图像未显示在图像视图中，并显示以下错误

Question

它将我带到图库以选择图像，但未显示在应用程序中，当单击上传按钮时，它只是一个空白图像视图

< li >我的Java代码

package com.example.stdio9;
import android.widget.ImageView;
import android.widget.Toast;

import com.bumptech.glide.Glide;
import com.google.android.gms.tasks.OnSuccessListener;
import com.karumi.dexter.Dexter;
import com.karumi.dexter.PermissionToken;
import com.karumi.dexter.listener.PermissionDeniedResponse;
import com.karumi.dexter.listener.PermissionGrantedResponse;
import com.karumi.dexter.listener.PermissionRequest;
import com.karumi.dexter.listener.single.PermissionListener;

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

public class update_profile extends AppCompatActivity {

    ImageView uimage;
    EditText uname;
    Button btnupdate;

    DatabaseReference dbreference;
    StorageReference storageReference;

    Uri filepath;
    Bitmap bitmap;
    String UserId="";

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

        uimage=(ImageView)findViewById(R.id.uimage);
        uname=(EditText)findViewById(R.id.uname);
        btnupdate=(Button)findViewById(R.id.btnupdate);

        FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();
        UserId=user.getUid();
        dbreference = FirebaseDatabase.getInstance().getReference().child("userprofile");
        storageReference = FirebaseStorage.getInstance().getReference();

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

                Dexter.withContext(getApplicationContext())
                        .withPermission(Manifest.permission.READ_EXTERNAL_STORAGE)
                        .withListener(new PermissionListener() {
                            @Override
                            public void onPermissionGranted(PermissionGrantedResponse permissionGrantedResponse) {
                                Intent intent = new Intent();
                                intent.setType("image/*");
                                intent.setAction(Intent.ACTION_GET_CONTENT);
                                startActivityForResult(Intent.createChooser(intent,"Please select file"),101);

                            }

                            @Override
                            public void onPermissionDenied(PermissionDeniedResponse permissionDeniedResponse) {

                            }

                            @Override
                            public void onPermissionRationaleShouldBeShown(PermissionRequest permissionRequest, PermissionToken permissionToken) {
                                permissionToken.continuePermissionRequest();

                            }
                        }).check();

            }
        });

        btnupdate.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                updatetofirebase();

            }
        });

    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if(requestCode==101 &&requestCode==RESULT_OK)
        {
            filepath=data.getData();
            try
            {
                InputStream inputStream = getContentResolver().openInputStream(filepath);
                bitmap= BitmapFactory.decodeStream(inputStream);
                uimage.setImageBitmap(bitmap);
            }catch(Exception ex)
            {
                Toast.makeText(getApplicationContext(), ex.getMessage(), Toast.LENGTH_SHORT).show();
            }
        }
    }

    public void updatetofirebase()
    {
        final ProgressDialog pd = new ProgressDialog(this);
        pd.setTitle("Uploading");
        pd.show();

        final StorageReference uploader =  storageReference.child("profileimages/"+"img"+System.currentTimeMillis());
        uploader.putFile(filepath)
                .addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
                    @Override
                    public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
                        uploader.getDownloadUrl().addOnSuccessListener(new OnSuccessListener<Uri>() {
                            @Override
                            public void onSuccess(Uri uri) {
                                {
                                    final Map<String,Object> map = new HashMap<>();
                                    map.put("uimage",uri.toString());
                                    map.put("uname",uname.getText().toString());

                                    dbreference.child(UserId).addValueEventListener(new ValueEventListener() {
                                        @Override
                                        public void onDataChange(@NonNull DataSnapshot snapshot) {
                                            if(snapshot.exists())
                                                dbreference.child(UserId).updateChildren(map);
                                            else
                                                dbreference.child(UserId).setValue(map);
                                        }

                                        @Override
                                        public void onCancelled(@NonNull DatabaseError error) {

                                        }
                                    });

                                    pd.dismiss();
                                    Toast.makeText(getApplicationContext(), "Updated Successfully", Toast.LENGTH_SHORT).show();
                                }
                            }
                        });
                    }
                })
                .addOnProgressListener(new OnProgressListener<UploadTask.TaskSnapshot>() {
                    @Override
                    public void onProgress(@NonNull UploadTask.TaskSnapshot snapshot) {
                        float percent = (100*snapshot.getBytesTransferred())/snapshot.getTotalByteCount();
                        pd.setMessage("Uploaded :"+(int)percent+"%");

                    }
                });
    }

    @Override
    protected void onStart() {
        super.onStart();

        FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();
        UserId=user.getUid();
        dbreference.child(UserId).addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot snapshot) {
                if(snapshot.exists()){
                    uname.setText(snapshot.child("uname").getValue().toString());
                    Glide.with(getApplicationContext()).load(snapshot.child("uimage").getValue().toString()).into(uimage);
                }
            }

            @Override
            public void onCancelled(@NonNull DatabaseError error) {

            }
        });
    }
}

< li>XML代码

<?xml version="1.0" encoding="utf-8"?>
<androidx.appcompat.widget.LinearLayoutCompat xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".update_profile">

    <ImageView
        android:layout_width="200dp"
        android:layout_height="200dp"
        android:id="@+id/uimage"
        android:layout_marginTop="100dp"
        android:layout_gravity="center"
        android:src="@drawable/ic_person"/>

    <EditText
        android:layout_width="300dp"
        android:layout_height="wrap_content"
        android:id="@+id/uname"
        android:textSize="20sp"
        android:layout_gravity="center"
        android:layout_marginTop="20dp"
        android:hint="Enter your name"/>
    
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Update"
        android:id="@+id/btnupdate"
        android:layout_gravity="center"
        android:textSize="25sp"
        android:layout_marginTop="20sp"
        android:padding="12dp"/>

</androidx.appcompat.widget.LinearLayoutCompat>

运行时显示此错误

java.lang.IllegalArgumentException：uri不能为空

以下两处给出错误的行显示了uri错误

  public void onSuccess(Uri uri) {
                                {
                                    final Map<String,Object> map = new HashMap<>();
                                    map.put("uimage",uri.toString());
                                    map.put("uname",uname.getText().toString());

 Dexter.withContext(getApplicationContext())
                        .withPermission(Manifest.permission.READ_EXTERNAL_STORAGE)
                        .withListener(new PermissionListener() {
                            @Override
                            public void onPermissionGranted(PermissionGrantedResponse permissionGrantedResponse) {
                                Intent intent = new Intent();
                                intent.setType("image/*");
                                intent.setAction(Intent.ACTION_GET_CONTENT);
                                startActivityForResult(Intent.createChooser(intent,"Please select file"),101);

Answer 1

您只需要更新如下所示的if语句即可。

if(requestCode == 101 && resultCode == RESULT_OK){
}