Androidbeginnerpoint

This artical described how to used JSON in android. In this example we implement Registration an Login via JSON.explain below...

Step 1:

first,you have add manifest permission.

<uses-permission android:name="android.permission.INTERNET" />

Step 2:

create the Registratio and Login UserInteface (UI) field inside res/layout/login and registration xml class.

registration.xml

..................................................................................................................................................

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:gravity="center"

android:orientation="vertical"

tools:ignore="ScrollViewSize" >

<ScrollView

android:id="@+id/scrollView1"

android:layout_width="match_parent"

android:layout_height="wrap_content" >

<LinearLayout

android:layout_width="match_parent"

android:layout_height="match_parent"

android:layout_margin="3dp"

android:orientation="vertical"

android:paddingBottom="10dp"

android:paddingTop="10dp" >

<LinearLayout

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_margin="5dp"

android:orientation="vertical"

android:padding="5dp" >

<EditText

android:id="@+id/editText_name"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_margin="4dp"

android:ems="10"

android:hint="@string/edit_name"

android:inputType="textPersonName"

android:textColorHint="@color/hint_edittextcolor"

android:textSize="14sp" >

</EditText>

<EditText

android:id="@+id/editText_mobile"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_margin="4dp"

android:ems="10"

android:hint="@string/edit_mobile"

android:inputType="number"

android:textColorHint="@color/hint_edittextcolor"

android:textSize="14sp" />

<EditText

android:id="@+id/editText_email"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_margin="4dp"

android:ems="10"

android:hint="@string/edit_email"

android:inputType="textEmailAddress"

android:textColorHint="@color/hint_edittextcolor"

android:textSize="14sp" />

<EditText

android:id="@+id/editText_password"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_margin="4dp"

android:ems="10"

android:hint="@string/edit_pass"

android:inputType="textPassword"

android:textColorHint="@color/hint_edittextcolor"

android:textSize="14sp" />

<EditText

android:id="@+id/editText_cofPassword"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_margin="4dp"

android:ems="10"

android:hint="@string/edit_confpass"

android:inputType="textPassword"

android:textColorHint="@color/hint_edittextcolor"

android:textSize="14sp" />

</LinearLayout>

<Button

android:id="@+id/btn_signUp"

android:layout_width="fill_parent"

android:layout_height="47dp"

android:layout_marginBottom="7dp"

android:layout_marginLeft="7dp"

android:layout_marginRight="7dp"

android:layout_marginTop="30dp"

android:text="@string/btn_submit" />

</LinearLayout>

</ScrollView>

</LinearLayout>

login.xml

.......................................................................................................................................................

<?xml version="1.0" encoding="utf-8"?>

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"

android:id="@+id/scrollView1"

android:layout_width="match_parent"

android:layout_height="wrap_content" >

<LinearLayout

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:gravity="center"

android:orientation="vertical" >

<LinearLayout

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_margin="7dip"

android:orientation="vertical" >

<EditText

android:id="@+id/email"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_margin="4dp"

android:ems="10"

android:hint="@string/edit_email"

android:inputType="textEmailAddress"

android:textColorHint="@color/hint_edittextcolor"

android:textSize="14sp" />

<EditText

android:id="@+id/password"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_marginLeft="4dip"

android:layout_marginRight="4dip"

android:layout_marginTop="8dip"

android:ems="10"

android:hint="@string/edit_pass"

android:inputType="textPassword"

android:textColorHint="@color/hint_edittextcolor"

android:textSize="14sp" />

<Button

android:id="@+id/btn_signUp"

android:layout_width="fill_parent"

android:layout_height="47dp"

android:layout_marginLeft="7dp"

android:layout_marginRight="7dp"

android:layout_marginTop="40dp"

android:text="@string/btn_login" />

</LinearLayout>

<TableLayout

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_margin="5dip"

android:stretchColumns="2" >

<TableRow

android:id="@+id/tableRow1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_marginLeft="8dip"

android:layout_marginRight="8dip" >

<TextView

android:id="@+id/textView1"

android:layout_width="wrap_content"

android:layout_height="50dip"

android:layout_weight="1"

android:gravity="center"

android:text="@string/dolnt_Account" />

<TextView

android:id="@+id/textView_registration"

android:layout_width="wrap_content"

android:layout_height="50dip"

android:layout_gravity="right"

android:layout_marginRight="12dp"

android:gravity="right|center"

android:paddingLeft="10dip"

android:paddingRight="10dip"

android:text="@string/btn_submit"

android:textColor="@color/yellow"

android:textSize="20sp"

android:textStyle="bold|italic" />

</TableRow>

</TableLayout>

</LinearLayout>

</ScrollView>

Step 3:

create rest JSON Api class inside Src/RestAPI .java

package com.example.androidbeginnerpoint;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.Map.Entry;

import org.apache.http.HttpResponse;

import org.apache.http.client.HttpClient;

import org.apache.http.client.methods.HttpPost;

import org.apache.http.entity.StringEntity;

import org.apache.http.impl.client.DefaultHttpClient;

import org.json.JSONObject;

import android.content.Context;

import android.util.Log;

