Android通过身份验证将Imageview图像发送到Firebase

Question

我有一个ImageButton，一个ImageView和一个名为submit的按钮。 每当我们点击ImageButton时相机意图打开，我们拍摄一下然后显示给ImageView。一切正常，直到这里很好。那么如何通过身份验证将此摄像头的Intent图像上传到Firebase。 我无法找到任何认为我们的教程视频

package com.example.android.besafe;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.media.Image;
import android.net.Uri;
import android.os.storage.StorageManager;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.Toast;

import com.google.android.gms.tasks.OnSuccessListener;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.storage.FirebaseStorage;
import com.google.firebase.storage.StorageReference;
import com.google.firebase.storage.UploadTask;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

public class CameraActivity extends AppCompatActivity {
    private ImageButton mProfileImage;
    private ImageView imageview;
    private FirebaseAuth mAuth;
    private DatabaseReference mCustomerDatabase;
    private String userID;
    private String mProfileImageUrl;
    private Button confirm;
    private Uri resultUri;
    private static final int CAMERA_REQUEST_CODE = 1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_camera);

        mProfileImage = (ImageButton) findViewById(R.id.btnselect);
        confirm = (Button) findViewById(R.id.btnsubmit);
        imageview = (ImageView) findViewById(R.id.imageview);

        mAuth = FirebaseAuth.getInstance();
        userID = mAuth.getCurrentUser().getUid();
        mCustomerDatabase = FirebaseDatabase.getInstance().getReference().child("Users").child("fbusersinfo").child(userID);

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

            }
        });

        confirm.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {


                //saveUserInformation();
            }
        });

    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if(requestCode == CAMERA_REQUEST_CODE && resultCode == Activity.RESULT_OK){
             //Uri imageUri = data.getData();
             //StorageReference filePath = FirebaseStorage.getInstance().getReference().child("profile_images").child(userID);

            Bitmap bitmap = (Bitmap)data.getExtras().get("data");
            imageview.setImageBitmap(bitmap);


            /* resultUri = imageUri;
            mProfileImage.setImageURI(resultUri);
            */
        }
    }

  /*  private void saveUserInformation() {
        if(resultUri != null) {

            StorageReference filePath = FirebaseStorage.getInstance().getReference().child("profile_images").child(userID);

            Bitmap bitmap = null;
            try {
                bitmap = MediaStore.Images.Media.getBitmap(getApplication().getContentResolver(), resultUri);

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

            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            bitmap.compress(Bitmap.CompressFormat.JPEG, 20, baos);
            byte[] data = baos.toByteArray();
            UploadTask uploadTask = filePath.putBytes(data);

            uploadTask.addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
                @Override
                public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
                    Uri downloadUrl = taskSnapshot.getDownloadUrl();

                    Map newImage = new HashMap();
                    newImage.put("profileImageUrl", downloadUrl.toString());
                    mCustomerDatabase.updateChildren(newImage);

                    finish();
                    return;
                }
            });
        }
        else{finish();}

    }  */




}

Answer 1

以下是Firebase存储上传方法

您必须将位图转换为File，然后您可以检索URI并将其传递给我的方法

 private void uploadMethod() {
        progressDialog();
        FirebaseStorage firebaseStorage = FirebaseStorage.getInstance();
        StorageReference storageReferenceProfilePic = firebaseStorage.getReference();
        StorageReference imageRef = storageReferenceProfilePic.child("Your Path" + "/" + "Image Name" + ".jpg");

        imageRef.putFile(imageUri)
                .addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
                    @Override
                    public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
                        //if the upload is successful
                        //hiding the progress dialog
                        //and displaying a success toast
                        dismissDialog();
                        String profilePicUrl = taskSnapshot.getDownloadUrl().toString();
                    }
                })
                .addOnFailureListener(new OnFailureListener() {
                    @Override
                    public void onFailure(@NonNull Exception exception) {
                        //if the upload is not successful
                        //hiding the progress dialog
                        dismissDialog();
                        //and displaying error message
                        Toast.makeText(getActivity(), exception.getCause().getLocalizedMessage(), Toast.LENGTH_LONG).show();
                    }
                })
                .addOnProgressListener(new OnProgressListener<UploadTask.TaskSnapshot>() {
                    @Override
                    public void onProgress(UploadTask.TaskSnapshot taskSnapshot) {
                        //calculating progress percentage
//                        double progress = (100.0 * taskSnapshot.getBytesTransferred()) / taskSnapshot.getTotalByteCount();
//                        //displaying percentage in progress dialog
//                        progressDialog.setMessage("Uploaded " + ((int) progress) + "%...");
                    }
                });

    }

您可以从ImageView中检索您的图像

public byte[] getByteArray(ImageView imageView){
        // Get the data from an ImageView as bytes
        imageView.setDrawingCacheEnabled(true);
        imageView.buildDrawingCache();
        Bitmap bitmap = imageView.getDrawingCache();
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos);
        byte[] data = baos.toByteArray();
        return data;
    }

改变我的方法：

imageRef.putBytes(getByteArray)