Develop Reference

Class cannot be cast to android.app.Fragment on FragmentActivity

I'm getting the following error trying to start an activity with a Fragment
08-09 13:50:57.070: ERROR/AndroidRuntime(1446): FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity ComponentInfo{br.com.zap.imoveis/br.com.zap.imoveis.ui.ResultadoBusca}: android.view.InflateException: Binary XML file line #8: Error inflating class fragment
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
at android.app.ActivityThread.access$600(ActivityThread.java:130)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4745)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
Caused by: android.view.InflateException: Binary XML file line #8: Error inflating class fragment
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:256)
at com.actionbarsherlock.internal.ActionBarSherlockNative.setContentView(ActionBarSherlockNative.java:133)
at com.actionbarsherlock.app.SherlockFragmentActivity.setContentView(SherlockFragmentActivity.java:261)
at br.com.zap.imoveis.ui.ResultadoBusca.onCreate(ResultadoBusca.java:54)
at android.app.Activity.performCreate(Activity.java:5008)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
... 11 more
Caused by: java.lang.ClassCastException: br.com.zap.imoveis.ui.ResultadoBuscaMapa cannot be cast to android.app.Fragment
at android.app.Fragment.instantiate(Fragment.java:577)
at android.app.Fragment.instantiate(Fragment.java:552)
at android.app.Activity.onCreateView(Activity.java:4656)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:680)
... 22 more
Despite of what it says here:
Cannot be cast to android.app.Fragment
I have this error even though my Activity extends from android.support.v4.app.FragmentActivity

Unfortunately, error messages some times are very misleading. I've almost rebuilt my application to find out that during a refactor I have accidentally deleted this line o code
super.onCreate(savedInstanceState);
on the onCreate method of my activity.

Exception "inflating class fragment"

