Google Cast SDK3 Android示例应用程序在低于5.0的设备上崩溃

最新的Cast SDK进行了更改，使其与旧版本的Google Play服务不兼容(崩溃). 不幸的是，当使用最新的Cast SDK和过时的GPS(或在模拟器上)时，甚至Cast示例应用程序也会崩溃. 该问题已在此处进行了讨论: https://github.com/googlecast/CastVideos-android /issues/12

There was a change in the latest Cast SDK that made it incompatible (crashing) with older versions of Google Play Services. Unfortunately, even cast sample app crashes when using latest Cast SDK with outdated GPS (or on emulators). The issue has been discussed here: https://github.com/googlecast/CastVideos-android/issues/12

解决方案是在初始化包括小型控制器在内的所有演员表组件之前检查Google Play服务版本(即，您不能只是将小型控制器片段放入xml布局文件中-您必须动态地对其进行膨胀，或者具有两个布局文件-一个带有迷你控制器的文件，另一个带有不带迷你控制器的文件.

The solution is to check Google Play Services version before initialising any cast components, including mini controller (i.e. you can't just put mini controller fragment into your xml layout file - you either have to inflate it dynamically, or have two layout files - one with, and one without your mini controller).

检查GPS版本的代码:

Code to check GPS version:

GoogleApiAvailability apiAvailability = GoogleApiAvailability.getInstance();
int resultCode = apiAvailability.isGooglePlayServicesAvailable(context);
isGPSAvailable = (resultCode == ConnectionResult.SUCCESS);

如果结果不是ConnectionResult.SUCCESS，请不要初始化您的MiniControllerFragment，也不要访问CastContext.

If the results is not ConnectionResult.SUCCESS, don't initialise your MiniControllerFragment and do not access CastContext.

此外，请记住，不可能使用new MiniControllerFragment()实例化MiniControllerFragment.您必须从xml对其进行充气，否则将得到NullPointerException.

Also, please keep in mind that it is not possible to instantiate MiniControllerFragment using new MiniControllerFragment(). You have to inflate it from xml or you will get NullPointerException.

有两种方法可以充气MiniControllerFragment:

1. 创建单独的xml布局文件，并在Activity.onCreate中充入适当的文件:

setContentView(isGPSAvailable ? R.layout.activity_main_with_controller : R.layout.activity_main_without_controller);

<ViewStub
android:id="@+id/cast_minicontroller"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout="@layout/cast_mini_controller_fragment"
/>

<?xml version="1.0" encoding="utf-8"?>
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
          android:id="@+id/castMiniController"
          class="com.google.android.gms.cast.framework.media.widget.MiniControllerFragment"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:visibility="gone"/>

ViewStub miniControllerStub = (ViewStub) findViewById(R.id.cast_minicontroller);
if (isGPSAvailable) {
    miniControllerStub.inflate();
}