Prompt User Input Eingaben speichern

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"   
android:id="@+id/layout_root"    
android:layout_width="fill_parent"    
android:layout_height="fill_parent"   
android:orientation="vertical"    
android:padding="10dp" >    


<TextView        
android:id="@+id/kategorie"        
android:layout_width="wrap_content"        
android:layout_height="wrap_content"        
android:text="Kategorie : "        
android:textAppearance="?android:attr/textAppearanceLarge" />     


<EditText        
android:id="@+id/kategorieInput"        
android:layout_width="match_parent"        
android:layout_height="wrap_content"         
android:inputType="text" >              
<requestFocus />          
</EditText>
    
<TextView        
android:id="@+id/betrag"        
android:layout_width="wrap_content"        
android:layout_height="wrap_content"        
android:text="Betrag : "        
android:textAppearance="?android:attr/textAppearanceLarge" />            


<EditText        
android:id="@+id/betragInput"        
android:layout_width="match_parent"        
android:layout_height="wrap_content"        
android:ems="10"        
android:inputType="number" />    


<TextView        
android:id="@+id/datum"        
android:layout_width="wrap_content"        
android:layout_height="wrap_content"        
android:text="Datum : "        
android:textAppearance="?android:attr/textAppearanceLarge" />        


<EditText        
android:id="@+id/datumInput"        
android:layout_width="match_parent"        
android:layout_height="wrap_content"        
android:ems="10"        
android:inputType="date" /> 
</LinearLayout>

public class MainActivity extends Activity implements OnClickListener {private Button button1;
final Context context = this;


@Override
protected void onCreate(Bundle savedInstanceState) 
{super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button1 = (Button) findViewById(R.id.button1);
button1.setOnClickListener(this);
}


@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}


@Override
public void onClick(View v) {
LayoutInflater li = LayoutInflater.from(context);
final View promptsView = li.inflate(R.layout.prompts, null);
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(context);
alertDialogBuilder.setView(promptsView);
alertDialogBuilder.setCancelable(true).setPositiveButton("OK", new DialogInterface.OnClickListener() {


@Override
public void onClick(DialogInterface dialog, int which) {
//TextView tv1 = (TextView) findViewById(R.id.textView1);
//String value = kat.getText().toString();
//EditText kat = (EditText) findViewById(R.id.kategorieInput);
//String katout = kat.getText().toString();
//tv1.setText(""+katout);
//String kat = promptsView.toString();
//tv1.setText("" + katout);
}
}).setNegativeButton("Cancel",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();}});
AlertDialog alertDialog = alertDialogBuilder.create();
alertDialog.show();
}
}