直接上代碼

package cn.yhsh.keyeventdemo;import android.text.InputFilter; import android.text.Spanned;/*** @author xiayiye* @date 2022/4/2 13:23*/public class SearchKeyWorldLengthFilter implements InputFilter {private final int mMax;public SearchKeyWorldLengthFilter(int max) {mMax = max;}@Overridepublic CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) {int keep = mMax - (dest.length() - (dend - dstart));if (keep <= 0) {//這里，用來給用戶提示,當(dāng)然可以替換成 更加優(yōu)雅的形式if (null != lengthListener) {lengthListener.pass();}return "";} else if (keep >= end - start) {return null;} else {keep += start;if (Character.isHighSurrogate(source.charAt(keep - 1))) {--keep;if (keep == start) {return "";}}return source.subSequence(start, keep);}}public interface LengthListener {void pass();}LengthListener lengthListener;public void setLengthListener(LengthListener lengthListener) {this.lengthListener = lengthListener;} }

使用方法如下：

SearchKeyWorldLengthFilter searchKeyWorldLengthFilter = new SearchKeyWorldLengthFilter(10);editText.setFilters(new InputFilter[]{searchKeyWorldLengthFilter});

非常簡單,超出字符直接就不能輸入了,還可以吐司提示

總結(jié)

以上是生活随笔為你收集整理的Android开发之限制输入框长度 | 限制EditText输入长度 | 限制AppCompatEditText长度的方法的全部內(nèi)容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網(wǎng)站內(nèi)容還不錯，歡迎將生活随笔推薦給好友。