android – Gridview及其图像不适合所有屏幕大小

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