deleteDatabase NullPointerException異常

異常信息

03-28 22:02:01.255 23890-23926/com.sds.sdk E/AndroidRuntime: FATAL EXCEPTION: Thread-663

Process: com.sds.sdk, PID: 23890  java.lang.NullPointerException

at android.database.sqlite.SQLiteDatabase.deleteDatabase(SQLiteDatabase.java:762)

at com.sds.sdk.android.sh.internal.db.android.AndroidSqlite.<init>(AndroidSqlite.java:29)

at com.sds.sdk.android.sh.internal.db.DbManager.getMemDatabase(DbManager.java:27)

at com.sds.sdk.android.sh.internal.InternalDB.<init>(InternalDB.java:114)

at com.sds.sdk.android.sh.internal.InternalSHClient.<init>(InternalSHClient.java:177)

at com.sds.sdk.android.sh.SHClient.<init>(SHClient.java:158)

at com.sds.sdk.android.sh.SHClient.newInstance(SHClient.java:131)

at com.sds.sdk.MyApp$1.run(MyApp.java:52)

at java.lang.Thread.run(Thread.java:841)

android 環境配置

compileSdkVersion 25
buildToolsVersion "26.0.1"
defaultConfig {
    applicationId "com.sds.sdk"
    minSdkVersion 19
    targetSdkVersion 25
    versionCode 1
    versionName "1.0"
    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}