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?Hybrid???????????????Hybrid????????????????????????????????????????????<->???????<->??????????Hybrid???????????????

?Hybrid???????????????????????????????????????????????????????????????????????????????????????????????????

?????????????????????????????????????????????????????????????????

UI ????

?????????UI???

A?UI????????UI??????

???????

A?UI??????????????????UI??????UI?????????????????UI?????????????????????????????

?????????UI??????????????????

A??Activity??????Activity???????????????UI?????Activity.runOnUiThread????UI??????????????????UI?????????

runOnUiThread????

public final void runOnUiThread(Runnable action) {    if (Thread.currentThread() != mUiThread) {        mHandler.post(action);    } else {        action.run();    }}

????????????UI???????????mHandler.post????????????mHandler???Activity???????????Activity?????new Handler()??????????????Handler??Looper???????????mHandler??????

mUiThread???

?Activity?attach???????????

final void attach(Context context, ...) {    //??????    mUiThread = Thread.currentThread();}

?Activity.attach??????????????mUiThread???Activity?attach?????????????mUiThread??????????

???????????UI????????

A????????????????????????UI?????????

????

ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.

??????????View???????????View??????ViewRootImpl????????????????????????View.post????????

ViewRootImpl?????

Activity????????????ActivityThread.handleResumeActivity??????Activity?DecorView???WindowManager??????ViewRootImpl?

?????????????View??

A???????????ViewRootImpl?????????View??WindowManager.addView?????????????ViewRootImpl????????????WindowManager.addView??????View????????????????????View?UI???

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???????????????????????????????PDF???????????????????Android??????????????????

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