ProgressDialog 加载中，请稍候...

[android]代码库

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 EX03_18 extends Activity {
	private Button mButton1;
	private TextView mTextView1;
	public ProgressDialog myDialog = null;

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

		mButton1 = (Button) findViewById(R.id.myButton1);
		mTextView1 = (TextView) findViewById(R.id.myTextView1);
		mButton1.setOnClickListener(myShowProgressBar);
	}

	Button.OnClickListener myShowProgressBar = new Button.OnClickListener() {
		public void onClick(View arg0) {
			final CharSequence strDialogTitle = getString(R.string.str_dialog_title);
			final CharSequence strDialogBody = getString(R.string.str_dialog_body);
			// 显示Progress对话框
			myDialog = ProgressDialog.show(EX03_18.this, strDialogTitle,
					strDialogBody, true);
			mTextView1.setText(strDialogBody);
			new Thread() {
				public void run() {
					try {
						/* 在这里写上要背景执行的程序片段 */
						/* 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 { // 卸除所建立的myDialog对象。
						myDialog.dismiss();
					}
				}
			}.start(); /* 开始执行线程 */
		}
		/* End: public void onClick(View arg0) */
	};
}

[代码运行效果截图]