I need to use FACEBOOK GRAPH API from my Android App. I downloaded Facebook SDK for Android and studied Samples given with SDK. I also studied one of the samples titled GraphApiSample. In this sample, A batch of requests are executed using the following method:
Request.executeBatchAndWait(Collection<Request> requests)
Well, Now I am trying to execute a single request but I am getting android.os.NetworkOnMainThreadException while executing request. So far I know this exception occurs when we wanna try to execute HTTP requests without using AsyncTask/Thread. But in FB sample "GraphApiSample", they executed request without any thread and it works good. Then what's wrong with my request ?
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.firstfbandroidapp"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="11"
android:targetSdkVersion="16" />
<uses-permission android:name="android.permission.INTERNET" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.firstfbandroidapp.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.facebook.LoginActivity"
android:label="@string/app_name"
android:theme="@android:style/Theme.Translucent.NoTitleBar" />
<meta-data
android:name="com.facebook.sdk.ApplicationId"
android:value="@string/app_id" />
<activity
android:name="com.example.firstfbandroidapp.AnotherActivity"
android:label="@string/title_activity_another" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
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=".MainActivity" >
<TextView
android:id="@+id/welcome"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:text="TextView" />
<Button
android:id="@+id/login_with_fb"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/welcome"
android:layout_centerHorizontal="true"
android:text="Login with Facebook" />
<com.facebook.widget.LoginButton
android:id="@+id/authButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/login_with_fb"
android:layout_alignParentTop="true"
android:layout_marginTop="47dp" />
<Button
android:id="@+id/execute_request"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/login_with_fb"
android:layout_centerHorizontal="true"
android:text="Execute Request" />
</RelativeLayout>
MainActivity.java
package com.example.firstfbandroidapp;
import java.util.ArrayList;
import java.util.List;
import org.json.JSONObject;
import com.facebook.*;
import com.facebook.model.*;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import android.content.DialogInterface;
import android.content.Intent;
import android.util.Log;
import android.view.View.OnClickListener;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
public class MainActivity extends Activity {
Button loginWithFB;
Button executeRequest;
private Session session;
private Session.StatusCallback statusCallback = new SessionStatusCallback();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
loginWithFB = (Button) findViewById(R.id.login_with_fb);
executeRequest = (Button) findViewById(R.id.execute_request);
executeRequest.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
session = Session.getActiveSession();
if (session.isOpened()) {
sendRequest();
} else {
Toast.makeText(getApplicationContext(), "No Active Session", Toast.LENGTH_LONG).show();
}
}
});
session = Session.getActiveSession();
if(session == null) {
if(savedInstanceState != null) {
session = Session.restoreSession(this, null, statusCallback, savedInstanceState);
}
if(session == null) {
session = new Session(this);
}
Session.setActiveSession(session);
Settings.addLoggingBehavior(LoggingBehavior.INCLUDE_ACCESS_TOKENS);
if(session.getState().equals(SessionState.CREATED_TOKEN_LOADED)) {
session.openForRead(new Session.OpenRequest(this).setCallback(statusCallback));
}
}
updateView();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public void onStart() {
super.onStart();
Session.getActiveSession().addCallback(statusCallback);
}
@Override
public void onStop() {
super.onStop();
Session.getActiveSession().removeCallback(statusCallback);
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
Session.getActiveSession().onActivityResult(this, requestCode, resultCode, data);
}
private void sendRequest()
{
Session session = Session.getActiveSession();
Request request = new Request(session, "me", null, HttpMethod.GET, new Request.Callback() {
@Override
public void onCompleted(Response response) {
GraphObject graphObject = response.getGraphObject();
FacebookRequestError error = response.getError();
if (graphObject != null) {
JSONObject jsonObject = graphObject.getInnerJSONObject();
Log.d("MY_TAG", jsonObject.toString());
if (graphObject.getProperty("id") != null) {
Toast.makeText(getApplicationContext(), (String)graphObject.getProperty("id"), Toast.LENGTH_LONG).show();
}
//System.out.println(jsonObject.toString());
}
}
});
Request.executeAndWait(request);
}
private void updateView() {
Session session = Session.getActiveSession();
if (session.isOpened()) {
loginWithFB.setText("Logout");
loginWithFB.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
onClickLogout();
loginWithFB.setText("Login with Facebook");
}
});
} else {
loginWithFB.setText("Login with Facebook");
loginWithFB.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
onClickLogin();
}
});
}
}
private void onClickLogin() {
Session session = Session.getActiveSession();
if (!session.isOpened() && !session.isClosed()) {
session.openForRead(new Session.OpenRequest(this).setCallback(statusCallback));
} else {
Session.openActiveSession(this, true, statusCallback);
}
}
private void onClickLogout() {
Session session = Session.getActiveSession();
if (!session.isClosed()) {
session.closeAndClearTokenInformation();
}
}
private class SessionStatusCallback implements Session.StatusCallback {
@Override
public void call(Session session, SessionState state, Exception exception) {
updateView();
}
}
}
