一、android下创建目录
File sd=Environment.getExternalStorageDirectory(); String path=sd.getPath()+"/notes"; File file=new File(path); if(!file.exists()) file.mkdir();
二、android下创建文件
HttpClient httpClient = new DefaultHttpClient(); HttpGet httpGet= new HttpGet("http://img3.3lian.com/2006/016/09/031.jpg"); HttpResponse httpResponse = httpClient.execute(httpGet); if(httpResponse.getStatusLine().getStatusCode() == 200){ total_length = httpResponse.getEntity().getContentLength(); is = httpResponse.getEntity().getContent() ; File file = new File(Environment.getExternalStorageDirectory(), "aupdata.jpg"); fos = new FileOutputStream(file); bis = new BufferedInputStream(is); byte[] buffer = new byte[1024]; byte [] result_two = new byte [(int) total_length]; int len = 0; int total=0; while((len = bis.read(buffer)) > -1){ System.arraycopy(buffer, 0, result_two, total, len); fos.write(buffer, 0, len); total = total + len ; } }FileOutputStream定义文件后。用.write方法写入内容,就能够创建相应文件了。
三、android安装其它apk
Intent intent = new Intent(); intent.setAction(Intent.ACTION_VIEW); File install_file = new File(Environment.getExternalStorageDirectory() , "MyWeb.apk"); intent.setDataAndType(Uri.fromFile(install_file), "application/vnd.android.package-archive"); startActivity(intent);