Crash in AlertDialog builder when android support library updated to 24

问题

The code was working fine before, but when I updated support library to 24, It crashes when displaying alert dialog. Couldn't find any help as it is updated recently.

Code:

AlertDialog.Builder builderSingle;
builderSingle = new AlertDialog.Builder(mContext);
//set buttons and title code
builderSingle.show();

Logcat:

Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.v7.internal.widget.DialogTitle" on path: DexPathList[[zip file "/data/app/com.abc-2/base.apk"],nativeLibraryDirectories=[/data/app/com.abc-2/lib/arm, /data/app/com.abc-2/base.apk!/lib/armeabi-v7a, /vendor/lib, /system/lib]]
     at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
     at android.view.LayoutInflater.createView(LayoutInflater.java:583)
     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:764)
     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704) 
     at android.view.LayoutInflater.rInflate(LayoutInflater.java:835) 
     at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798) 
     at android.view.LayoutInflater.rInflate(LayoutInflater.java:838) 
     at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798) 
     at android.view.LayoutInflater.rInflate(LayoutInflater.java:838) 
     at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798) 
     at android.view.LayoutInflater.inflate(LayoutInflater.java:515) 
     at android.view.LayoutInflater.inflate(LayoutInflater.java:423) 
     at android.view.LayoutInflater.inflate(LayoutInflater.java:374) 
     at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:280) 
     at android.support.v7.app.AppCompatDialog.setContentView(AppCompatDialog.java:80) 
     at android.support.v7.app.AlertController.installContent(AlertController.java:214) 
     at android.support.v7.app.AlertDialog.onCreate(AlertDialog.java:257) 
     at android.app.Dialog.dispatchOnCreate(Dialog.java:394) 
     at android.app.Dialog.show(Dialog.java:295) 
     at android.support.v7.app.AlertDialog$Builder.show(AlertDialog.java:953) 
     at qi.mnav.search.fragments.RecentsFavouriteFragment.handleFavLongClick(RecentsFavouriteFragment.java:525) 
     at qi.mnav.search.fragments.RecentsFavouriteFragment.onItemLongClick(RecentsFavouriteFragment.java:353) 
     at android.widget.AbsListView.performLongPress(AbsListView.java:3134) 
     at android.widget.AbsListView$CheckForLongPress.run(AbsListView.java:3066) 
     at android.os.Handler.handleCallback(Handler.java:746) 
     at android.os.Handler.dispatchMessage(Handler.java:95) 
     at android.os.Looper.loop(Looper.java:148) 
     at android.app.ActivityThread.main(ActivityThread.java:5443) 
     at java.lang.reflect.Method.invoke(Native Method) 
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728) 
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 
    Suppressed: java.lang.ClassNotFoundException: android.support.v7.internal.widget.DialogTitle
     at java.lang.Class.classForName(Native Method)
     at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
     at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
            ... 31 more

And the support libraries are:

    compile('com.android.support:recyclerview-v7:24.0.0') {
        exclude group: 'com.android.support', module: 'support-v4'
    }
    compile('com.android.support:support-v4:24.0.0') {
        force = true
    }
    compile 'com.android.support:appcompat-v7:24.0.0'
    compile 'com.android.support:design:24.0.0'

回答1:

I think there is some problem with your imports.

The Exception :

java.lang.ClassNotFoundException: Didn't find class "android.support.v7.internal.widget.DialogTitle"

says it is unable to find DialogTitle but i am not seeing DialogTitle any where in your code.

So if you are having any import called android.support.v7.internal.widget.DialogTitle any where in your project then remove it.

You need to import this for your AlertDialog:

 import android.app.AlertDialog;

instead of this:

 import android.support.v7.app.AlertDialog; 

回答2:

Import this:

import android.app.AlertDialog;

来源：https://stackoverflow.com/questions/38308057/crash-in-alertdialog-builder-when-android-support-library-updated-to-24