我正在尝试将从相机拍摄的图像上传到 firebase 存储，出现一个消息对话框，但它一直在充电，并且没有图像上传到存储。 另外我想知道，如何取回特定用户发送的图像？我应该给图像提供图像的用户名，这样我就可以用他的名字取回它吗？
public class ProfileActivity extends AppCompatActivity {
public static final int CAMERA_REQUEST = 10;
private LocationService service;
private Button uploadbtn;
private ImageView imgSpecimentPhoto;
private ImageView imgSpecimentPhoto2;
private ImageView imgSpecimentPhoto3;
private StorageReference storage;
private ProgressDialog mProgress;
Uri photoURI;
String mCurrentPhotoPath;
private File createImageFile() throws IOException{
//Create an image file name
String timeStamp = new SimpleDateFormat( "yyyyMMdd_HHmmss" ).format( new Date());
String imageFileName = "JPEG_" + timeStamp + "_.";
File storageDir = getExternalFilesDir( Environment.DIRECTORY_PICTURES );
File image = File.createTempFile(
imageFileName,
".jpg",
storageDir
);
mCurrentPhotoPath = image.getAbsolutePath();
return image;
}
private void dispatchTakePictureIntent(){
Intent takePictureIntent = new Intent (MediaStore.ACTION_IMAGE_CAPTURE);
if(takePictureIntent.resolveActivity( getPackageManager())!= null){
//Create the file where the photo should go
File photoFile = null;
try{
photoFile = createImageFile();
}catch (IOException ex){
System.out.println("error taking the pic");
}
//Continue only if the file was successfull
if(photoFile != null){
photoURI = FileProvider.getUriForFile( this, "com.example.android.fileprovider",photoFile);
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
startActivityForResult( takePictureIntent, CAMERA_REQUEST );
}
}
}
private View currentView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_profile );
service = new LocationService(this);
uploadbtn = (Button) findViewById(R.id.upload);
storage = FirebaseStorage.getInstance().getReference();
mProgress = new ProgressDialog( this );
//get access to the image view
imgSpecimentPhoto = findViewById(R.id.camerabtn);
imgSpecimentPhoto2 = findViewById(R.id.camerabtn5 );
imgSpecimentPhoto3 = findViewById(R.id.camerabtn6);
uploadbtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mProgress.setMessage("Uploading...");
mProgress.show();
dispatchTakePictureIntent();
}
} );
}
public void checkPermission() {
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED ||
ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED
) {//Can add more as per requirement
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION},
123);
}
}
public void btnTakePhotoClicked(View v) {
Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(cameraIntent, CAMERA_REQUEST);
System.out.println("first");
currentView= v;
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
photoURI = data.getData();
//did the user chose okay
if(requestCode == CAMERA_REQUEST && resultCode == RESULT_OK){
//we are hearing back grom the camera
Bitmap cameraImage = (Bitmap) data.getExtras().get( "data" );
//now we have the image
ImageView cur = (ImageView) currentView;
cur.setImageBitmap( cameraImage );
if (cur.getId() == imgSpecimentPhoto.getId()) {
imgSpecimentPhoto2.setVisibility( View.VISIBLE );
}
if (cur.getId() == imgSpecimentPhoto2.getId()) {
imgSpecimentPhoto3.setVisibility( View.VISIBLE );
StorageReference filepath = storage.child("Photos").child( photoURI.getLastPathSegment());
filepath.putFile( photoURI).addOnSuccessListener( new OnSuccessListener<UploadTask.TaskSnapshot>() {
@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
Toast.makeText(ProfileActivity.this, "Upload Successfull", Toast.LENGTH_SHORT).show();
mProgress.dismiss();
}
} ).addOnFailureListener( new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
Toast.makeText( ProfileActivity.this, "Upload Failed", Toast.LENGTH_SHORT).show();
}
} );
}
}
}}
最佳答案
当使用以下代码在 Firebase 上上传图片时......
bearImage.setDrawingCacheEnabled(true);
bearImage.buildDrawingCache();
Bitmap bitmap = bearImage.getDrawingCache();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos);
byte[] data = baos.toByteArray();
// Upload it to our reference
UploadTask uploadTask = bearRef.putBytes(data);
buttonDownload.setEnabled(false);
uploadTask.addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception exception) {
// Handle unsuccessful uploads
progressDialog.dismiss();
Log.w(LOG_TAG, "Upload failed: " + exception.getMessage());
}
}).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
// taskSnapshot.getMetadata() contains file metadata such as size, content-type, and download URL.
Uri downloadUrl = taskSnapshot.getDownloadUrl();
progressDialog.dismiss();
Log.d(LOG_TAG, "Download Url: " + downloadUrl);
buttonDownload.setEnabled(true);
}
});
删除上面代码中不需要的代码..
关于java - 将图像上传到 Firebase 存储，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/49557184/