@SuppressWarnings("deprecation")

public class RestAPI {

String apiUrl;

Context context;

ArrayList<HashMap<String, String>> ParameterList = new ArrayList<HashMap<String, String>>();

public String getApiUrl() {

return apiUrl;

}

public void setApiUrl(String apiUrl) {

this.apiUrl = apiUrl;

}

public String ResponseApi() {

InputStream inputStream = null;

String result = "";

JSONObject jsonObject = new JSONObject();

try {

for (HashMap<String, String> map : ParameterList)

for (Entry<String, String> mapEntry : map.entrySet()) {

jsonObject.accumulate(mapEntry.getKey(),mapEntry.getValue());

}

HttpClient httpclient = new DefaultHttpClient();

HttpPost httpPost = new HttpPost(apiUrl);

String json = "";

json = jsonObject.toString();

StringEntity se = new StringEntity(json);

httpPost.setEntity(se);

httpPost.setHeader("Accept", "application/json");

httpPost.setHeader("Content-type", "application/json");

HttpResponse httpResponse = httpclient.execute(httpPost);

inputStream = httpResponse.getEntity().getContent();

if (inputStream != null)

result = convertInputStreamToString(inputStream);

else

result = "Did not work!";

} catch (Exception e) {

Log.d("InputStream", e.getLocalizedMessage());

}

return result;

}

public ArrayList<HashMap<String, String>> getParameterList() {

return ParameterList;

}

public void setParameterList(ArrayList<HashMap<String, String>> parameterList) {

ParameterList = parameterList;

}

private static String convertInputStreamToString(InputStream inputStream)

throws IOException {

BufferedReader bufferedReader = new BufferedReader(

new InputStreamReader(inputStream));

String line = "";

String result = "";

while ((line = bufferedReader.readLine()) != null)

result += line;

inputStream.close();

return result;

}

Step 4:

create Resgistration.java class inside src folder.

package com.example.androidbeginnerpoint;

import java.util.ArrayList;

import java.util.HashMap;

import org.json.JSONArray;

import org.json.JSONException;

import org.json.JSONObject;

import android.app.Activity;

import android.app.ProgressDialog;

import android.content.Context;

import android.content.Intent;

import android.content.SharedPreferences;

import android.content.SharedPreferences.Editor;

import android.os.AsyncTask;

import android.os.Bundle;

import android.util.Log;

import android.view.View;

import android.view.View.OnFocusChangeListener;

import android.widget.Button;

import android.widget.EditText;

import android.widget.Toast;

import com.Webnetware.Sqlitedatabase.DatabaseAdapter;

import com.Webnetware.adapter.ConnectionDetector;

import com.Webnetware.adapter.Listview_Utility;

import com.Webnetware.resApi.RestAPI;

public class Registrations extends Activity implements OnFocusChangeListener,

android.view.View.OnClickListener {

EditText edit_name, edit_mobile, edit_email,editText_cofPassword,editText_password;

String string_name, string_mobile, string_email,string_password ;

String customerId="";

Button btn_signUp;

ProgressDialog progressdialog;

public static final String Pssword = "PsswordKey";

public static final String Email = "emailKey";

// get the rest api class

RestAPI obj_restapi = new RestAPI();

//created all Json parameter store in array.you have to check json

ArrayList<HashMap<String, String>> ParameterList = new ArrayList<HashMap<String, String>>();

HashMap<String, String> map = new HashMap<String, String>();

@Override

protected void onCreate(Bundle savedInstanceState) {

// TODO Auto-generated method stub

super.onCreate(savedInstanceState);

setContentView(R.layout.registration_form);

edit_name = (EditText) findViewById(R.id.editText_name);

edit_mobile = (EditText) findViewById(R.id.editText_mobile);

edit_email = (EditText) findViewById(R.id.editText_email);

editText_password = (EditText) findViewById(R.id.editText_password);

editText_cofPassword = (EditText) findViewById(R.id.editText_cofPassword);

btn_signUp = (Button) findViewById(R.id.btn_signUp);

btn_signUp.setOnClickListener(this);

edit_name.setOnFocusChangeListener(this);

edit_mobile.setOnFocusChangeListener(this);

edit_email.setOnFocusChangeListener(this);

editText_password.setOnFocusChangeListener(this);

editText_cofPassword.setOnFocusChangeListener(this);

}

@Override

public void onFocusChange(View v, boolean hasFocus) {

switch (v.getId()) {

case R.id.editText_name:

edit_name.setError(null);

break;

case R.id.editText_mobile:

edit_mobile.setError(null);

break;

case R.id.editText_email:

edit_email.setError(null);

case R.id.editText_password:

edit_mobile.setError(null);

break;

case R.id.editText_cofPassword:

edit_email.setError(null);

default:

break;

}

@Override

public void onClick(View v) {

// editText validation

if (edit_name.getText().toString().equals("")) {

edit_name.setError("Enter Name");

edit_name.requestFocus();

} else if (editText_password.getText().toString().equals("")) {

editText_password.setError("Enter Email Address");

editText_password.requestFocus();

} else if (editText_cofPassword.getText().toString().equals("")) {

editText_cofPassword.setError("Enter Email Address");

editText_cofPassword.requestFocus();

}else if (!editText_cofPassword.getText().toString().equals(editText_password.getText().toString())) {

utils.AlertDialogBox1(Registrations.this);

} else if (edit_email.getText().toString().equals("")) {

edit_email.setError("Enter Email Address");

edit_email.requestFocus();

}

else if (!edit_email.getText().toString()

.matches("^[_A-Za-z0-9-\\+]+(\\.[_A-Za-z0-9-]+)*@"

+ "[A-Za-z0-9-]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,})$")) {

edit_email.setError("Enter valid Email address");

edit_email.requestFocus();

} else if (edit_mobile.getText().toString().equals("")) {

edit_mobile.setError("Enter Mobile Number");

edit_mobile.requestFocus();

} else if (edit_mobile.getText().toString().length() < 10

|| edit_mobile.getText().toString().length() > 10) {

edit_mobile.setError("Enter 10 Digt Number");

edit_mobile.requestFocus();

}

else {

string_name = edit_name.getText().toString();

string_mobile = edit_mobile.getText().toString();

string_email = edit_email.getText().toString();

string_password = editText_password.getText().toString();

// put the all editText String in map array

map.put("Name", string_name);

map.put("EmailID", string_email);

map.put("Password", string_password);

map.put("Mobile1", string_mobile);

ParameterList.add(map);

new HttpAsyncTask().execute();

}

private class HttpAsyncTask extends AsyncTask<String, Void, String> {

@Override

protected void onPreExecute() {

super.onPreExecute();

progressdialog = new ProgressDialog(Registrations.this);

progressdialog.setMessage("Please Wait...");

progressdialog.show();

progressdialog.setCancelable(false);

progressdialog.setCanceledOnTouchOutside(false);

}

@Override

protected String doInBackground(String... cname) {

try {

// set the URL via rest api object

obj_restapi.setApiUrl("http://www.Register.com/apis/Registration.ashx");

// set the parameter array

ob j_restapi.setParameterList(ParameterList);

} catch (Exception e) {

Log.d("Exception", e.toString());

}

return obj_restapi.ResponseApi()

}

@Override

protected void onPostExecute(String result) {

JSONObject json2;

String value = "True";

try {

// json object

json2 = new JSONObject(result);

// get json response

JSONArray Profiles = json2.getJSONArray("Profiles");

for (int i = 0; i < Profiles.length(); i++) {

JSONObject e = Profiles.getJSONObject(i);

customerId = e.getString("ID");

}

if (value.equals(json2.getString("Message"))) { Toast.makeText(getApplication(), "Your Well Come" ,Toast.LENGTH_LONG).show(); Intent intent = new Intent(Registrations.this,LoginActivity.class);

startActivity(intent);

overridePendingTransition(R.anim.slide_in_right,R.anim.stay); finish();

if (progressdialog != null) {

progressdialog.dismiss();

}

} else {

Toast.makeText(getApplication(), "Please Try Again...", Toast.LENGTH_LONG).show();

if (progressdialog != null) {

progressdialog.dismiss();

}

} catch (JSONException e) {

e.printStackTrace();

}

Step 5:

create Login.java class inside src folder.

