Android程序:使用SeekBar实现滑动进度条功能

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这里写图片描述

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>

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