FragmentTransaction`commit（）`執行

Question

我已經梳理了GrepCode和下載的源代碼，但是我找不到一個FragmentTransaction類的實現。是否有人指向我的源代碼？

Answer 1

Here是可能的實現之一。

類的簽名如下所示：

final class BackStackRecord extends FragmentTransaction implements FragmentManager.BackStackEntry, Runnable {...} 

在grep的代碼，你可以點擊小箭頭指向下方旁邊的類名找到派生類。

只是爲了讓這個答案完整：

int commitInternal(boolean allowStateLoss) { 
    if (mCommitted) { 
     throw new IllegalStateException("commit already called"); 
    } 
    if (FragmentManagerImpl.DEBUG) { 
     Log.v(TAG, "Commit: " + this); 
     LogWriter logw = new LogWriter(Log.VERBOSE, TAG); 
     PrintWriter pw = new FastPrintWriter(logw, false, 1024); 
     dump(" ", null, pw, null); 
     pw.flush(); 
    } 
    mCommitted = true; 
    if (mAddToBackStack) { 
     mIndex = mManager.allocBackStackIndex(this); 
    } else { 
     mIndex = -1; 
    } 
    mManager.enqueueAction(this, allowStateLoss); 
    return mIndex; 
} 

commitInternal由commit