您好，在下面将所有图像显示为gridview.gridview图像正确显示。默认网格视图将提供滚动选项，现在滚动图像，它不能顺利滚动。
任何人都可以帮助我。如何平滑滚动所有图像，如正常滚动。这是我的下面的代码，任何我错误的地方，请帮助我
的java
public class GridFragment2 extends Fragment {
private static final String TAG = GridFragment.class.getSimpleName();
public static boolean isSelectedGrid2;
private GridView mGridView;
private ProgressBar mProgressBar;
private GridViewAdapter2 mGridAdapter;
private ArrayList<GridItem> mGridData;
private String FEED_URL = "http://javatechig.com/?json=get_recent_posts&count=45", searchKey;
String vv;
LinearLayout top;
View hr;
String catid;
SharedPreferences imgSh;
SharedPreferences p, got;
public GridFragment2() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.activity_gridview2, container, false);
mGridView = (GridView)rootView.findViewById(R.id.gridView);
mProgressBar = (ProgressBar)rootView.findViewById(R.id.progressBar);
top = (LinearLayout)rootView.findViewById(R.id.top);
hr = rootView.findViewById(R.id.hr);
top.setVisibility(View.GONE);
hr.setVisibility(View.GONE);
imgSh = this.getActivity().getSharedPreferences("data", Context.MODE_APPEND);
p = this.getActivity().getSharedPreferences("gridData", Context.MODE_APPEND);
got = this.getActivity().getSharedPreferences("gotData", Context.MODE_APPEND);
//Initialize with empty data
mGridData = new ArrayList<>();
mGridAdapter = new GridViewAdapter2(rootView.getContext(), R.layout.grid_item_layout2, mGridData);
mGridView.setAdapter(mGridAdapter);
//Grid view click event
mGridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
//Get item at position
isSelectedGrid2=true;
String catalogueID = p.getString("SelectedCatalogueIdFromGrid1", "");
GridItem item = (GridItem) parent.getItemAtPosition(position);
Intent intent = new Intent(getActivity(), ImageGallery.class);
ImageView imageView = (ImageView) v.findViewById(R.id.grid_item_image);
int[] screenLocation = new int[2];
imageView.getLocationOnScreen(screenLocation);
SharedPreferences prefPosition=getActivity().getSharedPreferences("positionPref", Context.MODE_PRIVATE);
SharedPreferences.Editor positionEditor=prefPosition.edit();
positionEditor.putInt("position", position);
positionEditor.commit();
//Pass the image title and url to DetailsActivity
intent.putExtra("left", screenLocation[0]).
putExtra("top", screenLocation[1]).
putExtra("width", imageView.getWidth()).
putExtra("height", imageView.getHeight()).
putExtra("title", item.getTitle()).
putExtra("image", item.getImage()).
putExtra("catid", catalogueID).putExtra("position",position);
// Log.d("image", (item.getImage()).toString());
//Start details activity
getActivity().finish();
startActivity(intent);
}
});
//Start download
new AsyncHttpTask().execute(FEED_URL);
mProgressBar.setVisibility(View.VISIBLE);
return rootView;
}
//Downloading data asynchronously
public class AsyncHttpTask extends AsyncTask<String, Void, Integer> {
@Override
protected Integer doInBackground(String... params) {
Integer result = 1;
parseResult();
return result;
}
@Override
protected void onPostExecute(Integer result) {
// Download complete. Lets update UI
if (result == 1) {
mGridAdapter.setGridData(mGridData);
} else {
Toast.makeText(getActivity().getBaseContext(), "Failed to fetch data!", Toast.LENGTH_SHORT).show();
}
//Hide progressbar
mProgressBar.setVisibility(View.GONE);
}
}
String streamToString(InputStream stream) throws IOException {
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(stream));
String line;
String result = "";
while ((line = bufferedReader.readLine()) != null) {
result += line;
}
// Close stream
if (null != stream) {
stream.close();
}
return result;
}
private void parseResult() {
catid = p.getString("SelectedCatalogueIdFromGrid1", "");
int clickedPosn = p.getInt("clickedPosition", 0);
int count = p.getInt("numOfImagesInside"+catid+clickedPosn, 0);
Log.d("counterman-id", String.valueOf(count));
GridItem item;
for (int i = 0; i < count; i++) {
item = new GridItem();
item.setTitle("");
// item.setImage("file://" + Environment.getExternalStorageDirectory() + "/" + "thumbImage" + catid + i + ".jpg");
item.setImage("/data/data/com.example.adaptiz.tanishq/"+"thumbImage" + catid + i+".jpg");
// item.setImage(imgSh.getString("thumb" + i, ""));
mGridData.add(item);
}
}
适配器
public class GridViewAdapter2 extends ArrayAdapter<GridItem> {
//private final ColorMatrixColorFilter grayscaleFilter;
private Context mContext;
private int layoutResourceId;
private ArrayList<GridItem> mGridData = new ArrayList<GridItem>();
public GridViewAdapter2(Context mContext, int layoutResourceId, ArrayList<GridItem> mGridData) {
super(mContext, layoutResourceId, mGridData);
this.layoutResourceId = layoutResourceId;
this.mContext = mContext;
this.mGridData = mGridData;
}
/**
* Updates grid data and refresh grid items.
