Question

这是我的代码：

public class CustomSwipeAdaptor extends PagerAdapter {

    private int[] image_resources={R.drawable.aa,R.drawable.bb,R.drawable.cc};
    private Context ctx;
    private LayoutInflater layoutInflater;

    public CustomSwipeAdaptor(Context ctx)
    {
        this.ctx=ctx;
    }

    @Override
    public int getCount() {
        return image_resources.length;
    }

    @Override
    public boolean isViewFromObject(View view, Object object) {
        return (view==(LinearLayout)object);
    }

    @Override
    public Object instantiateItem(ViewGroup container, int position) {
        layoutInflater=(LayoutInflater)ctx.getSystemService(Context.LAYOUT_INFLATER_SERVICE );
        View item_view=layoutInflater.inflate(R.layout.swipe_layout,container,false);
        ImageView imageView=(ImageView)item_view.findViewById(R.id.image_view);
        imageView.setImageResource(image_resources[position]);
        container.addView(item_view);
        return item_view;
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        container.removeView((LinearLayout)object);
    }
}


public class Chapter1 extends AppCompatActivity{

    ViewPager viewPager;
    CustomSwipeAdaptor adaptor;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_chapter1);
        viewPager=(ViewPager)findViewById(R.id.view_pager);
        adaptor=new CustomSwipeAdaptor(this);
        viewPager.setAdapter(adaptor);
    }


}

这是我的logcat：

06-12 18:45:05.631 341-349/com.example.kips.itapps W/art: Suspending all threads took: 7.170ms 
06-12 18:45:27.677 341-349/com.example.kips.itapps W/art: Suspending all threads took: 6.168ms 
06-12 18:47:31.577 341-349/com.example.kips.itapps W/art: Suspending all threads took: 7.052ms 
06-12 18:48:36.275 341-349/com.example.kips.itapps W/art: Suspending all threads took: 5.650ms 
06-12 18:56:21.208 341-349/com.example.kips.itapps W/art: Suspending all threads took: 8.523ms

Answer 1

这在很大程度上是无害的。来自here

Java代码堆是一个共享资源。对于ART中的GC暂停，必须暂停线程，以便它们不会更改堆和打破GC不变量。暂停线程局部变量的线程由GC修改，然后线程观察到这种变化和放弃变异锁定，然后GC将保持锁定独家经营。当线程被挂起而其他线程被挂起放弃他们对变种锁的份额，这对于jank来说很重要线程及时响应。 5ms几乎是16ms的1/3 当线程悬挂缓慢时，ART会发出警告。作为+ Aladin Q说这可能会带来很多负担。如果它发生了经常，或没有负载，它可能是可能的错误的证据因为jank。

除非您遇到严重问题阻止您的应用实现其目标，否则它是良性的，以及several other similar log outputs。

为什么我的应用程序暂停线程，我该如何解决这个问题？

1 个答案: