Android + Django rest first application

 

Django rest first application
[url]http://www.anar8.ru/forum/viewtopic.php?f=29&t=561[/url]
[url]https://youtu.be/_yewu9x0wtQ[/url]

Android

MainActivity.java

package com.example.samuray.myapplication;

import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;

import org.json.JSONException;
import org.json.JSONObject;
import org.json.JSONArray;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class MainActivity extends AppCompatActivity {


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        new ParseTask().execute();
    }

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

        HttpURLConnection urlConnection = null;
        BufferedReader reader = null;
        String resultJson = "";

        @Override
        protected String doInBackground(Void... params) {
            try {

                String site_url_json = "http://manas93.pythonanywhere.com/post";
                URL url = new URL(site_url_json);

                urlConnection = (HttpURLConnection) url.openConnection();
                urlConnection.setRequestMethod("GET");
                urlConnection.connect();

                InputStream inputStream = urlConnection.getInputStream();
                StringBuffer buffer = new StringBuffer();

                reader = new BufferedReader(new InputStreamReader(inputStream));

                String line;
                while ((line = reader.readLine()) != null) {
                    buffer.append(line);
                }

                resultJson = buffer.toString();

            } catch (Exception e) {
                e.printStackTrace();
            }
            return resultJson;
        }


        protected void onPostExecute(String strJson) {
            super.onPostExecute(strJson);

            try {
                JSONArray jsonarray = new JSONArray(strJson);
                JSONObject jsonobj = jsonarray.getJSONObject(0);

                String result_json_text =  jsonobj.getString("text");
                Log.d("FOR_LOG", result_json_text);

                TextView textView = (TextView)findViewById(R.id.showtext);
                textView.setText(result_json_text);


            } catch (JSONException e) {
                e.printStackTrace();
            }
        }
    }

}

 

activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.samuray.myapplication.MainActivity">

    <TextView
        android:id="@+id/showtext"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</android.support.constraint.ConstraintLayout>

 

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.samuray.myapplication">
    <uses-permission android:name="android.permission.INTERNET" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>