常规方式

背景:获取每个界面加载耗时

实现：覆写方法、手动埋点

AOP/ArtHook

AOP实现

切Activity的setContentView

@Aspect
public class PerformanceAop {
    @Around("execution(* android.app.Activity.setContentView(..))")
    public void getSetContentViewTime(ProceedingJoinPoint joinPoint) {
        Signature signature = joinPoint.getSignature();
        String name = signature.toShortString();
        long time = System.currentTimeMillis();
        try {
            joinPoint.proceed();
        } catch (Throwable throwable) {
            throwable.printStackTrace();
        }
        LogUtils.i(name + " cost " + (System.currentTimeMillis() - time));
    }
}

获取任一控件耗时

低侵入性

protected void onCreate(Bundle savedInstanceState) {
        LayoutInflaterCompat.setFactory2(getLayoutInflater(), new LayoutInflater.Factory2() {
            @Override
            public View onCreateView(View parent, String name, Context context, AttributeSet attrs) {
                long time = System.currentTimeMillis();
                View view = getDelegate().createView(parent, name, context, attrs);
                LogUtils.i(name + " cost " + (System.currentTimeMillis() - time));
                return view;
            }

            @Override
            public View onCreateView(String name, Context context, AttributeSet attrs) {
                return null;
            }
        });
        super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
  //..
    }