package com.shao.android;
import java.util.Random;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class Main extends Activity implements OnClickListener{
/** Called when the activity is first created. */
private static final int MAX_Progress=100;
private ProgressDialog progressDialog;
private Handler progressHandler;
private int progress;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button button1=(Button)findViewById(R.id.btn1);
Button button2=(Button)findViewById(R.id.btn2);
button1.setOnClickListener(this);
button2.setOnClickListener(this);
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch(v.getId())
{
case R.id.btn1:
showProgressDialog(ProgressDialog.STYLE_HORIZONTAL);
break;
case R.id.btn2:
showProgressDialog(ProgressDialog.STYLE_SPINNER);
break;
}
}
// 顯示進度對話方塊,style表示進度對話方塊的風格
private void showProgressDialog(int style)
{
progressDialog=new ProgressDialog(this);
progressDialog.setIcon(R.drawable.wait);
progressDialog.setTitle("正在處理資料...");
progressDialog.setMessage("請稍後...");
// 設定進度對話方塊的風格
progressDialog.setProgressStyle(style);
// 設定進度對話方塊的進度最大值
progressDialog.setMax(MAX_Progress);
// 設定進度對話方塊的【暫停】按鈕
progressDialog.setButton("暫停", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int whichButton) {
// TODO Auto-generated method stub
// 通過刪除訊息代碼的方式停止定時器的執行
progressHandler.removeMessages(1);
// 恢複進度初始值
progress=0;
progressDialog.setProgress(0);
}
});
progressDialog.show();
progressHandler=new Handler(){
@Override
public void handleMessage(Message msg) {
// TODO Auto-generated method stub
super.handleMessage(msg);
// if (progressDialog.getProgress() >= MAX_PROGRESS)
if(progress>=MAX_Progress)
{
// 進度達到最大值,關閉對話方塊
progress=0;
progressDialog.dismiss();
}
else {
progress++;
// 將進度遞增1
progressDialog.incrementProgressBy(1);
// 隨機設定下一次遞增進度(調用handleMessage方法)的時間
progressHandler.sendEmptyMessageDelayed(1,50+ new Random().nextInt(500));
}
}
};
// 設定進度初始值
progress=(progress>0)?progress:0;
progressDialog.setProgress(progress);
progressHandler.sendEmptyMessage(1);
}
}