Android 如何从数据库中获取多个字符串中的匹配字符串？

嗨，朋友们，我是初学者，我试图创建代码，从编辑文本中获取字符串，然后与firebase中的字符串匹配，但我遇到了一些麻烦，我得到了“在我们的数据库中不匹配”，我想我在某个地方错了，请帮助

private void muamalaVerification() {
    LayoutInflater inflater = getLayoutInflater();
    View alertTextMuamala = inflater.inflate(R.layout.muamala_dialog, null);
    final EditText movieMuamala = alertTextMuamala.findViewById(R.id.movie_muamala);

    Muamala = FirebaseDatabase.getInstance().getReference().child("Miamala/");


    final String MovieMuamala = movieMuamala.getText().toString().trim();
    Muamala.addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(@NonNull DataSnapshot snapshot) {
            String pass = snapshot.getRef().toString();

            if (MovieMuamala.equals(pass)) {
                Toast.makeText(MovieDetails.this, "Excellent Matched", Toast.LENGTH_LONG).show();

                //Save to database in UsedMiamala child
                DatabaseReference MuamalaToUsed = FirebaseDatabase.getInstance().getReference("UsedMiamla");
                MuamalaToUsed.push().setValue(movieMuamala.getText().toString());

                TextView subText = findViewById(R.id.sub_txt);
                subText.setText(movieMuamala.getText().toString());

                Toast.makeText(MovieDetails.this, "Mumamala Saved", Toast.LENGTH_SHORT).show();

            }

            if (!MovieMuamala.equals(pass)) {
                Toast.makeText(MovieDetails.this, "Not Matched in Our Database", Toast.LENGTH_LONG).show();
            }
        }

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

        }
    });

}

---

即使我写了一个正确的字符串，我也只会得到不匹配，我想匹配其中的一个字符串，检查图像plse

您需要遍历所有子节点来检查匹配。这里有一个解决方案，但是它在

kotlin

中

fun verifyWithFirebase(view: View?) {

        val mFirebaseDatabaseReference = FirebaseDatabase.getInstance().reference
        val query = mFirebaseDatabaseReference.child("Miamala")

        val MovieMuamala = editText!!.text.toString().trim { it <= ' ' }

        query.addValueEventListener(object : ValueEventListener {
            
            override fun onDataChange(dataSnapshot: DataSnapshot) { 
                for (eachChild in dataSnapshot.children) {
                    val value = eachChild.getValue(String::class.java)
                        if (MovieMuamala == value)
                            Toast.makeText(this@MainActivity, "Excellent Matched", Toast.LENGTH_LONG).show();
                }
            }

            override fun onCancelled(p0: DatabaseError) {
                Log.d(TAG, "some eroror $p0")
            }
        })
    }

Firebase趣味验证（视图：视图？）{
val mFirebaseDatabaseReference=FirebaseDatabase.getInstance（）.reference
val query=mFirebaseDatabaseReference.child（“Miamala”）
val MovieMuamala=editText！！.text.toString（）.trim{it请检查
java
code

public void verifyWithFirebase(View view) {
        DatabaseReference mRef = FirebaseDatabase.getInstance().getReference().child("Miamala");

        final String MovieMuamala = movieMuamala.getText().toString().trim();

        mRef.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot dataSnapshot) {

                for (DataSnapshot eachChild: dataSnapshot.getChildren()) {

                    String value = eachChild.getValue(String.class);

                    Log.i(TAG, "onDataChange: " + value);
                    
                    if (MovieMuamala.equals(value))
                        Toast.makeText(MainActivity2.this, "Excellent Matched", Toast.LENGTH_SHORT).show();
                }

            }

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

            }
        });
    }

比你，但我不知道科特林，任何其他我dea？请检查新的答案