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Android can't get started by inflating a class?

I am new to android. I have java knowledge and am using Eclipse. At the moment, I'm trying to display the map on a tab, and I'm looking at tutorials / code to help me. :)

I saw several questions asking about this error, but I can’t understand what I am doing wrong. I use the code from here: http://vkroz.wordpress.com/2009/07/03/programming-android-%E2%80%93-map-view-within-tab-view/

Did I just miss something obvious?

The runtime exception value e:

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.test.mapintab/com.test.mapintab.MapInTabActivity}: ... android.view.InflateException: Binary XML file line #24: Error inflating class <unknown>

Line 24 is just </LinearLayout>

The whole main.xml file:

 <?xml version="1.0" encoding="utf-8"?> <TabHost xmlns:android="http://schemas.android.com/apk/res/android" android:id="@android:id/tabhost" android:layout_width="fill_parent" android:layout_height="fill_parent"> <LinearLayout android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <TabWidget android:id="@android:id/tabs" android:layout_width="fill_parent" android:layout_height="wrap_content"/> <FrameLayout android:id="@android:id/tabcontent" android:layout_width="fill_parent" android:layout_height="fill_parent"> <RelativeLayout android:id="@+id/emptylayout1" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"/> <TextView android:id="@+id/textview2" android:layout_width="fill_parent" android:layout_height="fill_parent" android:text="Details Details Details Details"/> </FrameLayout> </LinearLayout> </TabHost>

The rest of my code is the same as the related one, but I also paste it here.

MapInTabActivity.java

 package com.test.mapintab; import android.app.TabActivity; import android.content.Context; import android.content.Intent; import android.os.Bundle; import android.widget.FrameLayout; import android.widget.TabHost; import android.widget.TabHost.TabSpec; public class MapInTabActivity extends TabActivity { TabHost mTabHost; FrameLayout mFrameLayout; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); mTabHost = getTabHost(); TabSpec tabSpec = mTabHost.newTabSpec("tab_test1"); tabSpec.setIndicator("Map"); Context ctx = this.getApplicationContext(); Intent i = new Intent(ctx, MapInTabActivity.class); tabSpec.setContent(i); mTabHost.addTab(tabSpec); mTabHost.addTab(mTabHost.newTabSpec("tab_test2").setIndicator("Details").setContent(R.id.textview2)); mTabHost.setCurrentTab(0); } }

MapTabView.java:

 package com.test.mapintab; import android.os.Bundle; import com.google.android.maps.MapActivity; public class MapTabView extends MapActivity{ @Override protected void onCreate(Bundle icicle){ super.onCreate(icicle); setContentView(R.layout.maptabview); } @Override protected boolean isRouteDisplayed(){ return false; } }

maptabview.xml:

 <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/maptablayout" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <com.google.android.maps.MapView android:id="@+id/mapview" android:layout_width="fill_parent" android:layout_height="fill_parent" android:clickable="true" android:apiKey="0HRMcD5o6WrBVhmwbWpeyeavZ67PXWOvJeeCx2g"/> </RelativeLayout>

manifest:

 <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.test.mapintab" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="8" /> <uses-permission android:name="android.permission.INTERNET"></uses-permission> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"></uses-permission> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"></uses-permission> <uses-permission android:name="android.permission.ACCESS_LOCATION_EXTRA_COMMANDS"></uses-permission> <application android:icon="@drawable/ic_launcher" android:label="@string/app_name" > <uses-library android:name="com.google.android.maps"/> <activity android:name=".MapInTabActivity" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name=".MapTabView" android:label="@string/mapview_name"> <intent-filter> <category android:name="android.intent.category.EMBED"></category> <action android:name="android.intent.action.MAIN"></action> </intent-filter> </activity> </application> </manifest>

And the rest of logcat (I think the important part was the bit that I pointed at the top, but maybe there is something else that I don’t know about).

