Android进度条+Runnable的配合显示

    正好看到进度条章节，就顺便配合下“线程队列”来试试效果啥的，也行！程序有毛病的，长按一次效果行，之后不能长按了，否则线程会一直跑，嘿嘿！
    布局文件: acitivity_ui.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android=""
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <ProgressBar
        android:id="@+id/progress1"
        style="?android:attr/progressBarStyleHorizontal"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:max="100"
        android:progress="0"
        android:progressDrawable="@drawable/back_color" />

    <Button
        android:id="@+id/button_progress1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="显示进度条" />

</LinearLayout>

    进度体文件: back_color.xml

<?xml version="1.0" encoding="UTF-8"?>
<layer-list xmlns:android="" >

    <!-- 设置背景色（黑色） -->

    <item android:id="@android:id/background">
        <shape>
            <corners android:radius="30dip" />

            <gradient
                android:endColor="#000000"
                android:startColor="#000000" />
        </shape>
    </item>

    <!-- 设置进度条颜色（白色） -->

    <item android:id="@android:id/progress">
        <clip>
            <shape>
                <corners android:radius="30dip" />

                <gradient
                    android:endColor="#0fffff"
                    android:startColor="#0fffff" />
            </shape>
        </clip>
    </item>

</layer-list>

    Activity源代码:

package com.example.control;

import android.os.Bundle;
import android.os.Handler;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.ProgressBar;

public class Ui extends Activity {
    private Button btn_pro1;
    private ProgressBar progress1;
    private Handler handler;
    private Runnable runnable;
    private int counter = 0;

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

        progress1 = (ProgressBar)findViewById(R.id.progress1);
        btn_pro1=(Button)findViewById(R.id.button_progress1);
        btn_pro1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                setProgressBarIndeterminateVisibility(true);
                progress1.incrementProgressBy(1);
                counter += 1;
            }
        });

        ///< 创建队列
        handler = new Handler();
        ///< 创建runnable对象，类似创建线程
        runnable = new Runnable () {
            public void run () {
                progress1.incrementProgressBy(1);
                counter += 1;
                if (30 == counter)
                {
                    handler.removeCallbacks(this);         ///< 从线程队列中删除
                    return;
                }
                handler.postDelayed(this, 500);         ///< 再次添加到线程队列
            }
        };

        btn_pro1.setOnLongClickListener(new View.OnLongClickListener() {

            @Override
            public boolean onLongClick(View v) {
                // TODO Auto-generated method stub
                handler.postDelayed(runnable, 500);     ///< 延时一定时间后向线程中添加队列
                return false;
            }
        });
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.ui, menu);
        return true;
    }

}

    样子: