Pileus Git - ~andy/freeotp/blob - src/org/fedorahosted/freeotp/CameraDialogFragment.java

   1 /*
   2  * FreeOTP
   3  *
   4  * Authors: Nathaniel McCallum <npmccallum@redhat.com>
   5  *
   6  * Copyright (C) 2013  Nathaniel McCallum, Red Hat
   7  *
   8  * Licensed under the Apache License, Version 2.0 (the "License");
   9  * you may not use this file except in compliance with the License.
  10  * You may obtain a copy of the License at
  11  *
  12  *     http://www.apache.org/licenses/LICENSE-2.0
  13  *
  14  * Unless required by applicable law or agreed to in writing, software
  15  * distributed under the License is distributed on an "AS IS" BASIS,
  16  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  17  * See the License for the specific language governing permissions and
  18  * limitations under the License.
  19  */
  20
  21 package org.fedorahosted.freeotp;
  22
  23 import android.app.AlertDialog;
  24 import android.content.Context;
  25 import android.content.DialogInterface;
  26 import android.hardware.Camera;
  27 import android.hardware.Camera.Parameters;
  28 import android.view.Surface;
  29 import android.view.SurfaceHolder;
  30 import android.view.SurfaceView;
  31 import android.view.View;
  32 import android.view.WindowManager;
  33 import android.widget.TextView;
  34
  35 public class CameraDialogFragment extends BaseAlertDialogFragment implements SurfaceHolder.Callback {
  36         public static final String FRAGMENT_TAG = "fragment_camera";
  37
  38         private DecodeAsyncTask mDecodeAsyncTask;
  39         private Camera mCamera;
  40
  41         public CameraDialogFragment() {
  42                 super(R.string.scan_qr_code, R.layout.camera,
  43                         android.R.string.cancel, R.string.manual_entry, 0);
  44         }
  45
  46         @Override
  47         protected void onViewInflated(View view) {
  48                 SurfaceView sv = (SurfaceView) view.findViewById(R.id.camera_surfaceview);
  49                 sv.getHolder().addCallback(this);
  50         }
  51
  52         @Override
  53         public void onClick(DialogInterface dialog, int which) {
  54                 if (which == AlertDialog.BUTTON_NEUTRAL) {
  55                         new ManualDialogFragment().show(getFragmentManager(),
  56                                         ManualDialogFragment.FRAGMENT_TAG);
  57                 }
  58         }
  59
  60         @Override
  61         public void onDestroyView() {
  62                 if (mDecodeAsyncTask != null)
  63                         mDecodeAsyncTask.cancel(true);
  64
  65                 super.onDestroyView();
  66         }
  67
  68         @Override
  69         public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
  70                 if (mCamera == null)
  71                         return;
  72
  73                 WindowManager wm = (WindowManager) getActivity().getSystemService(Context.WINDOW_SERVICE);
  74                 switch (wm.getDefaultDisplay().getRotation()) {
  75                 case Surface.ROTATION_0:
  76                         mCamera.setDisplayOrientation(90);
  77                         break;
  78                 case Surface.ROTATION_270:
  79                         mCamera.setDisplayOrientation(180);
  80                         break;
  81                 }
  82
  83                 mCamera.startPreview();
  84         }
  85
  86         @Override
  87         public void surfaceCreated(SurfaceHolder holder) {
  88                 try {
  89                         mCamera = Camera.open();
  90                         mCamera.setPreviewDisplay(holder);
  91
  92                         // Create the decoder thread
  93                         mDecodeAsyncTask = new DecodeAsyncTask() {
  94                                 @Override
  95                                 protected void onPostExecute(String result) {
  96                                         super.onPostExecute(result);
  97                                         if (result != null)
  98                                                 ((MainActivity) getActivity()).tokenURIReceived(result);
  99                                         mDecodeAsyncTask = null;
 100                                         dismiss();
 101                                 }
 102                         };
 103                         mDecodeAsyncTask.execute();
 104                         mCamera.setPreviewCallback(mDecodeAsyncTask);
 105
 106                         // Set auto-focus mode
 107                         Parameters params = mCamera.getParameters();
 108                         params.setFocusMode(Parameters.FOCUS_MODE_CONTINUOUS_VIDEO);
 109                         mCamera.setParameters(params);
 110                 } catch (Exception e) {
 111                         SurfaceView sv = (SurfaceView) getDialog().findViewById(R.id.camera_surfaceview);
 112                         sv.setVisibility(View.INVISIBLE);
 113                         TextView tv = (TextView) getDialog().findViewById(R.id.camera_textview);
 114                         tv.setVisibility(View.VISIBLE);
 115                         e.printStackTrace();
 116                 }
 117         }
 118
 119         @Override
 120         public void surfaceDestroyed(SurfaceHolder holder) {
 121                 if (mCamera == null)
 122                         return;
 123
 124                 mCamera.stopPreview();
 125                 mCamera.setPreviewCallback(null);
 126                 mCamera.release();
 127                 mCamera = null;
 128         }
 129 }