 02-05 09:49:21.239: W/dalvikvm(357): threadid=1: thread exiting with uncaught exception (group=0x4001d800) 02-05 09:49:22.616: E/AndroidRuntime(357): FATAL EXCEPTION: main 02-05 09:49:22.616: E/AndroidRuntime(357): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.test.mapintab/com.test.mapintab.MapInTabActivity}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.test.mapintab/com.test.mapintab.MapInTabActivity}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.test.mapintab/com.test.mapintab.MapInTabActivity}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.test.mapintab/com.test.mapintab.MapInTabActivity}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.test.mapintab/com.test.mapintab.MapInTabActivity}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.test.mapintab/com.test.mapintab.MapInTabActivity}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.test.mapintab/com.test.mapintab.MapInTabActivity}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.test.mapintab/com.test.mapintab.MapInTabActivity}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.test.mapintab/com.test.mapintab.MapInTabActivity}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.test.mapintab/com.test.mapintab.MapInTabActivity}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.test.mapintab/com.test.mapintab.MapInTabActivity}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.test.mapintab/com.test.mapintab.MapInTabActivity}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.test.mapintab/com.test.mapintab.MapInTabActivity}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.test.mapintab/com.test.mapintab.MapInTabActivity}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.test.mapintab/com.test.mapintab.MapInTabActivity}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.test.mapintab/com.test.mapintab.MapInTabActivity}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.test.mapintab/com.test.mapintab.MapInTabActivity}: android.view.InflateException: Binary XML file line #24: Error inflating class <unknown> 02-05 09:49:22.616: E/AndroidRuntime(357): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663) 02-05 09:49:22.616: E/AndroidRuntime(357): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) 02-05 09:49:22.616: E/AndroidRuntime(357): at android.app.ActivityThread.access$2300(ActivityThread.java:125) 02-05 09:49:22.616: E/AndroidRuntime(357): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) 02-05 09:49:22.616: E/AndroidRuntime(357): at android.os.Handler.dispatchMessage(Handler.java:99) 02-05 09:49:22.616: E/AndroidRuntime(357): at android.os.Looper.loop(Looper.java:123) 02-05 09:49:22.616: E/AndroidRuntime(357): at android.app.ActivityThread.main(ActivityThread.java:4627) 02-05 09:49:22.616: E/AndroidRuntime(357): at java.lang.reflect.Method.invokeNative(Native Method) 02-05 09:49:22.616: E/AndroidRuntime(357): at java.lang.reflect.Method.invoke(Method.java:521) 02-05 09:49:22.616: E/AndroidRuntime(357): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 02-05 09:49:22.616: E/AndroidRuntime(357): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 02-05 09:49:22.616: E/AndroidRuntime(357): at dalvik.system.NativeStart.main(Native Method) 02-05 09:49:22.616: E/AndroidRuntime(357): Caused by: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.test.mapintab/com.test.mapintab.MapInTabActivity}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.test.mapintab/com.test.mapintab.MapInTabActivity}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.test.mapintab/com.test.mapintab.MapInTabActivity}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.test.mapintab/com.test.mapintab.MapInTabActivity}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.test.mapintab/com.test.mapintab.MapInTabActivity}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.test.mapintab/com.test.mapintab.MapInTabActivity}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.test.mapintab/com.test.mapintab.MapInTabActivity}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.test.mapintab/com.test.mapintab.MapInTabActivity}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.test.mapintab/com.test.mapintab.MapInTabActivit
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3 answers

Fix it:

Binary XML file line #24: Error inflating class <unknown>

Also for your emulator, are you using the Google API version? Other versions have NOT this library.

UPDATE

http://developer.android.com/resources/tutorials/views/hello-mapview.html

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I tried an example that refers to you. His work is beautiful at the end. The manifest file says that you did not declare MapTabView activity in the manifest file. Use this in your manifest

 <activity android:name=".MapTabView" android:label="@string/mapview_name"> <intent-filter> <category android:name="android.intent.category.EMBED"></category> <action android:name="android.intent.action.MAIN"></action> </intent-filter> </activity>

Hope this helps!

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Whenever you borrow code, you need to make sure that you understand all this, because a lot can go wrong. The problem seems to be related to your intentions. You have:

 Context ctx = this.getApplicationContext();

Usually, intentions are tied to activity contexts, not application contexts, so I would check this out.

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Source: https://habr.com/ru/post/1394841/

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