每当我试图在自定义回收器视图中以网格布局加载数据时,视图会突然消失,但有时它会完美地加载数据。我在滑动刷新布局下的嵌套滚动视图下使用了回收器视图。
我已经尝试了这个链接“添加时RecycerView addInArray error”上给出的所有内容,但没有任何帮助。
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.near_me_list_layout);
recyclerView.setHasFixedSize(true);
RecyclerView.LayoutManager mLayoutManager = new GridLayoutManager(NearMeListActivity.this, 2);
recyclerView.setLayoutManager(mLayoutManager);
//recyclerView.setAdapter(gridAdapter);
NearMeListActivity.requestSingleUpdate(this, new NearMeListActivity.LocationCallback() {
@Override
public void onNewLocationAvailable(GPSCoordinates location) {
if (location != null) {
latitude = location.latitude;
longitude = location.longitude;
Log.d("Location", "my location is " + location.toString());
System.out.println("lat:" + latitude + ".....lng:" + longitude);
fetchItems(latitude, longitude);
}
}
});
swipeRefreshLayout.setColorSchemeResources(R.color.orange, R.color.green, R.color.darkBlue);
swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
@Override
public void onRefresh() {
//fetchingData.setVisibility(View.INVISIBLE);
checkLocationEnable();
id.clear();
placeName.clear();
category.clear();
lat.clear();
lng.clear();
NearMeListActivity.requestSingleUpdate(NearMeListActivity.this, new NearMeListActivity.LocationCallback() {
@Override
public void onNewLocationAvailable(GPSCoordinates location) {
if (location != null) {
latitude = location.latitude;
longitude = location.longitude;
System.out.println("lat:" + latitude + ".....lng:" + longitude);
loadCategories();
fetchItems(latitude, longitude);
} else {
swipeRefreshLayout.setRefreshing(false);
}
}
});
}
});
}
private void fetchItems(double latitude, double longitude) {
if (ConnectivityUtils.isConnectedMobile(this) || ConnectivityUtils.isConnectedWifi(this)) {
AsyncHttpClient client = new AsyncHttpClient();
String near_me = PropertyReader.getProperty("near_me", this) + "lat=" + latitude + "&long=" + longitude;
client.get(near_me, new JsonHttpResponseHandler() {
@Override
public void onSuccess(int statusCode, Header[] headers, JSONObject response) {
try {
if (!response.getString("data").equals("null")) {
noData.setVisibility(View.INVISIBLE);
JSONArray getData = response.getJSONArray("data");
for (int i = 0; i < getData.length(); i++) {
JSONObject data = getData.getJSONObject(i);
id.add(data.getInt("id"));
placeName.add(data.getString("place_name"));
category.add(data.getString("category"));
lat.add(data.getString("latitude"));
lng.add(data.getString("longitude"));
}
gridAdapter = new GridAdapter(NearMeListActivity.this, id, placeName, category, lat, lng);
recyclerView.setAdapter(gridAdapter); // set the Adapter to RecyclerView
gridAdapter.notifyDataSetChanged();
int resId = R.anim.layout_animation_fall_down;
LayoutAnimationController animation = AnimationUtils.loadLayoutAnimation(NearMeListActivity.this, resId);
recyclerView.setLayoutAnimation(animation);
fetchingData.setVisibility(View.INVISIBLE);
} else {
noData.setVisibility(View.VISIBLE);
fetchingData.setVisibility(View.INVISIBLE);
}
} catch (Exception e) {
e.printStackTrace();
}
}
@Override
public void onFinish() {
swipeRefreshLayout.setRefreshing(false);
}
@Override
public void onFailure(int statusCode, Header[] headers, Throwable throwable, JSONObject errorResponse) {
Toast.makeText(NearMeListActivity.this, R.string.isOnline, Toast.LENGTH_SHORT).show();
swipeRefreshLayout.setRefreshing(false);
fetchingData.setVisibility(View.INVISIBLE);
}
});
} else {
Toast.makeText(NearMeListActivity.this, R.string.isOnline, Toast.LENGTH_SHORT).show();
swipeRefreshLayout.setRefreshing(false);
fetchingData.setVisibility(View.INVISIBLE);
}
}
class GridAdapter extends RecyclerView.Adapter<GridAdapter.MyViewHolder> {
final private Context context;
final private ArrayList<Integer> id;
final private ArrayList<String> nameOfPlace, category;
final private ArrayList<String> longitudes;
final private ArrayList<String> latitudes;
GridAdapter(Context context, ArrayList<Integer> id, ArrayList<String> nameOfPlace, ArrayList<String> category, ArrayList<String> latitudes, ArrayList<String> longitudes) {
