StringExtra.java

package com.permissionnanny.demo.extra;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.TextView;
import butterknife.ButterKnife;
import butterknife.OnTextChanged;
import com.permissionnanny.demo.R;

public class StringExtra implements Extra<String> {

    String mValue = "";

    public StringExtra() {}

    public StringExtra(String value) {
        mValue = value != null ? value : "";
    }

    @Override
    public View getView(Context context, ViewGroup parent, String label) {
        View view = LayoutInflater.from(context).inflate(R.layout.extras_string, parent, false);
        ButterKnife.bind(this, view);
        ((TextView) view.findViewById(R.id.tvLabel)).setText(label);
        EditText etValue = (EditText) view.findViewById(R.id.etValue);
        etValue.setText(mValue);
        etValue.setSelection(etValue.getText().length());
        return view;
    }

    @Override
    public String getValue() {
        return mValue;
    }

    @OnTextChanged(R.id.etValue)
    void onTextChanged(CharSequence s, int start, int before, int count) {
        mValue = s.toString();
    }
}