密码隐藏与显示

<RelativeLayout

    android:layout_width="wrap_content"

    android:layout_height="wrap_content">

    <EditText

        android:id="@+id/activity_logo_edit_password"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_marginLeft="30dp"

        android:layout_marginRight="30dp"

        android:layout_marginTop="@dimen/margin_top"

        android:hint="请输入密码"

        android:inputType="textPassword"

        android:textColorHint="@color/colorWhite" />

    <ImageButton

        android:id="@+id/activity_login_seePassword"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:background="@drawable/design_ic_visibility"

        android:layout_alignRight="@+id/activity_logo_edit_password"

        android:layout_margin="20dp"

            />

</RelativeLayout>

case R.id.activity_login_seePassword:

                if (!flag) {

                    // display password text, for example "123456"

                    editPassword.setTransformationMethod(HideReturnsTransformationMethod.getInstance());

                    eyeButton.setBackground(getResources().getDrawable(R.drawable.design_ic_visibility_off));

                } else {

                    // hide password, display "."

                    editPassword.setTransformationMethod(PasswordTransformationMethod.getInstance());

                    eyeButton.setBackground(getResources().getDrawable(R.drawable.design_ic_visibility));

                }

                flag = !flag;

                editPassword.postInvalidate();
                break;