小编Geo*_*org的帖子

我正在尝试使用以下内容中的撰写视图填充底部对话框AppCompatActivity：

val bottomSheet = BottomSheetDialog(this)

bottomSheet.setContentView(ComposeView(this).apply {
    setContent {
        MaterialTheme {
            Test()
        }
    }
})

bottomSheet.show()

使用androidx.fragment:fragment-ktx:1.4.0-alpha10，androidx.appcompat:appcompat:1.3.1

出现以下异常：

    java.lang.IllegalStateException: ViewTreeLifecycleOwner not found from android.widget.FrameLayout{386906d V.E...... ......I. 0,0-0,0 #7f0900d3 app:id/container}
        at androidx.compose.ui.platform.WindowRecomposer_androidKt.createLifecycleAwareViewTreeRecomposer(WindowRecomposer.android.kt:244)
        at androidx.compose.ui.platform.WindowRecomposer_androidKt.access$createLifecycleAwareViewTreeRecomposer(WindowRecomposer.android.kt:1)
        at androidx.compose.ui.platform.WindowRecomposerFactory$Companion$LifecycleAware$1.createRecomposer(WindowRecomposer.android.kt:99)
        at androidx.compose.ui.platform.WindowRecomposerPolicy.createAndInstallWindowRecomposer$ui_release(WindowRecomposer.android.kt:155)
        at androidx.compose.ui.platform.WindowRecomposer_androidKt.getWindowRecomposer(WindowRecomposer.android.kt:230)
        at androidx.compose.ui.platform.AbstractComposeView.resolveParentCompositionContext(ComposeView.android.kt:220)
        at androidx.compose.ui.platform.AbstractComposeView.ensureCompositionCreated(ComposeView.android.kt:227)
        at androidx.compose.ui.platform.AbstractComposeView.onAttachedToWindow(ComposeView.android.kt:259)
        at android.view.View.dispatchAttachedToWindow(View.java:19553)
...

我想知道这是否可以作为流函数更整洁地编写:

MyObject myObject = new MyObject();

for (Thing thing : listofThings) {
    myObject = myObject.combine(thing);
}

我是C的新手,我在使用结构时遇到了麻烦.我有以下代码:

typedef struct uint8array {
 uint8 len;
 uint8 data[];
} uint8array;

int compare_uint8array(uint8array* arr1, uint8array* arr2) {
  printf("%i %i\n data: %i, %i\n", arr1->len, arr2->len, arr1->data[0], arr2->data[0]);
  if (arr1->len != arr2->len) return 1;
  return 0;
  }

int compuint8ArrayTest() {
 printf("--compuint8ArrayTest--\n");
 uint8array arr1;
 arr1.len = 2;
 arr1.data[0] = 3;
 arr1.data[1] = 5;    

 uint8array arr2;
 arr2.len = 4;
 arr2.data[0] = 3;
 arr2.data[1] = 5;    
 arr2.data[2] = 7;    
 arr2.data[3] = 1;    

 assert(compare_uint8array(&arr1, &arr2) != 0);
}

现在这个程序的输出是:

 --compuint8ArrayTest--
 3 4
 data: 5, 3

为什么值不是我初始化它们的值？我在这里错过了什么？