这是我的LogCat错误消息
01-26 15:06:44.996 6571-6571/com.rnhb.vishwas.sw E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.rnhb.vishwas.sw, PID: 6571
java.lang.NullPointerException: Attempt to invoke virtual method 'com.rnhb.vishwas.sw.OrgModel com.rnhb.vishwas.sw.DBAdapter.getOrg(java.lang.String)' on a null object reference
at com.rnhb.vishwas.sw.OneFragment.onActivityCreated(OneFragment.java:27)
at android.support.v4.app.Fragment.performActivityCreated(Fragment.java:1797)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:979)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1138)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:740)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1501)
at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:490)
at android.support.v4.app.FragmentStatePagerAdapter.finishUpdate(FragmentStatePagerAdapter.java:163)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1105)
at android.support.v4.view.ViewPager.populate(ViewPager.java:951)
at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1473)
at android.view.View.measure(View.java:17547)
at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:727)
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:463)
at android.view.View.measure(View.java:17547)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5535)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:436)
at android.support.v7.internal.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:124)
at android.view.View.measure(View.java:17547)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5535)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:722)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:613)
at android.view.View.measure(View.java:17547)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5535)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:436)
at android.view.View.measure(View.java:17547)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5535)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:722)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:613)
at android.view.View.measure(View.java:17547)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5535)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:436)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2615)
at android.view.View.measure(View.java:17547)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2015)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1173)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1379)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1061)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5885)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767)
at android.view.Choreographer.doCallbacks(Choreographer.java:580)
at android.view.Choreographer.doFrame(Choreographer.java:550)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5257)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
这是DBAdapter Class
上的方法public OrgModel getOrg(String EmailId) {
db = dbHelper.getReadableDatabase();
String selectQuery = "SELECT * FROM ORG_TB WHERE EMAIL='" + EmailId + "' ";
Cursor cursor = db.rawQuery(selectQuery, null);
if (cursor != null)
cursor.moveToFirst();
OrgModel orgModel = new OrgModel();
orgModel.setFull_Name(cursor.getString(1));
orgModel.setEmail(cursor.getString(2));
orgModel.setPassword(cursor.getString(3));
orgModel.setLocation(cursor.getString(4));
orgModel.setContact(cursor.getString(5));
return orgModel;
}
我正在尝试从片段中获取值，代码是
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
SharedPreferences pref = getActivity().getApplicationContext().getSharedPreferences("MyPref", 0);
String Email=pref.getString("EMAIL_ID", null);
Log.d("Email is:", Email);
OrgModel mymod =dbAdapter.getOrg(Email);
String pass=mymod.getPassword().toString();
Log.d("Password is",pass);
}
这是一个OrgModel类
public class OrgModel {
String Email;
String Password;
String Contact;
String Location;
String Full_Name;
public String getEmail() {
return Email;
}
public void setEmail(String email) {
Email = email;
}
public String getPassword() {
return Password;
}
public void setPassword(String password) {
Password = password;
}
public String getContact() {
return Contact;
}
public void setContact(String contact) {
Contact = contact;
}
public String getLocation() {
return Location;
}
public void setLocation(String location) {
Location = location;
}
public String getFull_Name() {
return Full_Name;
}
public void setFull_Name(String full_Name) {
Full_Name = full_Name;
}
}
不知道我错在哪里。我想根据从会话值中检索到的电子邮件，将该用户的一行中的所有值从数据库打印到片段中。 先谢谢你。