How to use

setMinimumScaleType

method

in

com.davemorrissey.labs.subscaleview.SubsamplingScaleImageView

public void setInitScaleType(int initScaleType) {
  if (mSSIV == null) {
    return;
  }
  mInitScaleType = initScaleType;
  switch (initScaleType) {
    case INIT_SCALE_TYPE_CENTER_CROP:
      mSSIV.setMinimumScaleType(SubsamplingScaleImageView.SCALE_TYPE_CENTER_CROP);
      break;
    case INIT_SCALE_TYPE_CUSTOM:
      mSSIV.setMinimumScaleType(SubsamplingScaleImageView.SCALE_TYPE_CUSTOM);
      break;
    case INIT_SCALE_TYPE_START:
      mSSIV.setMinimumScaleType(SubsamplingScaleImageView.SCALE_TYPE_START);
      break;
    case INIT_SCALE_TYPE_CENTER_INSIDE:
    default:
      mSSIV.setMinimumScaleType(SubsamplingScaleImageView.SCALE_TYPE_CENTER_INSIDE);
      break;
  }
  if (mDisplayOptimizeListener != null) {
    mDisplayOptimizeListener.setInitScaleType(initScaleType);
  }
}

@Override
protected void initValues() {
  sliderIv.setMinimumScaleType(SubsamplingScaleImageView.SCALE_TYPE_CENTER_CROP);
  sliderIv.setDoubleTapZoomStyle(SubsamplingScaleImageView.ZOOM_FOCUS_CENTER);
  Bundle bundle = getArguments();
  if (bundle != null) {
    mUrl = bundle.getString(URL);
    mWidth = bundle.getInt(SIZE_WIDTH);
    mHeight = bundle.getInt(SIZE_HEIGHT);
  }
  KLog.d("mUrl:" + mUrl);
  loadImageBitmap(mUrl);
}

private SubsamplingScaleImageView getLongImageView(ImageSource imageSource, File file, int orientation, float hScale) {
  SubsamplingScaleImageView imageView = new SubsamplingScaleImageView(this);
  if (orientation == 1) {//纵向图
    imageView.setMinimumScaleType(SubsamplingScaleImageView.SCALE_TYPE_CENTER_CROP);
    imageView.setImage(imageSource, new ImageViewState(0, new PointF(0, 0), SubsamplingScaleImageView.ORIENTATION_0));
  } else {//横向长图
    if (file != null) {
      //因为这里展示的是原图，不是经过fresco压缩的bitmap，这里拿到图片的原始宽高，从新计算最大缩放比
      hScale = screenHeight / BitmapUtil.getImageSize(file.getAbsolutePath())[1];
    }
    imageView.setMaxScale(hScale);
    imageView.setImage(imageSource);
  }
  imageView.setOnClickListener(onClickListener);
  //图片下载完成并且开启图片保存才给长按保存
  imageView.setOnLongClickListener(this);
  return imageView;
}

/**
 * 加载超长图
 */
private SubsamplingScaleImageView loadLongPhoto(File file, int orientation, int hScale) {
  SubsamplingScaleImageView imageView = new SubsamplingScaleImageView(this);
  imageView.setOnClickListener(onClickListener);
  imageView.setBackgroundColor(getResources().getColor(android.R.color.black));
  if (file != null && file.exists()) {
    if (orientation == 1) {//纵向图
      imageView.setMinimumScaleType(SubsamplingScaleImageView.SCALE_TYPE_CENTER_CROP);
      imageView.setImage(ImageSource.uri(file.getAbsolutePath()), new ImageViewState(0, new PointF(0, 0), SubsamplingScaleImageView.ORIENTATION_0));
    } else {
      imageView.setMaxScale(hScale);
      imageView.setImage(ImageSource.uri(file.getAbsolutePath()));
    }
  } else {
    imageView.setImage(ImageSource.resource(R.mipmap.failure_image));
  }
  return imageView;
}

imageView.setMinimumScaleType(SubsamplingScaleImageView.SCALE_TYPE_CENTER_CROP);