【发布时间】：2017-04-16 03:49:12
【问题描述】：
我从数据库中获取 3 个String 值，然后将其转换为Long，然后计算差异，然后将计算出的Long 值作为参数放入方法中。我正在使用FastAdapter。
filterRequests(List <Long> l) 是MainActivity 中的一个方法，它根据长l 执行过滤请求/内容的逻辑。
整个适配器：
public class GRModelClass extends AbstractItem<GRModelClass, GRClass.ViewHolder>{
private static final ViewHolderFactory<? extends ViewHolder> FACTORY = new ItemFactory();
String postedBy, postedTime, currentLat, currentLng, utcFormatDateTime, userEmail, userID;
String startDateTimeInEpoch, endDateTimeInEpoch;
DatabaseReference primaryDBKey;
long ms;
String itemID;
public GRModelClass(){}
public GRModelClass(String postedBy, String postedTime, String currentLat, String currentLng, String utcFormatDateTime, String userEmail, String userID, String startDateTimeInEpoch, String endDateTimeInEpoch, DatabaseReference primaryDBKey) {
this.postedBy = " " + postedBy;
this.postedTime = postedTime;
this.currentLat = currentLat;
this.currentLng = currentLng;
this.utcFormatDateTime = utcFormatDateTime;
this.userEmail = userEmail;
this.userID = userID;
this.startDateTimeInEpoch = startDateTimeInEpoch;
this.endDateTimeInEpoch = endDateTimeInEpoch;
this.primaryDBKey = primaryDBKey;
}
@Exclude
public Map<String, Object> toMap() {
HashMap<String, Object> result = new HashMap<>();
result.put("pBy", postedBy);
result.put("cLat", currentLat);
result.put("cLng", currentLng);
result.put("utcFormatDateTime", utcFormatDateTime);
result.put("userEmail", userEmail);
result.put("userID", userID);
result.put("startDateTime", startDateTimeInEpoch);
result.put("endDateTime", endDateTimeInEpoch);
return result;
}
@Override
public int getType() {
return R.id.recycler_view;
}
@Override
public int getLayoutRes() {
return R.layout.sr_layout;
}
@Override
public void bindView(final ViewHolder holder, List list) {
super.bindView(holder, list);
holder.postedBy.setText(postedBy);
holder.postedBy.setTypeface(null, Typeface.BOLD);
holder.startDateTimeInEpoch.setText(startDateTimeInEpoch);
holder.startDateTimeInEpoch.setVisibility(View.INVISIBLE);
holder.endDateTimeInEpoch.setText(endDateTimeInEpoch);
holder.endDateTimeInEpoch.setVisibility(View.INVISIBLE);
MainActivity.filterButton.setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
@Override
public boolean onMenuItemClick(MenuItem menuItem) {
holder.geoQuery = holder.geoFireReference.queryAtLocation(new GeoLocation(holder.currentLatDouble, holder.currentLngDouble), 5);
holder.geoQuery.addGeoQueryEventListener(new GeoQueryEventListener() {
@Override
public void onKeyEntered(String key, GeoLocation location) {
primaryDBKey.child(key).child("startDateTimeInEpoch").addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
if (dataSnapshot.getValue() != null) {
holder.startTimeDateInEpochLong2 = Long.parseLong(dataSnapshot.getValue().toString());
holder.now = System.currentTimeMillis() / 1000;
holder.diffNowsdtel.add(holder.startTimeDateInEpochLong2 - holder.now);
Log.d("log1", String.valueOf(holder.diffNowsdtel));
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
if(holder.mContext instanceof MainActivity){
((MainActivity)holder.mContext).filterRequests(holder.diffNowsdtel);
Log.d("log2", String.valueOf(holder.diffNowsdtel));
}
}
}, 1500);
}
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
@Override
public void onKeyExited(String key) {
}
@Override
public void onKeyMoved(String key, GeoLocation location) {
}
@Override
public void onGeoQueryReady() {
}
@Override
public void onGeoQueryError(DatabaseError error) {
}
});
return true;
}
});
}
/**
* our ItemFactory implementation which creates the ViewHolder for our adapter.
* It is highly recommended to implement a ViewHolderFactory as it is 0-1ms faster for ViewHolder creation,
* and it is also many many timesa more efficient if you define custom listeners on views within your item.
