当我尝试更新应用中的图片时，它不是在更新，而是在Firebase存储中更新 我很习惯
Picasso.get（）。load（image）.placeholder（R.drawable.profile）.into（profileImage）;
我也尝试过
Picasso.with（SetupActivity.class）.load（image）.placeholder（R.drawable.profile）.into（profileImage）;
这些是我的依赖项
implementation 'com.google.firebase:firebase-core:16.0.1' implementation 'com.google.firebase:firebase-auth:16.0.2' implementation 'com.google.firebase:firebase-database:16.0.1' implementation 'com.google.firebase:firebase-storage:16.0.1' implementation 'de.hdodenhof:circleimageview:2.2.0' implementation 'com.theartofdev.edmodo:android-image-cropper:2.6.+' implementation 'com.squareup.picasso:picasso:2.71828' testImplementation 'junit:junit:4.12' androidTestImplementation 'com.android.support.test:runner:1.0.2' androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
public class SetupActivity extends AppCompatActivity {
private EditText userName, fullName, countryName;
private Button saveInformationButton;
private CircleImageView profileImage;
private FirebaseAuth mAuth;
private DatabaseReference userRef;
private StorageReference userProfileImageRef;
private ProgressDialog loadingBar;
String currentUserID;
final static int Gallery_Pick = 1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_setup);
getSupportActionBar().setTitle("User Details");
mAuth = FirebaseAuth.getInstance();
currentUserID = mAuth.getCurrentUser().getUid();
userRef = FirebaseDatabase.getInstance().getReference().child("Users").child(currentUserID);
userProfileImageRef = FirebaseStorage.getInstance().getReference().child("Profile Images");
userName =(EditText)findViewById(R.id.setup_username);
fullName =(EditText)findViewById(R.id.setup_full_name);
countryName =(EditText)findViewById(R.id.setup_country_name);
saveInformationButton = (Button)findViewById(R.id.setup_information_button);
profileImage = (CircleImageView)findViewById(R.id.setup_profile_image);
loadingBar = new ProgressDialog(this);
saveInformationButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view)
{
SaveAccountSetupInformation();
}
});
profileImage.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, Gallery_Pick);
}
});
userRef.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
if(dataSnapshot.exists())
{
if (dataSnapshot.hasChild("profileimage"))
{
String image = dataSnapshot.child("profileimage").getValue().toString();
Picasso.get().load(image).placeholder(R.drawable.profile).into(profileImage);
}
else
{
Toast.makeText(SetupActivity.this, "Please select profile image first.", Toast.LENGTH_SHORT).show();
}
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
super.onActivityResult(requestCode, resultCode, data);
if(requestCode==Gallery_Pick && 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)
{
loadingBar.setTitle("Profile Image");
loadingBar.setMessage("Please wait, while we updating your profile image...");
loadingBar.show();
loadingBar.setCanceledOnTouchOutside(true);
Uri resultUri = result.getUri();
StorageReference filePath = userProfileImageRef.child(currentUserID + ".jpg");
filePath.putFile(resultUri).addOnCompleteListener(new OnCompleteListener<UploadTask.TaskSnapshot>() {
@Override
public void onComplete(@NonNull final Task<UploadTask.TaskSnapshot> task)
{
if(task.isSuccessful())
{
// Toast.makeText(SetupActivity.this, "Profile Image updated...", Toast.LENGTH_SHORT).show();
final String downloadUrl = task.getResult().getStorage().getDownloadUrl().toString();
userRef.child("profileimage").setValue(downloadUrl)
.addOnCompleteListener(new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task)
{
if(task.isSuccessful())
{
Intent selfIntent = new Intent(SetupActivity.this, SetupActivity.class);
startActivity(selfIntent);
Toast.makeText(SetupActivity.this, "Profile Image Updated...", Toast.LENGTH_SHORT).show();
loadingBar.dismiss();
}
else
{
String message = task.getException().getMessage();
Toast.makeText(SetupActivity.this, "Error Occured: " + message, Toast.LENGTH_SHORT).show();
loadingBar.dismiss();
}
}
});
}
}
});
}
else
{
Toast.makeText(this, "Error Occured: Image not uploaded, Try Again.", Toast.LENGTH_SHORT).show();
loadingBar.dismiss();
}
}
}
答案 0 :(得分：1)
在毕加索尝试.memoryPolicy(MemoryPolicy.NO_CACHE)和.networkPolicy(NetworkPolicy.NO_CACHE)。
答案 1 :(得分：0)
Picasso确实会缓存图像，但是如果您的图像具有不同的URI，则会下载它，但是仍在缓存前一个图像，您可以“无效”以删除前一个图像，然后加载最近的图像。
Picasso.with(bContext).invalidate(bFileURI); //invalidates files
如果您的结构是如此，以至于您使用相同的URI覆盖了图像，并且您根本不希望它缓存，那么请继续
Picasso.with(bContext)
.load(bImage_url)
.memoryPolicy(MemoryPolicy.NO_CACHE)
.networkPolicy(NetworkPolicy.NO_CACHE)
.placeholder(R.drawable.default_img)
.into(bImageView);
（我宁愿使后者无效，因为后者不是离线使用的好习惯）
由于使用的是Firebase，因此您也可以考虑将其保存为SharePreference中的字符串作为字符串以供离线使用...仍然是错误的做法。
final long bOneMB = 1024 * 1024; //size
userProfileImageRef.getBytes(bOneMB) //get byte
.addOnSuccessListener(new OnSuccessListener<byte[]>() { // add listener
@Override
public void onSuccess(byte[] bytes) { // called if successful
Bitmap bBitmap = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
profileImage.setImageBitmap(bBitmap); // sets bitmap in image view
}
});