我收到以下错误消息：
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.artlink/com.example.artlink.SettingsActivity}: java.lang.NullPointerException: Can't pass null for argument 'pathString' in child()
代码如下：
public class SettingsActivity extends AppCompatActivity {
private EditText mNameField, mPhoneField;
private Button mBack, mConfirm;
private ImageView mProfileImage;
private FirebaseAuth mAuth;
private DatabaseReference mCustomerDatabase;
private String userId, name, phone, profileImageUrl;
private Uri resultUri;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_settings);
String userSex = getIntent().getExtras().getString("userSex");
mNameField = (EditText) findViewById(R.id.name);
mPhoneField = (EditText) findViewById(R.id.phone);
mProfileImage = (ImageView) findViewById(R.id.profileImage);
mBack = (Button) findViewById(R.id.back);
mConfirm = (Button) findViewById(R.id.confirm);
mAuth = FirebaseAuth.getInstance();
userId = mAuth.getCurrentUser().getUid();
mCustomerDatabase = FirebaseDatabase.getInstance().getReference().child("Users").child(userSex).child(userId);
getUserInfo();
mProfileImage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent(Intent.ACTION_PICK);
intent.setType("image/*");
startActivityForResult(intent, 1);
}
});
mConfirm.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
saveUserInformation();
}
});
mBack.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
finish();
return;
}
});
}
private void getUserInfo() {
mCustomerDatabase.addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
if (dataSnapshot.exists() && dataSnapshot.getChildrenCount()>0) {
Map<String, Object> map = (Map<String, Object>) dataSnapshot.getValue();
if (map.get("name")!=null){
name = map.get("name").toString();
mNameField.setText(name);
}
if (map.get("phone")!=null) {
phone = map.get("phone").toString();
mPhoneField.setText(phone);
}
if (map.get("profileImageUrl")!=null){
profileImageUrl = map.get("profileImageUrl").toString();
Glide.with(getApplicationContext()).load(profileImageUrl).into(mProfileImage);
}
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
}
private void saveUserInformation() {
name = mNameField.getText().toString();
phone = mPhoneField.getText().toString();
Map userInfo = new HashMap();
userInfo.put("name", name);
userInfo.put("phone", phone);
mCustomerDatabase.updateChildren(userInfo);
if(resultUri !=null) {
final StorageReference filepath = FirebaseStorage.getInstance().getReference().child("profileImages").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.addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
finish();
}
});
uploadTask.addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
filepath.getDownloadUrl().addOnSuccessListener(new OnSuccessListener<Uri>() {
@Override
public void onSuccess(Uri uri) {
Map newImage = new HashMap();
newImage.put("profileImageUrl", uri.toString());
mCustomerDatabase.updateChildren(newImage);
finish();
return;
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception exception) {
finish();
return;
}
});
}
});
}else{
finish();
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == 1 && resultCode == Activity.RESULT_OK);
final Uri imageUri = data.getData();
resultUri = imageUri;
mProfileImage.setImageURI(resultUri);
}
}