问题
As the title implies , I would like to share something via facebook/twitter in android .If the facebook/twitter is installed , I want to share the post via the fb/twitter application , otherwise I want to direct to the user to the browser . I can direct the user to the browser it is easy , but how can I share post via the fb/twitter application ?
Thanks..
(Editted) I've tried to do this , examined developers.facebook.com , however they're doing this operation via fragments. I want to do it with default activity . I've tried the code below however I'm getting error like
W/dalvikvm(16093): VFY: unable to find class referenced in signature (Landroid/support/v4/app/Fragment;)
W/dalvikvm(16093): VFY: unable to find class referenced in signature (Landroid/support/v4/app/Fragment;)
W/dalvikvm(16093): VFY: unable to resolve static method 367: Landroid/support/v4/content/LocalBroadcastManager;.getInstance (Landroid/content/Context;)Landroid/support/v4/content/LocalBroadcastManager;
The code I used in the default activity is :
private void publishStory() {
Session currentSession = Session.getActiveSession();
if (currentSession != null){
Bundle postParams = new Bundle();
postParams.putString("name", Commons.campaignname);
postParams.putString("display", "touch");
postParams.putString("link", Commons.campaignlink");
postParams.putString("picture",Commons.campaignimage);
Request.Callback callback= new Request.Callback() {
public void onCompleted(Response response) {
JSONObject graphResponse = response
.getGraphObject()
.getInnerJSONObject();
String postId = null;
try {
postId = graphResponse.getString("id");
} catch (JSONException e) {
Log.i("TAG",
"JSON error "+ e.getMessage());
}
FacebookRequestError error = response.getError();
if (error != null) {
Toast.makeText(getApplicationContext(),
error.getErrorMessage(),
Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(getApplicationContext(),
postId,
Toast.LENGTH_LONG).show();
}
}
};
Request request = new Request(currentSession, "me/feed", postParams,
HttpMethod.POST, callback);
RequestAsyncTask task = new RequestAsyncTask(request);
task.execute();
}
}
private boolean isSubsetOf(Collection<String> subset, Collection<String> superset) {
for (String string : subset) {
if (!superset.contains(string)) {
return false;
}
}
return true;
}
回答1:
To post something using Facebook than integrate Facebook android sdk
Getting Started with the Facebook SDK for Android
Use Feed Dialog to post on Facebook. It automatically open fb app if it is installed otherwise open in browser
Post to wall
public class PhotoViewer extends Activity implements StatusCallback{
Button btnShare;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_photo_viewer);
btnShare = (Button) findViewById(R.id.btnShare);
btnShare.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
Session.openActiveSession(PhotoViewer.this, true, PhotoViewer.this);
}
});
}
@Override
public void call(Session session, SessionState state, Exception exception) {
if (session.isOpened()) {
publishFeedDialog();
}
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
Session.getActiveSession().onActivityResult(this, requestCode, resultCode, data);
}
private void publishFeedDialog() {
Bundle params = new Bundle();
params.putString("name", "Facebook SDK for Android");
params.putString("caption", "Build great social apps and get more installs.");
params.putString("description", "The Facebook SDK for Android makes it easier and faster to develop Facebook integrated Android apps.");
params.putString("link", "https://developers.facebook.com/android");
params.putString("picture", "https://raw.github.com/fbsamples/ios-3.x-howtos/master/Images/iossdk_logo.png");
WebDialog feedDialog = (
new WebDialog.FeedDialogBuilder(PhotoViewer.this,
Session.getActiveSession(),
params))
.setOnCompleteListener(new OnCompleteListener() {
@Override
public void onComplete(Bundle values,FacebookException error) {
if (error == null) {
// When the story is posted, echo the success
// and the post Id.
final String postId = values.getString("post_id");
if (postId != null) {
//Toast.makeText(PhotoViewer.this,"Posted story, id: "+postId,Toast.LENGTH_SHORT).show();
Toast.makeText(getApplicationContext(), "Publish Successfully!", Toast.LENGTH_SHORT).show();
} else {
// User clicked the Cancel button
Toast.makeText(getApplicationContext(), "Publish cancelled", Toast.LENGTH_SHORT).show();
}
} else if (error instanceof FacebookOperationCanceledException) {
// User clicked the "x" button
Toast.makeText(getApplicationContext(), "Publish cancelled", Toast.LENGTH_SHORT).show();
} else {
// Generic, ex: network error
Toast.makeText(getApplicationContext(),"Error posting story",Toast.LENGTH_SHORT).show();
}
}
})
.build();
feedDialog.show();
}
}
If you are not using a Fragment than use you Context like ClassName.this instead of getActivity()
EDIT
please add this code in onCreate() to print Hash key
// Add code to print out the key hash
PackageInfo info = getPackageManager().getPackageInfo("com.your.package", // replace with your package name
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));
}
回答2:
by this code you can check if facebook or twitter application is installed on the device. rest you can put your logic if condition is false
final PackageManager pm = getPackageManager();
List<ApplicationInfo> packages = pm
.getInstalledApplications(PackageManager.GET_META_DATA);
for (ApplicationInfo packageInfo : packages) {
Log.d(TAG, "Installed package : " + packageInfo.packageName);
}
Then you can check if packageInfo.packageName is equal to some string which contains the package name of that application.
来源：https://stackoverflow.com/questions/17164455/share-via-facebook-twitter-application-in-android-dont-open-browser-if-facebo