我正在尝试制作一个标签，我必须在gridview中显示图像，所以我从其中一个库中制作了普通标签，并制作了一个适配器，以便在我的主要活动代码中显示图像。
class TestAdapter extends FragmentPagerAdapter {
public TestAdapter (FragmentManager manager) {
super(manager);
}
@Override
public Fragment getItem(int i) {
Fragment fragment=null;
if (i==0){
fragment=new One();
}
if (i==1){
fragment=new Two();
}
if (i==2){
fragment=new Three();
}
return fragment;
}
@Override
public int getCount() {
return 3;
}
@Override
public CharSequence getPageTitle(int position) {
String title = new String();
if (position==0){
return "tab1";
}
if (position==1){
return "tab2";
}
if (position==2){
return "tab3";
}
return title;
}
}
我的片段类。
public class One extends Fragment {
public Integer [] imageIDs = {
R.drawable.img1,
R.drawable.img2,
R.drawable.img3,
R.drawable.img4,
R.drawable.img5,
R.drawable.img6,
R.drawable.img7,
R.drawable.img8,
R.drawable.img9,
R.drawable.img10
};
public One() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_one,container,false);
GridView gridView = (GridView) view.findViewById(R.id.gridView);
gridView.setAdapter(new MyAdapter(view.getContext())); // uses the view to get the context instead of getActivity().
return view;
}
@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
}
我已将我的适配器设置为以下
public class MyAdapter extends BaseAdapter {
public Integer [] imageIDs =
{
R.drawable.img1,
R.drawable.img2,
R.drawable.img3,
R.drawable.img4,
R.drawable.img5,
R.drawable.img6,
R.drawable.img7,
R.drawable.img8,
R.drawable.img9,
R.drawable.img10
};
private Context context;
public MyAdapter(Context c){
context=c;
}
@Override
public int getCount() {
return imageIDs.length;
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView;
if (convertView==null){
imageView =new ImageView(context);
imageView.setLayoutParams(new GridView.LayoutParams(85,85));
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setPadding(5,5,5,5);
}
else {
imageView=(ImageView)convertView;
}
imageView.setImageResource(imageIDs[position]);
return imageView;
}
}
我能够在一个活动中创建一个网格视图，但是我用它来声明MainActivity类中的图像，但在这里我收到一个错误。 Sso我在适配器中声明适配器将调用图像。它编译正确，没有任何错误，但它显示运行时错误
04-23 10:39:11.950 571-571/? E/Vold: Error reading configuration (No such file or directory)... continuing anyways
所以如何解决这个问题，我是否必须声明图像。
答案 0 :(得分：0)
如下图所示，在片段中定义图像，然后使用网格视图图像或文本视图对片段进行充气，具体取决于选择的选项卡。
public class CardsFragment extends Fragment {
private static final String ARG_POSITION = "position";
private int position;
GridView servicesGridView;
String[] gridViewString = {
"PROTECTION", "Child Registration", "Repatriation", "rsd", "REFERRAL", "Resettlement",};
int[] gridViewImageId = {
R.drawable.protection, R.drawable.childregistration,
R.drawable.repatriation, R.drawable.rsd,
R.drawable.refferal, R.drawable.resettlement,};
//Create a new instance of a fragment at a specific pisition
public static CardsFragment newInstance(int position) {
CardsFragment f = new CardsFragment();
Bundle b = new Bundle();
b.putInt(ARG_POSITION, position);
f.setArguments(b);
return f;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
position = getArguments().getInt(ARG_POSITION);
}
//Populate the fragment with TextViews and grid view images
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
if (position == 1) {
View rootView = inflater.inflate(R.layout.activity_gv_services, container, false);
// Here we inflate the layout we created above
GridView gridView = (GridView) rootView.findViewById(R.id.gv_services);
gridView.setAdapter(new GV_ServicesAdapter(getActivity().getApplicationContext(),gridViewString, gridViewImageId));
return rootView;
}else {
FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(FrameLayout.LayoutParams.MATCH_PARENT,
FrameLayout.LayoutParams.MATCH_PARENT);
FrameLayout fl = new FrameLayout(getActivity());
fl.setLayoutParams(params);
final int margin = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 8, getResources()
.getDisplayMetrics());
TextView v = new TextView(getActivity());
params.setMargins(margin, margin, margin, margin);
v.setLayoutParams(params);
v.setLayoutParams(params);
v.setGravity(Gravity.CENTER);
v.setBackgroundResource(R.drawable.background_card);
v.setText("CARD " + (position + 1));
fl.addView(v);
return fl;
}
}
}
其中activity_gv_services是承载网格视图的布局文件，gv_services是网格视图本身。如图所示
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<GridView
android:id="@+id/gv_services"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:columnWidth="110dp"
android:gravity="center"
android:numColumns="auto_fit" />
</LinearLayout>
然后你的MyAdapter课程应该是这样的
public class MyAdapter extends BaseAdapter {
private Context mContext;
private final String[] gridViewString;
private final int[] gridViewImageId;
public MyAdapter(Context context, String[] gridViewString, int[] gridViewImageId) {
mContext = context;
this.gridViewImageId = gridViewImageId;
this.gridViewString = gridViewString;
}
@Override
public int getCount() {
return gridViewString.length;
}
@Override
public Object getItem(int i) {
return null;
}
@Override
public long getItemId(int i) {
return 0;
}
@Override
public View getView(int i, View convertView, ViewGroup parent) {
View gridViewAndroid;
LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if (convertView == null) {
gridViewAndroid = new View(mContext);
gridViewAndroid = inflater.inflate(R.layout.gv_services_image_text, null);
TextView textViewAndroid = (TextView) gridViewAndroid.findViewById(R.id.TxtViewservices);
ImageView imageViewAndroid = (ImageView) gridViewAndroid.findViewById(R.id.ImgViewservices);
textViewAndroid.setText(gridViewString[i]);
imageViewAndroid.setImageResource(gridViewImageId[i]);
} else {
gridViewAndroid = (View) convertView;
}
return gridViewAndroid;
}
}
其中gv_services_image_text是包含Imageview和TextView的布局文件，如图所示
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/gv_services_image_text"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center_horizontal"
android:orientation="vertical">
<ImageView
android:id="@+id/ImgViewservices"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_marginTop="15dp" />
<TextView
android:id="@+id/TxtViewservices"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:textSize="12sp" />
</LinearLayout>