Flutter 升級到1.17之后的爬坑記

網(wǎng)上有很多升級到1.12之后的適配問題秃嗜，可以參考 Flutter升級到1.12填坑指南

目前的flutter的版本是Flutter 1.17.5 ? channel stable
升級后activity的基類使用了io.flutter.embedding.android.FlutterFragmentActivity
遇到的坑：程序啟動后直接閃退澎羞，查看log提示：

No view found for id 0x245a3c5c (unknown) for fragment FlutterFragment{id=0x245a3c5c flutter_fragment}

由于不熟悉Flutter妆绞，還以為是我打開Fragment的姿勢不對，于是百度了好久括饶，找到各種打開Fragment的姿勢来涨，最終都沒有解決問題。于是還是自己乖乖的斷點(diǎn)調(diào)試技羔，最終在FlutterFragmentActivity中的onCreate中發(fā)現(xiàn)

@Override
  protected void onCreate(@Nullable Bundle savedInstanceState) {
    switchLaunchThemeForNormalTheme();
    super.onCreate(savedInstanceState);
    configureWindowForTransparency();
    setContentView(createFragmentContainer());
    configureStatusBarForFullscreenFlutterExperience();
    ensureFlutterFragmentCreated();
  }

private View createFragmentContainer() {
    FrameLayout container = new FrameLayout(this);
    container.setId(FRAGMENT_CONTAINER_ID);
    container.setLayoutParams(
        new ViewGroup.LayoutParams(
            ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
    return container;
  }

private void ensureFlutterFragmentCreated() {
    FragmentManager fragmentManager = getSupportFragmentManager();
    flutterFragment = (FlutterFragment) fragmentManager.findFragmentByTag(TAG_FLUTTER_FRAGMENT);
    if (flutterFragment == null) {
      // No FlutterFragment exists yet. This must be the initial Activity creation. We will create
      // and add a new FlutterFragment to this Activity.
      flutterFragment = createFlutterFragment();
      fragmentManager
          .beginTransaction()
          .add(FRAGMENT_CONTAINER_ID, flutterFragment, TAG_FLUTTER_FRAGMENT)
          .commit();
    }
  }

onCreate中會自己設(shè)置contentView，那我之前自己設(shè)置的contentView會把基類的覆蓋鳖粟，ensureFlutterFragmentCreated中添加的fragment會找不到ContainerView 拙绊。所以在自己APP的基類中添加一個ID為FRAGMENT_CONTAINER_ID的view，并設(shè)置為隱藏就OK了

 @SuppressLint("ResourceType")
    private void addNoVisibleFragment()
    {
        View view = new FrameLayout(this);
        // 這個ID是在FlutterFragmentActivity中定義的數(shù)值
        // 在FlutterFragmentActivity中會把view作為contentView
        // 但是在咱們自己的APP中會重新設(shè)置contentView
        // 所以添加一個隱藏的contentView榄攀，防止由于找不到view導(dǎo)致閃退
        view.setId(609893468);
        ViewGroup.LayoutParams params = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
        addContentView(view, params);
        view.setVisibility(View.GONE);
    }

最后還是鄙視一下Flutter檩赢，搞這么大的坑

?著作權(quán)歸作者所有,轉(zhuǎn)載或內(nèi)容合作請聯(lián)系作者