Getting run time exception as "inflating class fragment" when I tried to add Google map in my android application. I go through all the previous comments similar to which I have posted. But I couldn't solve it.
Log file is attached here
08-07 05:30:41.587: E/AndroidRuntime(2574): FATAL EXCEPTION: main
08-07 05:30:41.587: E/AndroidRuntime(2574): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.newapp/com.example.newapp.NewApp}: android.view.InflateException: Binary XML file line #17: Error inflating class fragment
08-07 05:30:41.587: E/AndroidRuntime(2574): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
08-07 05:30:41.587: E/AndroidRuntime(2574): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
08-07 05:30:41.587: E/AndroidRuntime(2574): at android.app.ActivityThread.access$600(ActivityThread.java:141)
08-07 05:30:41.587: E/AndroidRuntime(2574): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
08-07 05:30:41.587: E/AndroidRuntime(2574): at android.os.Handler.dispatchMessage(Handler.java:99)
08-07 05:30:41.587: E/AndroidRuntime(2574): at android.os.Looper.loop(Looper.java:137)
08-07 05:30:41.587: E/AndroidRuntime(2574): at android.app.ActivityThread.main(ActivityThread.java:5103)
08-07 05:30:41.587: E/AndroidRuntime(2574): at java.lang.reflect.Method.invokeNative(Native Method)
08-07 05:30:41.587: E/AndroidRuntime(2574): at java.lang.reflect.Method.invoke(Method.java:525)
08-07 05:30:41.587: E/AndroidRuntime(2574): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
08-07 05:30:41.587: E/AndroidRuntime(2574): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
08-07 05:30:41.587: E/AndroidRuntime(2574): at dalvik.system.NativeStart.main(Native Method)
08-07 05:30:41.587: E/AndroidRuntime(2574): Caused by: android.view.InflateException: Binary XML file line #17: Error inflating class fragment
08-07 05:30:41.587: E/AndroidRuntime(2574): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:713)
08-07 05:30:41.587: E/AndroidRuntime(2574): at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
08-07 05:30:41.587: E/AndroidRuntime(2574): at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
08-07 05:30:41.587: E/AndroidRuntime(2574): at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
08-07 05:30:41.587: E/AndroidRuntime(2574): at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
08-07 05:30:41.587: E/AndroidRuntime(2574): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:267)
08-07 05:30:41.587: E/AndroidRuntime(2574): at android.app.Activity.setContentView(Activity.java:1895)
08-07 05:30:41.587: E/AndroidRuntime(2574): at com.example.newapp.NewApp.onCreate(NewApp.java:12)
08-07 05:30:41.587: E/AndroidRuntime(2574): at android.app.Activity.performCreate(Activity.java:5133)
08-07 05:30:41.587: E/AndroidRuntime(2574): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
08-07 05:30:41.587: E/AndroidRuntime(2574): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
08-07 05:30:41.587: E/AndroidRuntime(2574): ... 11 more
08-07 05:30:41.587: E/AndroidRuntime(2574): Caused by: android.support.v4.app.Fragment$InstantiationException: Unable to instantiate fragment com.google.android.gms.maps.SupportMapFragment: make sure class name exists, is public, and has an empty constructor that is public
08-07 05:30:41.587: E/AndroidRuntime(2574): at android.support.v4.app.Fragment.instantiate(Fragment.java:409)
08-07 05:30:41.587: E/AndroidRuntime(2574): at android.support.v4.app.Fragment.instantiate(Fragment.java:377)
08-07 05:30:41.587: E/AndroidRuntime(2574): at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:277)
08-07 05:30:41.587: E/AndroidRuntime(2574): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:685)
08-07 05:30:41.587: E/AndroidRuntime(2574): ... 21 more
08-07 05:30:41.587: E/AndroidRuntime(2574): Caused by: java.lang.ClassNotFoundException: Didn't find class "com.google.android.gms.maps.SupportMapFragment" on path: DexPathList[[zip file "/data/app/com.example.newapp-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.example.newapp-1, /vendor/lib, /system/lib]]
08-07 05:30:41.587: E/AndroidRuntime(2574): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:53)
08-07 05:30:41.587: E/AndroidRuntime(2574): at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
08-07 05:30:41.587: E/AndroidRuntime(2574): at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
08-07 05:30:41.587: E/AndroidRuntime(2574): at android.support.v4.app.Fragment.instantiate(Fragment.java:399)
08-07 05:30:41.587: E/AndroidRuntime(2574): ... 24 more
08-07 05:30:47.677: I/Process(2574): Sending signal. PID: 2574 SIG: 9
08-07 05:30:53.767: D/AndroidRuntime(2650): Shutting down VM
08-07 05:30:53.767: W/dalvikvm(2650): threadid=1: thread exiting with uncaught exception (group=0x414c4700)
08-07 05:30:53.857: E/AndroidRuntime(2650): FATAL EXCEPTION: main
08-07 05:30:53.857: E/AndroidRuntime(2650): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.newapp/com.example.newapp.NewApp}: android.view.InflateException: Binary XML file line #17: Error inflating class fragment
08-07 05:30:53.857: E/AndroidRuntime(2650): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
08-07 05:30:53.857: E/AndroidRuntime(2650): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
08-07 05:30:53.857: E/AndroidRuntime(2650): at android.app.ActivityThread.access$600(ActivityThread.java:141)
08-07 05:30:53.857: E/AndroidRuntime(2650): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
08-07 05:30:53.857: E/AndroidRuntime(2650): at android.os.Handler.dispatchMessage(Handler.java:99)
08-07 05:30:53.857: E/AndroidRuntime(2650): at android.os.Looper.loop(Looper.java:137)
08-07 05:30:53.857: E/AndroidRuntime(2650): at android.app.ActivityThread.main(ActivityThread.java:5103)
08-07 05:30:53.857: E/AndroidRuntime(2650): at java.lang.reflect.Method.invokeNative(Native Method)
08-07 05:30:53.857: E/AndroidRuntime(2650): at java.lang.reflect.Method.invoke(Method.java:525)
08-07 05:30:53.857: E/AndroidRuntime(2650): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
08-07 05:30:53.857: E/AndroidRuntime(2650): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
08-07 05:30:53.857: E/AndroidRuntime(2650): at dalvik.system.NativeStart.main(Native Method)
08-07 05:30:53.857: E/AndroidRuntime(2650): Caused by: android.view.InflateException: Binary XML file line #17: Error inflating class fragment
08-07 05:30:53.857: E/AndroidRuntime(2650): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:713)
08-07 05:30:53.857: E/AndroidRuntime(2650): at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
08-07 05:30:53.857: E/AndroidRuntime(2650): at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
08-07 05:30:53.857: E/AndroidRuntime(2650): at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
08-07 05:30:53.857: E/AndroidRuntime(2650): at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
08-07 05:30:53.857: E/AndroidRuntime(2650): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:267)
08-07 05:30:53.857: E/AndroidRuntime(2650): at android.app.Activity.setContentView(Activity.java:1895)
08-07 05:30:53.857: E/AndroidRuntime(2650): at com.example.newapp.NewApp.onCreate(NewApp.java:12)
08-07 05:30:53.857: E/AndroidRuntime(2650): at android.app.Activity.performCreate(Activity.java:5133)
08-07 05:30:53.857: E/AndroidRuntime(2650): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
08-07 05:30:53.857: E/AndroidRuntime(2650): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
08-07 05:30:53.857: E/AndroidRuntime(2650): ... 11 more
08-07 05:30:53.857: E/AndroidRuntime(2650): Caused by: android.support.v4.app.Fragment$InstantiationException: Unable to instantiate fragment com.google.android.gms.maps.SupportMapFragment: make sure class name exists, is public, and has an empty constructor that is public
08-07 05:30:53.857: E/AndroidRuntime(2650): at android.support.v4.app.Fragment.instantiate(Fragment.java:409)
08-07 05:30:53.857: E/AndroidRuntime(2650): at android.support.v4.app.Fragment.instantiate(Fragment.java:377)
08-07 05:30:53.857: E/AndroidRuntime(2650): at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:277)
08-07 05:30:53.857: E/AndroidRuntime(2650): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:685)
08-07 05:30:53.857: E/AndroidRuntime(2650): ... 21 more
08-07 05:30:53.857: E/AndroidRuntime(2650): Caused by: java.lang.ClassNotFoundException: Didn't find class "com.google.android.gms.maps.SupportMapFragment" on path: DexPathList[[zip file "/data/app/com.example.newapp-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.example.newapp-1, /vendor/lib, /system/lib]]
08-07 05:30:53.857: E/AndroidRuntime(2650): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:53)
08-07 05:30:53.857: E/AndroidRuntime(2650): at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
08-07 05:30:53.857: E/AndroidRuntime(2650): at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
08-07 05:30:53.857: E/AndroidRuntime(2650): at android.support.v4.app.Fragment.instantiate(Fragment.java:399)
08-07 05:30:53.857: E/AndroidRuntime(2650): ... 24 more
08-07 05:30:56.837: I/Process(2650): Sending signal. PID: 2650 SIG: 9
manifest.xml file
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.newapp"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="18" />
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="********************************" />
<permission
android:name="com.venky.maps.permission.MAPS_RECEIVE"
android:protectionLevel="signature" />
<uses-permission android:name="com.example.newapp.maps.permission.MAPS_RECEIVE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-feature
android:glEsVersion="0x00020000"
android:required="true" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.example.newapp.NewApp"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
and the java file NewApp.java
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.view.Menu;
public class NewApp extends FragmentActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_new_app);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.new_app, menu);
return true;
}
}
activity_new_app.xml
<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=".NewApp" >
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/hello_world" />
<fragment
android:id="#+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent" />
Please help me to solve this problem.

