我正在创建一个用于识别地标的应用程序。 识别出图像后，结果应为onSuccess，但结果为onFailure。
以下消息显示在日志中：
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我需要做什么？
公共类RecognizeLandmarks扩展了AppCompatActivity {
EditText mResultEt;
ImageView mPreviewIv;
TextView tvLName, tvLiD, tvLConfidence, tvLlatitude, tvLlongitude;
public static final int CAMERA_REQUEST_CODE = 200;
public static final int STORAGE_REQUEST_CODE = 400;
public static final int IMAGE_PIC_GALLERY_CODE = 1000;
public static final int IMAGE_PIC_CAMERA_CODE = 1001;
private static final String TAG = "MyLog";
String cameraPermission[];
String storagePermission[];
Uri image_uri;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_recognize_landmarks);
androidx.appcompat.app.ActionBar actionBar = getSupportActionBar();
actionBar.setSubtitle("Click image button to insert Image");
mResultEt = findViewById(R.id.resultEt);
mPreviewIv = findViewById(R.id.imageIv);
tvLName = findViewById(R.id.tvLName);
tvLiD = findViewById(R.id.tvLiD);
tvLConfidence = findViewById(R.id.tvLConfidence);
tvLlatitude = findViewById(R.id.tvLlatitude);
tvLlongitude = findViewById(R.id.tvLlongitude);
//camera permission
cameraPermission = new String[]{Manifest.permission.CAMERA,
Manifest.permission.WRITE_EXTERNAL_STORAGE};
//storage permission
storagePermission = new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE};
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
//inflate menu
getMenuInflater().inflate(R.menu.menu_recognize_text, menu);
return true;
}
//handle actionbar item clicks
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId( );
if (id == R.id.addImage) {
showImageImportDialog( );
}
if (id == R.id.settings) {
Toast.makeText(this, "Settings", Toast.LENGTH_SHORT).show( );
}
return super.onOptionsItemSelected(item);
}
private void showImageImportDialog() {
// items to display in dialog
String[] items = {" Camera", " Gallery"};
AlertDialog.Builder dialog = new AlertDialog.Builder(this);
dialog.setTitle("Select Image");
dialog.setItems(items, new DialogInterface.OnClickListener( ) {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
if (i == 0) {
//camera option clicked
/*for os Marshmallow and above we need to ask runtime permission for camera and storage*/
if (!checkCameraPermission()) {
//camera permission not allowed, request it
requestCameraPermission();
} else {
//permission allowed, take picture
pickCamera();
}
}
if (i == 1) {
//gallery option clicked
if (!checkStoragePermission()) {
//storage permission not allowed, request it
requestStoragePermission();
} else {
//permission allowed, take picture
pickGallery();
}
}
}
});
dialog.create().show();
}
private void pickGallery() {
//intent to pick image from gallery
Intent intent = new Intent(Intent.ACTION_PICK);
//set intent type to image
intent.setType("image/*");
startActivityForResult(intent, IMAGE_PIC_GALLERY_CODE);
}
private void pickCamera() {
//intent to take image from camera, it will also be save to storage to get high quality image
ContentValues values = new ContentValues( );
values.put(MediaStore.Images.Media.TITLE, "NewPic"); //title of the picture
values.put(MediaStore.Images.Media.DESCRIPTION, "Image to text"); //description
image_uri = getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, image_uri);
startActivityForResult(cameraIntent, IMAGE_PIC_CAMERA_CODE);
}
private void requestStoragePermission() {
ActivityCompat.requestPermissions(this, storagePermission, STORAGE_REQUEST_CODE);
}
private boolean checkStoragePermission() {
boolean result = ContextCompat.checkSelfPermission(this,
Manifest.permission.WRITE_EXTERNAL_STORAGE) == (PackageManager.PERMISSION_GRANTED);
return result;
}
private void requestCameraPermission() {
ActivityCompat.requestPermissions(this, cameraPermission, CAMERA_REQUEST_CODE);
}
private boolean checkCameraPermission() {
/*Check camera permission and return the result
* in order to get high quality image we have to save image to external storage first
* before inserting to image view that`s why storage permission will also be required */
boolean result = ContextCompat.checkSelfPermission(this,
Manifest.permission.CAMERA) == (PackageManager.PERMISSION_GRANTED);
