android - 5.1 Crash - A TaskDescription's primary color should be opaque

Question

I have implemented material design into my app and it runs perfectly fine on < Android 5 but when I try to run on Android 5.0 and above I get the following in my logcat.

     FATAL EXCEPTION main
 Process com.test.test, PID 3195
 java.lang.RuntimeException Unable to start activity ComponentInfo{com.test.test/com.test.test.MainActivity} java.lang.RuntimeException A TaskDescription's primary color should be opaque
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java2298)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java2360)
    at android.app.ActivityThread.access$800(ActivityThread.java144)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java1278)
    at android.os.Handler.dispatchMessage(Handler.java102)
    at android.os.Looper.loop(Looper.java135)
    at android.app.ActivityThread.main(ActivityThread.java5221)
    at java.lang.reflect.Method.invoke(Native Method)
    at java.lang.reflect.Method.invoke(Method.java372)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java899)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java694)
 Caused by java.lang.RuntimeException A TaskDescription's primary color should be opaque
    at android.app.ActivityManager$TaskDescription.<init>(ActivityManager.java536)
    at android.app.Activity.onApplyThemeResource(Activity.java3677)
    at android.view.ContextThemeWrapper.initializeTheme(ContextThemeWrapper.java140)
    at android.view.ContextThemeWrapper.setTheme(ContextThemeWrapper.java85)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java2244)
    ... 10 more

And here is my styles:

    <resources>

    <!--
        Base application theme, dependent on API level. This theme is replaced
        by AppBaseTheme from res/values-vXX/styles.xml on newer devices.


    -->


    <!-- All customizations that are NOT specific to a particular API-level can go here. -->

    <style name="AppTheme" parent="@style/Theme.AppCompat.NoActionBar">

        <!-- All customizations that are NOT specific to a particular API-level can go here. -->

        <item name="colorPrimaryDark">#4DFF9800</item>
        <item name="colorPrimary">#4D607D8B</item>
    </style>

</resources>

If anyone could give me some guidance that would be great thanks.

Answer 1

You can not use alfa in primary color. The primary color has to be opaque.

Change:

<item name="colorPrimaryDark">#4DFF9800</item>
<item name="colorPrimary">#4D607D8B</item>

To

<item name="colorPrimaryDark">#FF9800</item>
<item name="colorPrimary">#607D8B</item>

for api 21 in res/values-v21/style.xml file