1.不实时显示已经写入字体
etEvaluateContent.addTextChangedListener(new TextWatcher() {@Overridepublic void beforeTextChanged(CharSequence s, int start, int count, int after) {}@Overridepublic void onTextChanged(CharSequence s, int start, int before, int count) {if (s.toString().trim().length() > maxLength) {etEvaluateContent.setText(s.toString().substring(0, maxLength));etEvaluateContent.setSelection(maxLength);ToastUtil.showToastWithImg("您最多能输入200个字", R.mipmap.toast_error);}}@Overridepublic void afterTextChanged(Editable s) {}});
2.实时显示已经写入字体个数
etSuggestContent.addTextChangedListener(new TextWatcher() {CharSequence input;@Overridepublic void beforeTextChanged(CharSequence s, int start, int count, int after) {input = s;}@Overridepublic void onTextChanged(CharSequence s, int start, int before, int count) {tvMaxCount.setText(String.format("%d/200", input.length()));if (input.length() > 199) {ToastUtil.showToastWithImg("您最多能输入200个字", R.mipmap.toast_error);}}@Overridepublic void afterTextChanged(Editable s) {}});
注意：以上两种类型方案均需要在xml文件中设置最大字数属性(maxLength)。
<EditTextandroid:id="@+id/et_suggest_content"style="@style/text_normal_light"android:layout_width="0dp"android:layout_height="141dp"android:layout_marginTop="@dimen/dp_10"android:background="@color/white"android:gravity="top"android:hint="您可以在这里给我们建议帮助我们做的更好"android:maxLength="200"android:paddingBottom="@dimen/dp_27"android:paddingLeft="@dimen/app_margin"android:paddingRight="@dimen/app_margin"android:paddingTop="@dimen/dp_10"android:textColorHint="@color/hint"app:layout_constraintLeft_toLeftOf="parent"app:layout_constraintRight_toRightOf="parent"app:layout_constraintTop_toTopOf="parent"/>
