EditText with number keypad by default, but allowing alphabetic characters

Define your EditText in your xml this way:

<EditText 
    android:id="@+id/txtOppCodigoCliente"
    android:inputType="textVisiblePassword"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:maxLength="11"
    android:hint="@string/strCodigoCliente"/>

output: android:inputType="textVisiblePassword"

A row of numbers and the rest of letters.

I would suggest a more Robust solution:

Present the user with the ability to choose the input type:

NEEDED FIXES

-better handling of showing/hiding the input selection buttons

-probably remove the suggestions when the input type is letter

Here is the activity:

package mobi.sherif.numberstexttextview;

import android.os.Bundle;
import android.app.Activity;
import android.text.InputType;
import android.view.View;
import android.view.View.OnFocusChangeListener;
import android.widget.EditText;

public class MainActivity extends Activity {

    EditText mEdit;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mEdit = (EditText) findViewById(R.id.input);
        mEdit.setOnFocusChangeListener(new OnFocusChangeListener() {

            @Override
            public void onFocusChange(View view, boolean focused) {
                findViewById(R.id.llmenu).setVisibility(focused?View.VISIBLE:View.GONE);
            }
        });
    }

    public void onNumbers(View v) {
        mEdit.setInputType(InputType.TYPE_CLASS_NUMBER);
    }

    public void onLetters(View v) {
        mEdit.setInputType(InputType.TYPE_CLASS_TEXT);
    }

}

Here is the activity's xml : activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <ScrollView
        android:id="@+id/scrollview"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_alignWithParentIfMissing="true"
        android:layout_above="@+id/llmenu" >

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content" >

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

                <requestFocus />
            </EditText>
        </LinearLayout>
    </ScrollView>

    <LinearLayout
        android:id="@+id/llmenu"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:background="#000000"
        android:padding="0dp" >

        <Button
            android:id="@+id/buttonnumbers"
            android:layout_width="0dp"
            android:onClick="onNumbers"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:text="Numbers" />

        <Button
            android:id="@+id/buttonletters"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:onClick="onLetters"
            android:text="Letters" />
    </LinearLayout>

</RelativeLayout>

Here is what you are looking for:

Define your EditText in your xml this way:

<EditText
    android:id="@+id/etTest"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:ems="10"
    android:hint="@string/hint">

</EditText>

And call following in your onCreate():

etTest = (EditText) findViewById(R.id.etTest);
etTest.setRawInputType(InputType.TYPE_CLASS_NUMBER);
// Note the "Raw"

Whenever you click into your EditText now, you can enter digits AND letters! (Digit keyboard is shown first)