droidss droidss - 1 month ago 17
Java Question

OnClickListener and Table Layout

I have an Activity with two layouts, both implemented in R.layout.main. The first one is a Relative Layout with the app's main screen, and the other is a Table Layout, holding a kind of Preferences Screen. Normally, the first one is set to visible, and the second one to gone. By clicking a button I make the Relative Layout gone, and the Table Layout visible.
And here starts my problem, I wanted to set a OnClickListener to that Table Layout (which is actually an array of buttons).
I tried something like:

final TableLayout table = (TableLayout)findViewById(R.id.tab);
table.setOnClickListener(new OnClickListener(){
public void onClick(View arg){
Button clickedButton = (Button)arg;
String t = (String) clickedButton.getTag();

Toast toast = Toast.makeText(getApplicationContext(),t,Toast.LENGTH_SHORT);
toast.show();

}
});


Obviously, it doesn't work.
I'm quite new to Android programming, and I've been looking for a suitable solution for the whole day without any results.

Answer

It couldn't work because you are first trying to cast a TableLayout to a button... if your TableLayout is only containing buttons you could do something like:

TableLayout yourRootLayout = findView....
int count = yourRootLayout.getChildCount();
for(int i = 0; i < count; i++){
    View v = yourRootLayout.getChildAt(i);
    if(v instanceof TableRow){
        TableRow row = (TableRow)v;
        int rowCount = row.getChildCount();
        for (int r = 0; r < rowCount; r++){
            View v2 = row.getChildAt(r);
            if (v2 instanceof Button){
                Button b = (Button)v2;
                b.setOnClickListener(this);
            }
        }
    }
}

and let your activity implement OnClickListener. Just copy your Existing onClick into Activity itself...