我有以下代码，在Android 5.0和6.0中可以正常运行，但如果我在Android 4.4设备上使用此应用程序，则应用程序会崩溃。请帮助我解决这个问题。 以下是我的代码
if (Build.VERSION.SDK_INT > 20) {
packageName = mActivityManager.getRunningAppProcesses().get(1).processName;
} else {
packageName = mActivityManager.getRunningTasks(1).get(0).topActivity.getPackageName();
}
Log.e("Package : ", "" + packageName);
错误显示如下：
E/AndroidRuntime: FATAL EXCEPTION: main Process: com.keyboardsample, PID: 23694 android.content.ActivityNotFoundException: 没有可处理该意图的活动 { act=android.intent.action.SEND typ=image/png flg=0x1 pkg=com.keyboardsample (has clip) (has extras) } at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1632) at android.app.Instrumentation.execStartActivity(Instrumentation.java:1424) at android.app.Activity.startActivityForResult(Activity.java:3424) at android.app.Activity.startActivityForResult(Activity.java:3385) at android.app.Activity.startActivity(Activity.java:3627) at android.app.Activity.startActivity(Activity.java:3595) at com.keyboardsample.PhotoActivity$1.onItemClick(PhotoActivity.java:80) at android.widget.AdapterView.performItemClick(AdapterView.java:299) at android.widget.AbsListView.performItemClick(AbsListView.java:1113) at android.widget.AbsListView$PerformClick.run(AbsListView.java:2911) at android.widget.AbsListView$3.run(AbsListView.java:3645) at android.os.Handler.handleCallback(Handler.java:733) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:136) at android.app.ActivityThread.main(ActivityThread.java:5001) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:515) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601) at dalvik.system.NativeStart.main(Native Method)