The ListView of custom subitem is mainly to implement the item column defining ListView. ListView Implementation of Custom Subitem Next, we are going to implement ListView of custom sub-items. The basic idea of ListView implementation is clear and not difficult. this, android.R.layout.simple_list_item1, city) Īs you can see, this constructor takes three parameters, the first is the Context type, which is passed into MainActivity.this, and the second is an Item layout that Android comes with, which can be understood as a small bar with only one TextView.įinally, the mListView variable is used to put the adapter in. MArrayAdapter = new ArrayAdapter(MainActivity. Since ListView uses Adapter as the input list variable, you need to create a new Adapter type variable and associate it with this String type list: private ArrayAdapter mArrayAdapter You can write more in this variable so that the List will be longer. The code is as follows: private String city = Then create a new array of String type, each variable of which is each Item. M圜ityListView = findViewById (R.id.list_view) Īfter completing this step, you can imagine that there is no Item in ListView, right. The core code is as follows: private MyListView m圜ityListView Then, since a control is placed, a new ListView control is created in MainActivity, and the control variable is associated with the change control by using the control id. The above is a simple control layout, but also the simplest property settings, without explanation Ignore the process of building new projects.įirst of all, since it is a control, it is natural to add ListView control in the main layout. Next, we start with the implementation of the simplest ListVeiw.Įnvironment: Android Studio Basic ListView Implementation To write a custom ListView, first of all, we need to have the most basic understanding of ListView. ListView Implementation of Custom Subitem.True Question is mainly divided into three parts to introduce the custom ListView: Fortunately, now I can finally write it myself, so here I record the process of writing a custom ListView, to provide a train of thought, hoping to help some beginners. I need to know that I can understand the program, but after leaving the book, I find that I can't write it out.
To be honest, the use of this control really made me feel awkward for a while. Android ListView is probably the most commonly used and difficult control in Android.
0 kommentar(er)
