Android进度条学习二

package tw.android;import java.util.Calendar;import android.app.Activity;import android.app.ProgressDialog;import android.os.Bundle;import android.os.Handler;import android.view.View;import android.widget.Button;public class Main extends Activity {    private Button mBtnProgDlg;    private Handler mHandler = new Handler();    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        setupViewComponent();    }        private void setupViewComponent() {        mBtnProgDlg = (Button)findViewById(R.id.btnProgDlg);        mBtnProgDlg.setOnClickListener(btnProgDlgOnClkLis);    }    private Button.OnClickListener btnProgDlgOnClkLis = new Button.OnClickListener() {        public void onClick(View v) {            final ProgressDialog progDlg = new ProgressDialog(Main.this);            progDlg.setTitle("进度条");            progDlg.setMessage("进度...");            progDlg.setIcon(android.R.drawable.ic_dialog_info);            progDlg.setCancelable(false);            progDlg.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);            progDlg.setMax(100);            progDlg.show();                        new Thread(new Runnable() {                 public void run() {                       Calendar begin = Calendar.getInstance();                        do {                            Calendar now = Calendar.getInstance();                            final int iDiffSec = 60 * (now.get(Calendar.MINUTE) - begin.get(Calendar.MINUTE)) +                                            now.get(Calendar.SECOND) - begin.get(Calendar.SECOND);                                            if (iDiffSec * 2 > 100) {                                mHandler.post(new Runnable() {                                    public void run() {                                        progDlg.setProgress(100);                                    }                                });                                                                break;                            }                                                        mHandler.post(new Runnable() {                                public void run() {                                    progDlg.setProgress(iDiffSec * 2);                                }                            });                                                        if (iDiffSec * 4 < 100)                                mHandler.post(new Runnable() {                                    public void run() {                                        progDlg.setSecondaryProgress(iDiffSec * 4);                                    }                                });                            else                                mHandler.post(new Runnable() {                                    public void run() {                                        progDlg.setSecondaryProgress(100);                                    }                                });                        } while (true);                                                progDlg.cancel();                   }            }).start();        }    };}

以上是ProgressDialog代码，ProgressDialog 是需要的时候才显示，工作完后就消失。

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