ANDROID JSON OKUMA VE LISTVIEW GÖSTERİMİ

Sizlerle örnek bir proje paylaşmak istiyorum. Github a commitlenmiş projeyi indirebilirsiniz.

https://github.com/Gmotes/AndroidListViewWithJSON

Okuma yapılacak olan JSON aşağıdaki gibidir.

{"fixtures":[{"id":-1,"date":"2015-10-05Tdk 90+:00Z","homeTeam":"Duisburg","awayTeam":"Paderborn","goalsHomeTeam":2,"goalsAwayTeam":0,"description":" GOAL! Duisburg GOAL! Duisburg","lat":51.4344079,"lng":6.762329299999999}]}

ilk iş olarak AndroidManifest.xml ine

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

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

Internet ve network accesine açıyoruz.

activity_main.xml

<RelativeLayout

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:paddingBottom="@dimen/activity_vertical_margin"

android:paddingLeft="@dimen/activity_horizontal_margin"

android:paddingRight="@dimen/activity_horizontal_margin"

android:paddingTop="@dimen/activity_vertical_margin"

tools:context="com.example.androidlistviewwithjson.MainActivity">

<ListView

android:id="@+id/list"

android:layout_width="fill_parent"

android:layout_height="fill_parent" />

</RelativeLayout>

bu kısımda ListView eklememizi yaptık.

Mylist.xml

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

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="horizontal" >

<LinearLayout

android:layout_weight="50"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:orientation="horizontal" >

<ImageView

android:id="@+id/icon"

android:layout_width="60dp"

android:layout_height="60dp"

android:padding="5dp" />

<LinearLayout

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical"

<TextView

android:id="@+id/item"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="Medium Text"

android:textAppearance="?android:attr/textAppearanceSmall"

android:layout_marginLeft="5dp"

android:layout_marginTop="3dp"

android:padding="2dp"

android:textColor="#33CC33" />

<TextView

android:id="@+id/textView1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="TextView"

android:layout_marginLeft="5dp"/>

</LinearLayout>

<LinearLayout

android:layout_weight="50"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:orientation="horizontal" >

<ImageView

android:id="@+id/icon2"

android:layout_width="30dp"

android:layout_height="30dp"

android:padding="3dp" />

<LinearLayout

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical" >

<TextView

android:id="@+id/item2"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="Medium Text"

android:textAppearance="?android:attr/textAppearanceSmall"

android:layout_marginLeft="5dp"

android:layout_marginTop="5dp"

android:padding="1dp"

android:textColor="#33CC33" />

<TextView

android:id="@+id/textView2"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="TextView"

android:layout_marginLeft="5dp"/>

</LinearLayout>

</LinearLayout>

LinearLayout kullanarak Amblem koyabileceğimiz ImageView ile Ev Sahibi ve Deplasman takım isimleri ve skorların yerleştirileceği kısımlar ekleniyor.

package com.example.androidlistviewwithjson;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;

import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import com.example.androidlistviewwithjson.model.Match;

import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;

public class MainActivity extends Activity {

CustomListAdapter adapter;

ListView list;

List matches = new ArrayList();
ListView listView;

HttpAsyncTask task;

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

task = new HttpAsyncTask(this);
task.execute("fixtures.json");

listView = (ListView) findViewById(R.id.list);

final Handler handler = new Handler();
TimerTask doAsynchronousTask = new TimerTask() {
@Override
public void run() {
handler.post(new Runnable() {
public void run() {

task = new HttpAsyncTask();
task.execute("fixtures.json");

}
});
}
};
Timer timer = new Timer();
timer.schedule(doAsynchronousTask, 40000, 40000);

}

private class HttpAsyncTask extends AsyncTask {

List matches = new ArrayList();
Activity act;

public HttpAsyncTask(Activity act) {
// TODO Auto-generated constructor stub
this.act = act;

