I try to switch pages using custom controls. I read this tutorial: composite controls now I use a Cardview and LinearLayout to put the button in it, but I can t do it. so I followed this tutorial: put the code to dynamically add page fragments ...
problem description if the onResume event of the second page is triggered when the first page is opened, the onResume of the third page will trigger the fragment. The life cycle of the fragment is onAttach ()-> onCreate ()-> onCreateView ()-> onActivi...
I don t know how to start the title. < ( ^ ) > how can input, in document fragments created by document.createDocumentFragment modify the content in input through JavaScript? if you modify it directly through the value property, the prompt "Pleas...
pages made with fragment+recyclerview+glide+cradview, in which the pictures of recyclerview cannot be filled up after they are transferred to the screen. cardview, when this is a landscape screen, the picture is only centered, not full of cardview. ...
simpleadapter is called in the fragment tabhost tab of Androidstudio. where item.setAdapter (simpleAdapter) reported null pointer error? ...
in practice, follow the br that the book knocks out step by step. call the replace method here to create an anonymous inner class. Ide has this error. this method is contained in the following class . class MyOnCheckedChangListener implements R...
<template> <div> <button @click="changeObj">click< button> < div> < template> <script> export default { name: "HelloWorld", data() { return { msg: "Welcome to Your V...
mysql reported these errors after upgrading to 5.7. seems to be a system table corruption? I checked some information and used mysql_upgrade, but it didn t seem to work. can someone tell me how to solve it? ...
Only the following entries are allowed in the input box: a) only Chinese characters are allowed: I love you ; b) 26 English letters are allowed, including uppercase and lowercase c) spaces. ? ! ;:, () the above characters are all full-width characte...
NULL data in the database Angular DB Angular console.log(): NULL Angular :this.expandForm.setValue({...val[0]});: valoordercode after processing by the above method, you can assign the value that exists on the DB side to when all the attribut...
I wrote a static web page and found that there is an unclear line spacing between ul and li my css code is as follows .article ul{ margin: 17px; padding: 5px; line-height: 3px; } .article ol{ margin: 17px; padding: 5px; line-h...