httpurl下载

小咪咪 2022-12-17 07:20 195阅读 0赞

httpurl下载
    
    File descFile = new File(MainActivity.this.getCacheDir(), fileName);
                // Android 4.0 之后不能在主线程中请求HTTP请求
    
                if (downflag){
                    download(descFile);
    
                }
    
    
    
                new Thread(new Runnable(){
    
                    @Override
                    public void run() {
                        try {
                            HttpURLConnection conn = null;
                            trustAllHosts();
                            URL httpUrl = new URL(url);
                            HttpsURLConnection https = (HttpsURLConnection)httpUrl.openConnection();
                            if (httpUrl.getProtocol().toLowerCase().equals("https")) {
                                https.setHostnameVerifier(new HostnameVerifier() {
                                    public boolean verify(String hostname, SSLSession session) {
                                        return true;
                                    }
                                });
                                conn = https;
                            } else {
                                conn = (HttpURLConnection)httpUrl.openConnection();
                            }
    
                            conn.setRequestProperty("Cookie",cookieStr);
                            conn.setRequestProperty("Host","mail.ejianlong.com");
                            // 设置连接主机超时时间
                            conn.setConnectTimeout(5 * 1000);
                            //设置从主机读取数据超时
                            conn.setReadTimeout(5 * 1000);
                            // 设置是否使用缓存  默认是true
                            conn.setUseCaches(true);
                            // 设置为Post请求
                            conn.setRequestMethod("GET");
    //                        conn.connect();
                            // 判断请求是否成功
                            if (conn.getResponseCode() == 200) {
    
    
                                FileOutputStream fos = new FileOutputStream(descFile);;
                                byte[] buffer = new byte[1024];
                                int len;
                                InputStream inputStream = conn.getInputStream();
                                while ((len = inputStream.read(buffer)) != -1) {
                                    // 写到本地
                                    fos.write(buffer, 0, len);
                                }
                                Log.e("文件下载完成", "文件下载完成");
    //                            Intent handlerIntent = new Intent(Intent.ACTION_VIEW);
                                downflag = true;
    
                                handlerIntent.setDataAndType(uri, mimeType);
    //                            // 以下固定写法
    //                            final Intent intent = new Intent(Intent.ACTION_VIEW,
    //                                    uri);
    //                            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
    //                                    | Intent.FLAG_ACTIVITY_SINGLE_TOP);
    //                            startActivity(intent);
                                startActivity(handlerIntent);
                            } else {
                                Log.e("文件下载失败", "文件下载失败");
                            }
                            // 关闭连接
                            conn.disconnect();
                        } catch (Exception e) {
                            Log.e("文件下载失败", e.toString());
                        }
                    }
    
                    private  void trustAllHosts() {
                        final String TAG = "trustAllHosts";
                        // Create a trust manager that does not validate certificate chains
                        TrustManager[] trustAllCerts = new TrustManager[] { new X509TrustManager() {
                            public java.security.cert.X509Certificate[] getAcceptedIssuers() {
                                return new java.security.cert.X509Certificate[] {};
                            }
                            public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
                                Log.i(TAG, "checkClientTrusted");
                            }
                            public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
                                Log.i(TAG, "checkServerTrusted");
                            }
                        } };
                        // Install the all-trusting trust manager
                        try {
                            SSLContext sc = SSLContext.getInstance("TLS");
                            sc.init(null, trustAllCerts, new java.security.SecureRandom());
                            HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
                        } catch (Exception e) {
                            e.printStackTrace();
                        }
                    }
    
    
                    }).start();