編輯:關於Android編程
一、android下創建文件夾
File sd=Environment.getExternalStorageDirectory(); String path=sd.getPath()+"/notes"; File file=new File(path); if(!file.exists()) file.mkdir();
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定義文件後,用.write方法寫入內容,就可以創建對應文件了。
三、android安裝其他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);
一、Socket通信簡介Android與服務器的通信方式主要有兩種,一是Http通信,一是Socket通信。兩者的最大差異在於,http連接使用的是“請求&m
什麼是SVG(Scalable Vector Graphics)SVG一種用於描述圖像的標記語言。類似HTML。SVG嚴格遵從XML語法,並用文本格式的描述性語言來描述圖
說到圖像處理,第一件事就是要從手機相冊選擇圖片,然後才是處理。其實,用代碼實現從手機相冊選擇一張圖片其實非常簡單:添加一個Button,id設為btnOpen;對該But
①下載Git工具,配置到Android studio中http://git-scm.com/downloads------------------------------