关于sqlite数据库的错误，我该怎么解决呢，刚接触android开发

数据库测试类
public class BihuaServiceTest extends AndroidTestCase{
private static final String TAG="BihuaServiceTest";
public void testCreateDB()throws Throwable{
MyOpenHelper myopenhelper=new MyOpenHelper(this.getContext());
myopenhelper.getWritableDatabase();//第一次调用该方法就会创建数据库
}
public BihuaServiceTest(){}
//测试增加
public void testAdd()throws Throwable
{
BihuaService biHuaService=new BihuaService(this.getContext());

Bihua bihua=new Bihua();
bihua.setBiduan("横");
bihua.setBiduanxl("1");
bihua.setZimu("a");
biHuaService.Add(bihua);

bihua=new Bihua();
bihua.setBiduan("竖");
bihua.setBiduanxl("2");
bihua.setZimu("b");
biHuaService.Add(bihua);

bihua=new Bihua();
bihua.setBiduan("撇");
bihua.setBiduanxl("3");
bihua.setZimu("c");
biHuaService.Add(bihua);
}
public void testDelete()throws Throwable{
BihuaService bihuaService=new BihuaService(this.getContext());
bihuaService.Delete("撇");

}
//测试查询
public void testFind() throws Throwable
{
BihuaService bihuaService=new BihuaService(this.getContext());
String result=bihuaService.Find("1");
Log.i(TAG, result);
}
}
下面是MyOpenHelper类
public class MyOpenHelper extends SQLiteOpenHelper {

public static final String DBNAME="androidybhy.db";
public static final int VERSION=1;
public static final String CREATETB1="CREATE TABLE bihua (biduan string , biduanxl string ,zimu string)";
public static final String CREATETB2="CREATE TABLE Word (ziti string , bihuashumu string ,bihuaxulie string)";
public static final String CREATETB3="CREATE TABLE zib (zi string ,tz string ,bh int)";
public static final String CREATETB4="CREATE TABLE ziyinyi (zi string ,pinyin string ,ziyi string , yingyu string ,bihua string, bushou string,shuxing string)";
public MyOpenHelper(Context context) {
super(context, DBNAME, null, VERSION);
// TODO 自动生成的构造函数存根
}

@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL(CREATETB1);
db.execSQL(CREATETB2);
db.execSQL(CREATETB3);
db.execSQL(CREATETB4);

}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {


}

}

下面是activity里面的部分内容
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

Button button;
button=(Button)findViewById(R.id.testsqlite);
// button.setOnClickListener(new OnClickListener(){
// @Override
// public void onClick(View v) {
// //@SuppressWarnings("unused")
// BihuaServiceTest bihuaServiceTest=new BihuaServiceTest(this);
// }
// });
button.setOnClickListener(this);
}

@Override
public void onClick(View v) {
BihuaServiceTest bihuaServiceTest=new BihuaServiceTest();

}
出现如下异常
04-25 02:24:42.408: A/NetworkStats(79): problem reading network stats
04-25 02:24:42.408: A/NetworkStats(79): java.lang.IllegalStateException: problem parsing line: null
04-25 02:24:42.408: A/NetworkStats(79): at com.android.internal.net.NetworkStatsFactory.readNetworkStatsDetail(NetworkStatsFactory.java:313)
04-25 02:24:42.408: A/NetworkStats(79): at com.android.server.NetworkManagementService.getNetworkStatsUidDetail(NetworkManagementService.java:1271)
04-25 02:24:42.408: A/NetworkStats(79): at com.android.server.net.NetworkStatsService.performPollLocked(NetworkStatsService.java:810)
04-25 02:24:42.408: A/NetworkStats(79): at com.android.server.net.NetworkStatsService.updateIfacesLocked(NetworkStatsService.java:721)
04-25 02:24:42.408: A/NetworkStats(79): at com.android.server.net.NetworkStatsService.updateIfaces(NetworkStatsService.java:699)
04-25 02:24:42.408: A/NetworkStats(79): at com.android.server.net.NetworkStatsService.access$000(NetworkStatsService.java:128)
04-25 02:24:42.408: A/NetworkStats(79): at com.android.server.net.NetworkStatsService$1.onReceive(NetworkStatsService.java:589)
04-25 02:24:42.408: A/NetworkStats(79): at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:728)
04-25 02:24:42.408: A/NetworkStats(79): at android.os.Handler.handleCallback(Handler.java:605)
04-25 02:24:42.408: A/NetworkStats(79): at android.os.Handler.dispatchMessage(Handler.java:92)
04-25 02:24:42.408: A/NetworkStats(79): at android.os.Looper.loop(Looper.java:137)
04-25 02:24:42.408: A/NetworkStats(79): at android.os.HandlerThread.run(HandlerThread.java:60)
04-25 02:24:42.408: A/NetworkStats(79): Caused by: java.io.FileNotFoundException: /proc/net/xt_qtaguid/stats: open failed: ENOENT (No such file or directory)
04-25 02:24:42.408: A/NetworkStats(79): at libcore.io.IoBridge.open(IoBridge.java:406)
04-25 02:24:42.408: A/NetworkStats(79): at java.io.FileInputStream.<init>(FileInputStream.java:78)
04-25 02:24:42.408: A/NetworkStats(79): at java.io.FileReader.<init>(FileReader.java:42)
04-25 02:24:42.408: A/NetworkStats(79): at com.android.internal.net.NetworkStatsFactory.readNetworkStatsDetail(NetworkStatsFactory.java:272)
04-25 02:24:42.408: A/NetworkStats(79): ... 11 more
04-25 02:24:42.408: A/NetworkStats(79): Caused by: libcore.io.ErrnoException: open failed: ENOENT (No such file or directory)
04-25 02:24:42.408: A/NetworkStats(79): at libcore.io.Posix.open(Native Method)
04-25 02:24:42.408: A/NetworkStats(79): at libcore.io.BlockGuardOs.open(BlockGuardOs.java:98)
04-25 02:24:42.408: A/NetworkStats(79): at libcore.io.IoBridge.open(IoBridge.java:390)
04-25 02:24:42.408: A/NetworkStats(79): ... 14 more
04-25 02:24:49.177: E/DefaultVoicemailNotifier(319): No voicemails to notify about: clear the notification.