色色小说

Demo Xia + Diao Shen Xia: These two are put together to say, after all, there are 50 steps calling the kettle black, and no one is much better than anyone. Of course, don't belittle yourself. Everyone came from this stage. At this stage, those who are not good at programming will practice programming well, and those who do not understand the principles will read books and understand the principles. Doing it by hand is the first thing, and then constantly changing the parameters of some models, looking at the changes in the effect, then looking at the mathematical derivation behind it, and understanding the reasons, which is much better than looking at the derivation of a lot of mathematical formulas first, and starting to write code in a dizzy way."Where I hope the company can improve"她看着葫芦两眼闪亮，小声问道：这个……送我的？说着，还左右瞧了瞧，生怕有人来看见。　　恋人绝情，寡妇多情，爱人真情，三个女人一个硬汉，演绎着人间真善美、假丑恶。D > B enters the synchronized block, and since instance is not null at this time, it immediately leaves the synchronized block and returns the result to the program calling the method. E > At this point, thread B intends to use the Singleton instance, only to find that it has not been initialized, so an error occurs. Therefore, there is still the possibility of errors in the program. In fact, the running process of the program is very complicated. From this, we can see that it is more difficult and challenging to write programs especially in multi-threaded environment. We further optimized the program:The top ViewGroup here is MainActivity (DecorView). First, the down event is sent to the child view, then the child view does not consume it, and then it is handed over to the parent view for consumption layer by layer. Finally, no one consumes it back to MainActivity, and the down event ends. From the above source code analysis, it can be seen that the mFirstTouchTarget is empty at this time. If the move event comes, the else interception event of the source code number 2 part will be directly executed, so the log of the subsequent event will not be distributed as above (and the log of the onInterceptTouchEvent () method will not be called at the same time). If the child view consumes the down event, mFirstTouchTarget is not empty, and the process of subsequent events is similar to down. Readers can modify MyView's onTouchEvent () to consume the down event and try to consume the down event.