我在我的应用程序中使用 RecyclerView 供教授查看学生列表，其中包含照片和其他详细信息以及删除选项。凡事我都尽力小心翼翼地去做。但存在一个问题，来自 firebase 的照片未加载到 RecyclerView 中。有时它会加载一张或两张照片，然后停止加载照片。当我的应用程序加载时，我正在观察 android Studio 上的“运行”选项。然后我发现了类似的东西......
W/art: Throwing OutOfMemoryError "Failed to allocate a 71663628 byte allocation with 4188416 free bytes and 46MB until OOM"
V/FA: Inactivity, disconnecting from the service
为什么这个问题会发生在我身上，我真的还没有明白。请帮助我摆脱这个问题。
经过大量查找后，我尝试了一些据说使缓存无效/重新启动的步骤。但这对我不起作用。
这是我对 RecyclerView 的主要 Activity :
public class HRequestedStudents extends AppCompatActivity {
DatabaseReference databaseReference;
ProgressDialog progressDialog;
List<RegisteredStudent> list = new ArrayList<>();
RecyclerView recyclerView;
RecyclerView.Adapter adapter ;
RequestedStudents madapter;
RegisteredStudent registeredStudent;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_hrequested_students);
recyclerView = (RecyclerView) findViewById(R.id.recycleView);
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(HRequestedStudents.this));
progressDialog = new ProgressDialog(HRequestedStudents.this);
progressDialog.setMessage("Loading Data...");
progressDialog.show();
databaseReference = FirebaseDatabase.getInstance().getReference("RegisteredStudent");
databaseReference.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot snapshot) {
list.clear();
for (DataSnapshot dataSnapshot : snapshot.getChildren()) {
registeredStudent = dataSnapshot.getValue(RegisteredStudent.class);
list.add(registeredStudent);
}
adapter = new RequestedStudents(HRequestedStudents.this, list);
recyclerView.setAdapter(adapter);
progressDialog.dismiss();
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
progressDialog.dismiss();
}
});
}
}
这是我的适配器 Activity
public class RequestedStudents extends RecyclerView.Adapter<RequestedStudents.RecyclerViewHolder> {
private Context mContext;
ProgressDialog progressDialog;
List<RegisteredStudent> requestedStudents;
FirebaseStorage mFirebaseStorage = getInstance();
DatabaseReference mRef = FirebaseDatabase.getInstance().getReference("RegisteredStudent");
public RequestedStudents(Context context, List<RegisteredStudent> list) {
mContext=context;
requestedStudents = list;
}
@Override
public RecyclerViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(mContext).inflate(R.layout.hrstudentlistitems, parent, false);
return new RecyclerViewHolder(view);
}
@Override
public void onBindViewHolder(RecyclerViewHolder holder, int position) {
RegisteredStudent currentStudentDetails = requestedStudents.get(position);
holder.name.setText("Name: "+currentStudentDetails.getRegeName());
holder.room.setText("Room: "+currentStudentDetails.getRegeRoom());
holder.id.setText("ID: "+currentStudentDetails.getRegeID());
holder.batch.setText("Batch: "+currentStudentDetails.getRegeBatch());
holder.dept.setText("Department: "+currentStudentDetails.getRegeDept());
holder.email = currentStudentDetails.getRegeEmail();
holder.nam = currentStudentDetails.getRegeName();
holder.rum = currentStudentDetails.getRegeRoom();
holder.mobile = currentStudentDetails.getRegeMobile();
holder.pass = currentStudentDetails.getRegePass();
holder.iD = currentStudentDetails.getRegeID();
holder.Batch = currentStudentDetails.getRegeID();
holder.Dept = currentStudentDetails.getRegeDept();
holder.imageUri = currentStudentDetails.getImageUri();
Picasso.get().load(currentStudentDetails.getImageUri()).into(holder.profile_photo);
}
@Override
public int getItemCount() {
return requestedStudents.size();
}
public class RecyclerViewHolder extends RecyclerView.ViewHolder {
public TextView name, id, room, batch, dept;
public String email, mobile, imageUri, pass, iD, nam, rum, uId, Batch, Dept;
public CircleImageView profile_photo;
public Button remove, accept;
public RecyclerViewHolder(View item) {
super(item);
name = item.findViewById(R.id.name);
room = item.findViewById(R.id.room);
id = item.findViewById(R.id.id);
batch = item.findViewById(R.id.batch);
dept = item.findViewById(R.id.dept);
profile_photo = item.findViewById(R.id.profile_photo);