this.context = context;
this.id = id;
this.nameOfPlace = nameOfPlace;
this.category = category;
this.latitudes = latitudes;
this.longitudes = longitudes;
}
@NonNull
@Override
public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
// inflate the item Layout
View view;
view = LayoutInflater.from(parent.getContext()).inflate(R.layout.grid_list_layout, parent, false);
return new MyViewHolder(view);
}
@Override
public void onBindViewHolder(@NonNull GridAdapter.MyViewHolder myViewHolder, int position) {
Glide.with(context).load(PropertyReader.getProperty("get_img", context) + "location_id=" + id.get(position)).into(myViewHolder.thumbnail);
myViewHolder.nameOfPlace.setText(nameOfPlace.get(position));
myViewHolder.category.setText(category.get(position));
final String destLat = latitudes.get(position);
final String destLng = longitudes.get(position);
myViewHolder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String uri = "http://maps.google.com/maps?daddr=" + destLat + "," + destLng;
Intent mapIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(uri));
mapIntent.setPackage("com.google.android.apps.maps");
context.startActivity(mapIntent);
}
});
}
@Override
public int getItemCount() {
return id.size();
}
class MyViewHolder extends RecyclerView.ViewHolder {
ImageView thumbnail;
TextView nameOfPlace, category;
MyViewHolder(View view) {
super(view);
thumbnail = view.findViewById(R.id.thumbnail);
nameOfPlace = view.findViewById(R.id.nameOfPlace);
category = view.findViewById(R.id.category);
}
}
}
<android.support.v4.widget.SwipeRefreshLayout
android:id="@+id/swipeRefresh"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintBottom_toTopOf="@id/spinner"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@id/toolbar">
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.RecyclerView
android:id="@+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clipToPadding="false"
android:scrollbars="vertical"
android:orientation="vertical"/>
</android.support.v4.widget.NestedScrollView>
</android.support.v4.widget.SwipeRefreshLayout>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<android.support.v7.widget.CardView
android:id="@+id/cardLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:layout_margin="4dp"
android:elevation="8dp"
android:focusable="true"
android:foreground="?attr/selectableItemBackground"
card_view:cardCornerRadius="4dp">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="@+id/thumbnail"
android:layout_width="match_parent"
android:layout_height="150dp"
android:background="?attr/selectableItemBackgroundBorderless"
android:contentDescription="@string/image_of_place"
android:focusable="true"
android:scaleType="fitXY" />
<TextView
android:id="@+id/nameOfPlace"
style="@style/TextAppearance.AppCompat.Subhead"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/thumbnail"
android:layout_marginStart="4dp"
android:layout_marginTop="2dp"
android:hint="@string/name_of_place1"
android:maxLines="2"
android:textSize="14sp" />
<TextView
android:id="@+id/category"
style="@style/TextAppearance.AppCompat.Caption"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/nameOfPlace"
android:layout_marginStart="4dp"
android:hint="@string/category"
android:textSize="12sp" />
<RatingBar
style="?android:attr/ratingBarStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/category"
android:layout_marginStart="4dp"
android:layout_marginBottom="4dp"
android:layout_marginTop="4dp"
android:numStars="5"
android:rating="2.0"
android:stepSize="1.0" />
</RelativeLayout>
</android.support.v7.widget.CardView>
</LinearLayout>
D/ViewGroup: addInArray been called, this = android.support.v7.widget.RecyclerView{42adb848 VFED.V.. ......ID 0,0-540,0 #7f0a00f4 app:id/recycler_view}call stack =
java.lang.Throwable: addInArray
at android.view.ViewGroup.addInArray(ViewGroup.java:3786)
at android.view.ViewGroup.addViewInner(ViewGroup.java:3740)
at android.view.ViewGroup.addView(ViewGroup.java:3564)