One visible mistake
https://developers.google.com/maps/documentation/android/start
Your meta tag must be a child of application tag in manifest
<meta-data // should be inside application tag.
android:name="com.google.android.maps.v2.API_KEY"
android:value="********************************" />
Change this
<permission
android:name="com.venky.maps.permission.MAPS_RECEIVE"
android:protectionLevel="signature" />
to
<permission
android:name="com.example.newapp.permission.MAPS_RECEIVE"
android:protectionLevel="signature" />

Open Web Browser from App - Always Crashes

I'm trying to open a web browser from my app using:
Intent browser = new Intent(Intent.ACTION_VIEW, Uri.parse("http://developer.android.com/"));
startActivity(browser);
But the app just crashes:
08-07 17:18:29.912: E/AndroidRuntime(751): FATAL EXCEPTION: main
08-07 17:18:29.912: E/AndroidRuntime(751): java.lang.NullPointerException
08-07 17:18:29.912: E/AndroidRuntime(751): at android.app.Activity.startActivityForResult(Activity.java:3131)
08-07 17:18:29.912: E/AndroidRuntime(751): at android.app.Activity.startActivity(Activity.java:3237)
08-07 17:18:29.912: E/AndroidRuntime(751): at com.Co.DrumKit$9.onClick(DrumKit.java:658)
08-07 17:18:29.912: E/AndroidRuntime(751): at android.view.View.performClick(View.java:3110)
08-07 17:18:29.912: E/AndroidRuntime(751): at android.view.View$PerformClick.run(View.java:11934)
08-07 17:18:29.912: E/AndroidRuntime(751): at android.os.Handler.handleCallback(Handler.java:587)
08-07 17:18:29.912: E/AndroidRuntime(751): at android.os.Handler.dispatchMessage(Handler.java:92)
08-07 17:18:29.912: E/AndroidRuntime(751): at android.os.Looper.loop(Looper.java:132)
08-07 17:18:29.912: E/AndroidRuntime(751): at android.app.ActivityThread.main(ActivityThread.java:4123)
08-07 17:18:29.912: E/AndroidRuntime(751): at java.lang.reflect.Method.invokeNative(Native Method)
08-07 17:18:29.912: E/AndroidRuntime(751): at java.lang.reflect.Method.invoke(Method.java:491)
08-07 17:18:29.912: E/AndroidRuntime(751): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
08-07 17:18:29.912: E/AndroidRuntime(751): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
08-07 17:18:29.912: E/AndroidRuntime(751): at dalvik.system.NativeStart.main(Native Method)

Android WebView OutOfMemory?

