android - 滚动时回收器查看初始滞后
问题描述
所以我有一个非常基本的回收站视图，其中项目位于 cardViews 中。没有图片加载，它只是cardViews上表示的数据。当从服务器加载数据时，虽然最初尝试滚动但它开始滞后。一段时间后，滞后消失了。有什么问题？我的适配器代码如下。
public class TeacherJobBoardAdapter extends
RecyclerView.Adapter<TeacherJobBoardAdapter.ViewHolder> {
public class ViewHolder extends RecyclerView.ViewHolder {
TextView salary, location,numberOfStudents,curriculum,teacherGender,class1,class2,gender1,gender2,daysInWeek, std1Subject, std2Subject,time;
LinearLayout linearLayoutStd2;
ImageView doneTick;
CardView v;
SlideToActView slider;
AnimatedVectorDrawable animated;
Context context;
public ViewHolder(View itemView, Context context) {
super(itemView);
this.context = context;
v = itemView.findViewById(R.id.card);
slider = itemView.findViewById(R.id.slider_teacherJobBoard);
doneTick = itemView.findViewById(R.id.doneTick_teacherJobBoard);
animated = (AnimatedVectorDrawable) doneTick.getDrawable();
numberOfStudents = itemView.findViewById(R.id.spn_teacherJobBoard_numberOfStudents);
linearLayoutStd2 = itemView.findViewById(R.id.linlayout_teacherJobBoard_std2);
location = itemView.findViewById(R.id.txt_teacherJobBoard_location);
salary = itemView.findViewById(R.id.txt_teacherJobBoard_salary);
curriculum = itemView.findViewById(R.id.txt_teacherJobBoard_curriculum);
class1 = itemView.findViewById(R.id.txt_teacherJobBoard_std1Class);
class2 = itemView.findViewById(R.id.txt_teacherJobBoard_std2Class);
gender1 = itemView.findViewById(R.id.txt_teacherJobBoard_std1Gender);
gender2 = itemView.findViewById(R.id.txt_teacherJobBoard_std2Gender);
teacherGender = itemView.findViewById(R.id.txt_teacherJobBoard_tutorGender);
daysInWeek = itemView.findViewById(R.id.txt_teacherJobBoard_daysInWeek);
std1Subject = itemView.findViewById(R.id.txt_teacherJobBoard_std1Subject);
std2Subject = itemView.findViewById(R.id.txt_teacherJobBoard_std2Subject);
time = itemView.findViewById(R.id.txt_teacherJobBoard_time);
}
}
private List<ParseObject> mObjects;
public TeacherJobBoardAdapter(List<ParseObject> object) {
mObjects = object;
}
@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
Context context = parent.getContext();
LayoutInflater inflater = LayoutInflater.from(context);
// Inflate the custom layout
View contactView = inflater.inflate(R.layout.item_teacher_job_board, parent, false);
// Return a new holder instance
return new ViewHolder(contactView,context);
}
@Override
public void onBindViewHolder(@NonNull final ViewHolder holder, int pos) {
int position = pos;
holder.salary.setText(""+mObjects.get(pos).getInt("salary"));
holder.location.setText(mObjects.get(pos).getString("location"));
holder.numberOfStudents.setText(mObjects.get(pos).getInt("numberOfStudents")+"");
holder.curriculum.setText(mObjects.get(pos).getString("curriculum"));
holder.teacherGender.setText(mObjects.get(pos).getString("teacherGender"));
if (mObjects.get(pos).getInt("numberOfStudents")==1){
holder.linearLayoutStd2.setVisibility(View.GONE);
}else{
holder.gender2.setText(mObjects.get(pos).getString("gender2"));
holder.class2.setText(mObjects.get(pos).getString("class2"));
holder.std2Subject.setText(mObjects.get(pos).getString("subject2")+"");
}
holder.gender1.setText(mObjects.get(pos).getString("gender1"));
holder.class1.setText(mObjects.get(pos).getString("class1"));
holder.std1Subject.setText(mObjects.get(pos).getString("subject1")+"");
holder.daysInWeek.setText(mObjects.get(pos).getInt("daysInWeek")+"");
holder.time.setText(mObjects.get(pos).getString("time"));
holder.slider.setOnSlideCompleteListener(new SlideToActView.OnSlideCompleteListener() {
@Override
public void onSlideComplete(SlideToActView slideToActView) {
TeacherJobBoard myActivity = (TeacherJobBoard) holder.context;
myActivity.apply(slideToActView,holder.doneTick,holder.animated);
}
});
}
@Override
public int getItemCount() {
return mObjects.size();
}
}
这是项目布局的 xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<androidx.cardview.widget.CardView
android:id="@+id/card"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="@dimen/_4sdp"
android:layout_marginRight="@dimen/_4sdp"
app:cardBackgroundColor="#FFFFFF"
app:cardCornerRadius="@dimen/_5sdp"
app:cardElevation="@dimen/_3sdp"
app:cardUseCompatPadding="true">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:orientation="vertical"
android:weightSum="10">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:weightSum="3">
<TextView
android:id="@+id/txt_teacherJobBoard_location"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="2"
android:fontFamily="@font/kiona_regular"
android:paddingLeft="@dimen/_8sdp"
android:paddingTop="@dimen/_8sdp"
android:paddingBottom="@dimen/_8sdp"
android:text="ADABOR"
android:textColor="@color/tutor_bear_dark_blue"
