java.lang.Integer 无法转换为 java.lang.Double
java.lang.Integer cannot be cast to java.lang.Double
我收到一个奇怪的错误，其中 android 不允许我从 ArrayList 分配一个项目，因为它将它检测为整数
仅当该位置的项目是 12 而不是 12.0
的整数时才会发生这种情况
我的代码
public class CategoryAdapter extends BaseAdapter {
private final Context context;
private ArrayList<Category> categories ;
private final ArrayList<Double> items;
public CategoryAdapter(Context context, ArrayList<Double> i) {
this.context = context;
categories = Category.getActiveCategories();
if(i.size()==0)
{
Double [] ar = new Double[]{0.0,0.0,0.0,0.0};
items = new ArrayList<Double>(Arrays.asList(ar));
}
else
{
items = i;
}
}
@Override
public int getCount() {
return items.size();
}
@Override
public Double getItem(int position) {
return items.get(position);
}
@Override
public long getItemId(int position) {
// TODO implement own logic with ID
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View rowView;
if (convertView == null) {
rowView = inflater.inflate(R.layout.item_ais_category_list, parent, false);
}
else {
rowView = convertView;
}
TextView category = (TextView) rowView.findViewById(R.id.tv_ais_category_item);
TextView tvThreatLevel = (TextView) rowView.findViewById(R.id.tv_ais_threat_level_item);
View circle = rowView.findViewById(R.id.v_ais_circle);
category.setText(categories.get(position).name);
double threatlevel = 0;
try {
threatlevel = (double) items.get(position);
}
catch (Exception e)
{
e.printStackTrace();
Log.d("array",items.toString());
Log.d("count",Integer.toString(position));
}
if(threatlevel<=10d) {
tvThreatLevel.setText("Safe");
tvThreatLevel.setTextColor(context.getResources().getColor(R.color.alert_low));
}
else if(threatlevel>10d&&threatlevel<=20d) {
tvThreatLevel.setText("Low");
tvThreatLevel.setTextColor(context.getResources().getColor(R.color.alert_low));
}
else if(threatlevel >20d &&threatlevel<=40d)
{
tvThreatLevel.setText("Medium");
tvThreatLevel.setTextColor(context.getResources().getColor(R.color.alert_med));
}
else
{
tvThreatLevel.setText("High");
tvThreatLevel.setTextColor(context.getResources().getColor(R.color.alert_high));
}
GradientDrawable bg = (GradientDrawable)circle.getBackground();
int color = Color.parseColor(categories.get(position).color);
bg.setColor(color);
return rowView;
}
}
这是错误的堆栈跟踪
06-18 00:52:24.324 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.Double
06-18 00:52:24.325 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at com.flagaspot.flagger.Utilities.CategoryAdapter$override.getView(CategoryAdapter.java:76)
06-18 00:52:24.325 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at com.flagaspot.flagger.Utilities.CategoryAdapter$override.access$dispatch(CategoryAdapter.java)
06-18 00:52:24.326 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at com.flagaspot.flagger.Utilities.CategoryAdapter.getView(CategoryAdapter.java:0)
06-18 00:52:24.326 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.AbsListView.obtainView(AbsListView.java:2346)
06-18 00:52:24.326 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.ListView.makeAndAddView(ListView.java:1876)
06-18 00:52:24.326 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.ListView.fillDown(ListView.java:702)
06-18 00:52:24.326 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.ListView.fillFromTop(ListView.java:763)
06-18 00:52:24.326 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.ListView.layoutChildren(ListView.java:1685)
06-18 00:52:24.326 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.AbsListView.onLayout(AbsListView.java:2148)
06-18 00:52:24.326 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.View.layout(View.java:16639)
06-18 00:52:24.326 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.ViewGroup.layout(ViewGroup.java:5437)
06-18 00:52:24.326 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1743)
06-18 00:52:24.326 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1586)
06-18 00:52:24.326 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.LinearLayout.onLayout(LinearLayout.java:1495)
06-18 00:52:24.326 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.View.layout(View.java:16639)
06-18 00:52:24.326 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.ViewGroup.layout(ViewGroup.java:5437)
06-18 00:52:24.326 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
06-18 00:52:24.327 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
06-18 00:52:24.327 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.View.layout(View.java:16639)
06-18 00:52:24.327 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.ViewGroup.layout(ViewGroup.java:5437)
06-18 00:52:24.327 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
06-18 00:52:24.327 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
06-18 00:52:24.327 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.View.layout(View.java:16639)
06-18 00:52:24.327 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.ViewGroup.layout(ViewGroup.java:5437)
06-18 00:52:24.327 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1743)
06-18 00:52:24.327 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1586)
06-18 00:52:24.327 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.LinearLayout.onLayout(LinearLayout.java:1495)
06-18 00:52:24.327 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.View.layout(View.java:16639)
06-18 00:52:24.327 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.ViewGroup.layout(ViewGroup.java:5437)
06-18 00:52:24.327 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.support.v4.widget.DrawerLayout.onLayout(DrawerLayout.java:1187)
06-18 00:52:24.328 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.View.layout(View.java:16639)
06-18 00:52:24.328 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.ViewGroup.layout(ViewGroup.java:5437)
06-18 00:52:24.328 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
06-18 00:52:24.328 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
06-18 00:52:24.328 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.View.layout(View.java:16639)
06-18 00:52:24.328 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.ViewGroup.layout(ViewGroup.java:5437)
06-18 00:52:24.328 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1743)
06-18 00:52:24.328 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1586)
06-18 00:52:24.328 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.LinearLayout.onLayout(LinearLayout.java:1495)
06-18 00:52:24.328 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.View.layout(View.java:16639)
06-18 00:52:24.328 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.ViewGroup.layout(ViewGroup.java:5437)
06-18 00:52:24.328 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
06-18 00:52:24.328 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
06-18 00:52:24.328 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.View.layout(View.java:16639)
06-18 00:52:24.328 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.ViewGroup.layout(ViewGroup.java:5437)
06-18 00:52:24.328 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1743)
06-18 00:52:24.329 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1586)
06-18 00:52:24.329 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.LinearLayout.onLayout(LinearLayout.java:1495)
06-18 00:52:24.329 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.View.layout(View.java:16639)
06-18 00:52:24.329 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.ViewGroup.layout(ViewGroup.java:5437)
06-18 00:52:24.329 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
06-18 00:52:24.329 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
06-18 00:52:24.329 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at com.android.internal.policy.PhoneWindow$DecorView.onLayout(PhoneWindow.java:2934)
06-18 00:52:24.329 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.View.layout(View.java:16639)
06-18 00:52:24.329 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.ViewGroup.layout(ViewGroup.java:5437)
06-18 00:52:24.329 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2171)
06-18 00:52:24.329 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1931)
06-18 00:52:24.329 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1107)
06-18 00:52:24.329 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6013)
06-18 00:52:24.329 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.Choreographer$CallbackRecord.run(Choreographer.java:858)
06-18 00:52:24.329 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.Choreographer.doCallbacks(Choreographer.java:670)
06-18 00:52:24.330 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.Choreographer.doFrame(Choreographer.java:606)
06-18 00:52:24.330 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:844)
06-18 00:52:24.330 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.os.Handler.handleCallback(Handler.java:739)
06-18 00:52:24.330 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.os.Handler.dispatchMessage(Handler.java:95)
06-18 00:52:24.331 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.os.Looper.loop(Looper.java:148)
06-18 00:52:24.331 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.app.ActivityThread.main(ActivityThread.java:5456)
06-18 00:52:24.331 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at java.lang.reflect.Method.invoke(Native Method)
06-18 00:52:24.331 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
06-18 00:52:24.331 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616
例如，如果数组是
[251.03, 1086.97, 891.53, 615]
错误发生在位置 3
我是不是做错了什么，或者有什么解决方法吗？
提前致谢
the error is on line. threatlevel = (double) items.get(position);
问题似乎是它不想同时投射和自动装箱。由于 Double 和 Integer 都扩展了 Number，您可以使用：
threatlevel = items.get(position).doubleValue();
我收到一个奇怪的错误，其中 android 不允许我从 ArrayList 分配一个项目，因为它将它检测为整数 仅当该位置的项目是 12 而不是 12.0
的整数时才会发生这种情况我的代码
public class CategoryAdapter extends BaseAdapter {
private final Context context;
private ArrayList<Category> categories ;
private final ArrayList<Double> items;
public CategoryAdapter(Context context, ArrayList<Double> i) {
this.context = context;
categories = Category.getActiveCategories();
if(i.size()==0)
{
Double [] ar = new Double[]{0.0,0.0,0.0,0.0};
items = new ArrayList<Double>(Arrays.asList(ar));
}
else
{
items = i;
}
}
@Override
public int getCount() {
return items.size();
}
@Override
public Double getItem(int position) {
return items.get(position);
}
@Override
public long getItemId(int position) {
// TODO implement own logic with ID
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View rowView;
if (convertView == null) {
rowView = inflater.inflate(R.layout.item_ais_category_list, parent, false);
}
else {
rowView = convertView;
}
TextView category = (TextView) rowView.findViewById(R.id.tv_ais_category_item);
TextView tvThreatLevel = (TextView) rowView.findViewById(R.id.tv_ais_threat_level_item);
View circle = rowView.findViewById(R.id.v_ais_circle);
category.setText(categories.get(position).name);
double threatlevel = 0;
try {
threatlevel = (double) items.get(position);
}
catch (Exception e)
{
e.printStackTrace();
Log.d("array",items.toString());
Log.d("count",Integer.toString(position));
}
if(threatlevel<=10d) {
tvThreatLevel.setText("Safe");
tvThreatLevel.setTextColor(context.getResources().getColor(R.color.alert_low));
}
else if(threatlevel>10d&&threatlevel<=20d) {
tvThreatLevel.setText("Low");
tvThreatLevel.setTextColor(context.getResources().getColor(R.color.alert_low));
}
else if(threatlevel >20d &&threatlevel<=40d)
{
tvThreatLevel.setText("Medium");
tvThreatLevel.setTextColor(context.getResources().getColor(R.color.alert_med));
}
else
{
tvThreatLevel.setText("High");
tvThreatLevel.setTextColor(context.getResources().getColor(R.color.alert_high));
}
GradientDrawable bg = (GradientDrawable)circle.getBackground();
int color = Color.parseColor(categories.get(position).color);
bg.setColor(color);
return rowView;
}
}
这是错误的堆栈跟踪
06-18 00:52:24.324 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.Double
06-18 00:52:24.325 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at com.flagaspot.flagger.Utilities.CategoryAdapter$override.getView(CategoryAdapter.java:76)
06-18 00:52:24.325 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at com.flagaspot.flagger.Utilities.CategoryAdapter$override.access$dispatch(CategoryAdapter.java)
06-18 00:52:24.326 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at com.flagaspot.flagger.Utilities.CategoryAdapter.getView(CategoryAdapter.java:0)
06-18 00:52:24.326 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.AbsListView.obtainView(AbsListView.java:2346)
06-18 00:52:24.326 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.ListView.makeAndAddView(ListView.java:1876)
06-18 00:52:24.326 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.ListView.fillDown(ListView.java:702)
06-18 00:52:24.326 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.ListView.fillFromTop(ListView.java:763)
06-18 00:52:24.326 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.ListView.layoutChildren(ListView.java:1685)
06-18 00:52:24.326 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.AbsListView.onLayout(AbsListView.java:2148)
06-18 00:52:24.326 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.View.layout(View.java:16639)
06-18 00:52:24.326 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.ViewGroup.layout(ViewGroup.java:5437)
06-18 00:52:24.326 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1743)
06-18 00:52:24.326 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1586)
06-18 00:52:24.326 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.LinearLayout.onLayout(LinearLayout.java:1495)
06-18 00:52:24.326 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.View.layout(View.java:16639)
06-18 00:52:24.326 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.ViewGroup.layout(ViewGroup.java:5437)
06-18 00:52:24.326 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
06-18 00:52:24.327 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
06-18 00:52:24.327 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.View.layout(View.java:16639)
06-18 00:52:24.327 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.ViewGroup.layout(ViewGroup.java:5437)
06-18 00:52:24.327 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
06-18 00:52:24.327 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
06-18 00:52:24.327 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.View.layout(View.java:16639)
06-18 00:52:24.327 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.ViewGroup.layout(ViewGroup.java:5437)
