你可以向我解释为什么我在刷新我的内容时会出现"致命异常:java.lang.UnsupportedOperationException"吗?在正常情况下,该功能应下载数据并为每一行创建一个回收器/卡...
public void onRefresh() {
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
mSwipeRefreshLayout.setRefreshing(false);
}
}, 2500);
new Thread(new Runnable(){
public void run(){
if(!isNetworkAvailable()){
Toast.makeText(getApplicationContext(), getResources().getString(R.string.nointernet), Toast.LENGTH_LONG).show();
return;
}
String str=getOnline("http://ni141767_1.vweb12.nitrado.net/vp.php");
String lines[] = str.split("\\<.*?\\>");
for (int i = 0; i < lines.length; i++) {
String content[] = lines[i].split("_");
String fach = content[5];
String lehrer = content[6];
Data dataToAdd = new Data(fach,lehrer);
mData.add(dataToAdd);
mAdapter.addItem(i, dataToAdd);
content = null;
}
}
}).start();
}
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Data.java:
public class Data {
public String …Run Code Online (Sandbox Code Playgroud) 我的工作RecyclerView onItemClick和onItemLongClick,工作都不错,但问题是onItemLongClick还要求onItemClick.
这是我的适配器代码:
package Adaptor;
import android.annotation.SuppressLint;
import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import com.wings.example.recycleview.MainActivity;
import com.wings.example.recycleview.R;
import java.util.ArrayList;
public class SampleAdapter extends RecyclerView.Adapter<SampleAdapter.ViewHolder> {
Context context;
private ArrayList<String> arrayList;
private static onClickListner onclicklistner;
public SampleAdapter(Context context) {
this.context = context;
arrayList = MainActivity.arrayList;
}
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener, View.OnLongClickListener {
TextView txt_pos;
SampleAdapter sampleAdapter;
public ViewHolder(View itemView, SampleAdapter sampleAdapter) {
super(itemView);
itemView.setOnClickListener(this); …Run Code Online (Sandbox Code Playgroud) 我想创建一个这样的简单视图.(红圈)
我在互联网上搜索了Recyclerview中的Bundling但我找不到任何资源.
任何人都可以告诉我这个视图的名称或分享任何教程资源.
有人可以分享如何做到这一点的例子.或任何关于如何获得此视图的教程. - 赏金问题
当用户按下 #button 时,它会如何在 RecyclerView 的焦点 EditText 上打印 #。我的代码和输出如下。请帮我....
我已经做了一切,但被困在这里。我可以得到任何建议或链接,提供有关如何实施的更多信息吗?
活动_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<Button
android:id="@+id/btnAt"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="\@" />
<Button
android:id="@+id/btnHash"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="\#" />
</LinearLayout>
<android.support.v7.widget.RecyclerView
android:id="@+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
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主活动.java
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private RecyclerView mRecyclerView; // RecyclerVIew
private CheckItemAdapter myAdapterRecyclerView; //The Adapter for RecyclerVIew
Button btnAt, btnHash;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mRecyclerView = (RecyclerView) findViewById(R.id.recyclerView);
setAdapter();
btnAt = …Run Code Online (Sandbox Code Playgroud) 我在RecyclerAdapter的onBindViewHolder中有一个视图项.由于不推荐使用setBackgroundColor,我该怎么做呢?
holder.itemView.setBackgroundColor(mContext.getResources().getColor(bgColor));
Run Code Online (Sandbox Code Playgroud) 我正在使用 recyclerview 并突然收到一个奇怪的错误。我已经尝试了我能做的一切。甚至放置断点。但它没有到达任何地方。数组列表中有数据。我已经尝试了 StackOverFlow 上可用的所有解决方案。它仍然不起作用,并且可用的解决方案也适用于 ListView。我正在使用 recycerview,所以我无法获得解决方案。没有空值。我的回收器适配器如下:
private class RecyclerAdapter extends RecyclerView.Adapter<RecyclerViewHolders> {
private Context context;
private ArrayList<Integer> arrayTarget = new ArrayList<>();
private ArrayList<Integer> arrayAchievements = new ArrayList<>();
private ArrayList<String> arrayAssociateName = new ArrayList<>();
private ArrayList<String> arrayUserType = new ArrayList<>();
private ArrayList<Integer> arrayAchievedGrp = new ArrayList<>();
public RecyclerAdapter(Context c, ArrayList<Integer> arrayTarget,
ArrayList<String> arrayAssociateName, ArrayList<Integer> arrayAchievements,
ArrayList<String> arrayUserType, ArrayList<Integer> arrayAchievedGrp) {
this.context = c;
this.arrayTarget = arrayTarget;
this.arrayAchievements = arrayAchievements;
this.arrayAssociateName = arrayAssociateName;
this.arrayUserType = arrayUserType;
this.arrayAchievedGrp = arrayAchievedGrp;
}
@Override …Run Code Online (Sandbox Code Playgroud) So I have a standard RecyclerView that takes a list of posts and displays them to the user. My problem is when the user comes into the activity, I want to be able to change the focus to a particular post.
Ex. User A sees that he has a notification that of someone has liked his/her post. He/she clicks that notification, and it loads the activity of user's post, and then the focus changes to the position of the post …
我如何获得“RecyclerView”当前可见项目。已经尝试了 recyclerview 的不同方法,但我无法得到解决方案,所以请帮助和指导我
我正在尝试使用每个MapView内部实现包含CardViews的RecyclerView.问题是,在自定义适配器中初始化的MapView不会加载,除非您单击它.正如这里已经提到的:Android MapView不会加载,除非您触摸mapview, 您可以通过覆盖onResume()来解决问题.我试过以下方式:
@Override
public void onResume() {
if(LocationsAdapter.ViewHolder.mapView != null) {
LocationsAdapter.ViewHolder.mapView.onResume();
}
super.onResume();
}
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老实说,我根本不知道如何以任何其他方式覆盖onResume,如果我在这里打破了某些编程规则,请原谅我.我将mapView作为在LocationsAdapter中创建的ViewHolder中的公共静态.这似乎不起作用,地图仍然是空白.
Adapter内的ViewHolder实现了OnMapReadyCallback.
public static class ViewHolder extends RecyclerView.ViewHolder implements OnMapReadyCallback
...
@Override
public void onMapReady(GoogleMap googleMap) {
this.googleMap = googleMap;
Location location = locations.get(getAdapterPosition());
this.googleMap.addMarker(new MarkerOptions().position(location.getLatlng()).title(location.getName()));
this.googleMap.moveCamera(CameraUpdateFactory.newLatLng(location.getLatlng()));
this.googleMap.animateCamera(CameraUpdateFactory.newLatLngZoom(location.getLatlng(), 7.0f));
}
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调用ViewHolder时会调用这两个方法.
mapView.onCreate(null);
mapView.getMapAsync(this);
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另一篇提到这个问题的文章还没有答案:cardview里面的mapView没有加载地图.
我的目标是,无论片段当前处于什么生命周期,都要加载映射.我假设您不需要适配器,片段和XML来解决此问题.如果你这样做,请告诉我.
android android-mapview google-maps-android-api-2 android-recyclerview
为什么有时负数返回 RecyclerView 中的位置?
获取位置:
holder.getAdapterPosition()
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