编译renderscript源$ C ​​$ C [英] Compiling renderscript source code

问题描述

我在previous文章中提到（编译renderscript code。在运行时），我尝试在运行时编译renderscript code。
正如Kietz建议我需要改变，从所有生成的Java类的派生类ScriptC。
使我自己的类扩展，因为我不能调用此超类的构造函数脚本失败。

As I mentioned in my previous post (Compiling renderscript code at runtime), I try to compile renderscript code at runtime. As suggested by Kietz I need to alter the ScriptC class from which all generated java classes derive. Making my own class that extends Script fails because I cannot invoke the constructor of this super class.

在code的这段代码

public class RuntimeScriptC extends Script {
       private static final String TAG = "RuntimeScriptC";

   protected RuntimeScriptC(int id, RenderScript rs) {            
       super(id, rs);       

   }

给我这个错误：

The constructor Script(int, RenderScript) is undefined

我的下一个想法是我自己的类添加到renderscript源$ C ​​$ c和编译它来创建
一个新的.jar。我发现混帐但不知道如何只建立renderscript包。

My next idea was to add my own class to the renderscript source code and compile it to create a new .jar. I found the source code on git but have no idea how to only build the renderscript package.

编辑：
我刚刚发现 Script.java 的构造函数是包专用。这就是为什么我不能在我自己的类访问的构造函数。如果我可以编译renderscript来源自己，我可以把我自己的类到包和访问它。

I just found out that the constructor of Script.java is package private. That's why I can't access the constructor in my own class. If I can compile the renderscript sources myself I could place my own class into the package and access it.

新的问题：我在哪里可以找到renderscript来源，我怎么能编译它们

推荐答案

RenderScript的源代码可以在<一个发现href=\"https://android.googlesource.com/platform/frameworks/base/+/master/rs/java/android/renderscript\"相对=nofollow> android.googlesource.com ，与Android的其余部分一起。如果要重建Android或它的一部分，这里可能是一个好地方启动。

RenderScript's source can be found at android.googlesource.com, along with that of the rest of Android. If you want to rebuild Android or a part of it, here is probably a good place to start.

然而，这是矫枉过正。如果你不能修改 ScriptC 直接，只是继承它。因为您从 ScriptC 是其受保护的构造需要的唯一方法这是可能的。比如，我写了 HackedScriptC 它什么都不做，但提出其论点 ScriptC（）：

However, that is overkill. If you can't modify ScriptC directly, just inherit from it. This is possible because the only methods you need from ScriptC are its protected constructors. For example, I wrote HackedScriptC which does nothing but forward its arguments to ScriptC():

package com.example.android.rs.extremehax;

import android.content.res.Resources;
import android.renderscript.RenderScript;
import android.renderscript.ScriptC;

public class HackedScriptC extends ScriptC {

    public HackedScriptC(RenderScript rs, Resources resources, int id) {
        // simple passthru to the only constructor that ScriptC_mono uses
        super(rs, resources, id);
    }

}

它现在可以在胶类代替 ScriptC ：

package com.example.android.rs.extremehax;
// ...     
public class ScriptC_mono extends HackedScriptC { 
    // otherwise identical glue class...

在你的情况，你就不会调用超级构造 ScriptC（RenderScript，资源，INT），因为调用 internalCreate ，要重写。相反，调用 ScriptC（INT，RenderScript）。

In your case, you would not invoke the super constructor ScriptC(RenderScript,Resources,int) because that invokes internalCreate, which you want to override. Instead, invoke ScriptC(int,RenderScript).

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