java - Resources$NotFoundException -


so whenever run app, it'll instantly crash , give me following error:

no package identifier when getting value resource number 0x00000000 fatal exception: main    process: com.example.wessel.weer, pid: 3095    android.content.res.resources$notfoundexception: resource id #0x0        @ android.content.res.resources.getvalue(resources.java:1351)        @ android.content.res.resources.getdrawable(resources.java:804)        @ android.content.res.resources.getdrawable(resources.java:771)        @ com.example.wessel.weer.mainactivity.servicesuccess(mainactivity.java:52)        @ com.example.wessel.weer.service.yahooweatherservice$1.onpostexecute(yahooweatherservice.java:91)        @ com.example.wessel.weer.service.yahooweatherservice$1.onpostexecute(yahooweatherservice.java:40)        @ android.os.asynctask.finish(asynctask.java:651)        @ android.os.asynctask.-wrap1(asynctask.java)        @ android.os.asynctask$internalhandler.handlemessage(asynctask.java:668)        @ android.os.handler.dispatchmessage(handler.java:102)        @ android.os.looper.loop(looper.java:148)        @ android.app.activitythread.main(activitythread.java:5417)        @ java.lang.reflect.method.invoke(native method)        @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:726)        @ com.android.internal.os.zygoteinit.main(zygoteinit.java:616)

is there way manually fix this? how import library?

edit: here's mainactivity:

package com.example.wessel.weer;  import android.app.progressdialog; import android.graphics.drawable.drawable; import android.support.v7.app.appcompatactivity; import android.os.bundle; import android.widget.imageview; import android.widget.textview; import android.widget.toast;  import com.example.wessel.weer.data.channel; import com.example.wessel.weer.data.item; import com.example.wessel.weer.service.weatherservicecallback; import com.example.wessel.weer.service.yahooweatherservice;  public class mainactivity extends appcompatactivity implements weatherservicecallback {  private imageview weathericonimageview; private textview temperaturetextview; private textview conditiontextview; private textview locationtextview;  private yahooweatherservice service; private progressdialog dialog;  @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_main);      weathericonimageview = (imageview)findviewbyid(r.id.weathericonimageview);     temperaturetextview = (textview)findviewbyid(r.id.temperaturetextview);     conditiontextview = (textview)findviewbyid(r.id.conditiontextview);     locationtextview = (textview)findviewbyid(r.id.locationtextview);      service = new yahooweatherservice(this);     dialog = new progressdialog(this);     dialog.setmessage("laden...");     dialog.show();      service.refreshweather("austin, tx"); }  @override public void servicesuccess(channel channel) {     dialog.hide();      item item = channel.getitem();     int resourceid = getresources().getidentifier("drawable/icon_" + item.getcondition().getcode(), null, getpackagename());      @suppresswarnings("deprecation")     drawable weathericondrawable = getresources().getdrawable(resourceid);      weathericonimageview.setimagedrawable(weathericondrawable);      temperaturetextview.settext(item.getcondition().gettemperature()+ "\u00b0" +channel.getunits().gettemperature());     conditiontextview.settext(item.getcondition().getdescription());     //conditiontextview.settext(condition.getdescription());     locationtextview.settext(service.getlocation()); }  @override public void servicefailure(exception exception) {     dialog.hide();     toast.maketext(this, exception.getmessage(), toast.length_long).show(); } }

also here's activity_main.xml:

<?xml version="1.0" encoding="utf-8"?> <relativelayout 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:paddingbottom="@dimen/activity_vertical_margin" android:paddingleft="@dimen/activity_horizontal_margin" android:paddingright="@dimen/activity_horizontal_margin" android:paddingtop="@dimen/activity_vertical_margin" tools:context="com.example.wessel.weer.mainactivity">  <imageview     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:id="@+id/weathericonimageview"     android:src="@drawable/cna"     android:layout_alignparenttop="true"     android:layout_centerhorizontal="true" />  <textview     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:textappearance="?android:attr/textappearancelarge"     android:text="@string/temperature"     android:id="@+id/temperaturetextview"     android:layout_below="@+id/weathericonimageview"     android:layout_centerhorizontal="true" />  <textview     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:textappearance="?android:attr/textappearancesmall"     android:text="@string/condition"     android:id="@+id/conditiontextview"     android:layout_below="@+id/temperaturetextview"     android:layout_centerhorizontal="true" />  <textview     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:textappearance="?android:attr/textappearancemedium"     android:text="@string/location"     android:id="@+id/locationtextview"     android:layout_below="@+id/conditiontextview"     android:layout_centerhorizontal="true" />  <imageview     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:src="@drawable/yahoo_logo"     android:layout_alignparentbottom="true"     android:layout_centerhorizontal="true" /> </relativelayout>

hope i've included enough now.

you failing check return value of getidentifier()

int resourceid = getresources().getidentifier("drawable/icon_" + item.getcondition().getcode(), null, getpackagename());

the documentation of getidentifier() says

returns 0 if no such resource found. (0 not valid resource id.)

to figure out why no such resource being found, have evaluate , contemplate this:

"drawable/icon_" + item.getcondition().getcode()

which needless offers opportunities evaluate @ runtime not in fixed list of resources packed in apk.


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