Android——“EditText控件供获取最大长度的方法”
package utils;
import android.app.Activity;
import android.content.Context;
import android.text.InputFilter;
import android.view.View;
import android.view.inputmethod.InputMethodManager;
import android.widget.EditText;
import java.lang.reflect.Field;
/**
* “EditText控件供获取最大长度的方法”
*/
public class ViewUtil {
public static int getMaxLength(EditText et) {
int length = 0;
try {
InputFilter[] inputFilters = et.getFilters();
for (InputFilter filter : inputFilters) {
Class<?> c = filter.getClass();
if (c.getName().equals("android.text.InputFilter$LengthFilter")) {
Field[] f = c.getDeclaredFields();
for (Field field : f) {
if (field.getName().equals("mMax")) {
field.setAccessible(true);
length = (Integer) field.get(filter);
}
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
return length;
}
public static void hideAllInputMethod(Activity act) {
InputMethodManager imm = (InputMethodManager) act.getSystemService(Context.INPUT_METHOD_SERVICE);
//软键盘如果已经打开则关闭之
if (imm.isActive() == true) {
imm.toggleSoftInput(0, InputMethodManager.HIDE_NOT_ALWAYS);
}
}
public static void hideOneInputMethod(Activity act, View v) {
InputMethodManager imm = (InputMethodManager) act.getSystemService(Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(v.getWindowToken(), 0);
}
}
posted on 2022-08-11 19:54 JavaCoderPan 阅读(50) 评论(0) 编辑 收藏 举报 来源