Android Open Source - twitter-login-button Twitter Dialog

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License

The source code is released under:

Copyright (C) 2013 Xavier Balloy https://github.com/xballoy Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Soft...

Java Source Code

/*
 * Copyright 2011 Atos Wordline/*from   w ww .  jav  a2s .c  o m*/
 *
 * 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.awl.tumlabs.twitter.android;

import oauth.signpost.OAuth;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.res.Configuration;
import android.graphics.Bitmap;
import android.os.Bundle;
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 com.awl.tumlabs.twitter.android.TwitterLoginButton.SessionListener;
import com.twitter.android.R;

/***
 * Create a webview to launch the Twitter website to permit the user to allow
 * the application
 * 
 * @author Xavier Balloy (A504884)
 * 
 */
public class TwitterDialog extends Dialog {

  static final float[] DIMENSIONS_DIFF_LANDSCAPE = { 20, 60 };
  static final float[] DIMENSIONS_DIFF_PORTRAIT = { 40, 60 };
  static final int MARGIN = 4;
  static final int PADDING = 2;
  static final FrameLayout.LayoutParams FILL = new FrameLayout.LayoutParams(
      ViewGroup.LayoutParams.FILL_PARENT,
      ViewGroup.LayoutParams.FILL_PARENT);

  private String mUrl;
  private SessionListener mListener;
  private ProgressDialog mSpinner;
  private WebView mWebView;
  private LinearLayout mContent;
  private String callbackUrl;

  /***
   * Create a webview to launch the Twitter website to permit the user to
   * allow the application
   * 
   * @param context
   *            The activity which launch the webview
   * @param url
   *            The URL to launch
   * @param callbackUrl
   *            The callback URL to come back to the application
   * @param listener
   *            The listener to know when the webview ends
   */
  public TwitterDialog(Context context, String url, String callbackUrl,
      SessionListener listener) {
    super(context);
    this.mUrl = url;
    this.callbackUrl = callbackUrl;
    mListener = listener;
  }

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    mSpinner = new ProgressDialog(getContext());
    mSpinner.requestWindowFeature(Window.FEATURE_NO_TITLE);
    mSpinner.setMessage(getContext().getString(R.string.loading));

    mContent = new LinearLayout(getContext());
    mContent.setOrientation(LinearLayout.VERTICAL);

    setUpWebView();
    Display display = getWindow().getWindowManager().getDefaultDisplay();
    final float scale = getContext().getResources().getDisplayMetrics().density;
    int orientation = getContext().getResources().getConfiguration().orientation;
    float[] dimensions = (orientation == Configuration.ORIENTATION_LANDSCAPE) ? DIMENSIONS_DIFF_LANDSCAPE
        : DIMENSIONS_DIFF_PORTRAIT;
    addContentView(
        mContent,
        new LinearLayout.LayoutParams(display.getWidth()
            - ((int) (dimensions[0] * scale + 0.5f)), display
            .getHeight() - ((int) (dimensions[1] * scale + 0.5f))));
  }

  private void setUpWebView() {
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    mWebView = new WebView(getContext());
    mWebView.setVerticalScrollBarEnabled(false);
    mWebView.setHorizontalScrollBarEnabled(false);
    mWebView.setWebViewClient(new TwitterWebViewClient());
    mWebView.getSettings().setJavaScriptEnabled(true);
    mWebView.loadUrl(mUrl);
    mWebView.setLayoutParams(FILL);
    mContent.addView(mWebView);
  }

  private class TwitterWebViewClient extends WebViewClient {

    private final String TAG = TwitterWebViewClient.class.getSimpleName();

    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
      Log.d(TAG, "shouldOverrideUrlLoading: " + url);
      if (url.startsWith(callbackUrl)) {
        Bundle values = Util.parseUrl(url, callbackUrl);
        String oauthVerifier = values.getString(OAuth.OAUTH_VERIFIER);
        mListener.onDialogComplete(oauthVerifier);
        TwitterDialog.this.dismiss();
        return true;
      }
      return false;
    }

    @Override
    public void onPageStarted(WebView view, String url, Bitmap favicon) {
      Log.d(TAG, "onPageStarted: " + url);
      super.onPageStarted(view, url, favicon);
      mSpinner.show();
    }

    @Override
    public void onPageFinished(WebView view, String url) {
      Log.d(TAG, "onPageFinished: " + url);
      super.onPageFinished(view, url);
      mSpinner.dismiss();
    }
  }
}

Java Source Code List

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