remoting/android/java/src/org/chromium/chromoting/HelpActivity.java

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 package org.chromium.chromoting;
   6
   7 import android.app.Activity;
   8 import android.content.ComponentName;
   9 import android.content.Intent;
  10 import android.content.ServiceConnection;
  11 import android.content.pm.PackageInfo;
  12 import android.content.pm.PackageManager;
  13 import android.graphics.Bitmap;
  14 import android.net.Uri;
  15 import android.os.Binder;
  16 import android.os.Bundle;
  17 import android.os.IBinder;
  18 import android.os.Parcel;
  19 import android.os.RemoteException;
  20 import android.support.v7.app.ActionBarActivity;
  21 import android.text.TextUtils;
  22 import android.util.Log;
  23 import android.view.Menu;
  24 import android.view.MenuItem;
  25 import android.view.View;
  26 import android.webkit.WebView;
  27 import android.webkit.WebViewClient;
  28
  29 import org.chromium.ui.UiUtils;
  30
  31 /**
  32  * The Activity for showing the Help screen.
  33  */
  34 public class HelpActivity extends ActionBarActivity {
  35     private static final String PLAY_STORE_URL = "market://details?id=";
  36     private static final String CREDITS_URL = "file:///android_res/raw/credits.html";
  37
  38     private static final String FEEDBACK_PACKAGE = "com.google.android.gms";
  39
  40     private static final String FEEDBACK_CLASS =
  41             "com.google.android.gms.feedback.LegacyBugReportService";
  42
  43     /**
  44      * Maximum dimension for the screenshot to be sent to the Send Feedback handler.  This size
  45      * ensures the size of bitmap < 1MB, which is a requirement of the handler.
  46      */
  47     private static final int MAX_FEEDBACK_SCREENSHOT_DIMENSION = 600;
  48
  49     /**
  50      * This global variable is used for passing the screenshot from the originating Activity to the
  51      * HelpActivity. There seems to be no better way of doing this.
  52      */
  53     private static Bitmap sScreenshot;
  54
  55     /** WebView used to display help content and credits. */
  56     private WebView mWebView;
  57
  58     /** Constant used to send the feedback parcel to the system feedback service. */
  59     private static final int SEND_FEEDBACK_INFO = Binder.FIRST_CALL_TRANSACTION;
  60
  61     /** Launches an external web browser or application. */
  62     private void openUrl(String url) {
  63         Uri uri = Uri.parse(url);
  64         Intent intent = new Intent(Intent.ACTION_VIEW, uri);
  65
  66         // Verify that the device can launch an application for this intent, otherwise
  67         // startActivity() may crash the application.
  68         if (intent.resolveActivity(getPackageManager()) != null) {
  69             startActivity(intent);
  70         }
  71     }
  72
  73     private void sendFeedback() {
  74         Intent intent = new Intent(Intent.ACTION_BUG_REPORT);
  75         intent.setComponent(new ComponentName(FEEDBACK_PACKAGE, FEEDBACK_CLASS));
  76         if (getPackageManager().resolveService(intent, 0) == null) {
  77             Log.e("help", "Unable to resolve Feedback service.");
  78             return;
  79         }
  80
  81         ServiceConnection conn = new ServiceConnection() {
  82             @Override
  83             public void onServiceConnected(ComponentName name, IBinder service) {
  84                 try {
  85                     Parcel parcel = Parcel.obtain();
  86                     if (sScreenshot != null) {
  87                         sScreenshot.writeToParcel(parcel, 0);
  88                     }
  89                     service.transact(SEND_FEEDBACK_INFO, parcel, null, 0);
  90                     parcel.recycle();
  91                 } catch (RemoteException ex) {
  92                     Log.e("help", "Unexpected error sending feedback: ", ex);
  93                 }
  94             }
  95
  96             @Override
  97             public void onServiceDisconnected(ComponentName name) {}
  98         };
  99
 100         bindService(intent, conn, BIND_AUTO_CREATE);
 101     }
 102
 103     /** Launches the Help activity. */
 104     public static void launch(Activity activity, String helpUrl) {
 105         View rootView = activity.getWindow().getDecorView().getRootView();
 106         sScreenshot = UiUtils.generateScaledScreenshot(rootView, MAX_FEEDBACK_SCREENSHOT_DIMENSION,
 107                 Bitmap.Config.ARGB_8888);
 108
 109         Intent intent = new Intent(activity, HelpActivity.class);
 110         intent.setData(Uri.parse(helpUrl));
 111         activity.startActivity(intent);
 112     }
 113
 114     @Override
 115     public void onCreate(Bundle savedInstanceState) {
 116         super.onCreate(savedInstanceState);
 117
 118         mWebView = new WebView(this);
 119         setContentView(mWebView);
 120
 121         getSupportActionBar().setTitle(getString(R.string.actionbar_help_title));
 122
 123         CharSequence appName = getTitle();
 124         CharSequence versionName = null;
 125         try {
 126             PackageInfo info = getPackageManager().getPackageInfo(getPackageName(), 0);
 127             versionName = info.versionName;
 128         } catch (PackageManager.NameNotFoundException ex) {
 129             throw new RuntimeException("Unable to get version: " + ex);
 130         }
 131
 132         CharSequence subtitle = TextUtils.concat(appName, " ", versionName);
 133         getSupportActionBar().setSubtitle(subtitle);
 134
 135         String initialUrl = getIntent().getDataString();
 136         final String initialHost = Uri.parse(initialUrl).getHost();
 137
 138         mWebView.getSettings().setJavaScriptEnabled(true);
 139         mWebView.setWebViewClient(new WebViewClient() {
 140             @Override
 141             public boolean shouldOverrideUrlLoading(WebView view, String url) {
 142                 // Make sure any links to other websites open up in an external browser.
 143                 String host = Uri.parse(url).getHost();
 144
 145                 // Note that |host| might be null, so allow for this in the test for equality.
 146                 if (initialHost.equals(host)) {
 147                     return false;
 148                 }
 149                 openUrl(url);
 150                 return true;
 151             }
 152         });
 153         mWebView.loadUrl(initialUrl);
 154     }
 155
 156     @Override
 157     public boolean onCreateOptionsMenu(Menu menu) {
 158         getMenuInflater().inflate(R.menu.help_actionbar, menu);
 159         return super.onCreateOptionsMenu(menu);
 160     }
 161
 162     @Override
 163     public boolean onOptionsItemSelected(MenuItem item) {
 164         int id = item.getItemId();
 165         if (id == R.id.actionbar_feedback) {
 166             sendFeedback();
 167             return true;
 168         }
 169         if (id == R.id.actionbar_play_store) {
 170             openUrl(PLAY_STORE_URL + getPackageName());
 171             return true;
 172         }
 173         if (id == R.id.actionbar_credits) {
 174             mWebView.loadUrl(CREDITS_URL);
 175             return true;
 176         }
 177         return super.onOptionsItemSelected(item);
 178     }
 179 }