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java - 我需要从 fireabse 调用数据

问题描述

我没有收到错误，但我想打印用户在上面的活动中选择的值，并且图像确实成功显示在 firebase 存储中，但它不会在图像视图中打印。我该如何解决这个问题。这是我的代码

package tech.ahawebsolutions.ahachatsandcalling;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;

import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Toast;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.android.material.bottomnavigation.BottomNavigationView;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ValueEventListener;
import com.google.firebase.storage.FirebaseStorage;
import com.google.firebase.storage.StorageReference;
import com.google.firebase.storage.UploadTask;
import com.squareup.picasso.Picasso;
import com.theartofdev.edmodo.cropper.CropImage;
import com.theartofdev.edmodo.cropper.CropImageView;

import java.io.InputStream;
import java.util.HashMap;


public class SettingsActivity extends AppCompatActivity {

    private Button UpdateAccountSettings, logoutbutton;
    private EditText userName, userStatus;
    private ImageView userProfileImage, userProfileImage1;
    private String currentUserID;
    private FirebaseAuth mAuth;
    private DatabaseReference RootRef;
    private StorageReference userProfileImagesRef;
    private static final int GalleryPick = 1;

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

        logoutbutton = (Button) findViewById(R.id.logoutbutton);

        mAuth = FirebaseAuth.getInstance();
        currentUserID = mAuth.getCurrentUser().getUid();
        RootRef = FirebaseDatabase.getInstance().getReference();
        userProfileImagesRef = FirebaseStorage.getInstance().getReference().child("Profile Images");


        userProfileImage = (ImageView) findViewById(R.id.set_profile_image);
        userProfileImage1 = (ImageView) findViewById(R.id.set_profile_image1);
        
        InitializeFields();

        userName.setVisibility(View.INVISIBLE);

        UpdateAccountSettings.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view)
            {
                UpdateSettings();
            }
        });
        RetrieveUserInfo();

        logoutbutton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                mAuth.signOut();
                startActivity(new Intent(getApplicationContext(), LoginActivity.class));


            }
        });
        userProfileImage.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view)
            {
                Intent galleryIntent = new Intent();
                galleryIntent.setAction(Intent.ACTION_GET_CONTENT);
                galleryIntent.setType("image/*");
                startActivityForResult(galleryIntent, GalleryPick);

            }
        });
    }



    private void UpdateSettings()
    {
        String setUserName = userName.getText().toString();
        String setUserStatus = userStatus.getText().toString();

        if (TextUtils.isEmpty(setUserName))
        {
            Toast.makeText(this, "Please enter username", Toast.LENGTH_SHORT).show();
        }
        if (TextUtils.isEmpty(setUserStatus))
        {
            Toast.makeText(this, "Please enter your status", Toast.LENGTH_SHORT).show();
        }
        else
        {
            HashMap<String, String> profileMap = new HashMap<>();
            profileMap.put("uid", currentUserID);
            profileMap.put("name", setUserName);
            profileMap.put("status", setUserStatus);

            RootRef.child("Users").child(currentUserID).setValue(profileMap).addOnCompleteListener(new OnCompleteListener<Void>() {
                @Override
                public void onComplete(@NonNull Task<Void> task)
                {
                    if (task.isSuccessful())
                    {
                        Toast.makeText(SettingsActivity.this, "Profile updated successfully", Toast.LENGTH_SHORT).show();
                        SendUserToMainActivity();
                    }
                    else
                    {
                        String message = task.getException().toString();
                        Toast.makeText(SettingsActivity.this, "Error :" + message, Toast.LENGTH_SHORT).show();
                    }
                }
            });

        }
    }

    private void InitializeFields()
    {
        UpdateAccountSettings = (Button) findViewById(R.id.update_settings_button);
        userName = (EditText) findViewById(R.id.set_user_name);
        userStatus = (EditText) findViewById(R.id.set_profile_status);
        userProfileImage = (ImageView) findViewById(R.id.set_profile_image);
    }

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

        if (requestCode==GalleryPick  &&  resultCode==RESULT_OK  &&  data!=null)
        {
            Uri ImageUri = data.getData();

