java.lang.ClassCastException: java.util.HashMap cannot be cast to java.util.Collection

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java.lang.ClassCastException: java.util.HashMap cannot be cast to java.util.Collection
at com.sextech.noui.ListViewAdapter.filter(ListViewAdapter.java:154)
at com.sextech.noui.MainActivity$DownloadJSON$1.afterTextChanged(MainActivity.java:230)
at android.widget.TextView.sendAfterTextChanged(TextView.java:7822)
at android.widget.TextView$ChangeWatcher.afterTextChanged(TextView.java:9635)
at android.text.SpannableStringBuilder.sendAfterTextChanged(SpannableStringBuilder.java:976)
at android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:520)
at android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:454)
at android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:33)
at android.view.inputmethod.BaseInputConnection.replaceText(BaseInputConnection.java:690)
at com.android.internal.view.IInputConnectionWrapper.executeMessage(IInputConnectionWrapper.java:349)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5593)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:960)

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