部分键盘删除键无法响应onkeyListener事件，包括google原生键盘

部分键盘del键无法响应onkeyListener事件，包括google原生键盘

之前我们想要在EditText中监听软件盘都会使用以下方法

editText.setOnKeyListener(new OnKeyListener() {
                @Override
                public boolean onKey(View v, int keyCode, KeyEvent event) {
                    if (keyCode == KeyEvent.KEYCODE_DEL && event.getAction() == KeyEvent.ACTION_DOWN) {
                        //点击了删除键
                    }
                    return false
                }
            });

但是在实际使用中会发现部分键盘是不相应这个事件的，比如华为和vivo键盘

自定义EditText重写InputConnectionWrapper

public class CodeInputEditText extends EditText {

    private OnDelKeyEventListener delKeyEventListener;

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

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

    public CodeInputEditText(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    @Override
    public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
        return new ZanyInputConnection(super.onCreateInputConnection(outAttrs), true,this);
    }
    /**
    *重写InputConnectionWrapper
    */
    private class ZanyInputConnection extends InputConnectionWrapper {
        CodeInputEditText editText;
        public ZanyInputConnection(InputConnection target, boolean mutable, CodeInputEditText editText) {
            super(target, mutable);
            this.editText = editText;
        }
        /**
        * 重新 sendKeyEnvent 通过监听通知外部删除键被点击
        */
        @Override
        public boolean sendKeyEvent(KeyEvent event) {
            if (event.getAction() == KeyEvent.ACTION_DOWN && event.getKeyCode() == KeyEvent.KEYCODE_DEL) {
                if (delKeyEventListener != null) {
                    delKeyEventListener.onDeleteClick(editText);
                }
            }
            return super.sendKeyEvent(event);
        }
        /**
        *这个方法必需写在有些情况下删除键只会调用该方法，不会调用sendKeyEvent需要手动调用下
        */
        @Override
        public boolean deleteSurroundingText(int beforeLength, int afterLength) {
            sendKeyEvent(new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_DEL));
            return super.deleteSurroundingText(beforeLength, afterLength);
        }
    }

    public void setDelKeyEventListener(OnDelKeyEventListener delKeyEventListener) {
        this.delKeyEventListener = delKeyEventListener;
    }

    public interface OnDelKeyEventListener {

        void onDeleteClick(CodeInputEditText editText);

    }

}

来源：CSDN

作者：金鳞化龙

链接：https://blog.csdn.net/qq_22157767/article/details/104135923