Ideen Frage zum Layout

package com.example.dbaum.ys.yourspeak;


import android.content.Context;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.text.SpannableString;
import android.text.SpannableStringBuilder;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;


import java.util.ArrayList;


/**
 * Created by DBaum on 19.03.2016.
 */
public class Tastatur {
    private Context ctx;
    private Handler handler;
    private Display display;
    public Tastatur(Context ctx) {
        this.ctx = ctx;
        OnClick(); // ertellt den Handler für das Klick event
        display = new Display(); // ertellt mein Display für den Taschenrechner
    }




    private void OnClick()
    {
        handler = new Handler(new Handler.Callback() {
            @Override
            public boolean handleMessage(Message msg) {
                Bundle b = msg.getData();
                String T = b.getString("TEXT");
                display.setTextViewTxt(display.getSelect(),T);
                return true;
            }
        });
    }


    private class Display {
        private LinearLayout Container;
        private ArrayList<TextViewController> TextViewList;
        private int select;
        public Display()
        {
            TextViewList = new ArrayList<>();
            select = 0;
        }
        public RelativeLayout getDisplay() {
            RelativeLayout relativeLayout = new RelativeLayout(ctx); // Das RelativeLayout ist dafür, das meine Mathematische Aufgabe Zentiert ist
            relativeLayout.setLayoutParams(new LinearLayout.LayoutParams(
                    LinearLayout.LayoutParams.MATCH_PARENT,
                    LinearLayout.LayoutParams.MATCH_PARENT, 1));
            //Container  ist das Layout in dem Meine Ganzen View gelagert werden


            /* BSP Buch  --- = Buchstrich View
                ********************************************** <= Lin/ Horizontal
                * ************************ <= Lin/Vertikal   *
                * * ******************** *                   *
                * * *      TextView1   * *                   *
                * * ******************** * *******************
                * * -------------------  * *      TextView3  *
                * * ******************** * *******************
                * * *      TextView2   * *                   *
                * * ******************** *                   *
                * ************************                   *
                **********************************************
             */
            Container = new LinearLayout(ctx);
            Container.setOrientation(LinearLayout.VERTICAL);
            RelativeLayout.LayoutParams relParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
            relParams.addRule(RelativeLayout.CENTER_IN_PARENT, RelativeLayout.CENTER_HORIZONTAL | RelativeLayout.CENTER_VERTICAL);
            Container.setLayoutParams(relParams);
            Container.setGravity(Gravity.CENTER_VERTICAL);
            Container.addView(getTextView());
            relativeLayout.addView(Container);
            return relativeLayout;
        }


        //Layout
        public TextView getTextView() {
            TextViewController textViewController = new TextViewController();
            TextViewList.add(textViewController);
            select = TextViewList.size() - 1; //select das Neue(Letzt)
            return textViewController.Tv;
        }


        public void setTextViewTxt(int Select, String Text) {
            TextViewList.get(Select).setText(Text); 
        }


        public int getSelect() {
            return select;
        }
    }


    private class KeyBoard implements View.OnClickListener {


        private LinearLayout getKey()
        {
            LinearLayout ll = new LinearLayout(ctx);
            ll.setOrientation(LinearLayout.HORIZONTAL);
            for(int i = 0;i<=9;i+=1)
            {
                Button P = new Button(ctx);
                P.setText(Integer.toString(i));
                P.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT, 1));
                P.setOnClickListener(this);
                ll.addView(P);
            }
            return ll;
        }


        @Override
        public void onClick(View v) {
            Bundle b = new Bundle();
            b.putString("TEXT", ((TextView) v).getText().toString());
            Message p = new Message();
            p.setData(b);
            handler.sendMessage(p);
        }




    }


    private class TextViewController
    {
        private String Text;
        private TextView Tv;


        public TextViewController()
        {
            Tv = new TextView(ctx, null, R.style.TextLay);
            Text = "";
        }


        public void setText(String text){
            int select = Tv.getSelectionEnd()-1;
            Tv.append(text, select, select+1) ; //Texteinfügen an der Courser Poition
        }


        public String getText() {
            return Text;
        }
    }
    public LinearLayout getView()
    {
        LinearLayout LL = new LinearLayout(ctx);
        LL.setOrientation(LinearLayout.VERTICAL);
        LL.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT));
        LL.addView(display.getDisplay());
        LL.addView(new KeyBoard().getKey());
        return LL;
    }
}