Java tutorial
/* * Copyright 2010 Foursquare, 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.frublin.androidoauth2; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import org.apache.http.HttpResponse; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.DefaultHttpClient; import org.json.JSONException; import org.json.JSONObject; import android.app.Dialog; import android.app.ProgressDialog; import android.content.Context; import android.content.Intent; import android.graphics.Bitmap; import android.graphics.Color; import android.graphics.Typeface; import android.graphics.drawable.Drawable; import android.net.Uri; import android.os.Bundle; import android.preference.PreferenceManager; import android.util.Log; import android.view.Display; import android.view.ViewGroup; import android.view.Window; import android.webkit.WebView; import android.webkit.WebViewClient; import android.widget.FrameLayout; import android.widget.LinearLayout; import android.widget.TextView; import com.frublin.androidoauth2.AndroidOAuth.FSDialogListener; public class FsDialog extends Dialog { static final int FS_BLUE = 0xFF6D84B4; static final float[] DIMENSIONS_LANDSCAPE = { 460, 260 }; static final float[] DIMENSIONS_PORTRAIT = { 280, 420 }; static final FrameLayout.LayoutParams FILL = new FrameLayout.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.FILL_PARENT); static final int MARGIN = 4; static final int PADDING = 2; static final String DISPLAY_STRING = "touch"; private String mUrl; private FSDialogListener mListener; private ProgressDialog mSpinner; private WebView mWebView; private LinearLayout mContent; private TextView mTitle; private String LOG_TAG = "Foursquare Dialog: "; private AndroidOAuth androidOAuth; private Context parentContext; public FsDialog(Context context, String url, FSDialogListener listener, AndroidOAuth mAndroidOAuth) { super(context); mUrl = url; mListener = listener; androidOAuth = mAndroidOAuth; parentContext = context; } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mSpinner = new ProgressDialog(getContext()); mSpinner.requestWindowFeature(Window.FEATURE_NO_TITLE); mSpinner.setMessage("Loading..."); mContent = new LinearLayout(getContext()); mContent.setOrientation(LinearLayout.VERTICAL); setUpTitle(); setUpWebView(); Display display = getWindow().getWindowManager().getDefaultDisplay(); final float scale = getContext().getResources().getDisplayMetrics().density; float[] dimensions = (display.getWidth() < display.getHeight()) ? DIMENSIONS_PORTRAIT : DIMENSIONS_LANDSCAPE; addContentView(mContent, new FrameLayout.LayoutParams((int) (dimensions[0] * scale + 0.5f), (int) (dimensions[1] * scale + 0.5f))); } private void setUpTitle() { requestWindowFeature(Window.FEATURE_NO_TITLE); Drawable icon = getContext().getResources().getDrawable(R.drawable.foursquareicon); mTitle = new TextView(getContext()); mTitle.setText("Foursquare"); mTitle.setTextColor(Color.WHITE); mTitle.setTypeface(Typeface.DEFAULT_BOLD); mTitle.setBackgroundColor(FS_BLUE); mTitle.setPadding(MARGIN + PADDING, MARGIN, MARGIN, MARGIN); mTitle.setCompoundDrawablePadding(MARGIN + PADDING); mTitle.setCompoundDrawablesWithIntrinsicBounds(icon, null, null, null); mContent.addView(mTitle); } private void setUpWebView() { mWebView = new WebView(getContext()); mWebView.setVerticalScrollBarEnabled(false); mWebView.setHorizontalScrollBarEnabled(false); mWebView.setWebViewClient(new FsDialog.FsWebViewClient()); mWebView.getSettings().setJavaScriptEnabled(true); mWebView.loadUrl(mUrl); mWebView.setLayoutParams(FILL); mContent.addView(mWebView); } private class FsWebViewClient extends WebViewClient { @Override public boolean shouldOverrideUrlLoading(WebView view, String url) { Log.d("Foursquare-WebView", "Redirect URL: " + url); if (url.startsWith(AndroidOAuth.REDIRECT_URI)) { String authorizedCode = (Uri.parse(url)).getQueryParameter("code"); Log.d(LOG_TAG, "Auth code: " + authorizedCode); Log.d(LOG_TAG, "Auth URL : " + androidOAuth.getAccessTokenUrl(authorizedCode)); HttpGet request = new HttpGet(androidOAuth.getAccessTokenUrl(authorizedCode)); DefaultHttpClient client = new DefaultHttpClient(); try { HttpResponse resp = client.execute(request); int responseCode = resp.getStatusLine().getStatusCode(); Log.d(LOG_TAG, "Reponse code: " + responseCode); if (responseCode >= 200 && responseCode < 300) { String response = responseToString(resp); JSONObject jsonObj = new JSONObject(response); androidOAuth.saveAccessToken(PreferenceManager.getDefaultSharedPreferences(parentContext), jsonObj.getString("access_token")); } else { Log.e(LOG_TAG, "Foursquare error: " + responseToString(resp)); mListener.onFoursquareError( new FoursquareError("Authentication Failed with Response Code: " + responseCode)); } } catch (ClientProtocolException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (JSONException e) { // TODO Auto-generated catch block e.printStackTrace(); } mListener.onComplete(); FsDialog.this.dismiss(); return true; } else if (url.startsWith(AndroidOAuth.CANCEL_URI)) { mListener.onCancel(); FsDialog.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; } private String responseToString(HttpResponse resp) throws IllegalStateException, IOException { BufferedReader in = new BufferedReader(new InputStreamReader(resp.getEntity().getContent())); StringBuffer sb = new StringBuffer(); String line = ""; while ((line = in.readLine()) != null) { sb.append(line); } in.close(); return sb.toString(); } @Override public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) { super.onReceivedError(view, errorCode, description, failingUrl); mListener.onError(new DialogError(description, errorCode, failingUrl)); FsDialog.this.dismiss(); } @Override public void onPageStarted(WebView view, String url, Bitmap favicon) { Log.d("Foursquare-WebView", "Webview loading URL: " + url); super.onPageStarted(view, url, favicon); mSpinner.show(); } @Override public void onPageFinished(WebView view, String url) { super.onPageFinished(view, url); String title = mWebView.getTitle(); if (title != null && title.length() > 0) { mTitle.setText(title); } mSpinner.dismiss(); } } }