android error java.lang.NoClassDefFoundError

Question

I have android app in market so I get this error but I don't know why.

Exception class java.lang.NoClassDefFoundError
Source method MainActivity.onCreate()

java.lang.NoClassDefFoundError: android.app.DownloadManager
at com.example.viewpagerexample.MainActivity.onCreate(MainActivity.java:182)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1069)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2751)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2803)
at android.app.ActivityThread.access$2300(ActivityThread.java:135)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2136)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:144)
at android.app.ActivityThread.main(ActivityThread.java:4937)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:521)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
at dalvik.system.NativeStart.main(Native Method)

nicopico · Accepted Answer · 2013-02-04 13:00:46Z

3

DownloadManager was added on API level 9 (aka Gingerbread). My guess you declared minSDK as lower than 9 in your AndroidManifest.xml

If that is the case, you need to devise a workaround for users using older Android version. You can check on which version your app is running by using the following code:

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.GINGERBREAD) {
    // Use DownloadManager
}
else {
    // Workaround
}

answered Feb 4, 2013 at 13:00

nicopico

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nicopico Over a year ago

You're welcome. Please consider accepting my answer if it was helpful to you.

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