进度条对话框：通过Handler实现

package com.lilin.progressdialog;

//声明包语句
import android.app.Activity;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class Main extends Activity {
	final int PROGRESS_DIALOG = 0; // 声明进度对话框id
	final int INCREASE = 0; // Handler消息类型
	ProgressDialog progressDialog;
	Handler myHandler; // Handler对象引用
	int max = 1000000;

	@Override
	public void onCreate(Bundle savedInstanceState) { // 重写onCreate方法
		super.onCreate(savedInstanceState);
		setTitle("进度条对话框");
		setContentView(R.layout.main);
		Button bok = (Button) this.findViewById(R.id.Button01);
		bok.setOnClickListener(new OnClickListener() {
			public void onClick(View v) {
				showDialog(PROGRESS_DIALOG); // 显示进度对话框
			}
		});
		myHandler = new Handler() { // 创建Handler对象
			public void handleMessage(Message msg) {// 处理传过的信息

				switch (msg.what) {
				case INCREASE:
					progressDialog.incrementProgressBy(msg.arg1);// 进度每次加1

					if (progressDialog.getProgress() == max) { // 判断是否结束进度
						Toast.makeText(Main.this, "下载完成！", 2000).show();
						progressDialog.dismiss(); // 如果进度条走完则关闭窗口
					} else {
						myHandler.post(runnable);// 将线程添加进消息队列
					}
					break;
				}
				super.handleMessage(msg);
			}
		};
	}

	@Override
	public Dialog onCreateDialog(int id) {// 重写onCreateDialog方法
		switch (id) { // 对id进行判断
		case PROGRESS_DIALOG: // 创建进度对话框
			progressDialog = new ProgressDialog(this);// 创建进度对话框
			progressDialog.setMax(max);// 设置最大值
			progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
			progressDialog.setTitle("正在同步......");// 设置标题
			progressDialog.setCancelable(false);// 设置进度对话框不能用回退按钮关闭
			break;
		}
		return progressDialog;
	}

	Runnable runnable = new Runnable() {
		int i = 0;

		public void run() {
			i = i + 10;
			Message message = myHandler.obtainMessage();
			message.what = INCREASE;
			message.arg1 = i;
			// Bundle bundle = new Bundle();
			// bundle.putString("key", "value");
			// message.setData(bundle);
			myHandler.sendMessage(message); // 发送Handler消息
			if (i == max) {
				myHandler.removeCallbacks(runnable);
				Log.i("andli", "执行完毕");
			}

		}

	};

	// 每次弹出对话框时被回调以动态更新对话框内容的方法
	@Override
	public void onPrepareDialog(int id, Dialog dialog) {
		super.onPrepareDialog(id, dialog);
		switch (id) {
		case PROGRESS_DIALOG:
			progressDialog.incrementProgressBy(-progressDialog.getProgress());// 对话框进度清零

			myHandler.post(runnable);// 将线程添加进消息队列

			break;
		}
	}
}