
57.             thread = new MyThread();  
58.             thread.start();  
59.             Log.d("test", "myThread isAlive"+thread.isAlive());  
60.         }  
61.     }  
62.       
63.     class MyThread extends Thread{  
64.         public void run() {  
65.             super.run();  
66.               
67.             while(key){  
68.                 try {  
69.                     Thread.sleep(500);  
70.                 } catch (InterruptedException e) {  
71.                     e.printStackTrace();  
72.                 }  
73.                 seekBarProgress++;  
74.                 if(seekBarProgress > 200){  
75.                     seekBarProgress = 0;  
76.                 }  
77.                 seekBar.setProgress(seekBarProgress);  
78.             }  
79.         }  
80.     }  
81. }  

1. <?xml version="1.0" encoding="utf-8"?>  
2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
3.     android:orientation="vertical"  
4.     android:layout_width="fill_parent"  
5.     android:layout_height="fill_parent"  
6.     >  
7. <TextView    
8.     android:id="@+id/testView01"  
9.     android:textSize="20pt"  
10.     android:gravity="center_vertical|center_horizontal"  
11.     android:layout_width="fill_parent"   
12.     android:layout_height="wrap_content"   
13.     android:text="0"/>  
14. <SeekBar  
15.     android:id="@+id/seekBar01"  
16.     android:layout_width="fill_parent"  
17.     android:layout_height="wrap_content"></SeekBar>  
18. </LinearLayout>