android:textSize="@dimen/_20sdp" />
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="vertical">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="end"
android:layout_weight="1"
android:fontFamily="@font/kiona_regular"
android:paddingTop="@dimen/_8sdp"
android:paddingEnd="@dimen/_8sdp"
android:text="SALARY"
android:textAlignment="textEnd"
android:textColor="@color/tutor_bear_dark_blue"
android:textSize="@dimen/_20sdp" />
<TextView
android:id="@+id/txt_teacherJobBoard_salary"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="end"
android:layout_weight="1"
android:drawableEnd="@drawable/ic_taka"
android:fontFamily="@font/kiona_regular"
android:paddingBottom="@dimen/_8sdp"
android:text="9000"
android:textAlignment="textEnd"
android:textColor="@color/tutor_bear_dark_blue"
android:textSize="@dimen/_20sdp" />
</LinearLayout>
</LinearLayout>
<View
android:layout_width="match_parent"
android:layout_height="@dimen/_1sdp"
android:layout_marginLeft="@dimen/_10sdp"
android:layout_marginRight="@dimen/_10sdp"
android:background="@color/tutor_bear_dark_blue" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="@dimen/_2sdp"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="@dimen/_7sdp"
android:orientation="horizontal"
android:weightSum="2">
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:fontFamily="@font/roboto_light"
android:paddingStart="@dimen/_7sdp"
android:text="@string/studentViewMyPost_numberOfStudents"
android:textColor="@color/tutor_bear_dark_blue"
android:textSize="@dimen/_13sdp" />
<TextView
android:id="@+id/spn_teacherJobBoard_numberOfStudents"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:fontFamily="@font/roboto_light"
android:paddingEnd="@dimen/_7sdp"
android:text="2"
android:textAlignment="textEnd"
android:textColor="@color/tutor_bear_dark_blue"
android:textSize="@dimen/_13sdp" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="@dimen/_6sdp"
android:orientation="horizontal">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="@font/roboto_light"
android:paddingLeft="@dimen/_7sdp"
android:text="@string/teacherJobBoard_curriculum"
android:textColor="@color/tutor_bear_dark_blue"
android:textSize="@dimen/_13sdp" />
<View
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_weight="1" />
<TextView
android:id="@+id/txt_teacherJobBoard_curriculum"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="@font/roboto_light"
android:paddingEnd="@dimen/_7sdp"
android:text="English Medium"
android:textAlignment="textEnd"
android:textColor="@color/tutor_bear_dark_blue"
android:textSize="@dimen/_13sdp" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="@dimen/_7sdp"
android:orientation="horizontal">
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:fontFamily="@font/roboto_light"
android:paddingStart="@dimen/_7sdp"
android:text="Student 1"
android:textColor="@color/tutor_bear_dark_blue"
android:textSize="@dimen/_13sdp" />
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="vertical">
<TextView
android:id="@+id/txt_teacherJobBoard_std1Subject"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="end"
android:fontFamily="@font/roboto_light"
android:paddingEnd="@dimen/_7sdp"
android:text="Physics, Chemistry, Maths, Psycology"
android:textAlignment="textEnd"
android:textColor="@color/tutor_bear_dark_blue"
android:textSize="@dimen/_13sdp" />
<TextView
android:id="@+id/txt_teacherJobBoard_std1Gender"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="end"
android:layout_marginTop="@dimen/_3sdp"
android:drawableStart="@drawable/ic_male"
android:fontFamily="@font/roboto_light"
android:paddingEnd="@dimen/_7sdp"
android:text="Male"
android:textAlignment="textEnd"
android:textColor="@color/tutor_bear_dark_blue"
android:textSize="@dimen/_13sdp" />
<TextView
android:id="@+id/txt_teacherJobBoard_std1Class"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="end"
android:layout_marginTop="@dimen/_3sdp"
android:layout_marginBottom="@dimen/_3sdp"
android:fontFamily="@font/roboto_light"
android:paddingEnd="@dimen/_7sdp"
android:text="Class 8"
android:textAlignment="textEnd"
android:textColor="@color/tutor_bear_dark_blue"
android:textSize="@dimen/_13sdp" />
</LinearLayout>
</LinearLayout>
<LinearLayout
android:id="@+id/linlayout_teacherJobBoard_std2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="@dimen/_7sdp"
android:orientation="horizontal">
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:fontFamily="@font/roboto_light"
android:paddingStart="@dimen/_7sdp"
android:text="Student 2"
android:textColor="@color/tutor_bear_dark_blue"
android:textSize="@dimen/_13sdp" />
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="vertical">
<TextView
