android中设置进度条读取

效果图

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        final ProgressBar pb = (ProgressBar) findViewById(R.id.progressBar4);
        final TextView tv = (TextView) findViewById(R.id.tv);
        pb.setMax(200);
        pb.setProgress(0);
        new Thread() {
            public void run() {
                // 模拟耗时任务
                int index = 0;
                while (index++ < 200) {
                    try {
                        Thread.sleep((int) (Math.random() * 200));
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    // 修改值
                    // 做了UI的处理，所以直接可以再子线程中修改UI
                    pb.setProgress(index);
                    // 需要使用UI线程
                    runOnUiThread(new Runnable() {

                        @Override
                        public void run() {
                            tv.setText(pb.getProgress() + "/" + pb.getMax());
                        }
                    });
                }

            };
        }.start();
    }

}

<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"
    tools:context="com.xykj.id05_10_10.MainActivity" >

    <ProgressBar
        android:id="@+id/pb1"
        style="?android:attr/progressBarStyleHorizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true" 
        android:layout_margin="10dp"/>

    <TextView
        android:id="@+id/tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignRight="@id/pb1"
        android:layout_below="@id/pb1"
        android:padding="10dp"
        android:text="0/200" />

RelativeLayout>