remove = item.findViewById(R.id.remove);
accept = item.findViewById(R.id.accept);
item.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
progressDialog = new ProgressDialog(mContext);
progressDialog.setMessage("Please Wait...");
progressDialog.show();
LayoutInflater inflater = LayoutInflater.from(mContext);
View view = inflater.inflate(R.layout.student_bistarito, null);
CircleImageView imagebi = view.findViewById(R.id.imagebi);
TextView nambi = view.findViewById(R.id.nambi);
TextView rumbi = view.findViewById(R.id.rumbi);
Button call = view.findViewById(R.id.call);
Button cancel = view.findViewById(R.id.cancel);
final AlertDialog alertDialog = new AlertDialog.Builder(mContext).create();
nambi.setText("Name: " + nam);
rumbi.setText("Room: " + rum);
Picasso.get().load(imageUri).into(imagebi);
progressDialog.dismiss();
uId = FirebaseAuth.getInstance().getUid();
call.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent i = new Intent(Intent.ACTION_CALL);
i.setData(Uri.parse("tel:" + mobile));
if (ContextCompat.checkSelfPermission(mContext, CALL_PHONE) == PackageManager.PERMISSION_GRANTED) {
mContext.startActivity(i);
} else {
Toast.makeText(mContext, "Go to settings and allow call permission", Toast.LENGTH_LONG).show();
}
alertDialog.dismiss();
}
});
cancel.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
try {
Toast.makeText(mContext, "Shubho", Toast.LENGTH_SHORT).show();
} catch (Exception e) {
Toast.makeText(mContext, e.getMessage(), Toast.LENGTH_LONG).show();
}
alertDialog.dismiss();
}
});
alertDialog.setView(view);
alertDialog.show();
alertDialog.getWindow().setBackgroundDrawable(null);
}
});
profile_photo.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
LayoutInflater inflater = LayoutInflater.from(mContext);
View vi = inflater.inflate(R.layout.activity_photo, null);
ImageView photo = vi.findViewById(R.id.image);
Button close = vi.findViewById(R.id.close);
final AlertDialog ad = new AlertDialog.Builder(mContext).create();
Picasso.get().load(imageUri).into(photo);
close.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
ad.dismiss();
}
});
ad.setView(vi);
ad.show();
ad.getWindow().setBackgroundDrawable(null);
}
});
accept.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
}
});
remove.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
AlertDialog.Builder builder = new AlertDialog.Builder(mContext);
builder.setTitle("Delete");
builder.setMessage("Are you sure to remove this student?");
builder.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
try {
Query query = mRef.orderByChild("email").equalTo(email);
query.addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
for (DataSnapshot ds : dataSnapshot.getChildren()) {
ds.getRef().removeValue();
}
Toast.makeText(mContext, "Removed Successfully!", Toast.LENGTH_SHORT).show();
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
Toast.makeText(mContext, databaseError.getMessage(), Toast.LENGTH_SHORT).show();
}
});
StorageReference mPictureReferance = getInstance().getReferenceFromUrl(imageUri);
mPictureReferance.delete().addOnSuccessListener(new OnSuccessListener<Void>() {
@Override
public void onSuccess(Void aVoid) {
Toast.makeText(mContext, "Removed Successfully!", Toast.LENGTH_SHORT).show();
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
Toast.makeText(mContext, e.getMessage(), Toast.LENGTH_SHORT).show();
}
});
} catch (Exception e) {
Toast.makeText(mContext, e.getMessage(), Toast.LENGTH_LONG).show();
}
}
});
builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
builder.create().show();
}
});
}
}
}
我想将所有图像加载到 RecyclerView 中，而不会收到错误行“不活动，正在与服务断开连接”。我该如何解决这个问题？
最佳答案
您在上方显示的错误意味着图像尺寸非常大。
你能做的是
将照片上传到
Firebase时，您可以压缩照片大小，然后上传。这样，当您的android 应用从Firebase获取照片时，图像大小将会更小，并且可以轻松分配。您可以引用https://developer.android.com/topic/performance/graphics/load-bitmap有效地将重型或大型图像加载到 Android 中。
首先将被视为每个人都会这样做的方式。由于您的 Firebase 存储使用量将会减少，并且用户可以在应用中轻松下载您的图像，而不会出现任何延迟或内存问题。
关于java - 如何将上传到云存储的图片调整为指定大小？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/59536904/