View--progressBar

[android]代码库

1.Mainactivity.java

package com.example.acer.myapplication;
import android.os.Bundle;
import android.app.Activity;
import android.widget.ProgressBar;

public class MainActivity extends Activity {
    private int[] randData = new int[100];
    private int index = 0;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        final ProgressBar bar = (ProgressBar)findViewById(R.id.bar);


        new Thread() {
            @Override
            public void run() {
                super.run();
                while(index < 100) {
                    doWork();
                    bar.setProgress(index);
                }
            }
        }.start();
    }

    private int doWork() {
        randData[index++] = (int)(Math.random() * 100);
        //模拟一个比较耗时的操作
        try {
            Thread.sleep(100);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        return index;
    }
}



2.activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
    xmlns:tools="http://schemas.android.com/tools"  
    android:orientation="vertical"  
    android:layout_width="match_parent"  
    android:layout_height="match_parent" >  
    <TextView  
        android:layout_width="match_parent"  
        android:layout_height="wrap_content"  
        android:text="@string/hello_world"   
        />  
    <ProgressBar  
        android:id="@+id/bar"  
        android:layout_width="match_parent"  
        android:layout_height="wrap_content"  
        android:max="100"  
        style="@android:style/Widget.ProgressBar.Horizontal"  
        />  
</LinearLayout>