[英]why does gradientdrawable.setBackground makes my app crash?
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
GradientDrawable drawable = new GradientDrawable();
drawable.setShape(GradientDrawable.RECTANGLE);
drawable.setStroke(3, Color.GREEN);
View view = inflater.inflate(R.layout.primary, container, false);
LinearLayout layout = (LinearLayout ) view.findViewById(R.layout.primary);
// 1 layout.setBackground(fragmentBorder); <----
// ^ above line causes the crash ^
layout.setBackgroundDrawable(drawable);
return view;
}
Theres no compilation error, it just crashes when I test drive it 没有编译错误,当我测试驱动器时它只会崩溃
LinearLayout layout = (LinearLayout ) view.findViewById(R.layout.primary);
Please change above line as 请更改以上行为
LinearLayout layout = (LinearLayout ) view.findViewById(R.id.primary);
your linear layout remain null that's why it crashing 您的线性布局保持为空,这就是它崩溃的原因
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