效果

效果

要点

• seekBar是progressBar的子类

• 主要方法setMax，setProgress，setSecondaryProgress
• 实现OnSeekBarChangeListener接口，可进行事件监听
• 自定义进度条样式：
  android:progressDrawable——进度条
  android:thumb——拖动按钮

源码

1、activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"    
    tools:context=".MainActivity"
    android:padding="10dip">

    <SeekBar
        android:id="@+id/seekBar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"       
        android:max="100"
        android:progress="50"/>
    
    <TextView 
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/tv1"/>
    
    <TextView 
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/tv2"/>

</LinearLayout>

2、MainActivity

public class MainActivity extends Activity implements OnSeekBarChangeListener{
    
    private SeekBar seekBar;
    private TextView tv1, tv2;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        
        super.onCreate(savedInstanceState);     
        setContentView(R.layout.activity_main);
        
        seekBar = (SeekBar) findViewById(R.id.seekBar);
        tv1 = (TextView) findViewById(R.id.tv1);
        tv2 = (TextView) findViewById(R.id.tv2);
        
        
        seekBar.setOnSeekBarChangeListener(this);
    }

    @Override
    public void onProgressChanged(SeekBar seekBar, int progress,
            boolean fromUser) {
        tv1.setText("正在拖动");
        tv2.setText("当前进度为"+progress);
        
    }

    @Override
    public void onStartTrackingTouch(SeekBar seekBar) {
        
        tv1.setText("开始拖动");    
    }

    @Override
    public void onStopTrackingTouch(SeekBar seekBar) {
        tv1.setText("停止拖动");    
    }
}