Kotlin：我如何检查该应用程序是否已经打开过一次？

Question

我正在 Flutter 中构建一个应用程序，需要运行 Kotlin 中的一段代码来检查该应用程序是否是第一个运行。

我发现这是 Java 中的代码，但我该如何在 Kotlin 中实现它？

public class MyActivity extends Activity {

    SharedPreferences prefs = null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // Perhaps set content view here

        prefs = getSharedPreferences("com.mycompany.myAppName", MODE_PRIVATE);
    }

    @Override
    protected void onResume() {
        super.onResume();

        if (prefs.getBoolean("firstrun", true)) {
            // Do first run stuff here then set 'firstrun' as false
            // using the following line to edit/commit prefs
            prefs.edit().putBoolean("firstrun", false).commit();
        }
    }
}

Answer 1

其实很简单:

class MainActivity : Activity() {

    private lateinit var sharedPrefs: SharedPreferences
    
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        sharedPrefs = getSharedPreferences(packageName, MODE_PRIVATE)
    }
    
    override fun onResume() {
        super.onResume()
        if (sharedPrefs.getBoolean("firstRun", true)){
            sharedPrefs.edit().putBoolean("firstrun", false).commit()
        }
    }

}

Kotlin：我如何检查该应用程序是否已经打开过一次？

Kotlin: how do i check if the app has already been opened once?

kotlin

sharedpreferences