java 在android中获取按钮的ID
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Get Id of Button in android
提问by artouiros
I have a Button Adapter, i make 9 buttons in a gridview, then i set id for each button. BUt how do i use a button in another class, example: i need to change background of button with id 5. Here's my code
我有一个按钮适配器，我在网格视图中制作了 9 个按钮，然后我为每个按钮设置了 id。但是我如何在另一个类中使用按钮，例如：我需要更改 id 为 5 的按钮的背景。这是我的代码
public class ButtonAdapter extends BaseAdapter {
static Button btn;
private Context mContext;
// Gets the context so it can be used later
public ButtonAdapter(Context c) {
mContext = c;
}
// Total number of things contained within the adapter
public int getCount() {
return somestringarray.length;
}
// Require for structure, not really used in my code.
public Object getItem(int position) {
return null;
}
// Require for structure, not really used in my code. Can
// be used to get the id of an item in the adapter for
// manual control.
public long getItemId(int position) {
return position;
}
public View getView(int position,
View convertView, ViewGroup parent) {
if (convertView == null) {
// if it's not recycled, initialize some attributes
btn = new Button(mContext);
btn.setLayoutParams(new GridView.LayoutParams(85, 85));
btn.setPadding(8, 8, 8, 8);
btn.setOnClickListener(new MyOnClickListener(position));
}
else {
btn = (Button) convertView;
}
btn.setText(somestringarray[position]);
// filenames is an array of strings
btn.setTextColor(Color.BLACK);
btn.setBackgroundResource(INTarraywithpictures[position]);
btn.setId(position); //here i set Id
return btn;
}
}
回答by MByD
After calling setContentView, you can use Button b = (Button)findViewById(theButtonId);to get a reference to it.
调用 后setContentView，您可以使用Button b = (Button)findViewById(theButtonId);来获取对它的引用。
回答by Niranj Patel
回答by star angel
if u want to access your button in another class just declare the button as final and static....and if u declare the button as public then u can access the button in another class by creating the object of the class which contains button.
如果你想在另一个类中访问你的按钮，只需将按钮声明为最终和静态......如果你将按钮声明为公共，那么你可以通过创建包含按钮的类的对象来访问另一个类中的按钮。