}

public HttpAsyncTask() {
}

@Override
protected String doInBackground(String... urls) {

return GET(urls[0]);
}
// onPostExecute displays the results of the AsyncTask.
@Override
protected void onPostExecute(String result) {
Toast.makeText(getBaseContext(), "Received!", Toast.LENGTH_LONG).show();

getJSON(result);

if (adapter == null) {
adapter=new CustomListAdapter(act, matches);
list=(ListView)findViewById(R.id.list);
list.setAdapter(adapter);

list.setOnItemClickListener(new OnItemClickListener() {

@Override
public void onItemClick(AdapterView parent, View view,
int position, long id) {

// ListView Clicked item value
Match match = (Match) listView.getItemAtPosition(position);

Toast.makeText(getApplicationContext(), match.getDescription(), Toast.LENGTH_SHORT).show();

}
});
}
else {

adapter.clear();
adapter.addAll(matches);

//notify that the model changed
adapter.notifyDataSetChanged();

}

// etResponse.setText(result);
}

private void getJSON(String result) {

try {

JSONObject jsonObj = new JSONObject(result);

// Getting JSON Array node
JSONArray contacts = jsonObj.getJSONArray("fixtures");

List values = new ArrayList();
// looping through All Contacts
for (int i = 0; i < contacts.length(); i++) {
JSONObject c = contacts.getJSONObject(i);

String homeTeam = c.getString("homeTeam");
String awayTeam = c.getString("awayTeam");
String goalsHomeTeam = c.getString("goalsHomeTeam");
String goalsAwayTeam = c.getString("goalsAwayTeam");
String matchDescription = c.getString("description");

Match m = new Match();
m.setHomeTeam(homeTeam);
m.setAwayTeam(awayTeam);
m.setHomeGoalTeam(goalsHomeTeam);
m.setAwayGoalTeam(goalsAwayTeam);
m.setDescription(matchDescription);

matches.add(m);

}

} catch (JSONException e) {

Log.e("Exception", e.getMessage());
}

}

public String GET(String url){
InputStream inputStream = null;
String result = "";
try {

// create HttpClient
HttpClient httpclient = new DefaultHttpClient();

// make GET request to the given URL
HttpResponse httpResponse = httpclient.execute(new HttpGet(url));

// receive response as inputStream
inputStream = httpResponse.getEntity().getContent();

// convert inputstream to string
if(inputStream != null)
result = convertInputStreamToString(inputStream);
else
result = "Did not work!";

} catch (Exception e) {
Log.d("InputStream", e.getLocalizedMessage());
}

return result;
}

private 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;

}
}

}

40 sn de bir çalışan AsyncTask hazırlıyoruz. Bu task JSON u okuyup işleyecek. Akabinde matches değişkeninde saklayacak. Bu değişkeni gösterim yapmak üzere CustomListAdapter sınıfına gönderiyoruz.

package com.example.androidlistviewwithjson;

import java.util.List;

import com.example.androidlistviewwithjson.model.Match;

import android.app.Activity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;

public class CustomListAdapter extends ArrayAdapter {

private final Activity context;
private List matches;

public CustomListAdapter(Activity context, List matches) {
super(context, R.layout.mylist, matches);
// TODO Auto-generated constructor stub
this.context=context;
this.matches = matches;

}

public View getView(int position,View view,ViewGroup parent) {
LayoutInflater inflater=context.getLayoutInflater();
View rowView=inflater.inflate(R.layout.mylist, null,true);

TextView txtTitle = (TextView) rowView.findViewById(R.id.item);
TextView txtTitle2 = (TextView) rowView.findViewById(R.id.item2);
ImageView imageView = (ImageView) rowView.findViewById(R.id.icon);
ImageView imageView2 = (ImageView) rowView.findViewById(R.id.icon2);
TextView extratxt = (TextView) rowView.findViewById(R.id.textView1);
TextView extratxt2 = (TextView) rowView.findViewById(R.id.textView2);

Match m=matches.get(position);

txtTitle.setText(m.getHomeTeam());
txtTitle2.setText(m.getAwayTeam());
extratxt.setText(m.getHomeGoalTeam());
extratxt2.setText(m.getAwayGoalTeam());
return rowView;

};
}

İyi Çalışmalar.

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ANDROID JSON OKUMA VE LISTVIEW GÖSTERİMİ

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