alert_dialog_text_entry.xml

<?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="wrap_content"
    android:orientation="vertical">

    <TextView 
        android:id="@+id/devicename_view"
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        android:layout_marginLeft="20dip"
        android:layout_marginRight="20dip"
        android:text="@string/alert_dialog_devicename"
        android:gravity="left"
        android:textAppearance="?android:attr/textAppearanceMedium" />
            
    <EditText
        android:id="@+id/devicename_edit"
        android:layout_height="wrap_content"
        android:layout_width="fill_parent"
        android:layout_marginLeft="20dip"
        android:layout_marginRight="20dip"
        android:scrollHorizontally="true"
        android:autoText="false"
        android:capitalize="none"
        android:gravity="fill_horizontal"
        android:textAppearance="?android:attr/textAppearanceMedium" />

</LinearLayout>

AlertdialogDisplay.java

//showing and editing AlertDialog with EditText		
LayoutInflater factory = LayoutInflater.from(this);
		final View textEntryView = factory.inflate(R.layout.alert_dialog_text_entry, null);
		myAlertDialog = new AlertDialog.Builder(this)
		.setTitle(R.string.alert_dialog_title)
		.setView(textEntryView)
		.setPositiveButton("OK", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int whichButton) {
                    	EditText et = (EditText) ShowProjectsActivity.myAlertDialog.findViewById(R.id.devicename_edit);
                    	deviceName = et.getText().toString();
                        Log.i(TAG, deviceName);
                        if (comm.registerDevice(appKey, imei, deviceName)){
                        	Utils.showToast(ShowProjectsActivity.this, R.string.device_registered);
                        }else {
                        	Utils.showToast(ShowProjectsActivity.this, R.string.device__not_registered);
                        }
                        ShowProjectsActivity.this.finish();
                    }
                })
                .setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int whichButton) {

                        /* User clicked cancel so do nothing*/
                    }
                }).create();
		myAlertDialog.show();