android:button="@null"

/**
 * Created by fby on 2017/9/11.
 */

public class ChargepsdActivity extends Activity {

  private EditText editText;
  private CheckBox checkBox;

  @Override
  protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_chargepsd);

    editText = (EditText) findViewById(R.id.newpassword);
    checkBox = (CheckBox) findViewById(R.id.CheckBox);

    checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
      @Override
      public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {

        if(isChecked){
          //如果选中，显示密码
          editText.setTransformationMethod(HideReturnsTransformationMethod.getInstance());
        }else{
          //否则隐藏密码
          editText.setTransformationMethod(PasswordTransformationMethod.getInstance());

        }

      }
    });

  }
}