android:id="@+id/txt_teacherJobBoard_std2Subject"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="end"
android:fontFamily="@font/roboto_light"
android:paddingEnd="@dimen/_7sdp"
android:text="Physics, Chemistry, Maths, Psycology"
android:textAlignment="textEnd"
android:textColor="@color/tutor_bear_dark_blue"
android:textSize="@dimen/_13sdp" />
<TextView
android:id="@+id/txt_teacherJobBoard_std2Gender"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="end"
android:layout_marginTop="@dimen/_3sdp"
android:drawableStart="@drawable/ic_male"
android:fontFamily="@font/roboto_light"
android:paddingEnd="@dimen/_7sdp"
android:text="Male"
android:textAlignment="textEnd"
android:textColor="@color/tutor_bear_dark_blue"
android:textSize="@dimen/_13sdp" />
<TextView
android:id="@+id/txt_teacherJobBoard_std2Class"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="end"
android:layout_marginTop="@dimen/_3sdp"
android:layout_marginBottom="@dimen/_3sdp"
android:fontFamily="@font/roboto_light"
android:paddingEnd="@dimen/_7sdp"
android:text="Class 8"
android:textAlignment="textEnd"
android:textColor="@color/tutor_bear_dark_blue"
android:textSize="@dimen/_13sdp" />
</LinearLayout>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="@dimen/_6sdp"
android:orientation="horizontal">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="@font/roboto_light"
android:paddingLeft="@dimen/_7sdp"
android:text="@string/studentViewMyPost_preferredTutorGender"
android:textColor="@color/tutor_bear_dark_blue"
android:textSize="@dimen/_13sdp" />
<View
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_weight="1" />
<TextView
android:id="@+id/txt_teacherJobBoard_tutorGender"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:drawableStart="@drawable/ic_female"
android:fontFamily="@font/roboto_light"
android:paddingEnd="@dimen/_7sdp"
android:text="Female"
android:textAlignment="textEnd"
android:textColor="@color/tutor_bear_dark_blue"
android:textSize="@dimen/_13sdp" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="@dimen/_6sdp"
android:orientation="horizontal">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="@font/roboto_light"
android:paddingLeft="@dimen/_7sdp"
android:text="@string/studentViewMyPost_daysInWeek"
android:textColor="@color/tutor_bear_dark_blue"
android:textSize="@dimen/_13sdp" />
<View
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_weight="1" />
<TextView
android:id="@+id/txt_teacherJobBoard_daysInWeek"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:drawableStart="@drawable/ic_calender"
android:fontFamily="@font/roboto_light"
android:paddingEnd="@dimen/_7sdp"
android:text="5"
android:textColor="@color/tutor_bear_dark_blue"
android:textSize="@dimen/_13sdp" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="@dimen/_6sdp"
android:layout_marginBottom="@dimen/_8sdp"
android:orientation="horizontal">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="@font/roboto_light"
android:paddingLeft="@dimen/_7sdp"
android:text="@string/studentViewMyPost_preferredTime"
android:textColor="@color/tutor_bear_dark_blue"
android:textSize="@dimen/_13sdp" />
<View
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_weight="1" />
<TextView
android:id="@+id/txt_teacherJobBoard_time"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:drawableStart="@drawable/ic_time_new"
android:fontFamily="@font/roboto_light"
android:paddingEnd="@dimen/_7sdp"
android:text="9:00 PM - 6:00 AM"
android:textColor="@color/tutor_bear_dark_blue"
android:textSize="@dimen/_13sdp" />
</LinearLayout>
<com.ncorti.slidetoact.SlideToActView
android:id="@+id/slider_teacherJobBoard"
android:layout_width="@dimen/_220sdp"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="@dimen/_10sdp"
android:layout_marginBottom="@dimen/_10sdp"
android:clickable="false"
android:hapticFeedbackEnabled="true"
app:animation_duration="250"
app:area_margin="@dimen/_5sdp"
app:bump_vibration="60"
app:complete_icon="@drawable/anim_loading_spinner"
app:icon_margin="@dimen/_5sdp"
app:inner_color="@color/color_white"
app:outer_color="@color/tutor_bear_dark_blue"
app:slider_height="@dimen/_40sdp"
app:slider_icon="@drawable/ic_next_arrow"
app:text="Slide to Apply" />
<ImageView
android:id="@+id/doneTick_teacherJobBoard"
android:layout_width="@dimen/_40sdp"
android:layout_height="@dimen/_40sdp"
android:layout_gravity="center"
android:layout_marginTop="@dimen/_10sdp"
android:layout_marginBottom="@dimen/_10sdp"
android:src="@drawable/done_tick_new_anim"
android:visibility="gone" />
</LinearLayout>
</LinearLayout>
</androidx.cardview.widget.CardView>
</LinearLayout>
解决方案
尝试创建应用程序的发布版本。调试版本通常会显示少量的动画延迟。
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