Wie erhalte ich die Firebase-Download-URL des hochgeladenen Bildes?

Question

Ich verwende diesen Code unten, um ein Bild in Firebase-Speicher hochzuladen, aber wenn das Bild hochgeladen wird, möchte ich in der Lage sein, das Bild mithilfe der Download-URL aufzurufen. Ist das möglich?

ViewUserMapActivity

package uk.co.jaunt_app.jaunt; 

import android.app.ProgressDialog; 
import android.content.Intent; 
import android.graphics.Bitmap; 
import android.location.Location; 
import android.net.Uri; 
import android.os.Bundle; 
import android.provider.MediaStore; 
import android.support.annotation.NonNull; 
import android.support.v4.app.FragmentActivity; 
import android.view.View; 
import android.widget.Button; 
import android.widget.ImageView; 
import android.widget.TextView; 
import android.widget.Toast; 

import com.google.android.gms.maps.CameraUpdateFactory; 
import com.google.android.gms.maps.GoogleMap; 
import com.google.android.gms.maps.OnMapReadyCallback; 
import com.google.android.gms.maps.SupportMapFragment; 
import com.google.android.gms.maps.model.BitmapDescriptorFactory; 
import com.google.android.gms.maps.model.LatLng; 
import com.google.android.gms.maps.model.MapStyleOptions; 
import com.google.android.gms.maps.model.MarkerOptions; 
import com.google.android.gms.tasks.OnFailureListener; 
import com.google.android.gms.tasks.OnSuccessListener; 
import com.google.firebase.storage.FirebaseStorage; 
import com.google.firebase.storage.StorageReference; 
import com.google.firebase.storage.UploadTask; 

import java.util.UUID; 

import static uk.co.jaunt_app.jaunt.R.id.MapDistance; 
import static uk.co.jaunt_app.jaunt.R.id.map; 

public class ViewUserMapActivity extends FragmentActivity implements OnMapReadyCallback { 

    private GoogleMap mMap; 
    Button HomeButt; 
    TextView MapName; 
    TextView MapStartLocLat; 
    TextView MapStartLocLong; 
    TextView MapEndLocLat; 
    TextView MapEndLocLong; 
    TextView mapDistance; 
    Button chooseImg, uploadImg; 
    ImageView imgView; 
    int PICK_IMAGE_REQUEST = 111; 
    Uri filePath; 
    ProgressDialog pd; 
    TextView imgUrl; 

    FirebaseStorage storage = FirebaseStorage.getInstance(); 
    StorageReference storageRef = storage.getReferenceFromUrl("gs://jaunt-ddc86.appspot.com/"); 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_view_user_map); 
     SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager() 
       .findFragmentById(map); 
     mapFragment.getMapAsync(this); 

     HomeButt = (Button) findViewById(R.id.backHome); 
     MapName = (TextView) findViewById(R.id.MapName); 
     MapStartLocLat = (TextView) findViewById(R.id.MapStartLocLat); 
     MapStartLocLong = (TextView) findViewById(R.id.MapStartLocLong); 
     MapEndLocLat = (TextView) findViewById(R.id.MapEndLocLat); 
     MapEndLocLong = (TextView) findViewById(R.id.MapEndLocLong); 
     mapDistance = (TextView) findViewById(MapDistance); 
     imgUrl = (TextView) findViewById(R.id.imgurl); 

     Intent intent = getIntent(); 
     final String mapName = intent.getStringExtra("mapName"); 
     String mapStartLat = intent.getStringExtra("mapStartLat"); 
     String mapStartLong = intent.getStringExtra("mapStartLong"); 
     String mapEndLat = intent.getStringExtra("mapEndLat"); 
     String mapEndLong = intent.getStringExtra("mapEndLong"); 
     MapName.setText(mapName); 
     MapStartLocLat.setText(mapStartLat); 
     MapStartLocLong.setText(mapStartLong); 
     MapEndLocLat.setText(mapEndLat); 
     MapEndLocLong.setText(mapEndLong); 


     chooseImg = (Button)findViewById(R.id.chooseImg); 
     uploadImg = (Button)findViewById(R.id.uploadImg); 
     imgView = (ImageView)findViewById(R.id.imgView); 

     pd = new ProgressDialog(this); 
     pd.setMessage("Uploading...."); 


     chooseImg.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       Intent intent = new Intent(); 
       intent.setType("image/*"); 
       intent.setAction(Intent.ACTION_PICK); 
       startActivityForResult(Intent.createChooser(intent, "Select Image"), PICK_IMAGE_REQUEST); 
      } 
     }); 

     uploadImg.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       if(filePath != null) { 
        pd.show(); 
        String imageID = UUID.randomUUID().toString(); 
        StorageReference childRef = storageRef.child(imageID); 

