我在我的聊天应用程序中使用firebase数据库，当我点击停用按钮时，它会从firebase的Authentication部分删除用户，但不会从firebase的数据库部分删除用户，而我的所有用户活动都会检索用户数据库部分的数据。因此，当用户停用其帐户时，它会被删除，但他的帐户仍然可供其他用户查看。在这之下我附上我的代码..
public class SettingsActivity extends AppCompatActivity{
ImageView ivCamera;
private DatabaseReference mUserDatabase;
private FirebaseUser mCurrentUser;
private CircleImageView mDisplayImage;
private TextView mName;
private TextView mStatus;
private Button mProfileBtn;
private Button mDeactivateBtn;
//private Button mImageBtn;
private static final int GALLERY_PICK = 1;
private StorageReference mImageStorage;
private ProgressDialog mProgressDialog;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_settings);
mDisplayImage = (CircleImageView) findViewById(R.id.settings_image);
mName = (TextView) findViewById(R.id.settings_name);
mStatus = (TextView) findViewById(R.id.settings_status);
mProfileBtn = (Button) findViewById(R.id.settings_profile_btn);
mDeactivateBtn = (Button) findViewById(R.id.deactivate_btn);
ivCamera = (ImageView) findViewById(R.id.ivCamera);
mProgressDialog = new ProgressDialog(this);
mImageStorage = FirebaseStorage.getInstance().getReference();
mCurrentUser = FirebaseAuth.getInstance().getCurrentUser();
String current_uid = mCurrentUser.getUid();
mUserDatabase = FirebaseDatabase.getInstance().getReference().child("Users").child(current_uid);
mUserDatabase.keepSynced(true);
mUserDatabase.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
String name = dataSnapshot.child("name").getValue().toString();
final String image = dataSnapshot.child("image").getValue().toString();
String status = dataSnapshot.child("status").getValue().toString();
String thumb_image = dataSnapshot.child("thumb_image").getValue().toString();
mName.setText(name);
mStatus.setText(status);
if (!image.equals("default")) {
//Picasso.with(SettingsActivity.this).load(image).placeholder(R.drawable.avatar).into(mDisplayImage);
Picasso.with(SettingsActivity.this).load(image).networkPolicy(NetworkPolicy.OFFLINE)
.placeholder(R.drawable.avatar).into(mDisplayImage, new Callback() {
@Override
public void onSuccess() {
}
@Override
public void onError() {
Picasso.with(SettingsActivity.this).load(image).placeholder(R.drawable.avatar).into(mDisplayImage);
}
});
}
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
//ivGallery =(ImageView) findViewById(R.id.ivGallery);
//ivGallery.setOnClickListener(new View.OnClickListener() {
// @Override
// public void onClick(View view) {
//}
//});
mProfileBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String name_value = mName.getText().toString();
String status_value = mStatus.getText().toString();
Intent status_Intent = new Intent(SettingsActivity.this, StatusActivity.class);
status_Intent.putExtra("status_value", status_value);
status_Intent.putExtra("name_value", name_value);
startActivity(status_Intent);
}
});
ivCamera.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent galleryIntent = new Intent();
galleryIntent.setType("image/*");
galleryIntent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(galleryIntent, "SELECT IMAGE"), GALLERY_PICK);
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == GALLERY_PICK && resultCode == RESULT_OK) {
Uri imageUri = data.getData();
CropImage.activity(imageUri).setAspectRatio(1, 1).start(this);
//Toast.makeText(SettingsActivity.this, imageUri, Toast.LENGTH_LONG).show();
}
if (requestCode == CropImage.CROP_IMAGE_ACTIVITY_REQUEST_CODE) {
CropImage.ActivityResult result = CropImage.getActivityResult(data);
if (resultCode == RESULT_OK) {
mProgressDialog = new ProgressDialog(SettingsActivity.this);
mProgressDialog.setTitle("Uploading Image.....");
mProgressDialog.setMessage("Please wait while we upload and process the image.");
