RelativeLayout的带按钮 [英] RelativeLayout with buttons
本文介绍了RelativeLayout的带按钮的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我要添加按钮的数量来动态RelativeLayout的,但我的code不起作用。它增加了它们在显示器上的相同位置。
I want to add number of buttons to RelativeLayout dynamically, but my code doesn't work. It adds them to the same place on the display.
private void createButtons() {
buttons = new ArrayList<Button>();
RelativeLayout bg = (RelativeLayout) findViewById(R.id.Bg);
RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
for(int i = 0; i < channels.size(); i++){
Button newButton = new Button(this);
newButton.setId(i);
newButton.setText(channels.get(i).getTitle());
buttons.add(newButton);
if(i > 0){
lp.addRule(RelativeLayout.RIGHT_OF, i-1);
bg.addView(newButton, lp);
}else{
bg.addView(newButton);
}
}
}
我应该怎么修复,使其工作?
What should I fix to make it work?
推荐答案
您有几个问题。首先,你需要为每个按钮,以避免@rogerkk指出问题后创建布局新布局PARAMS。其次,你要使用一个零的ID为第一个按钮。这是行不通的。
You have a couple of problem. First off, you need to create layout new layout params for each button to avoid the problem that @rogerkk pointed out. Second, you are trying to use an ID of zero for the first button. This will not work.
下面是解决这两个问题的函数的返工。
Here is a rework of the function that fixes these two problems.
private void createButtons() {
buttons = new ArrayList<Button>();
RelativeLayout bg = (RelativeLayout) findViewById(R.id.Bg);
for(int i = 0; i < channels.size(); i++){
Button newButton = new Button(this);
newButton.setId(i+1); // ID of zero will not work
newButton.setText(channels.get(i).getTitle());
buttons.add(newButton);
// New layout params for each button
RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
if(i > 0){
// using getId() here in case you change how you assign IDs
int id =buttons.get(i-1).getId();
lp.addRule(RelativeLayout.RIGHT_OF, id);
}
bg.addView(newButton,lp);
}
}
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