android布局优化的一些实用建议

val start = System.currentTimeMillis()
setContentView(R.layout.activity_layout_optimize)
val inflateTime = System.currentTimeMillis() - start

    @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();
        }
        Log.i("aop inflate",name + " cost " + (System.currentTimeMillis() - time));
    }

    public final View tryCreateView(@Nullable View parent, @NonNull String name,
        ...
        View view;
        if (mFactory2 != null) {
            view = mFactory2.onCreateView(parent, name, context, attrs);
        } else if (mFactory != null) {
            view = mFactory.onCreateView(name, context, attrs);
        } else {
            view = null;
        }
        ...
        return view;
    }

    private fun initItemInflateListener(){
        LayoutInflaterCompat.setFactory2(layoutInflater, object : Factory2 {
            override fun onCreateView(
                parent: View&＃63;,
                name: String,
                context: Context,
                attrs: AttributeSet
            ): View&＃63; {
                val time = System.currentTimeMillis()
                val view = delegate.createView(parent, name, context, attrs)
                Log.i("inflate Item",name + " cost " + (System.currentTimeMillis() - time))
                return view
            }

            override fun onCreateView(name: String, context: Context, attrs: AttributeSet): View&＃63; {
                return null
            }
        })
    }

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        new AsyncLayoutInflater(AsyncLayoutActivity.this)
                .inflate(R.layout.async_layout, null, new AsyncLayoutInflater.OnInflateFinishedListener() {
                    @Override
                    public void onInflateFinished(View view, int resid, ViewGroup parent) {
                        setContentView(view);
                    }
                });
        // 别的操作
    }

<&＃63;xml version="1.0" encoding="utf-8"&＃63;>


  

  

public class X2C_2131296281_Activity_Main implements IViewCreator {
  @Override
  public View createView(Context ctx, int layoutId) {
        Resources res = ctx.getResources();

        RelativeLayout relativeLayout0 = new RelativeLayout(ctx);
        relativeLayout0.setPadding((int)(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,10,res.getDisplayMetrics())),0,0,0);

        View view1 =(View) new X2C_2131296283_Head().createView(ctx,0);
        RelativeLayout.LayoutParams layoutParam1 = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,ViewGroup.LayoutParams.WRAP_CONTENT);
        view1.setLayoutParams(layoutParam1);
        relativeLayout0.addView(view1);
        view1.setId(R.id.head);
        layoutParam1.addRule(RelativeLayout.CENTER_HORIZONTAL,RelativeLayout.TRUE);

        ImageView imageView2 = new ImageView(ctx);
        RelativeLayout.LayoutParams layoutParam2 = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,(int)(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,1,res.getDisplayMetrics())));
        imageView2.setLayoutParams(layoutParam2);
        relativeLayout0.addView(imageView2);
        imageView2.setId(R.id.ccc);
        layoutParam2.addRule(RelativeLayout.BELOW,R.id.head);

        return relativeLayout0;
  }
}

// this.setContentView(R.layout.activity_main);
X2C.setContentView(this, R.layout.activity_main);

class MyActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle&＃63;, persistentState: PersistableBundle&＃63;) {
        super.onCreate(savedInstanceState, persistentState)
        MyActivityUI().setContentView(this)
    }
}

class MyActivityUI : AnkoComponent {
    override fun createView(ui: AnkoContext) = with(ui) {
        verticalLayout {
            val name = editText()
            button("Say Hello") {
                onClick { ctx.toast("Hello, ${name.text}!") }
            }
        }
    }
}