at android.view.ViewGroup.addView(ViewGroup.java:3509)
at android.support.v7.widget.RecyclerView$5.addView(RecyclerView.java:851)
at android.support.v7.widget.ChildHelper.addView(ChildHelper.java:107)
at android.support.v7.widget.RecyclerView$LayoutManager.addViewInt(RecyclerView.java:8336)
at android.support.v7.widget.RecyclerView$LayoutManager.addView(RecyclerView.java:8294)
at android.support.v7.widget.RecyclerView$LayoutManager.addView(RecyclerView.java:8282)
at android.support.v7.widget.GridLayoutManager.layoutChunk(GridLayoutManager.java:580)
at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1517)
at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:612)
at android.support.v7.widget.GridLayoutManager.onLayoutChildren(GridLayoutManager.java:171)
at android.support.v7.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:3924)
at android.support.v7.widget.RecyclerView.onMeasure(RecyclerView.java:3336)
at android.view.View.measure(View.java:16834)
at android.support.v4.widget.NestedScrollView.measureChildWithMargins(NestedScrollView.java:1502)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:340)
at android.support.v4.widget.NestedScrollView.onMeasure(NestedScrollView.java:556)
at android.view.View.measure(View.java:16834)
at android.support.v4.widget.SwipeRefreshLayout.onMeasure(SwipeRefreshLayout.java:641)
at android.view.View.measure(View.java:16834)
at android.support.constraint.ConstraintLayout$Measurer.deprecatedMeasure(ConstraintLayout.java:865)
at android.support.constraint.solver.widgets.analyzer.BasicMeasure.simpleSolverMeasure(BasicMeasure.java:232)
at android.support.constraint.solver.widgets.ConstraintWidgetContainer.measure(ConstraintWidgetContainer.java:102)
at android.support.constraint.ConstraintLayout.resolveSystem(ConstraintLayout.java:1556)
at android.support.constraint.ConstraintLayout.onMeasure(ConstraintLayout.java:1588)
at android.view.View.measure(View.java:16834)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5374)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:340)
at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:143)
at android.view.View.measure(View.java:16834)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5374)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1621)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:742)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:607)
at android.view.View.measure(View.java:16834)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5374)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:340)
at android.view.View.measure(View.java:16834)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5374)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1621)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:742)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:607)
at android.view.View.measure(View.java:16834)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5374)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:340)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2368)
at android.view.View.measure(View.java:16834)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2246)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1312)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1509)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1189)
D/ViewGroup: removeFromArray been called, this = android.support.v7.widget.RecyclerView{42adb848 VFED.V.. ......ID 0,0-540,2449 #7f0a00f4 app:id/recycler_view}call stack =
java.lang.Throwable: removeFromArray
at android.view.ViewGroup.removeFromArray(ViewGroup.java:3833)
at android.view.ViewGroup.detachViewFromParent(ViewGroup.java:4401)
at android.support.v7.widget.RecyclerView.access$100(RecyclerView.java:207)
at android.support.v7.widget.RecyclerView$5.detachViewFromParent(RecyclerView.java:941)
at android.support.v7.widget.ChildHelper.detachViewFromParent(ChildHelper.java:284)
at android.support.v7.widget.RecyclerView$LayoutManager.detachViewInternal(RecyclerView.java:8526)
