Android程序:使用SeekBar实现滑动进度条功能

代码实现:

MainActivity ：

public class MainActivity extends Activity implements OnSeekBarChangeListener {
    private SeekBar seekBar;
    private TextView tv1;
    private TextView tv2;

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

        tv1=(TextView) findViewById(R.id.tv1);
        tv2=(TextView) findViewById(R.id.tv2);
        seekBar=(SeekBar) findViewById(R.id.seekbar);
        seekBar.setOnSeekBarChangeListener(this);
    }

    //数值改变调用
    @Override
    public void onProgressChanged(SeekBar seekBar, int progress,
            boolean fromUser) {
        tv1.setText("正在拖动");
        tv2.setText("当前进度:"+progress);
    }

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

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

Layout ：

<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.seekbardemo.MainActivity" >

    <SeekBar
        android:id="@+id/seekbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:max="100"
        android:progress="50" />

    <TextView
        android:id="@+id/tv2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/seekbar"
        android:layout_below="@+id/seekbar" />

    <TextView
        android:id="@+id/tv1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/tv2"
        android:layout_below="@+id/tv2" />

RelativeLayout>