boolean result1 = ContextCompat.checkSelfPermission(this,
Manifest.permission.WRITE_EXTERNAL_STORAGE) == (PackageManager.PERMISSION_GRANTED);
return result && result1;
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
switch (requestCode) {
case CAMERA_REQUEST_CODE:
if (grantResults.length > 0) {
boolean cameraAccepted = grantResults[0] ==
PackageManager.PERMISSION_GRANTED;
boolean writeStorageAccepted = grantResults[0] ==
PackageManager.PERMISSION_GRANTED;
if (cameraAccepted && writeStorageAccepted) {
pickCamera();
} else {
Toast.makeText(this, "permission denied", Toast.LENGTH_SHORT).show( );
}
}
break;
case STORAGE_REQUEST_CODE:
if (grantResults.length > 0) {
boolean writeStorageAccepted = grantResults[0] ==
PackageManager.PERMISSION_GRANTED;
if (writeStorageAccepted) {
pickGallery( );
}
else {
Toast.makeText(this, "permission denied", Toast.LENGTH_SHORT).show( );
}
}
break;
}
}
@Override
public void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
//got image from camera or gallery
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
if (requestCode == IMAGE_PIC_GALLERY_CODE) {
//got image from gallery now crop it
CropImage.activity(data.getData( ))
.setGuidelines(CropImageView.Guidelines.ON) // enable image guidelines
.start(this);
}
if (requestCode == IMAGE_PIC_CAMERA_CODE) {
//got image from camera crop it
CropImage.activity(image_uri)
.setGuidelines(CropImageView.Guidelines.ON) // enable image guidelines
.start(this);
}
}
//get cropped image
if (requestCode == CropImage.CROP_IMAGE_ACTIVITY_REQUEST_CODE) {
CropImage.ActivityResult result1 = CropImage.getActivityResult(data);
if (resultCode == RESULT_OK) {
Uri resultUri = result1.getUri( ); // get image uri
//set image to image view
mPreviewIv.setImageURI(resultUri);// past image in iV
//get drawable bitmap for text recognition
BitmapDrawable bitmapDrawable = (BitmapDrawable) mPreviewIv.getDrawable( );
Bitmap bitmap = bitmapDrawable.getBitmap( );
FirebaseVisionImage image = FirebaseVisionImage.fromBitmap(bitmap);
FirebaseVisionCloudDetectorOptions options =
new FirebaseVisionCloudDetectorOptions.Builder( )
.setModelType(FirebaseVisionCloudDetectorOptions.LATEST_MODEL)
.setMaxResults(15)
.build( );
FirebaseVisionCloudLandmarkDetector detector = FirebaseVision.getInstance( )
.getVisionCloudLandmarkDetector(options);
Task<List<FirebaseVisionCloudLandmark>> result = detector.detectInImage(image)
.addOnSuccessListener(new OnSuccessListener<List<FirebaseVisionCloudLandmark>>( ) {
@Override
public void onSuccess(List<FirebaseVisionCloudLandmark> firebaseVisionCloudLandmarks) {
// Task completed successfully
// ...
for(FirebaseVisionCloudLandmark landmark : firebaseVisionCloudLandmarks) {
//Rect bounds = landmark.getBoundingBox();
String landmarkName = landmark.getLandmark( );
tvLName.setText(landmarkName);
String entityId = landmark.getEntityId( );
tvLiD.setText(entityId);
float confidence = landmark.getConfidence( );
tvLConfidence.setText(Float.toString(confidence));
// Multiple locations are possible, e.g., the location of the depicted
// landmark and the location the picture was taken.
for(FirebaseVisionLatLng loc : landmark.getLocations( )) {
double latitude = loc.getLatitude( );
tvLlatitude.setText(Double.toString(latitude));
double longitude = loc.getLongitude( );
tvLlongitude.setText(Double.toString(longitude));
}
}
}
})
.addOnFailureListener(new OnFailureListener( ) {
@Override
public void onFailure(@NonNull Exception e) {
// Task failed with an exception
// ...
Log.d(TAG,e.getMessage());
Toast.makeText(RecognizeLandmarks.this, "Recognizing Failed", Toast.LENGTH_SHORT).show( );
}
});
} else if (resultCode == CropImage.CROP_IMAGE_ACTIVITY_RESULT_ERROR_CODE) {
//if there is any error show it
Exception error = result1.getError( );
Toast.makeText(this, "" + error, Toast.LENGTH_SHORT).show( );
}
}
}
}
D / MyLog：如果您尚未设置结算信息，请转到Firebase控制台设置结算信息：https://firebase.corp.google.com/u/0/project/_/overview?purchaseBillingPlan=true。如果您指定调试Api Key替代项并打开了Api Key限制，请确保正确设置了限制
答案 0 :(得分：1)
ML Kit的地标检测功能无法在设备本身上运行，而是使用Google Cloud Vision。因此，在使用地标检测之前，您的项目需要处于付费计划中。前1000个通话免费，之后将向您收取其他通话的费用。