            CropImage.activity()
                    .setGuidelines(CropImageView.Guidelines.ON)
                    .setAspectRatio(1, 1)
                    .start(this);
        }

        if (requestCode == CropImage.CROP_IMAGE_ACTIVITY_REQUEST_CODE)
        {
            CropImage.ActivityResult result = CropImage.getActivityResult(data);

            if (resultCode == RESULT_OK)
            {

                Uri resultUri = result.getUri();


                StorageReference filePath = userProfileImagesRef.child(currentUserID + ".jpg");

                filePath.putFile(resultUri).addOnCompleteListener(new OnCompleteListener<UploadTask.TaskSnapshot>() {
                    @Override
                    public void onComplete(@NonNull Task<UploadTask.TaskSnapshot> task)
                    {
                        if (task.isSuccessful())
                        {
                            Toast.makeText(SettingsActivity.this, "Profile Image uploaded Successfully...", Toast.LENGTH_SHORT).show();

                            final String downloaedUrl = task.getResult().getStorage().getDownloadUrl().toString();

                            RootRef.child("Users").child(currentUserID).child("image")
                                    .setValue(downloaedUrl)
                                    .addOnCompleteListener(new OnCompleteListener<Void>() {
                                        @Override
                                        public void onComplete(@NonNull Task<Void> task)
                                        {

                                            if (task.isSuccessful())
                                            {
                                                Toast.makeText(SettingsActivity.this, "Image save in Database, Successfully...", Toast.LENGTH_SHORT).show();

                                                Picasso.get().load(downloaedUrl).into(userProfileImage);

                                            }
                                            else
                                            {
                                                String message = task.getException().toString();
                                                Toast.makeText(SettingsActivity.this, "Error: " + message, Toast.LENGTH_SHORT).show();
                                            }
                                        }
                                    });
                        }
                        else
                        {
                            String message = task.getException().toString();
                            Toast.makeText(SettingsActivity.this, "Error: " + message, Toast.LENGTH_SHORT).show();

                        }
                    }
                });
            }
        }
    }


    private void RetrieveUserInfo()
    {
        RootRef.child("Users").child(currentUserID)
                .addValueEventListener(new ValueEventListener() {
                    @Override
                    public void onDataChange(DataSnapshot dataSnapshot)
                    {
                        if ((dataSnapshot.exists()) && (dataSnapshot.hasChild("name") && (dataSnapshot.hasChild("image"))))
                        {
                            String retrieveUserName = dataSnapshot.child("name").getValue().toString();
                            String retrievesStatus = dataSnapshot.child("status").getValue().toString();
                            String retrieveProfileImage = dataSnapshot.child("image").getValue().toString();

                            userName.setText(retrieveUserName);
                            userStatus.setText(retrievesStatus);

                            Picasso.get().load(retrieveProfileImage).into(userProfileImage);
                        }
                        else if ((dataSnapshot.exists()) && (dataSnapshot.hasChild("name")))
                        {
                            String retrieveUserName = dataSnapshot.child("name").getValue().toString();
                            String retrievesStatus = dataSnapshot.child("status").getValue().toString();

                            userName.setText(retrieveUserName);
                            userStatus.setText(retrievesStatus);
                        }
                        else
                        {
                            userName.setVisibility(View.VISIBLE);
                            Toast.makeText(SettingsActivity.this, "Please set & update your profile information...", Toast.LENGTH_SHORT).show();
                        }
                    }

                    @Override
                    public void onCancelled(DatabaseError databaseError) {

                    }
                });
    }


    private void SendUserToMainActivity() {
        Intent mainintent = new Intent(SettingsActivity.this, MainActivity.class);
        mainintent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
        startActivity(mainintent);
        finish();
    }
}
预期的结果将是用户选择并存储在 firebase 中的图像被回调并打印到名为 userProfileImage 的图像视图中。谢谢，如果您能提供将不胜感激的解决方案。

标签： javaandroid

解决方案

丢失的 findViewById(R.id.your_View_id) 尝试使用视图/数据绑定来避免这些问题

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