*
* @param mGridData
*/
public void setGridData(ArrayList<GridItem> mGridData) {
this.mGridData = mGridData;
notifyDataSetChanged();
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
ViewHolder holder;
if (row == null) {
LayoutInflater inflater = ((Activity) mContext).getLayoutInflater();
row = inflater.inflate(layoutResourceId, parent, false);
Typeface type_normal = Typeface.createFromAsset(getContext().getAssets(), "HelveticaNeue-Light.otf");
holder = new ViewHolder();
holder.titleTextView = (TextView) row.findViewById(R.id.grid_item_title);
holder.titleTextView.setTypeface(type_normal);
holder.download=(ImageView)row.findViewById(R.id.img);
holder.imageView = (ImageView) row.findViewById(R.id.grid_item_image);
row.setTag(holder);
} else {
holder = (ViewHolder) row.getTag();
}
GridItem item = mGridData.get(position);
holder.titleTextView.setText(Html.fromHtml(item.getTitle()));
File image = new File(item.getImage(), "");
BitmapFactory.Options options = new BitmapFactory.Options();
options.inTempStorage = new byte[16*1024];
options.inPurgeable = true;
Bitmap bitmap = BitmapFactory.decodeFile(image.getAbsolutePath(), options);
// bitmap = Bitmap.createScaledBitmap(bitmap, 230, 230, true);
Log.d("the bitmap size", String.valueOf(bitmap.getWidth() + " " + bitmap.getHeight()));
holder.imageView.setImageBitmap(bitmap);
//bitmap=null;
// Picasso.with(mContext).load(item.getImage()).into(holder.imageView);
return row;
}
static class ViewHolder {
TextView titleTextView;
ImageView imageView;
ImageView download;
}
XML
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/toprel"
>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="30dp"
android:id="@+id/top"
android:orientation="horizontal"
android:layout_alignParentTop="true"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="30dp"
android:id="@+id/searchTitle"
android:layout_centerVertical="true"
android:text="Search"
android:textSize="15sp"
android:gravity="left"
android:layout_toRightOf="@+id/leftTitle"
android:layout_toEndOf="@+id/leftTitle" />
<EditText
android:inputType="text"
android:layout_centerVertical="true"
android:layout_width="200dp"
android:layout_height="30dp"
android:id="@+id/searchBox"
android:background="@drawable/searchbg2x"
android:layout_toRightOf="@+id/searchTitle"
android:layout_toEndOf="@+id/searchTitle"
android:layout_marginLeft="15dp"
android:singleLine="true"
android:imeOptions="actionSearch"
/>
</LinearLayout>
<View
android:layout_marginTop="5dp"
android:layout_width="match_parent"
android:layout_height="1dp"
android:id="@+id/hr"
android:background="#000000"
android:layout_below="@id/top"
/>
<GridView
android:layout_below="@+id/hr"
android:id="@+id/gridView"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_margin="5dp"
android:columnWidth="200dp"
android:gravity="center"
android:numColumns="4"
android:stretchMode="columnWidth"
android:verticalSpacing="5dp"
android:listSelector="@android:color/transparent"
android:clickable="true"
android:fastScrollEnabled="true"/>
<ProgressBar
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/progressBar"
android:layout_centerInParent="true"
android:visibility="gone"/>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="20dp"
android:orientation="horizontal"
android:id="@+id/userlayout"
android:layout_alignParentTop="true"
android:visibility="gone"
android:layout_alignRight="@+id/gridView"
android:layout_alignEnd="@+id/gridView"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:textSize="18sp"
android:id="@+id/userView"
android:text="username"
/>
<ImageView
android:layout_marginLeft="8dp"
android:layout_marginTop="8dp"
android:layout_width="20dp"
android:layout_height="10dp"
android:background="@drawable/icon"
/>
</LinearLayout>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:textSize="15sp"
android:layout_gravity="bottom"
android:layout_alignBottom="@+id/gridView"
android:layout_centerHorizontal="true" />
</RelativeLayout>
答案 0 :(得分：0)
为此你必须使用Image Loader来加载图像。
请参阅以下链接。
http://www.androidhive.info/2012/07/android-loading-image-from-url-http/