android 用代码打开 gprs(流量开关) android 5.0 ROOT

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在安卓5.0之前打开gprs 通常都是通过反射调用 ConnectivityManager 的setMobileDataEnabled方法打开流量

  //检测GPRS是否打开private static boolean gprsIsOpenMethod(ConnectivityManager  mCM ,String methodName){Class cmClass       = mCM.getClass();Class[] argClasses  = null;Object[] argObject  = null;Boolean isOpen = false;try{Method method = cmClass.getMethod(methodName, argClasses);isOpen = (Boolean) method.invoke(mCM, argObject);} catch (Exception e){e.printStackTrace();}return isOpen;}//开启/关闭GPRSprivate  static void setGprsEnabled(ConnectivityManager  mCM , boolean isEnable){Class cmClass       = mCM.getClass();Class[] argClasses  = new Class[1];argClasses[0]       = boolean.class;try{Method method = cmClass.getMethod("setMobileDataEnabled", argClasses);method.invoke(mCM, isEnable);} catch (Exception e){e.printStackTrace();}}

android 5.0开始加强了流量的权限管理，想要开启流量需要root权限

 private final static String COMMAND_L_ON = "svc data enable\n ";private final static String COMMAND_L_OFF = "svc data disable\n ";private final static String COMMAND_SU = "su";public static void setGprsEnabled(boolean enable,Context context){String command;if(enable)command = COMMAND_L_ON;elsecommand = COMMAND_L_OFF;try{Process su = Runtime.getRuntime().exec(COMMAND_SU);DataOutputStream outputStream = new DataOutputStream(su.getOutputStream());outputStream.writeBytes(command);outputStream.flush();outputStream.writeBytes("exit\n");outputStream.flush();try {su.waitFor();} catch (Exception e) {e.printStackTrace();}outputStream.close();}catch(Exception e){e.printStackTrace();}}

如果应用有root权限的话可以通过这个方式开启gprs

 public static boolean gprsEnabled(Context context,boolean bEnable){if (Build.VERSION.SDK_INT>=21 ){setGprsEnabled(bEnable,context);}else {Object[] argObjects = null;ConnectivityManager mCM = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);setGprsEnabled(mCM, "setMobileDataEnabled", bEnable);}return bEnable;}