我正在使用第三方库,有一种方法使用DrawableCompat.setTintMode(drawable, PorterDuff.Mode.SRC_IN);.当我在Android 5.0 +中测试我的应用程序时,没有问题并且运行良好.但是当它涉及到android 4.4.4时,它引发了一个异常:
05-09 13:15:15.030 26447-26447/com.wizchen.athit E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.wizchen.athit, PID: 26447
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.wizchen.athit/com.wizchen.athit.view.activity.MainActivity}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2271)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2320)
at android.app.ActivityThread.access$800(ActivityThread.java:138)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1269)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5117)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at android.support.v4.graphics.drawable.DrawableWrapperDonut.setCompatTintMode(DrawableWrapperDonut.java:278)
at android.support.v4.graphics.drawable.DrawableCompatBase.setTintMode(DrawableCompatBase.java:48)
at android.support.v4.graphics.drawable.DrawableCompat$BaseDrawableImpl.setTintMode(DrawableCompat.java:99)
at android.support.v4.graphics.drawable.DrawableCompat.setTintMode(DrawableCompat.java:400)
at com.wizchen.athit.lib.AppThemeEngine.util.TintHelper.createTintedDrawable(TintHelper.java:359)
at com.wizchen.athit.lib.AppThemeEngine.viewprocessors.ToolbarProcessor.process(ToolbarProcessor.java:117)
at com.wizchen.athit.lib.AppThemeEngine.viewprocessors.ToolbarProcessor.process(ToolbarProcessor.java:44)
at com.wizchen.athit.lib.AppThemeEngine.ATE.postApply(ATE.java:209)
at com.wizchen.athit.lib.AppThemeEngine.ATEActivity.onStart(ATEActivity.java:60)
at com.wizchen.athit.view.activity.MainActivity.onStart(MainActivity.java:68)
at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1183)
at android.app.Activity.performStart(Activity.java:5359)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2244) …在我的项目中,我使用OkHttp(版本2.5.0)作为我的网络请求库.但前几天,我尝试Retrofit2作为我的应用程序的网络请求库的一部分,你也知道,在OkHttp(3.2.0版本)的新Retrofit2库的依赖.所以来这里的问题是,当我的应用程序的Android手机,其安卓上运行android 5.0下的版本总是导致崩溃(较大版本运行良好并且不会导致崩溃),崩溃堆栈信息如下所示:
04-15 21:28:51.185 17238-17238/com.comingx.athit W/System.err: java.lang.NoClassDefFoundError: okhttp3.OkHttpClient$Builder
04-15 21:28:51.185 17238-17238/com.comingx.athit W/System.err: at com.comingx.athit.client.ServiceGenerator.<clinit>(ServiceGenerator.java:22)
04-15 21:28:51.185 17238-17238/com.comingx.athit W/System.err: at com.comingx.athit.ui.fragments.CircleNativeFragment.onViewCreated(CircleNativeFragment.java:105)
04-15 21:28:51.185 17238-17238/com.comingx.athit W/System.err: at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1086)
04-15 21:28:51.185 17238-17238/com.comingx.athit W/System.err: at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1252)
04-15 21:28:51.185 17238-17238/com.comingx.athit W/System.err: at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:742)
04-15 21:28:51.185 17238-17238/com.comingx.athit W/System.err: at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1617)
04-15 21:28:51.185 17238-17238/com.comingx.athit W/System.err: at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:517)
04-15 21:28:51.185 17238-17238/com.comingx.athit W/System.err: at android.os.Handler.handleCallback(Handler.java:808)
04-15 21:28:51.185 17238-17238/com.comingx.athit W/System.err: at android.os.Handler.dispatchMessage(Handler.java:103)
04-15 21:28:51.185 17238-17238/com.comingx.athit W/System.err: at android.os.Looper.loop(Looper.java:193)
04-15 21:28:51.185 17238-17238/com.comingx.athit W/System.err: at android.app.ActivityThread.main(ActivityThread.java:5348)
04-15 21:28:51.185 17238-17238/com.comingx.athit W/System.err: at java.lang.reflect.Method.invokeNative(Native …