Re: [androidbrasil-dev] Duvidas em um app

Olá estou com uma duvida , estou criando um app que calcula matrizes , fiz um layout simples com 

[xmlpublic class MainActivity extends Activity implements OnClickListener{

EditText Text1,Text2;

Button   Btcalcula;

   

@Override

    protected void onCreate(Bundle savedInstanceState) {

       

 super.onCreate(savedInstanceState);

       

 setContentView(R.layout.activity_main);

       

 Text1=(EditText)  findViewById(R.id.Text1);

       

 Text2=(EditText)  findViewById(R.id.Text2);

       

 Btcalcula=(Button) findViewById(R.id.Btcalcula);

        

Btcalcula.setOnClickListener(new View.OnClickListener(){

@Override

public void onClick(View arg0) {

double num1 = Double.parseDouble(      

Text1.getText().toString());             

      

 [/xml]

e esse é o codigo em java da matriz que seria uma decomposição em LU

[JAVA]/**

   * LU Decomposition, a structure to access L, U and piv.

   * 

   * @param A

   *            Rectangular matrix

   */

  public LUDecomposition(Matrix A) {

    // Use a "left-looking", dot-product, Crout/Doolittle algorithm.

    LU = A.getArrayCopy();

    m = A.getRowDimension();

    n = A.getColumnDimension();

    piv = new int[m];

    for (int i = 0; i < m; i++) {

      piv[i] = i;

    }

    pivsign = 1;

    double[] LUrowi;

    double[] LUcolj = new double[m];

    // Outer loop.

    for (int j = 0; j < n; j++) {

      // Make a copy of the j-th column to localize references.

      for (int i = 0; i < m; i++) {

        LUcolj[i] = LU[i][j];

      }

      // Apply previous transformations.

      for (int i = 0; i < m; i++) {

        LUrowi = LU[i];

        // Most of the time is spent in the following dot product.

        int kmax = Math.min(i, j);

        double s = 0.0;

        for (int k = 0; k < kmax; k++) {

          s += LUrowi[k] * LUcolj[k];

        }

        LUrowi[j] = LUcolj[i] -= s;

      }

      // Find pivot and exchange if necessary.

      int p = j;

      for (int i = j + 1; i < m; i++) {

        if (Math.abs(LUcolj[i]) > Math.abs(LUcolj[p])) {

          p = i;

        }

      }

      if (p != j) {

        for (int k = 0; k < n; k++) {

          double t = LU[p][k];

          LU[p][k] = LU[j][k];

          LU[j][k] = t;

        }

        int k = piv[p];

        piv[p] = piv[j];

        piv[j] = k;

        pivsign = -pivsign;

      }

      // Compute multipliers.

      if (j < m & LU[j][j] != 0.0) {

        for (int i = j + 1; i < m; i++) {

          LU[i][j] /= LU[j][j];

        }

      }

    }

  }

 [/JAVA]

gostaria de inserir esta formula bara o button calcular.

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