Android 下载一个文件以及打开这个apk文件

下载一个网络文件的函数如下

public static File downLoadFile(String httpUrl) {
            // TODO Auto-generated method stub
            final String fileName = "nq.apk";
            File tmpFile = new File("//sdcard");
            if (!tmpFile.exists()) {
                    tmpFile.mkdir();
            }
            final File file = new File("//sdcard//" + fileName);
            try {
                    URL url = new URL(httpUrl);
                    try {
                            HttpURLConnection conn = (HttpURLConnection) url
                                            .openConnection();
                            InputStream is = conn.getInputStream();
                            FileOutputStream fos = new FileOutputStream(file);
                            byte[] buf = new byte[256];
                            conn.connect();
                            double count = 0;
                            if (conn.getResponseCode() >= 400) {
//                                  Toast.makeText(DownFile.this, "连接超时", Toast.LENGTH_SHORT)
//                                                  .show();
                                Log.i("time","time exceed");
                            } else {
                                    while (count <= 100) {
                                            if (is != null) {
                                                    int numRead = is.read(buf);
                                                    if (numRead <= 0) {
                                                            break;
                                                    } else {
                                                            fos.write(buf, 0, numRead);
                                                    }
                                            } else {
                                                    break;
                                            }
                                    }
                            }
                            conn.disconnect();
                            fos.close();
                            is.close();
                    } catch (IOException e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                    }
            } catch (MalformedURLException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
            }
            return file;
    }

 

如果是一个apk文件，打开并且安装的函数为

private void openFile(File file) {
        // TODO Auto-generated method stub
        Log.e("OpenFile", file.getName());
        Intent intent = new Intent();
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        intent.setAction(android.content.Intent.ACTION_VIEW);
        intent.setDataAndType(Uri.fromFile(file),
                        "application/vnd.android.package-archive");
        startActivity(intent);
}

 

这样就可以实现一个apk文件的下载和安装，后续有时间给大家介绍下静默安装和卸载的实现

 

本文地址http://blog.csdn.net/Zengyangtech/archive/2011/03/15/6251377.aspx

转载请注明