自定义带删除按钮的EditText

最新推荐文章于 2025-09-11 22:10:09 发布

转载最新推荐文章于 2025-09-11 22:10:09 发布 · 71 阅读

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原文链接：https://my.oschina.net/u/3705875/blog/1840632

文章标签：

#python

本文介绍了一种自定义的EditText组件实现方案，该组件具备根据输入状态显示清除图标的功能，用户点击图标即可清空输入框内容。文章通过具体代码展示了如何在Android应用中创建并使用这种组件。

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public class ClearEditText extends AppCompatEditText {
    private static final int DRAWABLE_LEFT = 0;
    private static final int DRAWABLE_TOP = 1;
    private static final int DRAWABLE_RIGHT = 2;
    private static final int DRAWABLE_BOTTOM = 3;
    private Drawable mClearDrawable;

    public ClearEditText(Context context) {
        super(context);
        init();
    }

    public ClearEditText(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    public ClearEditText(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    private void init() {
        mClearDrawable = getResources().getDrawable(R.mipmap.delete);
    }

    @Override
    protected void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
        super.onTextChanged(text, start, lengthBefore, lengthAfter);
        setClearIconVisible(hasFocus() && text.length() > 0);
    }

    @Override
    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
        super.onFocusChanged(focused, direction, previouslyFocusedRect);
        setClearIconVisible(focused && length() > 0);
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        switch (event.getAction()) {
            case MotionEvent.ACTION_UP:
                Drawable drawable = getCompoundDrawables()[DRAWABLE_RIGHT];
                if (drawable != null && event.getX() <= (getWidth() - getPaddingRight())
                        && event.getX() >= (getWidth() - getPaddingRight() - drawable.getBounds().width())) {
                    setText("");
                }
                break;
        }
        return super.onTouchEvent(event);
    }

    private void setClearIconVisible(boolean visible) {
        setCompoundDrawablesWithIntrinsicBounds(getCompoundDrawables()[DRAWABLE_LEFT], getCompoundDrawables()[DRAWABLE_TOP],
                visible ? mClearDrawable : null, getCompoundDrawables()[DRAWABLE_BOTTOM]);
    }
}

转载于:https://my.oschina.net/u/3705875/blog/1840632