问题
I'm creating an Android app for a small business owner. I've implemented social sharing with a ShareActionProvider, and I have discovered that Facebook purposely does not allow apps to pre-populate posts. The user must enter their own text. (See this S.O. post and then this S.O. post ).
Multiple S.O. answers have indicated that by using the Facebook SDK, it is possible to achieve this result (pre-populating Facebook posts).
On the other hand, I learned that Facebook has [https://developers.facebook.com/docs/apps/review/prefill] (a policy) against doing this.
My questions are:
1) Is this really possible?
If so, how difficult is it to implement compared to the SharActionProvider?
2) Are there any popular or major apps whose Facebook sharing feature pre-populates text for the user?
3) Has Facebook been known to crack down on this policy? What has been their action towards people who break this policy?
This is the first Android app I've created and the first project I've done in 'real life'. I'm trying to figure out if adding this feature would be worth it for his business. He indicated he would like this feature to create an easy way to users to share content.
回答1:
In my app I share the quotes from various famous personalities to social media. I have integrated Facebook SDK to enable user share it on their wall. I have not faced any crackdown from Facebook. App is being used over by 5K people as of now.
So to answer your questions,
Yes, it is possible. Not difficult to implement
I am not aware of other popular apps that use this feature
No crackdown or action from FB
This is what I do to share the quote on user's FB wall.
public void onClickFBShare(View view) {
quotview = (TextView) findViewById(R.id.MainText);
line = quotview.getText().toString(); //converting the text to String
Intent FBIntent = new Intent("android.intent.action.SHAREHELPER");
FBIntent.putExtra("quote", line);
startActivity(FBIntent);
}The code to post the content is in Sharehelper.Java
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
import java.util.List;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.content.pm.Signature;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.util.Base64;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import com.facebook.Request;
import com.facebook.Response;
import com.facebook.Session;
import com.facebook.SessionState;
import com.facebook.UiLifecycleHelper;
import com.facebook.model.GraphUser;
import com.facebook.widget.LoginButton;
import com.facebook.widget.LoginButton.UserInfoChangedCallback;
public class ShareHelper extends ActionBarActivity{
private LoginButton loginBtn;
private Button updateStatusBtn;
private TextView fbquote;
private TextView userName;
private UiLifecycleHelper uiHelper;
private static final List<String> PERMISSIONS = Arrays.asList("publish_actions");
private String message;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Add code to print out the key hash
try {
PackageInfo info = getPackageManager().getPackageInfo(
"com.facebook.samples.hellofacebook",
PackageManager.GET_SIGNATURES);
for (Signature signature : info.signatures) {
MessageDigest md = MessageDigest.getInstance("SHA");
md.update(signature.toByteArray());
Log.d("KeyHash:", Base64.encodeToString(md.digest(), Base64.DEFAULT));
}
} catch (NameNotFoundException e) {
} catch (NoSuchAlgorithmException e) {
}
Intent intent = getIntent();
message = intent.getStringExtra("quote");
uiHelper = new UiLifecycleHelper(this, statusCallback);
uiHelper.onCreate(savedInstanceState);
setContentView(R.layout.sharehelper_activity);
fbquote = (TextView)findViewById(R.id.FbTextView);
fbquote.setText(message);
userName = (TextView) findViewById(R.id.user_name);
loginBtn = (LoginButton) findViewById(R.id.fb_login_button);
loginBtn.setUserInfoChangedCallback(new UserInfoChangedCallback() {
@Override
public void onUserInfoFetched(GraphUser user) {
if (user != null) {
userName.setText("Hello, " + user.getName());
} else {
userName.setText("You are not logged");
}
}
});
updateStatusBtn = (Button) findViewById(R.id.update_status);
updateStatusBtn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
postStatusMessage();
}
});
buttonsEnabled(false);
}
private Session.StatusCallback statusCallback = new Session.StatusCallback() {
@Override
public void call(Session session, SessionState state,
Exception exception) {
if (state.isOpened()) {
buttonsEnabled(true);
Log.d("FacebookSampleActivity", "Facebook session opened");
} else if (state.isClosed()) {
buttonsEnabled(false);
Log.d("FacebookSampleActivity", "Facebook session closed");
}
}
};
public void buttonsEnabled(boolean isEnabled) {
updateStatusBtn.setEnabled(isEnabled);
}
public void postStatusMessage() {
if (checkPermissions()) {
Request request = Request.newStatusUpdateRequest(
Session.getActiveSession(), message,
new Request.Callback() {
@Override
public void onCompleted(Response response) {
if (response.getError() == null)
Toast.makeText(ShareHelper.this,
"Quote Shared successfully",
Toast.LENGTH_LONG).show();
}
});
request.executeAsync();
} else {
requestPermissions();
}
}
public boolean checkPermissions() {
Session s = Session.getActiveSession();
if (s != null) {
return s.getPermissions().contains("publish_actions");
} else
return false;
}
public void requestPermissions() {
Session s = Session.getActiveSession();
if (s != null)
s.requestNewPublishPermissions(new Session.NewPermissionsRequest(
this, PERMISSIONS));
}
@Override
public void onResume() {
super.onResume();
uiHelper.onResume();
buttonsEnabled(Session.getActiveSession().isOpened());
}
@Override
public void onPause() {
super.onPause();
uiHelper.onPause();
}
@Override
public void onDestroy() {
super.onDestroy();
uiHelper.onDestroy();
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
uiHelper.onActivityResult(requestCode, resultCode, data);
}
@Override
public void onSaveInstanceState(Bundle savedState) {
super.onSaveInstanceState(savedState);
uiHelper.onSaveInstanceState(savedState);
}
}回答2:
It is possible to prefill the data, however it's really not recommended and support for it is non-existent. Facebook have explicitly highlighted it in their terms.
Pre-fill the user message parameter with any content the user didn't enter themselves, even if they can edit or delete that content before sharing. This applies to posts, comments, photo captions, and photo album captions.
While I've not seen Facebook crack down on it personally that doesn't mean that should do it. If it was a grey area you'd have grounds to fight a Facebook fight (i.e. removing a business page, blocking API access...) however it's very clear about not doing it.
来源：https://stackoverflow.com/questions/30462006/do-any-widely-used-android-apps-have-facebook-sharing-with-pre-populated-text-fi