問題描述

我為我的一個活動創建了一個布局，用戶可以在其中在一些 EditText 小部件中插入一個值.我需要其中一些 EditText 必須具有不可編輯的后綴(如 cm、mm 等).用戶插入值后，我將解析這些 EditText 的內容，避免使用后綴，因此我將處理唯一沒有后綴的輸入.該怎么做?

i created a layout for one of my activities in which users can insert a value in some EditText widget. I need that some of these EditText must have a suffix (like cm, mm and so on) that has to be not editable. After the user has inserted the value i will parse the content of these EditText avoiding the suffix so i will handle the only input without the suffix. How to do that?

我已經在 SO 上進行了搜索和搜索，但沒有任何幫助.我發現像這樣的答案 https://stackoverflow.com/a/20794581/2516399 對我沒有幫助.

I have already searched and searched here on SO but nothing helped me. I found answers like this one https://stackoverflow.com/a/20794581/2516399 that don't help me.

我希望我的問題很清楚......對不起我的英語

I hope i was clear in my question... sorry for my english

推薦答案

這是我的解決方案:一個在文本后面繪制后綴的 EditText 類.有兩個自定義屬性用于定義后綴的文本和后綴填充(到 EditText 的左角).

This is my solution: An EditText class that draws the suffix behind the text. There are two custom attributes for defining the text of the suffix and the suffix padding (to the left corner of the EditText).

public class EditTextWithSuffix extends EditText {
    TextPaint textPaint = new TextPaint();
    private String suffix = "";
    private float suffixPadding;

    public EditTextWithSuffix(Context context) {
        super(context);
    }

    public EditTextWithSuffix(Context context, AttributeSet attrs) {
        super(context, attrs);
        getAttributes(context, attrs, 0);
    }

    public EditTextWithSuffix(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        getAttributes(context, attrs, defStyleAttr);
    }

    @Override
    public void onDraw(Canvas c){
        super.onDraw(c);
        int suffixXPosition = (int) textPaint.measureText(getText().toString()) + getPaddingLeft();
        c.drawText(suffix, Math.max(suffixXPosition, suffixPadding), getBaseline(), textPaint);
    }

    @Override
    protected void onFinishInflate() {
        super.onFinishInflate();
        textPaint.setColor(getCurrentTextColor());
        textPaint.setTextSize(getTextSize());
        textPaint.setTextAlign(Paint.Align.LEFT);
    }

    private void getAttributes(Context context, AttributeSet attrs, int defStyleAttr) {
        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.EditTextWithSuffix, defStyleAttr, 0);
        if(a != null) {
            suffix = a.getString(R.styleable.EditTextWithSuffix_suffix);
            if(suffix == null) {
                suffix = "";
            }
            suffixPadding = a.getDimension(R.styleable.EditTextWithSuffix_suffixPadding, 0);
        }
        a.recycle();
    }
}

這是屬性定義:

<resources>
    <declare-styleable name="EditTextWithSuffix">
        <attr name="suffix" format="string|reference" />
        <attr name="suffixPadding" format="dimension" />
    </declare-styleable>
</resources>

這篇關于帶有不可編輯/不可取消后綴的 EditText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！