問題描述

我想讓 use 只輸入 5 行，我試過了

I want to allow use to enter just 5 lines, I tried this

<EditText
    android:layout_below="@+id/tv_signup_descriptionError"
    android:id="@+id/et_signup_description"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="5dip"
    android:hint="@string/et_hint_enterDescription"
    android:singleLine="false"
    android:lines="5"
    android:gravity="top"
    android:scrollHorizontally="false"
    android:inputType="textMultiLine" 
    android:maxLines="5"/>

但我仍然可以在第五行之后按 Enter

but still I can press Enter after the fifth line

推薦答案

你不能使用任何 XML 屬性來做到這一點.

You cannot do that using any XML attributes.

maxlines代表EditText的最大高度，不是輸入行數.

maxlines represents the maximum height of the EditText and not the number of input lines.

但是，您可以實現自己的代碼來檢查行數.

You can however implement your own code to check for the number of lines.

以下是不是我自己的代碼，而是取自 這個答案.

mEditText.setOnKeyListener(new View.OnKeyListener() {

        @Override
        public boolean onKey(View v, int keyCode, KeyEvent event) {

            // if enter is pressed start calculating
            if (keyCode == KeyEvent.KEYCODE_ENTER
                    && event.getAction() == KeyEvent.ACTION_UP) {

                // get EditText text
                String text = ((EditText) v).getText().toString();

                // find how many rows it cointains
                editTextRowCount = text.split("\n").length;

                // user has input more than limited - lets do something
                // about that
                if (editTextRowCount >= 7) {

                    // find the last break
                    int lastBreakIndex = text.lastIndexOf("
");

                    // compose new text
                    String newText = text.substring(0, lastBreakIndex);

                    // add new text - delete old one and append new one
                    // (append because I want the cursor to be at the end)
                    ((EditText) v).setText("");
                    ((EditText) v).append(newText);

                }
            }

            return false;
        }

這篇關于android如何在edittext中制作文本完全固定的行的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！