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.content.Context;
  28 import android.content.DialogInterface;
  29 import android.hardware.Camera;
  30 import android.hardware.Camera.Parameters;
  31 import android.view.Surface;
  32 import android.view.SurfaceHolder;
  33 import android.view.SurfaceView;
  34 import android.view.View;
  35 import android.view.WindowManager;
  36 import android.widget.TextView;
  37
  38 public class CameraDialogFragment extends BaseAlertDialogFragment implements SurfaceHolder.Callback {
  39         public static final String FRAGMENT_TAG = "fragment_camera";
  40
  41         private DecodeAsyncTask mDecodeAsyncTask;
  42         private Camera mCamera;
  43
  44         public CameraDialogFragment() {
  45                 super(R.string.scan_qr_code, R.layout.camera,
  46                         android.R.string.cancel, R.string.manual_entry, 0);
  47         }
  48
  49         @Override
  50         protected void onViewInflated(View view) {
  51                 SurfaceView sv = (SurfaceView) view.findViewById(R.id.camera_surfaceview);
  52                 sv.getHolder().addCallback(this);
  53         }
  54
  55         @Override
  56         public void onClick(DialogInterface dialog, int which) {
  57                 if (which == AlertDialog.BUTTON_NEUTRAL) {
  58                         new ManualDialogFragment().show(getFragmentManager(),
  59                                         ManualDialogFragment.FRAGMENT_TAG);
  60                 }
  61         }
  62
  63         @Override
  64         public void onDestroyView() {
  65                 if (mDecodeAsyncTask != null)
  66                         mDecodeAsyncTask.cancel(true);
  67
  68                 super.onDestroyView();
  69         }
  70
  71         @Override
  72         public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
  73                 if (mCamera == null)
  74                         return;
  75
  76                 WindowManager wm = (WindowManager) getActivity().getSystemService(Context.WINDOW_SERVICE);
  77                 switch (wm.getDefaultDisplay().getRotation()) {
  78                 case Surface.ROTATION_0:
  79                         mCamera.setDisplayOrientation(90);
  80                         break;
  81                 case Surface.ROTATION_270:
  82                         mCamera.setDisplayOrientation(180);
  83                         break;
  84                 }
  85
  86                 mCamera.startPreview();
  87         }
  88
  89         @Override
  90         @TargetApi(14)
  91         public void surfaceCreated(SurfaceHolder holder) {
  92                 try {
  93                         mCamera = Camera.open();
  94                         mCamera.setPreviewDisplay(holder);
  95
  96                         // Create the decoder thread
  97                         mDecodeAsyncTask = new DecodeAsyncTask() {
  98                                 @Override
  99                                 protected void onPostExecute(String result) {
 100                                         super.onPostExecute(result);
 101                                         if (result != null)
 102                                                 ((MainActivity) getActivity()).tokenURIReceived(result);
 103                                         mDecodeAsyncTask = null;
 104                                         dismiss();
 105                                 }
 106                         };
 107                         mDecodeAsyncTask.execute();
 108                         mCamera.setPreviewCallback(mDecodeAsyncTask);
 109
 110                         // Set auto-focus mode
 111                         Parameters params = mCamera.getParameters();
 112                         List<String> modes = params.getSupportedFocusModes();
 113                         if (modes.contains(Parameters.FOCUS_MODE_CONTINUOUS_PICTURE))
 114                                 params.setFocusMode(Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
 115                         else if (modes.contains(Parameters.FOCUS_MODE_CONTINUOUS_VIDEO))
 116                                 params.setFocusMode(Parameters.FOCUS_MODE_CONTINUOUS_VIDEO);
 117                         else if (modes.contains(Parameters.FOCUS_MODE_AUTO))
 118                                 params.setFocusMode(Parameters.FOCUS_MODE_AUTO);
 119                         mCamera.setParameters(params);
 120                 } catch (Exception e) {
 121                         SurfaceView sv = (SurfaceView) getDialog().findViewById(R.id.camera_surfaceview);
 122                         sv.setVisibility(View.INVISIBLE);
 123                         TextView tv = (TextView) getDialog().findViewById(R.id.camera_textview);
 124                         tv.setVisibility(View.VISIBLE);
 125                         e.printStackTrace();
 126                 }
 127         }
 128
 129         @Override
 130         public void surfaceDestroyed(SurfaceHolder holder) {
 131                 if (mCamera == null)
 132                         return;
 133
 134                 mCamera.stopPreview();
 135                 mCamera.setPreviewCallback(null);
 136                 mCamera.release();
 137                 mCamera = null;
 138         }
 139 }