I am creating a dynamic array of buttons, but i am getting Nullpointer Exception. Why? My sample code is:
Button addAsFriend[];
for( i=0;i<c.getCount();i++)
{
addAsFriend[i]=new Button(this);
}
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3 Answers
Because you didn´t initialized your array, try this:
Button addAsFriend[] = new Button[c.getCount()];
for( i=0;i<c.getCount();i++)
{
addAsFriend[i] = new Button(this);
}
1 Comment
rakeshmenon
how can i implement the click events for each button in this array
You aren't initializing the array itself, only the elements inside? See line 2:
Button addAsFriend[];
addAsFriend = new Button[c.GetCount()];
for( i=0;i<c.getCount();i++)
{
addAsFriend[i]=new Button(this);
}
Edit: Pretty silly of me to delete this.
Comments
The following code should help you out:
Button[] b = new Button[9];
b[0] = (Button) findViewById(R.id.button1);
b[1] = (Button) findViewById(R.id.button2);
b[2] = (Button) findViewById(R.id.button3);
b[3] = (Button) findViewById(R.id.button4);
b[4] = (Button) findViewById(R.id.button5);
b[5] = (Button) findViewById(R.id.button6);
b[6] = (Button) findViewById(R.id.button7);
b[7] = (Button) findViewById(R.id.button8);
b[8] = (Button) findViewById(R.id.button9);
