拖拽进度条（SeekBar）

监听方法：setOnSeekBarChangeListener

监听器：SeekBar.OnSeekBarChangeListener

简单，直接上代码：

1.Activity

//拖拽进度条
public class SeekBarActivity extends Activity {

    private Context context;
    private SeekBar seekBar;
    private TextView textView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.seek_bar);

        context = this;
        seekBar = (SeekBar)findViewById(R.id.seekBarId);
        textView = (TextView)findViewById(R.id.textViewId);

        seekBar.setMax(100);

        seekBar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
            //停止触摸
            public void onStopTrackingTouch(SeekBar seekBar) {
                int progress = seekBar.getProgress();
                Toast.makeText(context, "停止触摸", Toast.LENGTH_SHORT).show();
            }
            //开始触摸
            public void onStartTrackingTouch(SeekBar seekBar) {
                Toast.makeText(context, "开始触摸", Toast.LENGTH_SHORT).show();
            }
            //拖动过程中
            public void onProgressChanged(SeekBar seekBar, int progress,
                    boolean fromUser) {
                textView.setText(progress+"/"+seekBar.getMax());
            }
        });

    }
}

2.xml布局文件

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="5dp" >
<!-- 拖拽进度条 -->
    <SeekBar
        android:id="@+id/seekBarId"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <TextView
        android:id="@+id/textViewId"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/seekBarId"
        android:layout_alignParentRight="true"
        android:text="0%" />

</RelativeLayout>

3.效果显示图