android - 以编程方式设置 "task affinity"

Question

有没有办法以编程方式设置“任务关联”？我的意思是像一些 Intent 标志或某事？我在 Android 文档中没有找到任何关于这可能的信息。

使用 android:taskAffinity 在 AndroidManifest.xml 中以静态方式设置亲和力不适合我的需要。

Answer 1

你不能。

taskAffinity 包含在 ActivityInfo 中，它是 Activity 的成员。

Source code of Activity

public class Activity extends ContextThemeWrapper
    ...
    ... {
    // set by the thread after the constructor and before 
    // onCreate(Bundle savedInstanceState) is called.

    @UnsupportedAppUsage
    /*package*/ ActivityInfo mActivityInfo;
 }

并且ActivityInfo有taskAffinity。

Source code of ActivityInfo

/**
 * Information you can retrieve about a particular application
 * activity or receiver. This corresponds to information collected
 * from the AndroidManifest.xml's <activity> and
 * <receiver> tags.
 */
public class ActivityInfo extends ComponentInfo implements Parcelable {

   /**
    * The affinity this activity has for another task in the system.  The
    * string here is the name of the task, often the package name of the
    * overall package.  If null, the activity has no affinity.  Set from the
    * {@link android.R.attr#taskAffinity} attribute.
    */
    public String taskAffinity;

根据源码的注释，taskAffinity的信息是从AndroidManifest.xml中收集的。并且没有设置 mActivityInfo.taskAffinity 的公共(public)方法。