mProgressDialog.setCanceledOnTouchOutside(false);
mProgressDialog.show();
Uri resultUri = result.getUri();
File thumb_filePath = new File(resultUri.getPath());
String current_user_id = mCurrentUser.getUid();
Bitmap thumb_bitmap = new Compressor(this)
.setMaxWidth(200)
.setMaxHeight(200)
.setQuality(75)
.compressToBitmap(thumb_filePath);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
thumb_bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos);
final byte[] thumb_byte = baos.toByteArray();
StorageReference filePath = mImageStorage.child("profile_images").child(current_user_id + ".jpg");
final StorageReference thumb_filepath = mImageStorage.child("profile_images").child("thumbs").child(current_user_id + ".jpg");
filePath.putFile(resultUri).addOnCompleteListener(new OnCompleteListener<UploadTask.TaskSnapshot>() {
@Override
public void onComplete(@NonNull Task<UploadTask.TaskSnapshot> task) {
if (task.isSuccessful()) {
final String download_url = task.getResult().getDownloadUrl().toString();
UploadTask uploadTask = thumb_filepath.putBytes(thumb_byte);
uploadTask.addOnCompleteListener(new OnCompleteListener<UploadTask.TaskSnapshot>() {
@Override
public void onComplete(@NonNull Task<UploadTask.TaskSnapshot> thumb_task) {
String thumb_downloadUrl = thumb_task.getResult().getDownloadUrl().toString();
if (thumb_task.isSuccessful()) {
Map update_hashMap = new HashMap();
update_hashMap.put("image", download_url);
update_hashMap.put("thumb_image", thumb_downloadUrl);
mUserDatabase.updateChildren(update_hashMap).addOnCompleteListener(new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
if (task.isSuccessful()) {
mProgressDialog.dismiss();
Toast.makeText(SettingsActivity.this, "Success Uploading.", Toast.LENGTH_LONG).show();
}
}
});
} else {
Toast.makeText(SettingsActivity.this, "Error in Uploading thumbnail.", Toast.LENGTH_LONG).show();
mProgressDialog.dismiss();
}
}
});
} else {
Toast.makeText(SettingsActivity.this, "Error in Uploading.", Toast.LENGTH_LONG).show();
mProgressDialog.dismiss();
}
}
});
} else if (resultCode == CropImage.CROP_IMAGE_ACTIVITY_RESULT_ERROR_CODE) {
Exception error = result.getError();
}
}
}
public static String random() {
Random generator = new Random();
StringBuilder randomStringBuilder = new StringBuilder();
int randomLength = generator.nextInt(10);
char tempChar;
for (int i = 0; i < randomLength; i++) {
tempChar = (char) (generator.nextInt(96) + 32);
randomStringBuilder.append(tempChar);
}
return randomStringBuilder.toString();
}
public void deactivate(View view)
{
FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();
if (user!=null)
{
mProgressDialog.setTitle("Deactivate Account");
mProgressDialog.setMessage("Deactivating...");
mProgressDialog.show();
mUserDatabase.child(mCurrentUser.getUid()).removeValue();
user.delete().addOnCompleteListener(new OnCompleteListener<Void>() {
public void onComplete(@NonNull Task<Void> task) {
if (task.isSuccessful()) {
Toast.makeText(getApplicationContext(), "Account is Deactivated", Toast.LENGTH_LONG).show();
finish();
Intent intent = new Intent(SettingsActivity.this, RegisterActivity.class);
startActivity(intent);
} else {
Toast.makeText(getApplicationContext(), "Account could not be Deactivate", Toast.LENGTH_LONG).show();
}
mProgressDialog.dismiss();
}
});
}
}
}
我希望当用户停用其帐户时，它将不再显示在所有用户活动中
答案 0 :(得分：1)
有多种方法可以做到这一点。
希望这可以帮助您回答您的问题。 如果您仍然在脑海中提出疑问，可以提问。
删除孩子：
<input type="text" ng-model="list[0].name">
<label ng-repeat="data in list[0].types">{{data.work}}{{$last ? '' : ', '}}</label>
简单删除节点。
您可以根据需要进行自定义。
答案 1 :(得分：0)
DatabaseReference delete = FirebaseDatabase.getInstance（）。getReference（）。child（“Node”）; delete.setValue（NULL）;