package com.example.androidbeginnerpoint;

import java.util.ArrayList;

import java.util.HashMap;

import org.json.JSONArray;

import org.json.JSONException;

import org.json.JSONObject;

import com.Webnetware.Sqlitedatabase.DatabaseAdapter;

import com.Webnetware.adapter.ConnectionDetector;

import com.Webnetware.adapter.Listview_Utility;

import com.Webnetware.resApi.RestAPI;

import android.annotation.SuppressLint;

import android.app.ActionBar;

import android.app.Activity;

import android.app.ProgressDialog;

import android.content.Context;

import android.content.Intent;

import android.content.SharedPreferences;

import android.os.AsyncTask;

import android.os.Bundle;

import android.util.Log;

import android.view.MenuItem;

import android.view.View;

import android.view.View.OnFocusChangeListener;

import android.widget.Button;

import android.widget.EditText;

import android.widget.TextView;

import android.widget.Toast;

public class LoginActivity extends Activity implements

android.view.View.OnClickListener {

TextView sginUp_btn;

EditText edit_email, editText_password;

String string_email, string_password;

Button btn_signIn;

ProgressDialog progressdialog;

RestAPI obj_restapi = new RestAPI();

ArrayList<HashMap<String, String>> ParameterList = new ArrayList<HashMap<String, String>>();

HashMap<String, String> map = new HashMap<String, String>();

public static final String Pssword = "PsswordKey";

public static final String Email = "emailKey";

@SuppressLint("NewApi")

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

getActionBar().setTitle(" LogIn");

ActionBar actionBar = getActionBar();

actionBar.setDisplayHomeAsUpEnabled(true);

getActionBar().setHomeButtonEnabled(true);

setContentView(R.layout.login_actvity);

sginUp_btn = (TextView) findViewById(R.id.textView_registration);

edit_email = (EditText) findViewById(R.id.email);

editText_password = (EditText) findViewById(R.id.password);

btn_signIn = (Button) findViewById(R.id.btn_signUp);

btn_signIn.setOnClickListener(this);

sginUp_btn.setOnClickListener(this);

}

private class HttpAsyncTask extends AsyncTask<String, Void, String> {

@Override

protected void onPreExecute() {

super.onPreExecute();

progressdialog = new ProgressDialog(LoginActivity.this);

progressdialog.setMessage("Please Wait...");

progressdialog.show();

progressdialog.setCancelable(false);

progressdialog.setCanceledOnTouchOutside(false);

}

@Override

protected String doInBackground(String... cname) {

try {

// set json url

obj_restapi.setApiUrl("http://.comp/ais/Login.ashx");
//set json parameter array

obj_restapi.setParameterList(ParameterList);

} catch (Exception e) {

Log.d("Exception", e.toString());

}

return obj_restapi.ResponseApi();

}

@Override

protected void onPostExecute(String result) {

JSONObject json2;

String value = "True";

try {

json2 = new JSONObject(result);

if (value.equals(json2.getString("Message"))) {

SharedPreferences.Editor editor = sharedpreferences.edit();

editor.putString(Email, string_email);

editor.putString(Pssword, string_password);

editor.commit();

Toast.makeText(getApplication(), "Your Well Come...",Toast.LENGTH_LONG).show();

Intent intent = new Intent(LoginActivity.this,MainActivity.class);

startActivity(intent);

overridePendingTransition(R.anim.slide_in_right,R.anim.stay);

if (progressdialog != null) {

progressdialog.dismiss();

}

else {

Toast.makeText(getApplication(), "Please Try Again...",Toast.LENGTH_LONG).show();

if (progressdialog != null) {

progressdialog.dismiss();

}

} catch (JSONException e) {

e.printStackTrace();

}

@Override

public boolean onOptionsItemSelected(MenuItem item) {

switch (item.getItemId()) {

case android.R.id.home:

onBackPressed();

overridePendingTransition(R.anim.stay, R.anim.slide_out_right);

return true;

default:

return super.onOptionsItemSelected(item);

}

@Override

public void onClick(View v) {

switch (v.getId()) {

case R.id.btn_signUp:

string_email = edit_email.getText().toString();

string_password = editText_password.getText().toString();

map.put("EmailID", string_email);

map.put("Password", string_password);

ParameterList.add(map);

new HttpAsyncTask().execute();

break;

case R.id.textView_registration:

Intent intent = new Intent(LoginActivity.this,Registrations.class);

startActivity(intent);

overridePendingTransition(R.anim.slide_in_right,R.anim.stay);

break;

default:

break;

}

Step 6:

Login json

Parameter:

{"EmailID":"com@gmail.com","Password":"123"}

Result:

{"Message":"True","Profiles":[{"ID":"30"}]}

Step 7:

Registration Json

Parameter:

{"Name":"jhone","EmailID":"com@gmail.com","Password":"123”,"Mobile1":"674543223"

}

Result:

{"Message":"True","Profiles":[{"ID":"35"}]}

Registration and Login via JSON in Android

Step 1:

Step 2:

Step 3:

Step 4:

create Resgistration.java class inside src folder.

Step 5:

create Login.java class inside src folder.

Step 6:

Step 7:

try this ,

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