[Android studio] Section 18 Implementing ListView click event

Table of contents

 

1. Implementation steps?

2. Usage steps

1.demo

1. Implementation steps?

To implement the click event of ListView, you can follow the following steps:

1. Set up the adapter for ListView:

ListView listView = findViewById(R.id.listView);
listView.setAdapter(adapter); // adapter 是你自定义的适配器对象

1. Set a click event listener for a list item:

listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        // 在这里处理点击事件，根据需要执行相应的操作
        Object item = parent.getItemAtPosition(position); // 获取点击的列表项数据对象
        // 执行其他操作...
    }
});

In onItemClickthe method, you can write logic to handle click events according to specific needs. Get the position of the clicked list item through positionthe parameter. If necessary, you can also parent.getItemAtPosition(position)get the data object corresponding to the clicked list item through.

Through the above code, you can implement the click event of ListView. When the user clicks on the list item, the corresponding operation will be triggered. Remember to R.id.listViewreplace with the ID of the ListView control in your layout file, and adjust the code and logic according to the actual situation.

2. Usage steps

1.demo

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <ListView
        android:id="@+id/list_item"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        />

</RelativeLayout>

public class ReadWordTable extends AppCompatActivity {

    private String[] data = {"a","b","c","d","e","f"};
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.layout_ad);
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(ReadWordTable.this,android.R.layout.simple_list_item_1,data);
        ListView listView = (ListView) findViewById(R.id.list_item);
        listView.setAdapter(adapter);
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                Toast.makeText((Context) ReadWordTable.this, (String) listView.getItemAtPosition(i),Toast.LENGTH_LONG).show();
            }
        });
    }


}