小程序源码 学习相关 progress前台运算.rar

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(); } }; }