package com.example.buttonTest;

import android.app.Activity;
import android.os.Bundle;
import android.widget.*;

public class ButtonTestActivity extends Activity {
      TextView tv = new TextView(this);
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        tv.setText("Mein Beispieltext");
        setContentView(tv);
    }
}

package de.whatever;

import android.app.Activity;
import android.os.Bundle;
import android.widget.LinearLayout;
import android.widget.TextView;

public class WhateverClass extends Activity {
    /** Called when the activity is first created. */
    private LinearLayout linear;
    private TextView text; 
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        linear = new LinearLayout(this);
        linear.setOrientation(LinearLayout.VERTICAL);
        text = new TextView(this);
        text.setText("myTest!");
        linear.addView(text);

        setContentView(linear);

    }
}