EditText设置 drawableRight 、left、t

记录

代码动态设置

有文本的时候显示删除按钮 没有文本的时候 隐藏删除按钮

 et_searching.addTextChangedListener(object : TextWatcher{
            override fun beforeTextChanged(p0: CharSequence?, p1: Int, p2: Int, p3: Int) {

            }

            override fun onTextChanged(p0: CharSequence?, p1: Int, p2: Int, p3: Int) {
                if(p0.toString().length>1){
                    et_searching.setCompoundDrawablesWithIntrinsicBounds(resources.getDrawable(R.mipmap.common_search),null,resources.getDrawable(R.mipmap.icon_clear_et),null)
                }else {
                    et_searching.setCompoundDrawablesWithIntrinsicBounds(resources.getDrawable(R.mipmap.common_search),null,null,null)
                }
            }

            override fun afterTextChanged(p0: Editable?) {

            }


        })

删除按钮的监听

  et_searching.setOnTouchListener(object : View.OnTouchListener {
                override fun onTouch(v: View?, event: MotionEvent?): Boolean {
                    var drawable: Drawable? = et_searching.compoundDrawables[2]
                        ?: return false // et.getCompoundDrawables()得到一个长度为4的数组，分别表示左右上下四张图片
                    //如果右边没有图片，不再处理
                    //如果不是按下事件，不再处理
                    if (event!!.action != MotionEvent.ACTION_UP) return false
                    if (event.x > (et_searching.width
                                - et_searching.paddingRight
                                - drawable?.intrinsicWidth!!)
                    ) {
                        et_searching.setText("")
                    }
                    return false
                }

            })