Question

我已经完成了几乎Chromecast集成，但我需要在活动的选项菜单中添加自定义强制转换按钮。怎么做？？在菜单中添加自定义转换按钮作为项目时，我得到空指针异常。

我的代码部分是：

    public void onCreate(Bundle savedInstanceState) {

    mMediaRouter = MediaRouter.getInstance(getApplicationContext());
    mMediaRouteSelector = new MediaRouteSelector.Builder()
    .addControlCategory(CastMediaControlIntent.categoryForCast(APP_ID)).build();

    mMediaRouteButton = (MediaRouteButton) findViewById(R.id.media_route_button);
    mMediaRouterCallback = new MediaRouterCallback();
    mCastListener = new CastListener();
    mConnectionCallbacks = new ConnectionCallbacks();
    mConnectionFailedListener = new ConnectionFailedListener();

    // Set the MediaRouteButton selector for device discovery.
    mMediaRouteButton.setRouteSelector(mMediaRouteSelector);

}

    <?xml version="1.0" encoding="utf-8"?>
    <menu xmlns:android="http://schemas.android.com/apk/res/android">
          <item android:id="@+id/share"
            android:title="Share"
            android:icon="@drawable/ic_menu_share" />

           <item android:id="@+id/feedback"
            android:title="Feedback"
            android:icon="@drawable/ic_menu_feedback" />

            <item android:id="@+id/quit"
            android:title="Quit"
            android:icon="@drawable/ic_menu_close_clear_cancel" />

            <android.support.v7.app.MediaRouteButton
            android:id="@+id/media_route_button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:mediaRouteTypes="user"
            android:visibility="gone" />
           </menu>

Answer 1

对于MediaRouteButton，您的活动需要扩展FragmentActivity

如何在android for chromecast的选项菜单中添加自定义强制转换按钮？

1 个答案: