小编Tha*_*han的帖子

我BitmapDescriptor在创建MarkerOptions使用VectorDrawableAPI 5.0+的图标时遇到谷歌地图问题

用于创建的方法:

@NonNull
private BitmapDescriptor getBitmapDescriptor(int id) {
    return BitmapDescriptorFactory.fromResource(id);
}

当id参数包含png drawable时,一切都很好,但是如果我VectorDrawable在xml中定义它,那么当googleMap.addMarker(marker)(BitmapDescriptor不是null)时,App总会崩溃.

11-05 10:15:05.213 14536-14536/xxx.xxxxx.app E/AndroidRuntime: FATAL EXCEPTION: main
    Process: xxx.xxxxx.app, PID: 14536
    java.lang.NullPointerException
        at com.google.a.a.ae.a(Unknown Source)
        at com.google.maps.api.android.lib6.d.dn.<init>(Unknown Source)
        at com.google.maps.api.android.lib6.d.dm.a(Unknown Source)
        at com.google.maps.api.android.lib6.d.ag.<init>(Unknown Source)
        at com.google.maps.api.android.lib6.d.eu.a(Unknown Source)
        at com.google.android.gms.maps.internal.j.onTransact(SourceFile:167)
        at android.os.Binder.transact(Binder.java:380)
        at com.google.android.gms.maps.internal.IGoogleMapDelegate$zza$zza.addMarker(Unknown Source)
        at com.google.android.gms.maps.GoogleMap.addMarker(Unknown Source)
        at xxx.xxxxx.app.ui.details.DetailActivity.lambda$initGoogleMaps$23(DetailActivity.java:387)
        at xxx.xxxxx.app.ui.details.DetailActivity.access$lambda$10(DetailActivity.java)
        at xxx.xxxxx.app.ui.details.DetailActivity$$Lambda$13.onMapReady(Unknown Source)
        at com.google.android.gms.maps.SupportMapFragment$zza$1.zza(Unknown Source)
        at com.google.android.gms.maps.internal.zzl$zza.onTransact(Unknown Source)
        at android.os.Binder.transact(Binder.java:380) …

在Android Studio 2.3中,没有允许用户在Edit configuration窗口中设置其他测试运行器参数的字段Android Instrumented Tests,但是此选项在2.2.x版本中存在.

新AS中是否还有其他方法(从命令行手动运行测试除外)为espresso测试添加额外的转轮参数？

编辑:

我在bug跟踪器上填写了一个问题:

https://code.google.com/p/android/issues/detail?id=231797&q=instrumentation&sort=-opened&colspec=ID%20Status%20Priority%20Owner%20Summary%20Stars%20Reporter%20Opened

我有Coach一个具有ScheduleEntity对象集合的类;

public class Coach{

    @ForeignCollectionField(columnName = FIELD_SCHEDULE_ENTITY)
    private Collection<ScheduleEntity> scheduleEntities;
}

[...]

public class ScheduleEntity {

    @DatabaseField(columnName = FIELD_COACH, foreign = true)
    private Coach coach;
}

我想先找回ScheduleEntity教练.

当我这样做时使用QueryBuilder:

public ScheduleEntity getFirstScheduleForCoach(Coach coach) throws SQLException {
    QueryBuilder<ScheduleEntity, Long> queryBuilder = scheduleEntityDao.queryBuilder();
    queryBuilder
            .where()
            .eq(ScheduleEntity.FIELD_COACH, coach);
   return scheduleEntityDao.queryForFirst(queryBuilder.prepare());

一些奇怪的信息出现在logcat中:

Close cursor android.database.sqlite.SQLiteCursor@42321aa0 on null twice or more

但是,当我以另一种方式这样做时:

return scheduleEntityDao.queryForEq(ScheduleEntity.FIELD_COACH, coach).iterator().next();

一切都很好(不关心可能的nullpointer).

这些信息意味着什么？我做错了什么还是正常行为？

假设我们有这样的结构:

JSON:

{
  "body": {
    "cats": [
      {
        "cat": {
          "id": 1,
          "title": "cat1"
        }
      },
      {
        "cat": {
          "id": 2,
          "title": "cat2"
        }
      }
    ]
  }
}

和相应的POJO:

Response.class

private final Body body;

Body.class

private final Collection<CatWrapper> cats

CatWrapper.class

private final Cat cat

Cat.class

private final int id;
private final String title;

但是,现在我们说我们有相同的结构,但不是Cat我们收到的truck

{
  "body": {
    "trucks": [
      {
        "truck": {
          "id": 1,
          "engine": "big",
          "wheels": 12
        }
      },
      {
        "truck": {
          "id": 2,
          "engine": "super …