[英]Android - Nested Handler / Runnable
我的应用程序内容部分代码太多。 大约有 3000 行 XML 代码。 这导致我的应用程序启动缓慢。 (在大约 8 秒内启动)我将内容放在 6 个视图存根对象中。 我创建了很多处理程序。 这是个问题吗? 它在层次上是否正确? 我怎样才能完成所有这些处理程序操作 asynctask。
另外我怎样才能让我的内容更轻、更快。
提前致谢!
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
viewStubPager.setLayoutResource(R.layout.viewstubpager);
coachStubPager = viewStubPager.inflate();
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
viewStub1.setLayoutResource(R.layout.viewstub1);
coachStub1 = viewStub1.inflate();
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
viewStub2.setLayoutResource(R.layout.viewstub2);
coachStub2 = viewStub2.inflate();
viewStub3.setLayoutResource(R.layout.viewstub3);
coachStub3 = viewStub3.inflate();
viewStub4.setLayoutResource(R.layout.viewstub4);
coachStub4 = viewStub4.inflate();
viewStub5.setLayoutResource(R.layout.viewstub5);
coachStub5 = viewStub5.inflate();
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
Objects.requireNonNull(notificationManager).cancelAll();
sharedPreferencesKeys();
initialize();
calculate();
sharedPrefStartup();
alertDialogClickListener();
changeListener();
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
layouts = new int[]{R.layout.vki_slide1, R.layout.vki_slide2, R.layout.vki_slide3, R.layout.vki_slide4, R.layout.vki_slide5, R.layout.vki_slide6, R.layout.vki_slide7, R.layout.vki_slide8, R.layout.vki_slide9};
VKIPagerAdapter = new MyViewPagerAdapter();
vkipager.setAdapter(VKIPagerAdapter);
VKIPagerAdapter.notifyDataSetChanged();
vkipager.setOffscreenPageLimit(10);
vkipager.addOnPageChangeListener(viewPagerPageChangeListener);
pageIndicator.setCount(layouts.length);
pageIndicator.setSelection(0);
bottombar.setVisibility(View.VISIBLE);
}
}, 100);
}
}, 100);
}
}, 100);
}
}, 100);
}
}, 150);
有点晚了,但这可能会帮助其他人......
我不知道问题中的代码是否会在我提出的解决方案中更快地启动(我怀疑会是这种情况),但是,它更具可读性并且只使用一个 Runnable。 这也可以用于动画。
我从以下答案中得出了这个例子: https : //stackoverflow.com/a/11198037/6423246
Handler mHandler = new Handler();
int inflater = YOUR_CONSTANT_1;
void yourFunction() {
// ...your first inflater code here...
mHandler.postDelayed(mRunnable, your_delay_in_millis);
}
Runnable mRunnable = new Runnable() {
@Override
public void run() {
switch(inflater) {
case YOUR_CONSTANT_1 : {
// ...your second inflater code here...
inflater = YOUR_CONSTANT_2;
mHandler.postDelayed(mRunnable, your_delay_in_millis);
break;
}
case YOUR_CONSTANT_2 : {
// ...your third inflater code here...
inflater = YOUR_CONSTANT_3;
mHandler.postDelayed(mRunnable, your_delay_in_millis);
break;
}
// etcetera
case YOUR_CONSTANT_LAST : {
// ...your last inflater code here...
// in your final case, you could opt to remove callbacks
mHandler.removeCallbacks(mRunnable);
break;
}
}
}
};
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