正如在我的标题gridview中,图像不适合所有屏幕.

在我的应用程序中,我有15个图像,它是标题,我想在所有屏幕尺寸的3列和5行格式显示它.

但我的Gridview不适合所有屏幕尺寸和图像,标题未正确对齐.

我已经在以下API级别测试了我的应用程序并得到了以下响应.

Reminders.java

public class Reminders extends Fragment {

private OnFragmentInteractionListener mListener;

private View rootView;

public Reminders() {

}

public static Reminders newInstance(String param1, String param2) {

Reminders fragment = new Reminders();

Bundle args = new Bundle();

fragment.setArguments(args);

return fragment;

}

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

}

@Override

public View onCreateView(LayoutInflater inflater,

ViewGroup container,

Bundle savedInstanceState) {

rootView = inflater.inflate(R.layout.fragment_reminders, container, false);

GridView gridView = (GridView) rootView.findViewById(R.id.photogridview);

gridView.setAdapter(new ImageAdapter(rootView.getContext())); // uses the view to get the context instead of getActivity().

return rootView;

}

public void onButtonPressed(Uri uri) {

if (mListener != null) {

mListener.onFragmentInteraction(uri);

}

}

@Override

public void onAttach(Context context) {

super.onAttach(context);

if (context instanceof OnFragmentInteractionListener) {

mListener = (OnFragmentInteractionListener) context;

} else {

throw new RuntimeException(context.toString()

+ " must implement OnFragmentInteractionListener");

}

}

@Override

public void onDetach() {

super.onDetach();

mListener = null;

}

public interface OnFragmentInteractionListener {

void onFragmentInteraction(Uri uri);

}

}

解决方法:

所以,问题在于你如何在这个方法中创建View,并且出现了一些问题：

public View getView(int position, View convertView, ViewGroup parent) {

LinearLayout linearlayout=new LinearLayout(mContext);

ImageView imageView = new ImageView(mContext);

TextView textView =new TextView(mContext);

textView.setGravity(Gravity.CENTER);

linearlayout.setOrientation(LinearLayout.VERTICAL);

imageView.setImageResource(mThumbIds[position]);

imageView.setScaleType(ImageView.ScaleType.CENTER_INSIDE);

imageView.setLayoutParams(new GridView.LayoutParams(230, 230));

textView.setText(mThumbTxt[position]);

linearlayout.addView(imageView);

linearlayout.addView(textView);

return linearlayout;

}

1)现在,你忽略了convertView,所以你在实例化View之前没有检查是否为null,从而浪费了GridViews的回收机制.

2)您将GridView.LayoutParams附加到嵌套在LinearLayout中的子视图. LinearLayout应该有GridView.LayoutParams,但LinearLayout的子节点应该有LinearLayout.LayoutParams.

3)layout_gravity和gravity之间有区别 – 你使用的是引力,对于LinearLayout来说,它不会像你想象的那样工作. (除非在此上下文中,您将TextView更改为match_parent的宽度,但那可能会使其他内容混乱)

我建议放弃动态创建并采用XML通胀方法.

标签：android-gridview,android

来源： https://codeday.me/bug/20190927/1824772.html