如何設置圖片上傳按鈕？

Question

我想構建這個應用程序，您可以從相機或畫廊中選擇一張照片。此圖片未設置爲ImageView。現在，我如何使用uploadbutton構建OnClickListener，將圖片上傳到Firebase？

public class MainActivity extends AppCompatActivity { 

private StorageReference mStorage; 
private static final int GALLERY_INTENT = 2; 
private ImageButton mCamera; 
private ImageButton mGallery; 
private ImageView mImageview; 
private static final int CAMERA_REQUEST_CODE = 1; 
private ImageButton mUpload; 


@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 

    mStorage = FirebaseStorage.getInstance().getReference(); 
    mGallery = (ImageButton) findViewById(R.id.UpGallery); 

    mUpload = (ImageButton) findViewById(R.id.UpImage); 

    mCamera = (ImageButton) findViewById(R.id.UpCamera); 
    mImageview = (ImageView) findViewById(R.id.imageView1); 
    mImageview.buildDrawingCache(); 
    mImageview.setDrawingCacheEnabled(true); 
    mImageview.buildDrawingCache(); 




    final String dir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES) + "/picFolder/"; 
    File newdir = new File(dir); 
    newdir.mkdirs(); 


    mGallery.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      Intent intent = new Intent(Intent.ACTION_PICK); 
      intent.setType("image/*"); 
      startActivityForResult(intent, GALLERY_INTENT); 
     } 
    }); 

    mCamera.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      Intent intent1 = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
      startActivityForResult(intent1, CAMERA_REQUEST_CODE); 
     } 
    }); 

    mUpload.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 


       } 

    }); 
} 

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

    if (requestCode == GALLERY_INTENT && resultCode == RESULT_OK){ 

     final Uri uri = data.getData(); 
       Picasso.with(MainActivity.this).load(uri).fit().centerCrop().into(mImageview); 

    } 


    if (requestCode == CAMERA_REQUEST_CODE && resultCode == RESULT_OK){ 
     Bitmap photo = (Bitmap) data.getExtras().get("data"); 
     mImageview.setImageBitmap(photo); 

     Uri uri1 = data.getData(); 

       Picasso.with(MainActivity.this).load(uri1).fit().centerCrop().into(mImageview); 



    } 
    } 


} 

Answer 1

final StorageReference storageRef = FirebaseStorage.getInstance().getReferenceFromUrl("gs://{your-storage-name-from-firebase}.appspot.com"); 

    mImageview.setDrawingCacheEnabled(true); 
    mImageview.buildDrawingCache(); 
    Bitmap bitmap = mImageview .getDrawingCache(); 

    ByteArrayOutputStream baas = new ByteArrayOutputStream(); 
    bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baas); 

    byte[] data = baas.toByteArray(); 

    UploadTask uploadTask = storageRef.child("{image-folder}").child("unique-id-image").putBytes(data); 

    uploadTask.addOnFailureListener(new OnFailureListener() { 
     @Override 
     public void onFailure(@NonNull Exception exception) { 
      Toast.makeText(MainActivity.this, "Picture upload failed", Toast.LENGTH_LONG).show(); 
     } 
    }).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() { 
     @Override 
     public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) { 
      String downloadUrl = taskSnapshot.getDownloadUrl(); 
     } 
    }); 

希望這有助於。