Hello I have the JSON given below, how i can retrieve data by passing parameters into method given in (for android) : 
JSON:
{
  "transport": "POST",
  "envelope": "JSON-RPC-2.0",
  "contentType": "application\/json",
  "SMDVersion": "2.0",
  "target": "\/index.php",
  "services": {
    "search": {
      "envelope": "JSON-RPC-2.0",
      "transport": "POST",
      "parameters": [
        {
          "type": "array",
          "name": "criterias",
          "optional": false
        }
      ],
      "returns": "array"
    },
    "getDayConferences": {
      "envelope": "JSON-RPC-2.0",
      "transport": "POST",
      "parameters": [
        {
          "type": "integer",
          "name": "nb_day",
          "optional": false
        }
      ],
      "returns": "array"
    },
    "getParticipants": {
      "envelope": "JSON-RPC-2.0",
      "transport": "POST",
      "parameters": [
      ],
      "returns": "array"
    },
    "getAllForLocation": {
      "envelope": "JSON-RPC-2.0",
      "transport": "POST",
      "parameters": [
        {
          "type": "float",
          "name": "latitude",
          "optional": false
        },
        {
          "type": "float",
          "name": "longitude",
          "optional": false
        }
      ],
      "returns": "array"
    }
  },
  "methods": {
    "search": {
      "envelope": "JSON-RPC-2.0",
      "transport": "POST",
      "parameters": [
        {
          "type": "array",
          "name": "criterias",
          "optional": false
        }
      ],
      "returns": "array"
    },
    "getDayConferences": {
      "envelope": "JSON-RPC-2.0",
      "transport": "POST",
      "parameters": [
        {
          "type": "integer",
          "name": "nb_day",
          "optional": false
        }
      ],
      "returns": "array"
    },
    "getParticipants": {
      "envelope": "JSON-RPC-2.0",
      "transport": "POST",
      "parameters": [
      ],
      "returns": "array"
    },
    "getAllForLocation": {
      "envelope": "JSON-RPC-2.0",
      "transport": "POST",
      "parameters": [
        {
          "type": "float",
          "name": "latitude",
          "optional": false
        },
        {
          "type": "float",
          "name": "longitude",
          "optional": false
        }
      ],
      "returns": "array"
    }
  }
}
Thank you in advance for help..