at android.support.v7.widget.RecyclerView$LayoutManager.detachViewAt(RecyclerView.java:8519)
at android.support.v7.widget.RecyclerView$LayoutManager.scrapOrRecycleView(RecyclerView.java:8947)
at android.support.v7.widget.RecyclerView$LayoutManager.detachAndScrapAttachedViews(RecyclerView.java:8930)
at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:580)
at android.support.v7.widget.GridLayoutManager.onLayoutChildren(GridLayoutManager.java:171)
at android.support.v7.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:3924)
at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:3647)
at android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:4194)
at android.view.View.layout(View.java:15125)
at android.view.ViewGroup.layout(ViewGroup.java:4862)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:515)
at android.widget.FrameLayout.onLayout(FrameLayout.java:450)
at android.support.v4.widget.NestedScrollView.onLayout(NestedScrollView.java:1733)
at android.view.View.layout(View.java:15125)
at android.view.ViewGroup.layout(ViewGroup.java:4862)
at android.support.v4.widget.SwipeRefreshLayout.onLayout(SwipeRefreshLayout.java:625)
at android.view.View.layout(View.java:15125)
at android.view.ViewGroup.layout(ViewGroup.java:4862)
at android.support.constraint.ConstraintLayout.onLayout(ConstraintLayout.java:1762)
at android.view.View.layout(View.java:15125)
at android.view.ViewGroup.layout(ViewGroup.java:4862)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:515)
at android.widget.FrameLayout.onLayout(FrameLayout.java:450)
at android.view.View.layout(View.java:15125)
at android.view.ViewGroup.layout(ViewGroup.java:4862)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1888)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1742)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1651)
at android.view.View.layout(View.java:15125)
at android.view.ViewGroup.layout(ViewGroup.java:4862)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:515)
at android.widget.FrameLayout.onLayout(FrameLayout.java:450)
at android.view.View.layout(View.java:15125)
at android.view.ViewGroup.layout(ViewGroup.java:4862)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1888)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1742)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1651)
at android.view.View.layout(View.java:15125)
at android.view.ViewGroup.layout(ViewGroup.java:4862)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:515)
at android.widget.FrameLayout.onLayout(FrameLayout.java:450)
at android.view.View.layout(View.java:15125)
at android.view.ViewGroup.layout(ViewGroup.java:4862)
at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2317)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2023)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1189)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6223)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:788)
at android.view.Choreographer.doCallbacks(Choreographer.java:591)
at android.view.Choreographer.doFrame(Choreographer.java:560)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Ch
我希望在我给定的布局条件下完美地加载数据。
gridAdapter = new GridAdapter(NearMeListActivity.this, id, placeName, category, lat, lng);
recyclerView.setAdapter(gridAdapter);
// set the Adapter to RecyclerView
gridAdapter.notifyDataSetChanged();
移除
gridAdapter.notifyDataSetChanged();
未处理 异常: java.io.FileNotFoundException 测试过文件存在,但放在Scanner里面报错。有佬能帮忙分析下吗
如何使用实现以下功能? 这是完全不一样的,我实际上如何解决?
线程“main”java.lang.ArithmeticException中出现异常:/by zero at run.prg34.main(prg34.java:8) 如何在java中解决上述算法异常?
我正在开发一个Android应用程序,使用ExoPlayer用于视频播放,Glide用于图像显示,以及用于文件下载的下载库,并且它们都具有与HttpURLConnection相关的NullPointerExctive,我确信使用的链接是可用的。 神奇的是,我只是按照这些库的官方留档中描述的方法正常加载数据,这种错误时有发生,三个库可能不会同时抛出NullPointerExctive,我甚至不知道如
我正在尝试将50000条记录插入到一个五节点的卡桑德拉集群中。我正在使用执行异步以提高性能(减少应用程序端的插入时间)。我尝试了具有多个批处理大小的批处理语句,但每次我都遇到以下异常。 我插入了数据,即10000,20000到40000条记录,没有任何问题。以下是我编写的java代码。 其中ps是准备好的语句,batches是批数,batchSize是批中的记录数。 我无法理解这个问题的根本原因。