        //uploading the image 
        UploadTask uploadTask = childRef.putFile(filePath); 

        uploadTask.addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() { 
         @Override 
         public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) { 
          pd.dismiss(); 
          Toast.makeText(ViewUserMapActivity.this, "Image Uploaded Successfully", Toast.LENGTH_LONG).show(); 
         } 

        }).addOnFailureListener(new OnFailureListener() { 
         @Override 
         public void onFailure(@NonNull Exception e) { 
          pd.dismiss(); 
          Toast.makeText(ViewUserMapActivity.this, "Upload Failed -> " + e, Toast.LENGTH_LONG).show(); 
         } 
        }); 

       } 
       else { 
        Toast.makeText(ViewUserMapActivity.this, "Select An Image", Toast.LENGTH_LONG).show(); 
       } 
      } 
     }); 
    } 



    @Override 
    protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
     super.onActivityResult(requestCode, resultCode, data); 

     if (requestCode == PICK_IMAGE_REQUEST && resultCode == RESULT_OK && data != null && data.getData() != null) { 
      filePath = data.getData(); 

      try { 
       //getting image from gallery 
       Bitmap bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), filePath); 
       //Setting image to ImageView 
       imgView.setImageBitmap(bitmap); 
      } catch (Exception e) { 
       e.printStackTrace(); 
      } 
     } 

    } 


    @Override 
    public void onMapReady(GoogleMap googleMap) { 
     mMap = googleMap; 
     googleMap.setMapStyle(MapStyleOptions.loadRawResourceStyle(this, R.raw.style_json)); 

     String mapstartlat = MapStartLocLat.getText().toString().trim(); 
     String mapstartlong = MapStartLocLong.getText().toString().trim(); 
     String mapendlat = MapEndLocLat.getText().toString().trim(); 
     String mapendlong = MapEndLocLong.getText().toString().trim(); 

     double startlat = Double.valueOf(mapstartlat); 
     double startlong = Double.valueOf(mapstartlong); 
     double endlat = Double.valueOf(mapendlat); 
     double endlong = Double.valueOf(mapendlong); 

     LatLng Start = new LatLng(startlat, startlong); 
     LatLng End = new LatLng(endlat, endlong); 
     mMap.addMarker(new MarkerOptions().position(Start) 
       .icon(BitmapDescriptorFactory.fromResource(R.drawable.mappin))); 
     mMap.addMarker(new MarkerOptions().position(End) 
       .icon(BitmapDescriptorFactory.fromResource(R.drawable.mappin))); 
     mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(End, 6)); 

     Location loc1 = new Location(""); 
     loc1.setLatitude(startlat); 
     loc1.setLongitude(startlong); 

     Location loc2 = new Location(""); 
     loc2.setLatitude(endlat); 
     loc2.setLongitude(endlong); 

     float distanceInMeters = loc1.distanceTo(loc2); 
     Double value = 0.00062137; 
     Double distanceValue = (distanceInMeters)*value; 
     mapDistance.setText(String.format("%.1f mi", distanceValue)); 

     HomeButt.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       Intent intent = new Intent(ViewUserMapActivity.this, MainActivity.class); 
       startActivity(intent); 
      } 
     }); 

    } 

} 

Answer 1

Verwenden getDownloadUrl() in Ihrem Erfolg Rückruf. Es ist gefüllt, sobald der Upload abgeschlossen ist.

Weitere Informationen here.

Answer 2

Vom Firebase documentation on uploading a local file:

Sie können auf dem Gerät lokale Dateien hochladen, wie Fotos und Videos von der Kamera, mit der putFile() Methode. putFile() nimmt eine Datei und gibt eine UploadTask zurück, mit der Sie den Status des Uploads verwalten und überwachen können.

Uri file = Uri.fromFile(new File("path/to/images/rivers.jpg")); 
StorageReference riversRef = storageRef.child("images/"+file.getLastPathSegment()); 
uploadTask = riversRef.putFile(file); 

// Register observers to listen for when the download is done or if it fails 
uploadTask.addOnFailureListener(new OnFailureListener() { 
    @Override 
    public void onFailure(@NonNull Exception exception) { 
     // Handle unsuccessful uploads 
    } 
}).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(); 
    } 
});