Question

我现在正在构建一个Android应用，该应用可以检测我训练过的自定义对象。一旦检测到对象，应用程序将弹出一个按钮，将用户带到另一个活动。例如：分数，详细说明...

我一直在尝试使用Tensorflow（https://github.com/tensorflow/tensorflow/tree/master/tensorflow/examples/android）提供的示例代码。

当检测到对象时，我能够显示按钮，但是我不知道为什么单击按钮时我的应用程序总是崩溃。由于检测是在后台线程运行的，所以我知道我只能使用处理程序调用任何clicklistener。

第一个代码片段将在检测到对象时调用处理程序。第二个代码片段将调用意图进行其他活动。

runInBackground(
                new Runnable() {
                    @Override
                    public void run() {
                        LOGGER.i("Running detection on image " + currTimestamp);
                        final long startTime = SystemClock.uptimeMillis();
                        final List<Classifier.Recognition> results = detector.recognizeImage(croppedBitmap);
                        lastProcessingTimeMs = SystemClock.uptimeMillis() - startTime;

                        cropCopyBitmap = Bitmap.createBitmap(croppedBitmap);
                        final Canvas canvas = new Canvas(cropCopyBitmap);
                        final Paint paint = new Paint();
                        paint.setColor(Color.RED);
                        paint.setStyle(Style.STROKE);
                        paint.setStrokeWidth(2.0f);

                        float minimumConfidence = MINIMUM_CONFIDENCE_TF_OD_API;
                        switch (MODE) {
                            case TF_OD_API:
                                minimumConfidence = MINIMUM_CONFIDENCE_TF_OD_API;
                                break;
                            case MULTIBOX:
                                minimumConfidence = MINIMUM_CONFIDENCE_MULTIBOX;
                                break;
                            case YOLO:
                                minimumConfidence = MINIMUM_CONFIDENCE_YOLO;
                                break;
                        }

                        final List<Classifier.Recognition> mappedRecognitions =
                                new LinkedList<Classifier.Recognition>();

                            for (final Classifier.Recognition result : results) {
                                final RectF location = result.getLocation();
                                if (location != null && result.getConfidence() >= minimumConfidence) {
                                    canvas.drawRect(location, paint);

                                    Toast.makeText(DetectorActivity.this, result.getTitle(), Toast.LENGTH_LONG).show();

                                    cropToFrameTransform.mapRect(location);
                                    result.setLocation(location);
                                    mappedRecognitions.add(result);

                                    found = true; //when the object is found
                                    waitMsgHandler.sendEmptyMessage(0);
                                   
                                }
                            }
                            if(found)
                            {
                                // call handler to update UI

<!-- begin snippet: js hide: false console: true babel: false -->

                                waitMsgHandler.sendEmptyMessage(0);
                            }

                        tracker.trackResults(mappedRecognitions, luminanceCopy, currTimestamp);
                        trackingOverlay.postInvalidate();

                        requestRender();
                        computingDetection = false;

                    }
                });

Tensorflow Android在检测到对象后调用新活动

0 个答案: