问题
error:
and mainactivity code is empty and layout is:
<?xml version="1.0" encoding="UTF-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<fragment
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/fragment"
android:name="com.example.circularview.CarFragment"
tools:layout="@layout/fragment_car" />
</RelativeLayout>
fragment (carFragment) code:
public class CarFragment extends Fragment {
View rootView;
ViewPager event_pager;
private ArrayList<MyLocation> latLngsArrayList;
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
rootView = inflater.inflate(R.layout.fragment_car, container, false);
event_pager = rootView.findViewById(R.id.event_pager);
latLngsArrayList = new ArrayList<>();
latLngsArrayList = GlobalUtils.getLatLongArray();
MapViewPagerAdapter adapter = new MapViewPagerAdapter(getActivity(), latLngsArrayList);
event_pager.setAdapter(adapter);
return rootView;
}
}
and CarFragment layout code:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<TextView
android:id="@+id/mapView"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintVertical_bias="1.0"/>
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.77"
tools:layout_editor_absoluteX="0dp"
tools:layout_editor_absoluteY="507dp"/>
<androidx.viewpager.widget.ViewPager
android:id="@+id/event_pager"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_alignParentBottom="true"
android:layout_marginTop="0dp"
app:layout_constraintBottom_toBottomOf="@+id/mapView"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline">
</androidx.viewpager.widget.ViewPager>
</androidx.constraintlayout.widget.ConstraintLayout>
my Adapter:
public class MapViewPagerAdapter extends PagerAdapter {
View itemView;
ArrayList<MyLocation> arr_LocationList;
Context context;
public MapViewPagerAdapter(Context context, ArrayList<MyLocation> arr_ExploreList) {
this.context = context;
this.arr_LocationList = arr_ExploreList;
}
@Override
public int getCount() {
return arr_LocationList.size();
}
@Override
public boolean isViewFromObject(View arg0, Object arg1) {
return arg0 == arg1;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((View) object);
}
@NonNull
@Override
public View instantiateItem(ViewGroup container, int position) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
itemView = inflater.inflate(R.layout.recycler_mapview, null);
container.addView(itemView);
return itemView;
}
}
error is here in adapter:
@NonNull
@Override
public View instantiateItem(ViewGroup container, int position) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
// error error error error
itemView = inflater.inflate(R.layout.recycler_mapview, null);
container.addView(itemView);
return itemView;
}
as i think it should be from my items layout ,here it is
ITEM's Layout:
<?xml version="1.0"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingBottom="15dp"
android:paddingTop="15dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="120dp"
android:layout_marginLeft="35dp"
android:layout_marginRight="45dp"
android:background="@drawable/mapview"
android:orientation="horizontal"
android:layout_marginStart="35dp"
android:layout_marginEnd="45dp">
<com.makeramen.roundedimageview.RoundedImageView
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight=".3"
android:scaleType="fitXY"
android:src="@mipmap/car"
app:riv_corner_radius_bottom_left="20dp"
app:riv_corner_radius_top_left="20dp"
app:riv_mutate_background="true"
app:srcCompat="@mipmap/car" />
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.63"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:gravity="center|left"
android:text="Modern Era Car Servicing"
android:textColor="#000"
android:textSize="14dp"
tools:ignore="RtlHardcoded" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:text="09388695027"
android:layout_marginStart="10dp" />
</LinearLayout>
</LinearLayout>
</RelativeLayout>
logcat:
05-26 15:32:43.007 12447-12447/com.example.circularview E/dalvikvm: Could not find class 'androidx.core.view.ViewCompat$2', referenced from method androidx.core.view.ViewCompat.addOnUnhandledKeyEventListener
05-26 15:32:43.007 12447-12447/com.example.circularview E/dalvikvm: Could not find class 'android.view.WindowInsets', referenced from method androidx.core.view.ViewCompat.dispatchApplyWindowInsets
05-26 15:32:43.017 12447-12447/com.example.circularview E/dalvikvm: Could not find class 'android.view.WindowInsets', referenced from method androidx.core.view.ViewCompat.onApplyWindowInsets
05-26 15:32:43.017 12447-12447/com.example.circularview E/dalvikvm: Could not find class 'android.view.View$OnUnhandledKeyEventListener', referenced from method androidx.core.view.ViewCompat.removeOnUnhandledKeyEventListener
05-26 15:32:43.017 12447-12447/com.example.circularview E/dalvikvm: Could not find class 'androidx.core.view.ViewCompat$1', referenced from method androidx.core.view.ViewCompat.setOnApplyWindowInsetsListener
05-26 15:32:43.057 12447-12447/com.example.circularview E/dalvikvm: Could not find class 'android.graphics.drawable.RippleDrawable', referenced from method androidx.appcompat.widget.AppCompatImageHelper.hasOverlappingRendering
05-26 15:32:43.087 12447-12447/com.example.circularview E/dalvikvm: Could not find class 'android.view.textclassifier.TextClassificationManager', referenced from method androidx.appcompat.widget.AppCompatTextClassifierHelper.getTextClassifier
05-26 15:32:43.127 12447-12447/com.example.circularview E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.circularview, PID: 12447
android.view.InflateException: Binary XML file line #12: Error inflating class <unknown>
at android.view.LayoutInflater.createView(LayoutInflater.java:620)
at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:669)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:694)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
at com.example.circularview.MapViewPagerAdapter.instantiateItem(MapViewPagerAdapter.java:43)
at com.example.circularview.MapViewPagerAdapter.instantiateItem(MapViewPagerAdapter.java:13)
at androidx.viewpager.widget.ViewPager.addNewItem(ViewPager.java:1010)
at androidx.viewpager.widget.ViewPager.populate(ViewPager.java:1158)
at androidx.viewpager.widget.ViewPager.populate(ViewPager.java:1092)
at androidx.viewpager.widget.ViewPager.onMeasure(ViewPager.java:1622)
at android.view.View.measure(View.java:16497)
at androidx.constraintlayout.widget.ConstraintLayout.onMeasure(ConstraintLayout.java:1676)
at android.view.View.measure(View.java:16497)
at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:719)
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:455)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at androidx.appcompat.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:143)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at androidx.appcompat.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:403)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2291)
at android.view.View.measure(View.java:16497)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1940)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1137)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1319)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1024)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5694)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
at android.view.Choreographer.doCallbacks(Choreographer.java:574)
at android.view.Choreographer.doFrame(Choreographer.java:544)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5019)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.reflec
all of these codes are part of another app that i made before...it works there but not here...because in the other app it work with map and users location marker and have some atrributes like slide right or slide left that i didnt used here . what is my codes problem? it works in MAINACTIVITY but not in FRAGMENT
回答1:
finally i found out where my problem is.in ITEM's LAYOUT under RelativeLayout is a Linear Layout that i set background : android:background="@drawable/mapview" and when i clean it it work perfectly.this drawable is a rounded corners view.
<?xml version="1.0" encoding="utf-8"?>
<shape
xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<corners
android:radius="20dp"/>
<gradient
android:startColor="#ffffffff"
android:centerColor="#ffffffff"
android:endColor="#ffffffff"
/>
</shape>
that its name is (drawable-v24) and i think my problem was related to (V24)
来源：https://stackoverflow.com/questions/62024952/viewpager-instantiateitem-methods-error-and-not-able-to-inflate-layout-in-fra