06-18 00:52:24.327 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1743)
06-18 00:52:24.327 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1586)
06-18 00:52:24.327 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.LinearLayout.onLayout(LinearLayout.java:1495)
06-18 00:52:24.327 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.View.layout(View.java:16639)
06-18 00:52:24.327 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.ViewGroup.layout(ViewGroup.java:5437)
06-18 00:52:24.327 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.support.v4.widget.DrawerLayout.onLayout(DrawerLayout.java:1187)
06-18 00:52:24.328 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.View.layout(View.java:16639)
06-18 00:52:24.328 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.ViewGroup.layout(ViewGroup.java:5437)
06-18 00:52:24.328 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
06-18 00:52:24.328 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
06-18 00:52:24.328 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.View.layout(View.java:16639)
06-18 00:52:24.328 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.ViewGroup.layout(ViewGroup.java:5437)
06-18 00:52:24.328 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1743)
06-18 00:52:24.328 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1586)
06-18 00:52:24.328 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.LinearLayout.onLayout(LinearLayout.java:1495)
06-18 00:52:24.328 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.View.layout(View.java:16639)
06-18 00:52:24.328 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.ViewGroup.layout(ViewGroup.java:5437)
06-18 00:52:24.328 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
06-18 00:52:24.328 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
06-18 00:52:24.328 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.View.layout(View.java:16639)
06-18 00:52:24.328 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.ViewGroup.layout(ViewGroup.java:5437)
06-18 00:52:24.328 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1743)
06-18 00:52:24.329 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1586)
06-18 00:52:24.329 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.LinearLayout.onLayout(LinearLayout.java:1495)
06-18 00:52:24.329 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.View.layout(View.java:16639)
06-18 00:52:24.329 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.ViewGroup.layout(ViewGroup.java:5437)
06-18 00:52:24.329 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
06-18 00:52:24.329 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
06-18 00:52:24.329 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at com.android.internal.policy.PhoneWindow$DecorView.onLayout(PhoneWindow.java:2934)
06-18 00:52:24.329 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.View.layout(View.java:16639)
06-18 00:52:24.329 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.ViewGroup.layout(ViewGroup.java:5437)
06-18 00:52:24.329 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2171)
06-18 00:52:24.329 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1931)
06-18 00:52:24.329 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1107)
06-18 00:52:24.329 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6013)
06-18 00:52:24.329 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.Choreographer$CallbackRecord.run(Choreographer.java:858)
06-18 00:52:24.329 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.Choreographer.doCallbacks(Choreographer.java:670)
06-18 00:52:24.330 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.Choreographer.doFrame(Choreographer.java:606)
06-18 00:52:24.330 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:844)
06-18 00:52:24.330 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.os.Handler.handleCallback(Handler.java:739)
06-18 00:52:24.330 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.os.Handler.dispatchMessage(Handler.java:95)
06-18 00:52:24.331 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.os.Looper.loop(Looper.java:148)
06-18 00:52:24.331 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at android.app.ActivityThread.main(ActivityThread.java:5456)
06-18 00:52:24.331 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at java.lang.reflect.Method.invoke(Native Method)
06-18 00:52:24.331 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
06-18 00:52:24.331 14845-14845/com.example.pulkitjuneja.flag_a_spot W/System.err: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616
例如，如果数组是
[251.03, 1086.97, 891.53, 615]
错误发生在位置 3
我是不是做错了什么，或者有什么解决方法吗？ 提前致谢
the error is on line.
threatlevel = (double) items.get(position);
问题似乎是它不想同时投射和自动装箱。由于 Double 和 Integer 都扩展了 Number，您可以使用：
threatlevel = items.get(position).doubleValue();