tensorflow/examples/android/src/org/tensorflow/demo/RecognitionScoreView.java


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package org.tensorflow.demo;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.View;

import org.tensorflow.demo.Classifier.Recognition;

import java.util.List;

public class RecognitionScoreView extends View {
  private static final float TEXT_SIZE_DIP = 24;
  private List<Recognition> results;
  private final float textSizePx;
  private final Paint fgPaint;
  private final Paint bgPaint;

  public RecognitionScoreView(final Context context, final AttributeSet set) {
    super(context, set);

    textSizePx =
        TypedValue.applyDimension(
            TypedValue.COMPLEX_UNIT_DIP, TEXT_SIZE_DIP, getResources().getDisplayMetrics());
    fgPaint = new Paint();
    fgPaint.setTextSize(textSizePx);

    bgPaint = new Paint();
    bgPaint.setColor(0xcc4285f4);
  }

  public void setResults(final List<Recognition> results) {
    this.results = results;
    postInvalidate();
  }

  @Override
  public void onDraw(final Canvas canvas) {
    final int x = 10;
    int y = (int) (fgPaint.getTextSize() * 1.5f);

    canvas.drawPaint(bgPaint);

    if (results != null) {
      for (final Recognition recog : results) {
        canvas.drawText(recog.getTitle() + ": " + recog.getConfidence(), x, y, fgPaint);
        y += fgPaint.getTextSize() * 1.5f;
      }
    }
  }
}