android 退出程序

1：

android.os.Process.killProcess(android.os.Process.myPid());
finish();
System.exit(0);

2：
Intent intent=new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_HOME);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
System.exit(0);

PS:使用第二种方式退出会出现本来下载到sdcard的html文件自动删除，没有搞清楚原因，

知道的同学麻烦告诉我一下。

下载html的方法：

View Code

public static Boolean downHtml(String pageURL, String filePath) {        StringBuilder pageHTML = new StringBuilder();        try {            URL url = new URL(pageURL);            HttpURLConnection connection = (HttpURLConnection) url.openConnection();            // connection.setRequestProperty("User-Agent", "MSIE 7.0");            BufferedReader br = new BufferedReader(new InputStreamReader(connection.getInputStream(), "utf-8"));            String line = null;            while ((line = br.readLine()) != null) {                pageHTML.append(line);                pageHTML.append("\r\n");            }            connection.disconnect();        } catch (Exception e) {            e.printStackTrace();        }        return FileUtils.writeStringToFile(pageHTML.toString(), filePath) ;     }

View Code

    public static Boolean writeStringToFile(String strInput, String pFilePaht) {        OutputStream out = null;        File file = new File(getRootPath() + pFilePaht);        try {            file.deleteOnExit();            file = createFile(pFilePaht);            out = new FileOutputStream(file);            byte[] bytes = strInput.getBytes();            out.write(bytes);            out.flush();            return true;        } catch (FileNotFoundException e) {            e.printStackTrace();            return false;        } catch (IOException e) {            e.printStackTrace();            return false;        } finally {            file = null;            try {                if (out != null)                    out.close();            } catch (IOException e) {                e.printStackTrace();            }        }    }

http://blog.csdn.net/victoryckl/article/details/6705388

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