how to pass parameter from one activity to php side and received by another activity? in php side, i will do query, so my query depends on passed parameter from one activity and another activity will show the result of that query. thanks for your helps.
1> how to pass parameter android app to php site. 1> create one json parser class JSONParser.java
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// constructor
public JSONParser() {
}
public JSONObject getJSONFromUrl(String url, List<NameValuePair> params) {
// Making HTTP request
try {
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
String paramString = URLEncodedUtils.format(params, "utf-8");
url += "?" + paramString;
HttpGet httpGet = new HttpGet(url);
HttpResponse httpResponse = httpClient.execute(httpGet);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
json = sb.toString();
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
// try parse the string to a JSON object
try {
jObj = new JSONObject(json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
// return JSON String
return jObj;
}
} 2> create one user function class for pass or receiver parameter on php UserFunctions.java . in this class one function for get data from php site and another for pass android app to php
public class UserFunctions {
private JSONParser jsonParser;
private static String api_URL = "http://10.0.2.2/carcab_api/";
private static String login_tag = "log_in";
private static String get_user_detail_tag = "userdetail";
// constructor
public UserFunctions() {
jsonParser = new JSONParser();
}
/**
* function make Login Request
*
* @param email
* @param password
* */
public JSONObject loginUser(String usr_nm, String password) {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("tag", login_tag));
params.add(new BasicNameValuePair("usr_nm", usr_nm));
params.add(new BasicNameValuePair("password", password));
JSONObject json = jsonParser.getJSONFromUrl(api_URL, params);
// Log.e("JSON", json.toString());
return json;
}
/**
* function make get User Detail Request
*
* @param email
* @param password
* */
public JSONObject get_user_detail(String user_id) {
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("tag", get_user_detail_tag));
params.add(new BasicNameValuePair("user_id", user_id));
JSONObject json1 = jsonParser.getJSONFromUrl(api_URL, params);
System.out.println(params);
Log.e("JSON1", json1.toString());
return json1;
}
}
3> i am pass parameter from android to php on click of login button. loginActivity.java
public class LoginActivity extends Activity {
Button btnLogin;
EditText inputu_nm;
EditText inputPassword;
TextView loginErrorMsg;
UserFunctions userFunction;
JSONObject json;
// JSON Response node names
private static String KEY_SUCCESS = "success";
private static String KEY_UID = "user_id";
private static String KEY_NAME = "user_name";
private static String KEY_UNM = "user_nm";
private static String KEY_OID = "off_id";
private ProgressDialog progressDialog;
private static String KEY_CREATED_AT = "created_at";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.login);
// Importing all assets like buttons, text fields
inputu_nm = (EditText) findViewById(R.id.u_nm);
inputPassword = (EditText) findViewById(R.id.pass);
btnLogin = (Button) findViewById(R.id.btnlogin);
loginErrorMsg = (TextView) findViewById(R.id.login_error);
// Login button Click Event
btnLogin.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
String u_nm = inputu_nm.getText().toString();
String password = inputPassword.getText().toString();
UserFunctions userFunction = new UserFunctions();
//pass user username and password to android app to php
JSONObject json = userFunction.loginUser(u_nm, password);
// if json responce is success then user go to next home activity
try {
if (json.getString(KEY_SUCCESS) != null) {
loginErrorMsg.setText("");
String res = json.getString(KEY_SUCCESS);
if (Integer.parseInt(res) == 1) {
Intent dashboard = new Intent(getApplicationContext(), HomeActivity.class);
startActivity(dashboard);
} else {
// Error in login
loginErrorMsg.setText("Incorrect Username Or Password");
inputu_nm.setText("");
inputPassword.setText("");
}
}
} catch (JSONException e) {
e.printStackTrace();
}
}
});
}
}
4> now i am get user detail from php to another activity.when user detail activity launch then get all detail of user.userdetail.java
public class userdetailActivity extends Activity {
// JSON Response node names
private static String KEY_SUCCESS = "success";
private static String KEY_ERROR = "error";
private static String KEY_ERROR_MSG = "error_msg";
private static String KEY_SUCCESS_MSG = "success_msg";
JSONObject json_user;
UserFunctions userFunctions;
DatabaseHandler DBHandler;
String user_name = "";
String user_password = "";
String user_address = "";
String user_mobile = "";
String user_id;
TextView username, password, address, mobile;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.userdetail);
userFunctions = new UserFunctions();
username = (TextView) findViewById(R.id.username);
password = (TextView) findViewById(R.id.password);
address = (TextView) findViewById(R.id.address);
mobile = (TextView) findViewById(R.id.mobile);
// i am pass static value of user id now
user_id = "1001";
// i am pass user id and get user detail on my activity from php
refresh_screen(user_id);
}
private void refresh_screen(String user_id) {
JSONObject json = userFunctions.get_user_detail(user_id);
jsonact = json;
// check for positive response
try {
if (json.getString(KEY_SUCCESS) != null) {
String res = json.getString(KEY_SUCCESS);
if (Integer.parseInt(res) == 1) {
json_user = json.getJSONObject("user");
user_name = json_user.getString("username");
user_password = json_user.getString("password");
user_address = json_user.getString("address");
user_mobile = json_user.getString("mobile");
username.setText(user_name);
password.setText(user_password);
address.setText(user_address);
mobile.setText(user_mobile);
} else if (Integer.parseInt(res) == 0) {
Toast.makeText(getApplicationContext(), "No detail Found",
Toast.LENGTH_LONG).show();
}
} else if (json.getString(KEY_ERROR) != null) {
String res = json.getString(KEY_ERROR);
if (Integer.parseInt(res) == 1) {
Toast.makeText(getApplicationContext(), "No detail Found",
Toast.LENGTH_LONG).show();
}
}
} catch (JSONException e) {
e.printStackTrace();
Toast.makeText(getApplicationContext(), "No detail Found",
Toast.LENGTH_LONG).show();
}
}
}
来源：https://stackoverflow.com/questions/13042190/android-pass-and-receive-parameter-from-php