Facebook Integration with Android App - PostToWall Dynamic message

Steps to Integrate Facebook in Android Application:
1. download facebook library from https://github.com/facebook/facebook-android-sdk/
2. create a new android project with existing source code and give the path of above downloaded "facebook" folder only.
3. create new project.
4. First Activity:



package com.taran.android;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

public class PostMsgActivity extends Activity {
Button btnShow;
EditText etText;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.v("t","ONCreate....");
setContentView(R.layout.main);
}
protected void onStart() {
super.onStart();
Log.v("t","onStart....");
btnShow = (Button)findViewById(R.id.btnShow);
etText = (EditText)findViewById(R.id.etText);

btnShow.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
String str = etText.getText().toString();
Intent intent = new Intent(PostMsgActivity.this,FBAppActivity.class);
intent.putExtra("facebookMessage", str);
startActivity(intent);

}
});

}

}

Main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="250dp"
    android:layout_height="125dp" >

    <Button
        android:id="@+id/btnShow"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:text="SHOW" />

    <EditText
        android:id="@+id/etText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:ems="10" />

</RelativeLayout>


Second Activity:

package com.taran.android;

import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.Window;
import android.widget.Toast;

import com.facebook.android.DialogError;
import com.facebook.android.Facebook;
import com.facebook.android.Facebook.DialogListener;
import com.facebook.android.FacebookError;

public class FBAppActivity extends Activity {
private static final String APP_ID = "434327979941439";
private static final String[] PERMISSIONS = new String[]
{ "publish_stream" };

private static final String TOKEN = "access_token";
private static final String EXPIRES = "expires_in";
private static final String KEY = "facebook-credentials";

private Facebook facebook;
private String messageToPost;

public boolean saveCredentials(Facebook facebook) {
Editor editor = getApplicationContext().getSharedPreferences(KEY, Context.MODE_PRIVATE).edit();
editor.putString(TOKEN, facebook.getAccessToken());
editor.putLong(EXPIRES, facebook.getAccessExpires());
return editor.commit();
}

public boolean restoreCredentials(Facebook facebook) {
SharedPreferences sharedPreferences = getApplicationContext().getSharedPreferences(KEY, Context.MODE_PRIVATE);
facebook.setAccessToken(sharedPreferences.getString(TOKEN, null));
facebook.setAccessExpires(sharedPreferences.getLong(EXPIRES, 0));
return facebook.isSessionValid();
}

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

facebook = new Facebook(APP_ID);
restoreCredentials(facebook);

requestWindowFeature(Window.FEATURE_NO_TITLE);

setContentView(R.layout.facebook_sample);

String facebookMessage = getIntent().getStringExtra("facebookMessage");
if (facebookMessage == null) {
facebookMessage = "Test wall post";
}
messageToPost = facebookMessage;
}

public void doNotShare(View button) {
finish();
}

public void share(View button) {
if (!facebook.isSessionValid()) {
loginAndPostToWall();
} else {
postToWall(messageToPost);
}
}

public void loginAndPostToWall() {
facebook.authorize(this, PERMISSIONS, Facebook.FORCE_DIALOG_AUTH, new LoginDialogListener());
}

public void postToWall(String message) {
Bundle parameters = new Bundle();
parameters.putString("message", message);
parameters.putString("description", "topic share");
try {
facebook.request("me");
String response = facebook.request("me/feed", parameters, "POST");
Log.d("Tests", "got response: " + response);
if (response == null || response.equals("") || response.equals("false")) {
showToast("Blank response.");
} else {
showToast("Message posted to your facebook wall!");
}
finish();
} catch (Exception e) {
showToast("Failed to post to wall!");
e.printStackTrace();
finish();
}
}

class LoginDialogListener implements DialogListener {
public void onComplete(Bundle values) {
saveCredentials(facebook);
if (messageToPost != null) {
postToWall(messageToPost);
}
}

public void onFacebookError(FacebookError error) {
showToast("Authentication with Facebook failed!");
finish();
}

public void onError(DialogError error) {
showToast("Authentication with Facebook failed!");
finish();
}

public void onCancel() {
showToast("Authentication with Facebook cancelled!");
finish();
}
}

private void showToast(String message) {
Toast.makeText(getApplicationContext(), message, Toast.LENGTH_SHORT).show();
}


}


Facebook_sample.xml


<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="250dp"
    android:layout_height="125dp" >

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_gravity="center"
        android:orientation="vertical"
        android:padding="5dp" >

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal"
            android:padding="5dp"
            android:text="Do you want to share this on Facebook?" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_gravity="center"
        android:orientation="horizontal" >

        <Button
            android:id="@+id/FacebookShareButton"
            android:layout_width="120dp"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:layout_centerHorizontal="true"
            android:layout_gravity="center_horizontal"
            android:layout_margin="2dp"
            android:onClick="share"
            android:padding="5dp"
            android:text="Yes" />

        <Button
            android:id="@+id/FacebookShareNotButton"
            android:layout_width="120dp"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:layout_centerHorizontal="true"
            android:layout_gravity="center_horizontal"
            android:layout_margin="2dp"
            android:onClick="doNotShare"
            android:padding="5dp"
            android:text="No" />
    </LinearLayout>

</RelativeLayout>

AndroidManifest file:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.taran.android"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="8" />

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

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:name=".PostMsgActivity"
            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=".FBAppActivity"
            android:screenOrientation="portrait"
            android:theme="@android:style/Theme.Dialog" >
        </activity>
    </application>

</manifest>

Any Confusions,Feel free to ask.