如何找出包含特定字符串的项目被单击？

Question

我当前的代码从字符串数组中获取项目，但如何使用该数组对特定字符串执行特定操作？例如。如果我单击包含字符串“Anpan”的项目，我希望发生特定事件。

strings.xml

<resources>
    <string name="app_name">Breads</string>
    
    <!--Array (198 items)-->
    <string-array name="array_breads">
        <item>Aish merahrah</item>
        ...
        <item>Zwieback</item>
    </string-array>
</resources>

MainActivity.kt

class MainActivity : ComponentActivity() {
    private var itemArray: Array<String>? = null

    override fun onCreate(savedInstanceState: Bundle?) {
        itemArray = resources.getStringArray(R.array.array_breads)

        super.onCreate(savedInstanceState)
        setContent {
            AdaptiveTheme {
                // A surface container using the 'background' color from the theme
                Surface(
                    modifier = Modifier.fillMaxSize(),
                    color = MaterialTheme.colorScheme.background
                ) {
                    MyScaffold(itemArray = itemArray as Array<out String>)
                }
            }
        }
    }
}

@Composable
fun MyScaffold(itemArray: Array<out String>) {
    val context = LocalContext.current
    Scaffold(
        topBar = {
            SmallTopAppBar(
                title = {
                    Text(text = stringResource(id = R.string.breads))
                }
            )
        },
        content = {
            val listState = rememberLazyListState()

            LazyColumn(
                modifier = Modifier.fillMaxSize(),
                state = listState,
                contentPadding = PaddingValues(top = 64.dp, bottom = 80.dp),
                verticalArrangement = Arrangement.spacedBy(4.dp)
                ) {
                items(itemArray) { item ->
                    Text(modifier = Modifier.padding(16.dp), text = item,
                        style = MaterialTheme.typography.titleLarge)
                }
            }
        }
}

Answer 1

在您的文本组件上添加可点击修饰符：

LazyColumn(
                modifier = Modifier.fillMaxSize(),
                state = listState,
                contentPadding = PaddingValues(top = 64.dp, bottom = 80.dp),
                verticalArrangement = Arrangement.spacedBy(4.dp)
                ) {
                items(itemArray) { item ->
                    Text(modifier = Modifier
                            .padding(16.dp)
                            .clickable{// You can obtain 'item' here which item clicked.}, 
                         text = item,
                         style = MaterialTheme.typography.titleLarge)
                }
            }

Answer 2

这似乎太基础了，无法成为 post 但我们开始吧。

val comparableString = stringResource(R.string.anpan) //Initialise here

LazyColumn(
                modifier = Modifier.fillMaxSize(),
                state = listState,
                contentPadding = PaddingValues(top = 64.dp, bottom = 80.dp),
                verticalArrangement = Arrangement.spacedBy(4.dp)
                ) {
                items(itemArray) { item ->
                    Text(
                          modifier = Modifier
                                      .padding(16.dp)
                                      .clickable {
                                         if(item == comparableString) //Compare here
                                            performSpecificTask()
                                         else performGeneralTask()
                                      },
                        text = item,
                        style = MaterialTheme.typography.titleLarge)
                }
            }

此处doSpecificTask()和doGeneral...是指您希望在那边完成的任务。只是用你自己的代码块替换调用，只是为了清楚。

如何找出包含特定字符串的项目被单击？

How to find out which item containing a specific string was clicked?

android

kotlin

android-jetpack-compose