Náo consigo fazer a execução

package br.com.damsappcba.frasesdnao;

import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.app.AlertDialog.Builder;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }


    public void botaoadicionar11(View v) {
        setContentView(R.layout.activity_adicionar);
    }

    public void botaoprocurar11(View v) {
        setContentView(R.layout.activity_procurar);
    }

    public void botaofechar11(View v) {
        finish();
    }

    public void botaoadicionar22 (View view) {
        setContentView(R.layout.activity_adicionar);
    }

}

package br.com.damsappcba.frasesdnao;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class adicionar extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_adicionar);
         }

        Button botaoadicionar22 = (Button) findViewById(R.id.botaoadicionar2);{


        botaoadicionar22.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View view) {
                BancoController crud = new BancoController(getBaseContext());
                EditText frase = (EditText) findViewById(R.id.editarfrase2);
                String fraseString = frase.getText().toString();
                String resultado;

                resultado = crud.insereDado(fraseString);

                Toast.makeText(getApplicationContext(), resultado, Toast.LENGTH_LONG).show();
            }


        });
    }

}

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="br.com.damsappcba.frasesdnao.adicionar"
    android:id="@+id/telaadd"
    android:background="#b0ffc8">

    <ImageButton
        android:id="@+id/botaoapagar2"
        android:onClick="botaoapagar22"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@mipmap/ic_apagar"
        android:background="@android:color/transparent"
        android:layout_alignTop="@+id/botaoadicionar2"
        android:layout_centerHorizontal="true" />

    <ImageButton
        android:id="@+id/botaovoltar2"
        android:onClick="botaovoltar22"
        android:layout_width="100px"
        android:layout_height="100px"
        android:src="@mipmap/voltar"
        android:background="@android:color/transparent"
        android:layout_alignBottom="@+id/botaoapagar2"
        android:layout_toEndOf="@+id/botaoapagar2"
        android:layout_marginStart="50dp"/>

    <ImageButton
        android:id="@+id/botaoadicionar2"
        android:onClick="botaoadicionar22"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@mipmap/ic_adicionar_2"
        android:background="@android:color/transparent"
        android:layout_below="@+id/editarfrase2"
        android:layout_toStartOf="@+id/botaoapagar2"
        android:layout_marginEnd="50dp"
        android:layout_marginTop="50dp" />

    <EditText
        android:id="@+id/editarfrase2"
        android:layout_width="fill_parent"
        android:layout_height="200dp"
        android:layout_alignParentTop="true"
        android:layout_alignParentStart="true"
        android:background="#e8e8e8" />

    <Button
        android:id="@+id/botaopesquisar2"
        android:onClick="botaopesquisar22"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Pesquisar"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true" />


</RelativeLayout>