rs和android之间的数据传输？

我正在使用渲染脚本。我想传递数组元素以渲染脚本和 要对渲染脚本中的每个元素执行平方运算，并将数据返回到 android框架

我正试图通过以下代码来实现这一点

1.java代码 2.RS代码

但是通过这些代码，这是不可能的。请告诉我我在做什么 用这些代码

============================================================================

java代码 =========================================================== RS码

有几件事：

1-我发现.rs文件不能与.java文件同名

2-您在根函数（*v_out）上声明了一个输出变量，但从未在函数内部计算它

3-您的java数组都是int。从上的幂函数声明中，它们都至少接受一个浮点作为输入

以下是我的java代码：

    public class Sum extends Activity {
    private float[] input;
    private float[] output;
    private RenderScript mRS;
    private Allocation mInAllocation;
    private Allocation mOutAllocation;
    private TextView t1;
    private ScriptC_Square mScript;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_sum);
        t1= new TextView(this);
        t1= (TextView)findViewById(R.id.textview1);

        input= new float[4];
        input[0]=0;
        input[1]=1;
        input[2]=2;
        input[3]=3;
        output =new float[input.length];
        createScript();
    }

    private void createScript() {
        mRS = RenderScript.create(this);

        mInAllocation    = Allocation.createSized(mRS, Element.F32(mRS),4);
        mOutAllocation   = Allocation.createTyped(mRS,mInAllocation.getType());
        mScript = new ScriptC_Square(mRS, getResources(), R.raw.square);

        mInAllocation.copyFrom(input);
        mScript.forEach_root(mInAllocation, mOutAllocation); // calls the forEach function to operate on the root function (each allocation input, will have a corresponding allocation output
        mOutAllocation.copyTo(output); // copy the result that was stored in mOutAllocation into the array output

        t1.setText(String.format("Input:%s\n\noutput:%s",
                                    ArrayToString(input), ArrayToString(output)));
    }


    /**
     * this function just print each element of a primitive float array into a text string
     * @param array
     * @return
     */
    public String ArrayToString(float[] array){

        String s="";
        for(int i=0; i<array.length; i++){
            s+= String.format("\nValue %d: %f", i, array[i]);
        }

        return s;
    }

}

有几件事：

1-我发现.rs文件不能与.java文件同名

2-您在根函数（*v_out）上声明了一个输出变量，但从未在函数内部计算它

3-您的java数组都是int。从上的幂函数声明中，它们都至少接受一个浮点作为输入

以下是我的java代码：

    public class Sum extends Activity {
    private float[] input;
    private float[] output;
    private RenderScript mRS;
    private Allocation mInAllocation;
    private Allocation mOutAllocation;
    private TextView t1;
    private ScriptC_Square mScript;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_sum);
        t1= new TextView(this);
        t1= (TextView)findViewById(R.id.textview1);

        input= new float[4];
        input[0]=0;
        input[1]=1;
        input[2]=2;
        input[3]=3;
        output =new float[input.length];
        createScript();
    }

    private void createScript() {
        mRS = RenderScript.create(this);

        mInAllocation    = Allocation.createSized(mRS, Element.F32(mRS),4);
        mOutAllocation   = Allocation.createTyped(mRS,mInAllocation.getType());
        mScript = new ScriptC_Square(mRS, getResources(), R.raw.square);

        mInAllocation.copyFrom(input);
        mScript.forEach_root(mInAllocation, mOutAllocation); // calls the forEach function to operate on the root function (each allocation input, will have a corresponding allocation output
        mOutAllocation.copyTo(output); // copy the result that was stored in mOutAllocation into the array output

        t1.setText(String.format("Input:%s\n\noutput:%s",
                                    ArrayToString(input), ArrayToString(output)));
    }


    /**
     * this function just print each element of a primitive float array into a text string
     * @param array
     * @return
     */
    public String ArrayToString(float[] array){

        String s="";
        for(int i=0; i<array.length; i++){
            s+= String.format("\nValue %d: %f", i, array[i]);
        }

        return s;
    }

}

---

如果想继续使用int而不是float，只需执行“return*v_-in**v_-in；”。在上面的代码中，您还需要切换到2.f而不是2，因为这意味着一个double->float转换（C99语言最糟糕的方面之一）。如果您想继续使用int而不是float，您可以执行“return*v_In**v_In；”。在上面的代码中，您还希望切换到2.f而不是2，因为这意味着双->浮点转换（C99语言最糟糕的方面之一）。

    public class Sum extends Activity {
    private float[] input;
    private float[] output;
    private RenderScript mRS;
    private Allocation mInAllocation;
    private Allocation mOutAllocation;
    private TextView t1;
    private ScriptC_Square mScript;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_sum);
        t1= new TextView(this);
        t1= (TextView)findViewById(R.id.textview1);

        input= new float[4];
        input[0]=0;
        input[1]=1;
        input[2]=2;
        input[3]=3;
        output =new float[input.length];
        createScript();
    }

    private void createScript() {
        mRS = RenderScript.create(this);

        mInAllocation    = Allocation.createSized(mRS, Element.F32(mRS),4);
        mOutAllocation   = Allocation.createTyped(mRS,mInAllocation.getType());
        mScript = new ScriptC_Square(mRS, getResources(), R.raw.square);

        mInAllocation.copyFrom(input);
        mScript.forEach_root(mInAllocation, mOutAllocation); // calls the forEach function to operate on the root function (each allocation input, will have a corresponding allocation output
        mOutAllocation.copyTo(output); // copy the result that was stored in mOutAllocation into the array output

        t1.setText(String.format("Input:%s\n\noutput:%s",
                                    ArrayToString(input), ArrayToString(output)));
    }


    /**
     * this function just print each element of a primitive float array into a text string
     * @param array
     * @return
     */
    public String ArrayToString(float[] array){

        String s="";
        for(int i=0; i<array.length; i++){
            s+= String.format("\nValue %d: %f", i, array[i]);
        }

        return s;
    }

}

#pragma version(1)
#pragma rs java_package_name(com.example.sum)//don't forget to change that package name

void root(const float *v_in, float  *v_out ){

    *v_out = pow(*v_in, 2); //use the internal pow function of Renderscript pow(float x, float y) = x ^y;

 }