android progress 进度条实例 附源码

【实例简介】android进度条实例
【实例截图】

【核心代码】

package com.test;

import android.app.Activity;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class ProgressActivity extends Activity {

	private Button button1;
	private TextView textView1;
	public ProgressDialog dialog = null;

	public void onCreate(Bundle savedInstanceState) {
		
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

		button1 = (Button) findViewById(R.id.myButton1);
		textView1 = (TextView) findViewById(R.id.myTextView1);
		button1.setOnClickListener(myShowProgressBar);
	}

	Button.OnClickListener myShowProgressBar = new Button.OnClickListener() {
		
		public void onClick(View v) {
			
			final CharSequence dialogTitle = getString(R.string.str_dialog_title);
			final CharSequence dialogBody = getString(R.string.str_dialog_body);

			// 显示Progress对话框
			dialog = ProgressDialog.show(ProgressActivity.this, dialogTitle,
					dialogBody, true);

			textView1.setText(dialogBody);

			new Thread() {
				public void run() {
					try {
						/* 在这里写上要背景运行的程序片段 */
						/* 为了明显看见效果，以暂停3秒作为示范 */
						sleep(3000);
					} 
					catch (Exception e) {
						e.printStackTrace();
					} 
					finally {
						// 卸载所创建的dialog对象。
						dialog.dismiss();
					}
				}
			}.start();
		}
	};
}