Question

从动态选择用户图库中的图像的代码，然后将图像显示在传递给函数的3d模型的表面上。以下是主要活动中的函数调用：

@Override
  public void onSurfaceCreated(GL10 gl, EGLConfig config) {
  GLES20.glClearColor(0.1f, 0.1f, 0.1f, 1.0f);

// Prepare the rendering objects. This involves reading shaders, so may throw an IOException.
try {
  // Create the texture and pass it to ARCore session to be filled during update().
  backgroundRenderer.createOnGlThread(/*context=*/ this);
  augmentedImageRenderer.createOnGlThread(/*context=*/ this);
} catch (IOException e) {
  Log.e(TAG, "Failed to read an asset file", e);
 }
}

在AugmentedImageRenderer文件中，该函数定义如下：

public void createOnGlThread(Context context) throws IOException {

corkboardObj.createOnGlThread(
    context, "models/Test3.obj", "models/wood.png");
//    imageFrameUpperLeft.setMaterialProperties(0.0f, 3.5f, 1.0f, 6.0f);
corkboardObj.setBlendMode(BlendMode.SourceAlpha);

paper.createOnGlThread(context, "models/PaperTest1.obj", "models/basketball.jpg");

}

函数draw（...）定义了如何将3d模型放置在真实世界空间中：

      public void draw(
      float[] viewMatrix,
      float[] projectionMatrix,
      AugmentedImage augmentedImage,
      Anchor centerAnchor,
      float[] colorCorrectionRgba) {
    float[] tintColor =
     convertHexToColor(TINT_COLORS_HEX[augmentedImage.getIndex() % TINT_COLORS_HEX.length]);

Pose[] localBoundaryPoses = {
  Pose.makeTranslation(
      -0.5f * augmentedImage.getExtentX(),
      0.0f,
      -0.5f * augmentedImage.getExtentZ()), // upper left
  Pose.makeTranslation(
      0.5f * augmentedImage.getExtentX(),
      0.02f,
      -0.5f * augmentedImage.getExtentZ()), // upper right
  Pose.makeTranslation(
      0.5f * augmentedImage.getExtentX(),
      0.0f,
      0.5f * augmentedImage.getExtentZ()), // lower right
  Pose.makeTranslation(
      -0.5f * augmentedImage.getExtentX(),
      0.0f,
      0.5f * augmentedImage.getExtentZ()) // lower left
};

Pose anchorPose = centerAnchor.getPose();
Pose[] worldBoundaryPoses = new Pose[4];
for (int i = 0; i < 4; ++i) {
  worldBoundaryPoses[i] = anchorPose.compose(localBoundaryPoses[i]);
}

float scaleFactor = 1.0f;
float[] modelMatrix = new float[16];

worldBoundaryPoses[0].toMatrix(modelMatrix, 0);
corkboardObj.updateModelMatrix(modelMatrix, scaleFactor);
corkboardObj.draw(viewMatrix, projectionMatrix, colorCorrectionRgba, tintColor);

if (showPaper) {
  worldBoundaryPoses[1].toMatrix(modelMatrix, 0);
  paper.updateModelMatrix(modelMatrix, 0.05f);
  paper.draw(viewMatrix, projectionMatrix, colorCorrectionRgba, tintColor);
}

 }

添加了一段代码，让用户在触摸事件的主要活动中从照片库中进行选择：

    @Override
    public boolean onTouchEvent(MotionEvent event) {
    //augmentedImageRenderer.drawPaper();
    AlertDialog.Builder pictureDialog = new AlertDialog.Builder(this);
    pictureDialog.setTitle("Select Action:");
    String[] pictureDialogItems = {
        "Select photo from gallery",
        "Capture photo from camera" };

pictureDialog.setItems(pictureDialogItems, new DialogInterface.OnClickListener() {
  @Override
  public void onClick(DialogInterface dialog, int which) {
    switch (which){
      case 0:
        choosePhotoFromGallary();
        break;
      case 1:
        takePhotoFromCamera();
        break;
    }
  }
});
pictureDialog.show();
return super.onTouchEvent(event);
}
 functions called when user action captured:


public void choosePhotoFromGallary(){
    Intent galleryIntent = new Intent(Intent.ACTION_PICK,
            MediaStore.Images.Media.EXTERNAL_CONTENT_URI);

    startActivityForResult(galleryIntent, GALLERY); 
}

  private void takePhotoFromCamera() {
  Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(cameraIntent, CAMERA);
}


 @Override
 public void onSurfaceChanged(GL10 gl, int width, int height) {
   displayRotationHelper.onSurfaceChanged(width, height);
   GLES20.glViewport(0, 0, width, height);
 }

//activity result for receiveing data
 @Override
 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
   super.onActivityResult(requestCode, resultCode, data);


if (resultCode == this.RESULT_CANCELED) {
  return;
}
if (requestCode == GALLERY) {

  if (data != null) {
    Uri contentURI = data.getData();
    try {
      Bitmap bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), contentURI);
      String path = saveImage(bitmap);

      augmentedImageRenderer.drawPaper();
    } catch (IOException e) {
      e.printStackTrace();

    }
  }
} else if (requestCode == CAMERA) {
  Bitmap thumbnail = (Bitmap) data.getExtras().get("data");
  saveImage(thumbnail);

  }
}

我的问题是：

public void createOnGlThread（Context context）

在代码中，它只识别要传递的本机路径（例如models / XXX.jpg），它适用于app文件夹内的路径。该代码不适用于从电话传入的absoulute路径（例如resources / media / photo / XXX.jpg）抛出错误。外部读写权限已添加到清单文件中。

Android Studio增强图片生成路径错误

0 个答案: