I'm trying to create a simple application in which there are 30 buttons and I need to initialize their text field. I created this array of buttons:
Button[][] buttons_arr = new Button[10][3];
To change each button's text I did :
for(i=0..9) //psaudo
for (j=0..29) //psaudo
buttons_arr[i][j].setText(toString(some_int));
The last line is causing some problems. Why and what can I do to solve this issue ?
You are actually looping in 300 times instead of 30 times
try like this
for(i=0..9) //psaudo
for (j=0..2) //psaudo
buttons_arr[i][j].setText(""+some_int);
Try this:
Button[][] b=new Button[10][3];
for(int i=0;i<10;i++)
{
for(int j=0;j<3;j++)
{
b[i][j]=new Button(context);
b[i][j].setText("something");
}
}
I have not tried 2D arrays. But my experience with a similar problem seems to be that buttons_arr[i][j] is still uninitialized. You need to either create a new button:
buttons_arr[1][1] = new Button();
or
buttons_arr[1][1] = (Button)findViewById(R.id.buttonAtPosition1_1);
try this
for(int i=0;i<10;i++){
for(int j=0;j<3;j++)
buttons_arr[i][j].setText(your text);
}
