Java tutorial
/** * Copyright (c) 2014-present, Facebook, Inc. All rights reserved. * * You are hereby granted a non-exclusive, worldwide, royalty-free license to use, * copy, modify, and distribute this software in source code or binary form for use * in connection with the web services and APIs provided by Facebook. * * As with any software that integrates with the Facebook platform, your use of * this software is subject to the Facebook Developer Principles and Policies * [http://developers.facebook.com/policy/]. This copyright notice shall be * included in all copies or substantial portions of the software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package com.facebook.share.internal; import android.app.Activity; import android.app.Dialog; import android.content.DialogInterface; import android.content.Intent; import android.os.Bundle; import android.os.Parcel; import android.os.Parcelable; import android.support.annotation.NonNull; import android.support.annotation.Nullable; import android.support.v4.app.DialogFragment; import android.text.Html; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.Button; import android.widget.ProgressBar; import android.widget.TextView; import com.facebook.FacebookRequestError; import com.facebook.GraphRequest; import com.facebook.GraphResponse; import com.facebook.HttpMethod; import com.facebook.R; import com.facebook.devicerequests.internal.DeviceRequestsHelper; import com.facebook.internal.Validate; import com.facebook.share.model.ShareContent; import com.facebook.share.model.ShareLinkContent; import com.facebook.share.model.ShareOpenGraphContent; import org.json.JSONException; import org.json.JSONObject; import java.util.concurrent.ScheduledFuture; import java.util.concurrent.ScheduledThreadPoolExecutor; import java.util.concurrent.TimeUnit; /** * com.facebook.share.internal is solely for the use of other packages within the * Facebook SDK for Android. Use of any of the classes in this package is * unsupported, and they may be modified or removed without warning at any time. */ public class DeviceShareDialogFragment extends DialogFragment { public static final String TAG = "DeviceShareDialogFragment"; private static final String DEVICE_SHARE_ENDPOINT = "device/share"; private static final String REQUEST_STATE_KEY = "request_state"; private ProgressBar progressBar; private TextView confirmationCode; private Dialog dialog; private volatile RequestState currentRequestState; private volatile ScheduledFuture codeExpiredFuture; private static ScheduledThreadPoolExecutor backgroundExecutor; private ShareContent shareContent; @Nullable @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = super.onCreateView(inflater, container, savedInstanceState); if (savedInstanceState != null) { RequestState requestState = savedInstanceState.getParcelable(REQUEST_STATE_KEY); if (requestState != null) { setCurrentRequestState(requestState); } } return view; } @NonNull @Override public Dialog onCreateDialog(Bundle savedInstanceState) { dialog = new Dialog(getActivity(), R.style.com_facebook_auth_dialog); LayoutInflater inflater = getActivity().getLayoutInflater(); View view = inflater.inflate(R.layout.com_facebook_device_auth_dialog_fragment, null); progressBar = (ProgressBar) view.findViewById(R.id.progress_bar); confirmationCode = (TextView) view.findViewById(R.id.confirmation_code); Button cancelButton = (Button) view.findViewById(R.id.cancel_button); cancelButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { dialog.dismiss(); } }); TextView instructions = (TextView) view.findViewById(R.id.com_facebook_device_auth_instructions); instructions.setText(Html.fromHtml(getString(R.string.com_facebook_device_auth_instructions))); dialog.setContentView(view); this.startShare(); return dialog; } @Override public void onDismiss(final DialogInterface dialog) { super.onDismiss(dialog); if (codeExpiredFuture != null) { codeExpiredFuture.cancel(true); } Intent resultIntent = new Intent(); finishActivity(Activity.RESULT_OK, resultIntent); } @Override public void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); if (currentRequestState != null) { outState.putParcelable(REQUEST_STATE_KEY, currentRequestState); } } private void finishActivity(int resultCode, Intent data) { DeviceRequestsHelper.cleanUpAdvertisementService(currentRequestState.getUserCode()); if (isAdded()) { Activity activity = getActivity(); activity.setResult(resultCode, data); activity.finish(); } } private void detach() { if (isAdded()) { this.getFragmentManager().beginTransaction().remove(this).commit(); } } public void setShareContent(ShareContent shareContent) { this.shareContent = shareContent; } private Bundle getGraphParametersForShareContent() { ShareContent content = this.shareContent; if (content == null) { return null; } if (content instanceof ShareLinkContent) { return WebDialogParameters.create((ShareLinkContent) content); } else if (content instanceof ShareOpenGraphContent) { return WebDialogParameters.create((ShareOpenGraphContent) content); } return null; } private void startShare() { Bundle parameters = getGraphParametersForShareContent(); if (parameters == null || parameters.size() == 0) { this.finishActivityWithError(new FacebookRequestError(0, "", "Failed to get share content")); } String accessToken = Validate.hasAppID() + "|" + Validate.hasClientToken(); parameters.putString(GraphRequest.ACCESS_TOKEN_PARAM, accessToken); parameters.putString(DeviceRequestsHelper.DEVICE_INFO_PARAM, DeviceRequestsHelper.getDeviceInfo()); GraphRequest graphRequest = new GraphRequest(null, DEVICE_SHARE_ENDPOINT, parameters, HttpMethod.POST, new GraphRequest.Callback() { @Override public void onCompleted(GraphResponse response) { FacebookRequestError error = response.getError(); if (error != null) { finishActivityWithError(error); return; } JSONObject jsonObject = response.getJSONObject(); RequestState requestState = new RequestState(); try { requestState.setUserCode(jsonObject.getString("user_code")); requestState.setExpiresIn(jsonObject.getLong("expires_in")); } catch (JSONException ex) { finishActivityWithError(new FacebookRequestError(0, "", "Malformed server response")); return; } setCurrentRequestState(requestState); } }); graphRequest.executeAsync(); } private void finishActivityWithError(FacebookRequestError error) { // detach so that we don't send a cancellation message back ondismiss. detach(); Intent intent = new Intent(); intent.putExtra("error", error); finishActivity(Activity.RESULT_OK, intent); } private static synchronized ScheduledThreadPoolExecutor getBackgroundExecutor() { if (backgroundExecutor == null) { backgroundExecutor = new ScheduledThreadPoolExecutor(1); } return backgroundExecutor; } private void setCurrentRequestState(RequestState currentRequestState) { this.currentRequestState = currentRequestState; confirmationCode.setText(currentRequestState.getUserCode()); confirmationCode.setVisibility(View.VISIBLE); progressBar.setVisibility(View.GONE); codeExpiredFuture = getBackgroundExecutor().schedule(new Runnable() { @Override public void run() { dialog.dismiss(); } }, currentRequestState.getExpiresIn(), TimeUnit.SECONDS); } private static class RequestState implements Parcelable { private String userCode; private long expiresIn; RequestState() { } public String getUserCode() { return userCode; } public void setUserCode(String userCode) { this.userCode = userCode; } public long getExpiresIn() { return expiresIn; } public void setExpiresIn(long expiresIn) { this.expiresIn = expiresIn; } protected RequestState(Parcel in) { userCode = in.readString(); expiresIn = in.readLong(); } @Override public int describeContents() { return 0; } @Override public void writeToParcel(Parcel dest, int flags) { dest.writeString(userCode); dest.writeLong(expiresIn); } @SuppressWarnings("unused") public static final Parcelable.Creator<RequestState> CREATOR = new Parcelable.Creator<RequestState>() { @Override public RequestState createFromParcel(Parcel in) { return new RequestState(in); } @Override public RequestState[] newArray(int size) { return new RequestState[size]; } }; } }