Android 获取网络信息

心已赠人 2022-12-18 11:57 187阅读 0赞

//onCreate()方法里面获取权限 ，注册广播
    		enforceAccessPermission();
            IntentFilter intentFilter = new IntentFilter("android.net.conn.CONNECTIVITY_CHANGE");
            registerReceiver(mNetworkBroadcastReceiver,intentFilter);

private NetworkBroadcastReceiver mNetworkBroadcastReceiver = new NetworkBroadcastReceiver();
        public class NetworkBroadcastReceiver extends BroadcastReceiver{ 
    
            @Override
            public void onReceive(Context context, Intent intent) { 
                Log.d(TAG, "onReceive: zhidong 来了");
                if(intent.getAction().equals(ConnectivityManager.CONNECTIVITY_ACTION)){ 
                    getNetworkType();
                }
            }
        }
    
        private void enforceAccessPermission(){ 
            this.enforceCallingOrSelfPermission(Manifest.permission.ACCESS_NETWORK_STATE,"ConnectivityService");
        }
    
        private void getNetworkType(){ 
            //获取手机所有连接管理对象
            ConnectivityManager manager =
                    (ConnectivityManager) this.getSystemService(Context.CONNECTIVITY_SERVICE);
            //获取NetworkInfo对象
            NetworkInfo networkInfo = manager.getActiveNetworkInfo();
            if(networkInfo == null){ 
                Log.d(TAG, "getNetworkType: zhidong network 为空");
                return;
            }
    
            int nType = networkInfo.getType();
            switch(nType){ 
                case ConnectivityManager.TYPE_WIFI:
                    Log.d(TAG, "getNetworkType: zhidong network ：WIFI");
                    WifiManager wifiManager = (WifiManager) this.getSystemService(Context.WIFI_SERVICE);
                    wifiManager.getConnectionInfo().getLinkSpeed();//获得带宽
                    break;
                case ConnectivityManager.TYPE_ETHERNET:
                    Log.d(TAG, "getNetworkType: zhidong network ：ETHERNET");
                    String speed = runShellCommand("cat /sys/class/net/eth0/speed").trim() + "Mbps";
                    break;
                default:
                    Log.d(TAG, "getNetworkType: zhidong network default:"+nType);
                    break;
            }
        }
    
        //执行shell命令
        public static String runShellCommand(String command) { 
            Runtime runtime;
            Process proc = null;
            StringBuffer stringBuffer = null;
            try { 
                runtime = Runtime.getRuntime();
                proc = runtime.exec(command);
                stringBuffer = new StringBuffer();
                if (proc.waitFor() != 0) { 
                    System.err.println("exit value = " + proc.exitValue());
                }
                BufferedReader in = new BufferedReader(new InputStreamReader(
                        proc.getInputStream()));
    
                String line = null;
                while ((line = in.readLine()) != null) { 
                    stringBuffer.append(line + " ");
                }
    
            } catch (Exception e) { 
                System.err.println(e);
            } finally { 
                try { 
                    proc.destroy();
                } catch (Exception e2) { 
                }
            }
            return stringBuffer.toString();
        }