ReplyField.java

package org.wordpress.android.ui.notifications;

import android.content.Context;
import android.text.Editable;
import android.text.TextUtils;
import android.text.TextWatcher;
import android.util.AttributeSet;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.LinearLayout;

import com.justsystems.hpb.pad.R;

public class ReplyField extends LinearLayout {
    interface OnReplyListener {
        public void onReply(ReplyField field, Editable replyText);
    }

    EditText mTextField;
    ImageButton mReplyButton;
    OnReplyListener mOnReplyListener;

    public ReplyField(Context context) {
        super(context);
    }

    public ReplyField(Context context, AttributeSet attributes) {
        super(context, attributes);
    }

    public ReplyField(Context context, AttributeSet attributes, int defStyle) {
        super(context, attributes, defStyle);
    }

    public void clearFocus() {
        getTextField().clearFocus();
    }

    public void setOnReplyListener(OnReplyListener l) {
        mOnReplyListener = l;
    }

    public ImageButton getReplyButton() {
        return mReplyButton;
    }

    public EditText getTextField() {
        return mTextField;
    }

    public Editable getText() {
        return mTextField.getText();
    }

    public void setText(CharSequence text) {
        mTextField.setText(text);
    }

    public boolean isEmpty() {
        return TextUtils.isEmpty(getText());
    }

    protected void onFinishInflate() {
        mTextField = (EditText) findViewById(R.id.note_reply_field);
        mReplyButton = (ImageButton) findViewById(R.id.note_reply_button);
        mReplyButton.setEnabled(!isEmpty());
        mReplyButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (!isEmpty()) {
                    mOnReplyListener.onReply(ReplyField.this, getText());
                }
            }
        });
        mTextField.addTextChangedListener(new TextWatcher() {
            @Override
            public void afterTextChanged(Editable text) {
                mReplyButton.setEnabled(!isEmpty());
            }

            @Override
            public void beforeTextChanged(CharSequence s, int start, int count,
                    int after) {
                // noop
            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before,
                    int count) {
                // noop
            }
        });
    }
}