Java tutorial
/* * Copyright 2010 Facebook, Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.facebook.android; import android.app.Dialog; import android.content.Context; import android.content.Intent; import android.graphics.Bitmap; import android.graphics.Color; import android.graphics.drawable.Drawable; import android.net.Uri; import android.net.http.SslError; import android.os.Bundle; import android.os.Message; import android.support.v4.app.FragmentActivity; import android.util.Log; import android.view.View; import android.view.ViewGroup.LayoutParams; import android.view.Window; import android.webkit.SslErrorHandler; import android.webkit.WebView; import android.webkit.WebViewClient; import android.widget.FrameLayout; import android.widget.ImageView; import android.widget.LinearLayout; import com.developer4droid.contactslister.R; import com.developer4droid.contactslister.ui.fragments.PopupProgressFragment; import com.developer4droid.contactslister.ui.views.PopupItem; import com.facebook.android.Facebook.DialogListener; public class FbDialog extends Dialog { static final int FB_BLUE = 0xFF6D84B4; static final float[] DIMENSIONS_DIFF_LANDSCAPE = { 20, 60 }; static final float[] DIMENSIONS_DIFF_PORTRAIT = { 40, 60 }; static final FrameLayout.LayoutParams FILL = new FrameLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT); static final int MARGIN = 4; static final int PADDING = 2; static final String DISPLAY_STRING = "touch"; static final String FB_ICON = "icon.png"; private static final String PROGRESS_TAG = "popup progress dialog"; private String mUrl; private DialogListener mListener; protected PopupItem popupProgressItem; protected PopupProgressFragment popupProgressDialogFragment; private ImageView mCrossImage; private WebView mWebView; private FrameLayout mContent; private FragmentActivity fragmentActivity; public FbDialog(Context context, String url, DialogListener listener) { super(context, android.R.style.Theme_Translucent_NoTitleBar); mUrl = url; mListener = listener; fragmentActivity = (FragmentActivity) context; } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); popupProgressItem = new PopupItem(); popupProgressDialogFragment = PopupProgressFragment.newInstance(popupProgressItem); requestWindowFeature(Window.FEATURE_NO_TITLE); mContent = new FrameLayout(getContext()); /* Create the 'x' image, but don't add to the mContent layout yet * at this point, we only need to know its drawable width and height * to place the webview */ createCrossImage(); /* Now we know 'x' drawable width and height, * layout the webivew and add it the mContent layout */ int crossWidth = mCrossImage.getDrawable().getIntrinsicWidth(); setUpWebView(crossWidth / 2); /* Finally add the 'x' image to the mContent layout and * add mContent to the Dialog view */ mContent.addView(mCrossImage, new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT)); addContentView(mContent, new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT)); } private void createCrossImage() { mCrossImage = new ImageView(getContext()); // Dismiss the dialog when user click on the 'x' mCrossImage.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { mListener.onCancel(); FbDialog.this.dismiss(); } }); Drawable crossDrawable = getContext().getResources().getDrawable(R.drawable.btn_close); mCrossImage.setImageDrawable(crossDrawable); /* 'x' should not be visible while webview is loading * make it visible only after webview has fully loaded */ mCrossImage.setVisibility(View.INVISIBLE); } private void setUpWebView(int margin) { LinearLayout webViewContainer = new LinearLayout(getContext()); mWebView = new WebView(getContext()); mWebView.setVerticalScrollBarEnabled(false); mWebView.setHorizontalScrollBarEnabled(false); mWebView.setWebViewClient(new FbDialog.FbWebViewClient()); mWebView.getSettings().setJavaScriptEnabled(true); mWebView.loadUrl(mUrl); mWebView.setLayoutParams(FILL); mWebView.setVisibility(View.INVISIBLE); webViewContainer.setPadding(margin, margin, margin, margin); webViewContainer.addView(mWebView); mContent.addView(webViewContainer); } private class FbWebViewClient extends WebViewClient { @Override public boolean shouldOverrideUrlLoading(WebView view, String url) { Util.logd("Facebook-WebView", "Redirect URL: " + url); if (url.startsWith(Facebook.REDIRECT_URI)) { Bundle values = Util.parseUrl(url); String error = values.getString("error"); if (error == null) { error = values.getString("error_type"); } if (error == null) { mListener.onComplete(values); } else if (error.equals("access_denied") || error.equals("OAuthAccessDeniedException")) { mListener.onCancel(); } else { mListener.onFacebookError(new FacebookError(error)); } FbDialog.this.dismiss(); return true; } else if (url.startsWith(Facebook.CANCEL_URI)) { mListener.onCancel(); FbDialog.this.dismiss(); return true; } else if (url.contains(DISPLAY_STRING)) { return false; } // launch non-dialog URLs in a full browser getContext().startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(url))); return true; } @Override public void onFormResubmission(WebView view, Message dontResend, Message resend) { super.onFormResubmission(view, dontResend, resend); Log.d("TEST", "onFormResubmission"); } @Override public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) { super.onReceivedSslError(view, handler, error); Log.d("TEST", "onFormResubmission"); } @Override public void onReceivedLoginRequest(WebView view, String realm, String account, String args) { super.onReceivedLoginRequest(view, realm, account, args); Log.d("TEST", "onFormResubmission"); } @Override public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) { super.onReceivedError(view, errorCode, description, failingUrl); if (popupProgressDialogFragment != null && popupProgressDialogFragment.getDialog() != null) popupProgressDialogFragment.getDialog().dismiss(); mListener.onError(new DialogError(description, errorCode, failingUrl)); FbDialog.this.dismiss(); } @Override public void onPageStarted(WebView view, String url, Bitmap favicon) { Util.logd("Facebook-WebView", "Webview loading URL: " + url); super.onPageStarted(view, url, favicon); popupProgressItem.setTitle(R.string.loading); popupProgressDialogFragment.show(fragmentActivity.getSupportFragmentManager(), PROGRESS_TAG); } @Override public void onPageFinished(WebView view, String url) { super.onPageFinished(view, url); if (popupProgressDialogFragment != null && popupProgressDialogFragment.getDialog() != null) popupProgressDialogFragment.getDialog().dismiss(); /* * Once webview is fully loaded, set the mContent background to be transparent * and make visible the 'x' image. */ mContent.setBackgroundColor(Color.TRANSPARENT); mWebView.setVisibility(View.VISIBLE); mCrossImage.setVisibility(View.VISIBLE); } } @Override public void onDetachedFromWindow() { super.onDetachedFromWindow(); if (popupProgressDialogFragment != null && popupProgressDialogFragment.getDialog() != null) { popupProgressDialogFragment.getDialog().dismiss(); popupProgressDialogFragment = null; } } }