Sometimes by starting my activity which only contains a WebView I got this strange log from LogCat:
java.lang.RuntimeException: Unable to start activity ComponentInfo{de.cb.pwapp/de.cb.pwapp.Artikel}:
android.view.InflateException: Binary XML file line #9: Error inflating class android.webkit.WebView
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2110)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2135)
at android.app.ActivityThread.access$700(ActivityThread.java:140)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1237)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4921)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1027)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:794)
at dalvik.system.NativeStart.main(Native Method)
Caused by: android.view.InflateException: Binary XML file line #9: Error inflating class android.webkit.WebView
at android.view.LayoutInflater.createView(LayoutInflater.java:613)
at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:660)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:685)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:313)
at android.app.Activity.setContentView(Activity.java:1924)
at de.cb.pwapp.Artikel.onCreate(Artikel.java:26)
at android.app.Activity.performCreate(Activity.java:5206)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2074)
... 11 more
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.constructNative(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:417)
at android.view.LayoutInflater.createView(LayoutInflater.java:587)
... 24 more
Caused by: java.lang.OutOfMemoryError
at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:625)
at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:478)
at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:781)
at android.content.res.Resources.loadDrawable(Resources.java:1963)
at android.content.res.TypedArray.getDrawable(TypedArray.java:601)
at android.view.View.<init>(View.java:3449)
at android.view.ViewGroup.<init>(ViewGroup.java:432)
at android.widget.AbsoluteLayout.<init>(AbsoluteLayout.java:52)
at android.webkit.WebView.<init>(WebView.java:505)
at android.webkit.WebView.<init>(WebView.java:482)
at android.webkit.WebView.<init>(WebView.java:468)
at android.webkit.WebView.<init>(WebView.java:457)
Is it correct that my WebView runs out of memory ?
I load the WebView with a long string, representing an article, from my SQLite DB.
Any ideas how to fix this problem ?

High Res Pics as a Background was the Problem

findViewById in activity issue

I'm using ActionBarSherlock and customized style for it:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:gravity="center"
android:textColor="#color/grey"
android:id="#+id/bar_title"
style="#style/Text.Medium">
</TextView>
</LinearLayout>
View mActionBarView = getLayoutInflater().inflate(R.layout.action_bar_custom, null);
getSupportActionBar().setCustomView(mActionBarView);
getSupportActionBar().setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM | ActionBar.DISPLAY_USE_LOGO | ActionBar.DISPLAY_SHOW_HOME);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
In my activity I am overriding setTitle method:
#Override
public void setTitle(CharSequence title) {
TextView txt = (TextView) findViewById(R.id.bar_title);
txt.setText(title);
}
But when in fragment I call getActivity().setTitle(), variable txt in overrided setTitle equals to null.
What's the problem?
Log:
09-06 18:18:21.807: ERROR/AndroidRuntime(953): FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.alwx.reader/com.alwx.reader.activity.BookActivity}: android.view.InflateException: Binary XML file line #10: Error inflating class fragment
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
at android.app.ActivityThread.access$600(ActivityThread.java:130)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4745)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
Caused by: android.view.InflateException: Binary XML file line #10: Error inflating class fragment
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:256)
at com.actionbarsherlock.internal.ActionBarSherlockNative.setContentView(ActionBarSherlockNative.java:119)
at com.actionbarsherlock.app.SherlockFragmentActivity.setContentView(SherlockFragmentActivity.java:251)
at com.alwx.reader.activity.BookActivity.onCreate(BookActivity.java:19)
at android.app.Activity.performCreate(Activity.java:5008)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
... 11 more
Caused by: java.lang.NullPointerException
at com.alwx.reader.activity.BookActivity.setTitle(BookActivity.java:28)
at com.alwx.reader.fragment.BookFragment.onCreateView(BookFragment.java:52)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:846)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1061)
at android.support.v4.app.FragmentManagerImpl.addFragment(FragmentManager.java:1160)
at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:272)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:676)
... 22 more

//this will work
TextView txt = (TextView)mActionBarView. findViewById(R.id.bar_title);
txt.setText(title);
//there is no default style as Text.Medium. you are created change it
style="#android:style/TextAppearance.Medium"