EditText editText = (EditText) findViewById(R.id.editText1);
editText.setKeyListener(null);

public class EditTextTest extends Activity
{
  /** test EditText forbid input function demo */
  EditText editText;
  boolean flag = true;
  public void onCreate(Bundle savedInstanceState)
  {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    editText = (EditText) findViewById(R.id.editText1);
    Button btn = (Button) findViewById(R.id.button1);
    btn.setOnClickListener(new OnClickListener()
    {
      public void onClick(View v)
      {
        if (flag==true)
        {
          System.out.println("开启软键盘");
           editText.setInputType(InputType.TYPE_CLASS_TEXT);
          flag = false;
        }else
        {
          System.out.println("禁止软键盘");
           editText.setInputType(InputType.TYPE_NULL);
          flag = true;
        }
      }
    });
  }
}