*/
protected static class ItemFactory implements ViewHolderFactory<ViewHolder> {
public ViewHolder create(View v) {
return new ViewHolder(v);
}
}
/**
* return our ViewHolderFactory implementation here
*
* @return
*/
@Override
public ViewHolderFactory<? extends ViewHolder> getFactory() {
return FACTORY;
}
// Manually create the ViewHolder class
protected static class ViewHolder extends RecyclerView.ViewHolder {
TextView postedBy, userID, currentLt, currentLn, requestID, postedFrom;
TextView startDateTimeInEpoch, endDateTimeInEpoch, diffNowsdtelTV;
LinearLayout linearLayout;
long difference, differenceCurrentStartTime, handlerGap;
long startTimeDateInEpochLong2;
public static long now;
List<Long> diffNowsdtel;
Context mContext;
DatabaseReference firebaseDatabase;
GeoFire geoFireReference;
GeoQuery geoQuery;
public ViewHolder(final View itemView) {
super(itemView);
postedBy = (TextView) itemView.findViewById(R.id.postedBy);
startDateTimeInEpoch = (TextView) itemView.findViewById(R.id.startTimeDateInEpoch);
endDateTimeInEpoch = (TextView) itemView.findViewById(R.id.endTimeDateInEpoch);
diffNowsdtelTV = (TextView) itemView.findViewById(R.id.diffNowsdtelTV);
this.mContext = itemView.getContext();
private boolean isNetworkAvailable() {
ConnectivityManager connectivityManager
= (ConnectivityManager) itemView.getContext().getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
return activeNetworkInfo != null && activeNetworkInfo.isConnected();
}
}
}
问题是，当我记录 log1 时，我得到了 Logcat 中显示的所有 3 个值，但是当我记录 log2 时，只计算了最后一个值值正在显示，这就是调用 filterRequests(Long l) 时使用的值。
更新 - 更新适配器代码后，log1 和 log2 现在显示如下：
D/log1: [2197]
D/log1: [2197, -1007]
D/log1: [2197, -1007, 4003]
D/log2: [2197, -1007, 4003]
filterRequests() 方法是完成基于时间过滤内容的逻辑的方法。 filterRequests() 中的参数是 holder.diffNowsdtel，它现在有 3 个 long 值，并且应该基于它执行逻辑.. 如果长值是 <=900 具有长值 @987654343 的内容应该显示@，当long值为>900时，应该显示长值为2197和4003的内容。
代码如下：
public void filterRequests(final List<Long> l) {
final int size = l.size();
Log.d("lng", String.valueOf(l));
if (isNetworkAvailable()) {
if (chkBoxLiveRqsts.isChecked()) {
firebaseDatabase.child(key).addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
if (dataSnapshot.getValue() != null) {
for (int i = 0; i < size; i++){
if (l.get(i) <= 900) {
...
} else {
}
}
progressDialogAdding.dismiss();
} else {
}
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
...
});
} else if (chkBoxSFLRqsts.isChecked()) {
fastItemAdapter.clear();
firebaseDatabase.child(key).addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
if (dataSnapshot.getValue() != null) {
for (int i = 0; i < size; i++) {
if (l.get(i) > 900) {
...
} else {
}
}
progressDialogAdding.dismiss();
} else {
}
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
...
}
} else {
Snackbar snackbar = Snackbar
.make(coordinatorLayout, "No internet connection", Snackbar.LENGTH_SHORT);
snackbar.show();
progressDialogAdding.dismiss();
}
}
});
dialog = builder.create();
dialog.show();
}
lng的日志值：
D/lng: [2197, -1007, 4003]
我想要的是filterRequests(Long l) 方法应该使用holder.diffNowsdtelTV.getText().toString() 的所有值并使用它们执行逻辑。
对于含糊不清的问题，我深表歉意。请帮我解决这个问题！
【问题讨论】：
-
这里有一些minimal reproducible example 怎么样？这似乎是一个简单的问题......
-
@AxelH 你这是什么意思，兄弟？
-
您包含的代码量很多。此外，正如 AxelH 所说，这听起来像是一个简单的问题。如果您可以删除所有不必要的代码并包含所需的代码，那么其他人回答您的问题会很有帮助。此外，还不清楚您在
filterRequests(..)中要做什么。阅读他提供的链接 -
@RafiduzzamanSonnet 我已尽我所能编辑...请看一下
-
首先，您说的是
MainActivitiy.filterRequest(Long l)，但我只能找到MainActivitiy.filterRequest(final List<Long> l)，那么，如果我翻译您想要的方法，我理解的是What are captured variables in Java Local Classes。这可以在 5line 的示例中恢复。 PS：请不要兄弟我;）
标签： java android methods android-context instanceof