Question

I’m trying to add 24 buttons with a for-loop. I’m trying to place four equally sized buttons per row and hoping to see the next group of four to appear below them.

How can I achieve this?

My not-working effort so far looks like this:

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        ScrollView sv = new ScrollView(this);
        LinearLayout layout = new LinearLayout(this);
        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams
                  (LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
        layout.setWeightSum(12.0f);
        params.weight = 3.0f;
        layout.setOrientation(LinearLayout.HORIZONTAL);
        sv.addView(layout);
        for (int i = 0; i < 24; i++) {
            Button btn = new Button(this);
            btn.setText("Button");
            btn.setLayoutParams(params);
            layout.addView(btn);
        }
        this.setContentView(sv);
    }

Any help appreciated.

Answer 1

This is how you add the Buttons like you want:

    layout.setOrientation(LinearLayout.VERTICAL);
    sv.addView(layout);
    for (int i = 0; i < 6; i++) {
         Linearlayout row = new LinearLayout(this);
         row.setLayoutParams(new LinearLayout.LayoutParams
                  (LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT));    
         for (int  j = 0; j < 4; j++) {
                Button btn = new Button(this);
                LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams
                  (LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
                lp.weight = 1; 
                btn.setLayoutParams(lp); 
                btn.setText("Button");
                btn.setLayoutParams(params);
                row.addView(btn);
         }
         layout.addView(row);
    }
    this.setContentView(sv);