EditText动态转换只读/编辑状态

public class MyActivity extends Activity
{
    private KeyListener listener;
    private EditText editText;

    public void onCreate(...)
    {
        editText = ... // Get EditText from somewhere
        listener = editText.getKeyListener(); // Save the default KeyListener!!!
        editText.setKeyListener(null); // Disable input
    }

    // When you click your button, restore the default KeyListener
    public void buttonClickHandler(...)
    {
        editText.setKeyListener(listener);
    }
}

Basically, you first save the EditText's default KeyListener before you call setKeyListener(null). Then, when you click your button, you call setKeyListener again, passing the default listener you previously saved.

以上是来自http://stackoverflow.com/questions/10933056/edit-text-key-listener问题中rainai的回答

好用。