To use login without the Facebook application installed, you have to add an Acitivity in your AndroidManifest, follow the code:
<activity android:name="com.facebook.FacebookActivity"
android:configChanges=
"keyboard|keyboardHidden|screenLayout|screenSize|orientation"
android:theme="@android:style/Theme.Translucent.NoTitleBar"
android:label="@string/app_name" />
I'll show you how I did mine.
1- Create an Facebook App Develope and add in gradle
compile 'com.facebook.android:facebook-android-sdk:4.5.0'
2- Add to your AndroidManifest within the application tag
<application
android:allowBackup="true"
android:name=".MyApplication"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<meta-data
android:name="com.facebook.sdk.ApplicationId"
android:value="@string/facebook_app_id"/>
<activity
android:name=".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.FacebookActivity"
android:configChanges=
"keyboard|keyboardHidden|screenLayout|screenSize|orientation"
android:theme="@android:style/Theme.Translucent.NoTitleBar"
android:label="@string/app_name" />
</application>
3- Create a Class that extends Application, follows:
public class MyApplication extends Application {
@Override
public void onCreate() {
super.onCreate();
printKeyHash();
//FacebookSdk.sdkInitialize(getApplicationContext()); // para iniciar o FacebookSDK
}
public void printKeyHash() {
try {
PackageInfo info = getPackageManager().getPackageInfo("com.examplo.blabla", PackageManager.GET_SIGNATURES);
for (Signature signature : info.signatures) {
MessageDigest md = MessageDigest.getInstance("SHA");
md.update(signature.toByteArray());
Log.e("TAG", Base64.encodeToString(md.digest(), Base64.DEFAULT));
}
} catch (PackageManager.NameNotFoundException e) {
} catch (NoSuchAlgorithmException e) {
}
}
}
3.1- In my class has the method to display your KeyHash that you need to configure in Facebook Develope
3.2 done this comment or delete because you will not need more.
3.3 - Disable FacebookSdk to start in your application ("Do not forget")
4- I created a layout where it will have a button and a textView
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:facebook="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
tools:context=".MainFragment">
<TextView
android:id="@+id/text_details"
android:layout_width="match_parent"
android:gravity="center"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true" />
<com.facebook.login.widget.LoginButton
android:id="@+id/login_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="192dp" />
</RelativeLayout>
5- And a Fragment that will contain:
public class MainFragment extends Fragment {
private TextView mTextDetails;
private CallbackManager mCallbackManager;
private AccessTokenTracker mTokenTracker;
private ProfileTracker mProfileTracker;
private FacebookCallback<LoginResult> mFacebookCallback = new FacebookCallback<LoginResult>() {
@Override
public void onSuccess(LoginResult loginResult) {
Log.d("TAG", "onSuccess");
AccessToken accessToken = loginResult.getAccessToken();
Profile profile = Profile.getCurrentProfile();
mTextDetails.setText(constructWelcomeMessage(profile));
}
@Override
public void onCancel() {
Log.d("TAG", "onCancel");
}
@Override
public void onError(FacebookException e) {
Log.d("TAG", "onError " + e);
}
};
public MainFragment() {
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mCallbackManager = CallbackManager.Factory.create();
setupTokenTracker();
setupProfileTracker();
mTokenTracker.startTracking();
mProfileTracker.startTracking();
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_main, container, false);
}
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
setupTextDetails(view);
setupLoginButton(view);
}
@Override
public void onResume() {
super.onResume();
Profile profile = Profile.getCurrentProfile();
mTextDetails.setText(constructWelcomeMessage(profile));
}
@Override
public void onStop() {
super.onStop();
mTokenTracker.stopTracking();
mProfileTracker.stopTracking();
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
mCallbackManager.onActivityResult(requestCode, resultCode, data);
}
private void setupTextDetails(View view) {
mTextDetails = (TextView) view.findViewById(R.id.text_details);
}
private void setupTokenTracker() {
mTokenTracker = new AccessTokenTracker() {
@Override
protected void onCurrentAccessTokenChanged(AccessToken oldAccessToken, AccessToken currentAccessToken) {
Log.d("TAG", "" + currentAccessToken);
}
};
}
private void setupProfileTracker() {
mProfileTracker = new ProfileTracker() {
@Override
protected void onCurrentProfileChanged(Profile oldProfile, Profile currentProfile) {
Log.d("TAG", "" + currentProfile);
mTextDetails.setText(constructWelcomeMessage(currentProfile));
}
};
}
private void setupLoginButton(View view) {
LoginButton mButtonLogin = (LoginButton) view.findViewById(R.id.login_button);
mButtonLogin.setFragment(this);
mButtonLogin.setCompoundDrawables(null, null, null, null);
mButtonLogin.setReadPermissions("user_friends");
mButtonLogin.registerCallback(mCallbackManager, mFacebookCallback);
}
private String constructWelcomeMessage(Profile profile) {
StringBuffer stringBuffer = new StringBuffer();
if (profile != null) {
stringBuffer.append("Bem - vindo " + profile.getName());
}
return stringBuffer.toString();
}
}
6- Have your MainActivity call the Fragment.
6.1 - The user will click the login button as this will be shown in the textView a welcome message with your name.
