从非片段/活动类调用registerForActivityResult

Question

我想从我的Fragment之外的Java类调用registerForActivityResult。这样做有可能吗？

在这里你可以看到我的意思的一个例子：

public class Hello
{
    private ActivityResultLauncher<String[]> mMultipleActivityResultLauncher =
        registerForActivityResult(new ActivityResultContracts.RequestMultiplePermissions(), isGranted ->{
            
        });
}

Answer 1

您需要将Activity/Fragment实例传递给该类，并对其调用registerForActivityResult。

例如，基于您的代码(对于Activity，只需将Fragment的所有实例替换为Activity)：

public class Hello {
    private Fragment fragment;
    private ActivityResultLauncher<String[]> mMultipleActivityResultLauncher;

    public Hello(Fragment fragment) {
        this.fragment = fragment;
        this.mMultipleActivityResultLauncher = fragment.registerForActivityResult(
                new ActivityResultContracts.RequestMultiplePermissions(), isGranted -> {

        });
    }
}