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 java.util.List;
  24
  25 import android.annotation.TargetApi;
  26 import android.app.AlertDialog;
  27 import android.app.Dialog;
  28 import android.content.DialogInterface;
  29 import android.hardware.Camera;
  30 import android.hardware.Camera.CameraInfo;
  31 import android.hardware.Camera.Parameters;
  32 import android.os.Bundle;
  33 import android.view.Surface;
  34 import android.view.SurfaceHolder;
  35 import android.view.SurfaceView;
  36 import android.view.View;
  37 import android.widget.TextView;
  38
  39 public class CameraDialogFragment extends BaseAlertDialogFragment implements SurfaceHolder.Callback {
  40         public static final String FRAGMENT_TAG = "fragment_camera";
  41
  42         private final CameraInfo mCameraInfo = new CameraInfo();
  43         private final DecodeAsyncTask mDecodeAsyncTask;
  44         private final int mCameraId;
  45         private Camera mCamera;
  46
  47         public CameraDialogFragment() {
  48                 super(R.string.scan_qr_code, R.layout.camera,
  49                         android.R.string.cancel, R.string.manual_entry, 0);
  50
  51                 // Find a back-facing camera
  52                 int cameraId;
  53                 for (cameraId = Camera.getNumberOfCameras() - 1; cameraId >= 0; cameraId--) {
  54                         Camera.getCameraInfo(cameraId, mCameraInfo);
  55                         if (mCameraInfo.facing == CameraInfo.CAMERA_FACING_BACK)
  56                                 break;
  57                 }
  58                 mCameraId = cameraId;
  59
  60                 // Create the decoder thread
  61                 mDecodeAsyncTask = new DecodeAsyncTask() {
  62                         @Override
  63                         protected void onPostExecute(String result) {
  64                                 super.onPostExecute(result);
  65                                 if (result != null)
  66                                         ((MainActivity) getActivity()).tokenURIReceived(result);
  67                                 dismiss();
  68                         }
  69                 };
  70         }
  71
  72         @Override
  73         public void onCreate(Bundle savedInstanceState) {
  74                 super.onCreate(savedInstanceState);
  75
  76                 // If we have no back facing camera, open the manual dialog
  77                 if (mCameraId < 0) {
  78                         new ManualDialogFragment().show(getFragmentManager(),
  79                                         ManualDialogFragment.FRAGMENT_TAG);
  80                         dismiss();
  81                         return;
  82                 }
  83
  84                 mDecodeAsyncTask.execute();
  85         }
  86
  87         @Override
  88         public void onDestroy() {
  89                 super.onDestroy();
  90                 mDecodeAsyncTask.cancel(true);
  91         }
  92
  93         @Override
  94         protected void onViewInflated(View view) {
  95                 SurfaceView sv = (SurfaceView) view.findViewById(R.id.camera_surfaceview);
  96                 sv.getHolder().addCallback(this);
  97         }
  98
  99         @Override
 100         public void onClick(DialogInterface dialog, int which) {
 101                 if (which != AlertDialog.BUTTON_NEUTRAL)
 102                         return;
 103
 104                 new ManualDialogFragment().show(getFragmentManager(),
 105                                 ManualDialogFragment.FRAGMENT_TAG);
 106         }
 107
 108         @Override
 109         public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
 110                 if (mCamera == null)
 111                         return;
 112
 113                 int rotation = 0;
 114                 switch (getActivity().getWindowManager().getDefaultDisplay().getRotation()) {
 115                 case Surface.ROTATION_0:
 116                         rotation = 0;
 117                         break;
 118                 case Surface.ROTATION_90:
 119                         rotation = 90;
 120                         break;
 121                 case Surface.ROTATION_180:
 122                         rotation = 180;
 123                         break;
 124                 case Surface.ROTATION_270:
 125                         rotation = 270;
 126                         break;
 127                 }
 128
 129                 mCamera.setDisplayOrientation((mCameraInfo.orientation - rotation + 360) % 360);
 130                 mCamera.startPreview();
 131         }
 132
 133         @Override
 134         @TargetApi(14)
 135         public void surfaceCreated(SurfaceHolder holder) {
 136                 surfaceDestroyed(holder);
 137
 138                 try {
 139                         // Open the camera
 140                         mCamera = Camera.open(mCameraId);
 141                         mCamera.setPreviewDisplay(holder);
 142                         mCamera.setPreviewCallback(mDecodeAsyncTask);
 143                 } catch (Exception e) {
 144                         e.printStackTrace();
 145                         surfaceDestroyed(holder);
 146
 147                         // Show error message
 148                         Dialog d = getDialog();
 149                         SurfaceView sv = (SurfaceView) d.findViewById(R.id.camera_surfaceview);
 150                         TextView tv = (TextView) d.findViewById(R.id.camera_textview);
 151                         sv.setVisibility(View.INVISIBLE);
 152                         tv.setVisibility(View.VISIBLE);
 153                         return;
 154                 }
 155
 156                 // Set auto-focus mode
 157                 Parameters params = mCamera.getParameters();
 158                 List<String> modes = params.getSupportedFocusModes();
 159                 if (modes.contains(Parameters.FOCUS_MODE_CONTINUOUS_PICTURE))
 160                         params.setFocusMode(Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
 161                 else if (modes.contains(Parameters.FOCUS_MODE_CONTINUOUS_VIDEO))
 162                         params.setFocusMode(Parameters.FOCUS_MODE_CONTINUOUS_VIDEO);
 163                 else if (modes.contains(Parameters.FOCUS_MODE_AUTO))
 164                         params.setFocusMode(Parameters.FOCUS_MODE_AUTO);
 165                 mCamera.setParameters(params);
 166         }
 167
 168         @Override
 169         public void surfaceDestroyed(SurfaceHolder holder) {
 170                 if (mCamera == null)
 171                         return;
 172
 173                 mCamera.stopPreview();
 174                 mCamera.setPreviewCallback(null);
 175                 mCamera.release();
 176                 mCamera = null;
 177         }
 178 }