a.java 文件源码

/**
 * Special version of starting an activity, for use when you are replacing
 * other activity components.  You can use this to hand the Intent off
 * to the next Activity that can handle it.  You typically call this in
 * {@link #onCreate} with the Intent returned by {@link #getIntent}.
 *
 * @param intent The intent to dispatch to the next activity.  For
 * correct behavior, this must be the same as the Intent that started
 * your own activity; the only changes you can make are to the extras
 * inside of it.
 * @param options Additional options for how the Activity should be started.
 * See {@link android.content.Context#startActivity(Intent, Bundle)
 * Context.startActivity(Intent, Bundle)} for more details.
 *
 * @return Returns a boolean indicating whether there was another Activity
 * to start: true if there was a next activity to start, false if there
 * wasn't.  In general, if true is returned you will then want to call
 * finish() on yourself.
 */
public boolean startNextMatchingActivity(@RequiresPermission @NonNull Intent intent,
                                         @Nullable Bundle options) {
    if (mParent == null) {
        try {
            intent.migrateExtraStreamToClipData();
            intent.prepareToLeaveProcess(this);
            return ActivityManagerNative.getDefault()
                    .startNextMatchingActivity(mToken, intent, options);
        } catch (RemoteException e) {
            // Empty
        }
        return false;
    }

    throw new UnsupportedOperationException(
            "startNextMatchingActivity can only be called from a top-level activity");
}