Help when entering several data in Android

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Help when entering several data in Android

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#1 by (0 votes)

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I need help loading several data using a TextView, I'm doing a project that I was asked at the University is the subject Operational Research I do not know if you already know but I have to do a project for that matter, my problem is that I know how I can enter various data to my application

Where it says number of variables as I enter the number of variables and where it says number of restrictions as I enter the number of restrictions.

Once I enter the number of variables and the number of restrictions I want internally to create a matrix with the values that I enter, in this case in the image introduced: number of variables: 2 and number of restrictions: 2 so which should create a 2x2 matrix and I want that every time I press the LOAD button every data that I enter in the EditText is loaded in the matrix that was created. In Java Eclipse it would be something like this:

for(int i=0;i<2;i++){
    for(int j=0;j<2;j++){
        matriz[i][j]=JOptionPane.showInputDialog("Ingrese un numero");
    }
}

With that I quietly charge it in the matrix but how can I do something like this in Android Studio ??? I hope you have understood me, I was as clear as possible, I hope your answers ... Thank you.

java android

asked by eyllanesc 07.01.2017 в 03:27

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1 answer

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score 0 · Answer 1

It would stay that way with the approach you want to use:

for(int i=0;i<2;i++){
    for(int j=0;j<2;j++){
        matrixInput(matriz,i,j,"Ingrese un numero:");
    }
}

where you define the matrixInput function like this:

void matrixInput(final double [][] matriz,final int i,final int j,String msg) {
    final EditText txtNum = new EditText(this);
    new AlertDialog.Builder(this)
            .setTitle("Ingrese un numero:")
            .setMessage(msg)
            .setView(txtNum)                
            .setPositiveButton("Ingresar", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int whichButton) {
                    String num = txtNum.getText().toString();
                    try {
                        matriz[i][j] = Double.valueOf(num);
                    }catch (NumberFormatException nf){
                        matrixInput(matriz,i,j,"Repita el numero, el formato es incorrecto");
                    }
                }
            }
            ).show();
}

Should validate that they do not cancel the dialogue, although this is not the best approach in terms of UI design or use JOptionPane.showInputDialog for four or more values