複数のEditTextにたいして、TextWatcherをしかけてみた

HogeActivity

/**
 * Created by togu on 2013/07/23.
 */
public class HogeActivity extends Activity {

    EditText editText1;
    EditText editText2;
    Button bomb;
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
        setContentView(R.layout.fuga);
        
        editText1 = (EditText) findViewById(R.id.edit_text1);
        editText1.addTextChangedListener(new GenericTextWatcher(editText1));

        editText2 = (EditText) findViewById(R.id.edit_text2);
        editText2.addTextChangedListener(new GenericTextWatcher(editText2));
        
        //簡単には押せないのだ
        bomb = (Button) findViewById(R.id.bomb);
        bomb.setEnabled(false);
    }

    private class GenericTextWatcher implements TextWatcher {

        private View view;

        private GenericTextWatcher(View view) {
            this.view = view;
        }

        public void beforeTextChanged(CharSequence s, int start, int count, int after) {}

        public void onTextChanged(CharSequence s, int start, int before, int count) {
            switch (view.getId()) {
                case R.id.edit_text1:
                    
                    //入力してくれないと、このボタン押せないんだからね
                    if (s.length() > 0) {
                        bomb.setEnabled(true);
                    } else {
                        next.setEnabled(false);
                    }
                    break;
                case R.id.edit_text2:
                    
                    //別にif文じゃなくてもよいし、入力文字数の条件をかえてもよいし、
                    //ボタンタップ条件を他のEditTextとからめても良いよ
                    break;
            }
        }

        public void afterTextChanged(Editable editable) {
        }

    }

}