Change TextView if Spinner or EditText is changed

This method can be used to place editext text and selected item in TextView

mEditText.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {

        }

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {
            if (!mEditText.getText().toString().trim().isEmpty()) {
                value = Double.parseDouble(mEditText.getText().toString());

                mTextView.setText(value + "" + mSpinner.getAdapter().getItem(mSpinner.getSelectedItemPosition()).toString());
            }
        }

        @Override
        public void afterTextChanged(Editable s) {

        }
    });

mSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
            if (mMapUnit.containsKey(lengthKey[position])) {
                if (!mEditText.getText().toString().trim().isEmpty()) {
                    value = Double.parseDouble(mEditText.getText().toString());

                    // calculate

                    mTextView.setText(value + "" + mSpinner.getAdapter().getItem(position).toString());
                }
            }
        }

        @Override
        public void onNothingSelected(AdapterView<?> parent) {

        }
    });

      

        
        
        
      

    

A little explanation of the code above:

I assume you know what an Adapter is, but I'm going to explain it anyway; An adapter is an object that contains information that should be displayed in a view (in this case, a Spinner).

This adapter is connected to the Spinner view and calls the mSpinner .getAdapter () method

You will receive the same adapter instance that is attached to the Spinner. Since the Spinner works in conjunction with the adapter, the position of the element in the Spinner will be in the same position in the adapter.

So, you can call mSpinner.getAdapter () .getItem (position); to get the element at position.

Then you should see what the adapter is using for the ListTypes. If this is a line you can do

String itemText = ((String) mSpinner.getAdapter (). GetItem (position) ) ;

When the onTextChanged callback is called, the EditText text changes (or changes) and it doesn't think about the Spinner. This way you don't get Spinner parameters (like current position or id). Thus, you will need to get it manually with the explanation above.

When the OnItemSelected callback is called, the Spinner has changed and, you guessed it, this time we have those parameters that I mentioned. This way you don't have to get the selected item (which is dangerous because the Spinner can still handle the change and the selected item of the spinner can be different from the position provided by the callback)

So you have to use the callback position parameter.

Since I couldn't find the "result" variable, I assumed that you pointed to the "value" variable in the OnItemSelectedListener.

Good luck!