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copied!<p>You just need to intialize the <code>Button</code> and <code>EditText</code> inside your <code>MainActivity.java</code></p> <p><code>XML Layout File</code></p> <pre><code><?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <EditText android:id="@+id/edit" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_gravity="top" /> <Button android:id="@+id/formula" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="Formula" android:gravity="bottom" /> </code></pre> <h2> </h2> <pre><code> public class MainActivity extends Activity { public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Button F=(Button)findViewById(R.id.formula); EditText editText = (EditText) findViewById(R.id.edit); F.setOnClickListener(new View.onClickListener() { public void onClick() { sendMessage(); } } } public void sendMessage() { String message = editText.getText().toString(); Intent intent = new Intent(MainActivity.this, FormulaActivity.class); intent.putExtra("EXTRA_MESSAGE", message); startActivity(intent); } } </code></pre> <hr> <pre><code>public class FormulaActivity extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Intent intent = getIntent(); String message = intent.getStringExtra("EXTRA_MESSAGE"); TextView textView = new TextView(this); textView.setTextSize(40); textView.setText(message); // Set the text view as the activity layout setContentView(textView); } </code></pre>

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