如何在SQLite Android Studio中连接表
如何在SQLite Android Studio中连接表
提问于 2018-05-31 04:00:10
我在SQLite数据库中创建了三个表来限制冗余。我知道这些方法有点“落后”，但这些都是这样的任务的要求。表的创建方式如下：
db=openOrCreateDatabase("STUDENTGRADES", Context.MODE_PRIVATE, null);
db.execSQL("CREATE TABLE IF NOT EXISTS STUDENT_TABLE(studentid VARCHAR, fname VARCHAR, lname VARCHAR);");
db.execSQL("CREATE TABLE IF NOT EXISTS CLASS_TABLE(studentid VARCHAR, classid VARCHAR PRIMARY KEY UNIQUE, classname VARCHAR UNIQUE);");
db.execSQL("CREATE TABLE IF NOT EXISTS GRADE_TABLE(studentid VARCHAR, classid VARCHAR, classname VARCHAR, pointgrade INTEGER, lettergrade VARCHAR);");然后我将数据分别插入到这些表中的每个表中，但是我正在寻找一种方法来将这些表连接到一个具有以下标记的表中:学生ID、学生名字、学生姓氏、班级ID、班名、点成绩和字母成绩，其中我可以在程序的其余部分使用单个表
谢谢!
编辑：
ContentValues contentValues2 = new ContentValues();
contentValues2.put("classid", classid.getText().toString());
contentValues2.put("classname", classname.getText().toString());
long result2 = db.insertWithOnConflict("CLASS_TABLE", "classid", contentValues2, SQLiteDatabase.CONFLICT_IGNORE);添加编辑，这里是完整的“添加”
add.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(fname.getText().toString().trim().length()==0||
lname.getText().toString().trim().length()==0 || studentid.getText().toString().trim().length()==0)
{
showMessage("Error", "Please enter First & Last Name and Student ID");
return;
}
ContentValues contentValues = new ContentValues();
contentValues.put("studentid", studentid.getText().toString());
contentValues.put("fname", fname.getText().toString());
contentValues.put("lname", lname.getText().toString());
long result = db.insertWithOnConflict("STUDENT_TABLE", "studentid", contentValues, SQLiteDatabase.CONFLICT_IGNORE);
if (result == -1) {
showMessage("Error", "This Name Data entry already exists");
}
ContentValues contentValues2 = new ContentValues();
contentValues2.put("classid", classid.getText().toString());
contentValues2.put("classname", classname.getText().toString());
long result2 = db.insertWithOnConflict("CLASS_TABLE", "classid", contentValues2, SQLiteDatabase.CONFLICT_IGNORE);
if (result2 == -1) {
showMessage("Error", "This Class Data entry already exists");
}
ContentValues contentValues3 = new ContentValues();
contentValues3.put("studentid", studentid.getText().toString());
contentValues3.put("classid", classid.getText().toString());
contentValues3.put("pointgrade", pointgrade.getText().toString());
contentValues3.put("lettergrade", lettergrade.getText().toString());
long result3 = db.insertWithOnConflict("GRADE_TABLE", "studentid", contentValues3, SQLiteDatabase.CONFLICT_IGNORE);
if (result3 == -1) {
showMessage("Error", "This Grade Data entry already exists");
}
if (result != -1 && result2 != -1 && result3 != -1)
showMessage("Success", "Student Record added successfully");
clearText();
}
});删除功能：
delete.setOnClickListener(new OnClickListener() {
Cursor csr = db.query("GRADE_TABLE JOIN STUDENT_TABLE ON STUDENT_TABLE.studentid = GRADE_TABLE.studentid JOIN CLASS_TABLE ON CLASS_TABLE.classid = GRADE_TABLE.classid",null,null,null,null,null,null);
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(studentid.getText().toString().trim().length()==0 || classid.getText().toString().trim().length()==0)
{
showMessage("Error", "Please enter Student and Class ID ");
return;
}
Cursor csr=db.rawQuery("SELECT * FROM GRADE_TABLE WHERE studentid='"+studentid.getText()+"' AND classid='"+classid.getText()+"'", null);
if(c.moveToFirst())
{
db.execSQL("DELETE FROM GRADE_TABLE WHERE studentid='"+studentid.getText()+"' AND classid='"+studentid.getText()+"'");
showMessage("Success", "Record Deleted");
}
else
{
showMessage("Error", "Invalid First and Last Name or Student ID");
}
clearText();
}
});回答 1
Stack Overflow用户
回答已采纳
发布于 2018-05-31 08:00:45
我建议你的模式只会引起你的问题，因为：
- CLASS_TABLE将只允许每个班级有一个学生，因为除了学生id之外，其他列具有唯一的constraint.
- The GRADE_TABLE正在通过存储班级名称引入冗余，而不是限制冗余。
我还建议你创建一些主所有列组合表的概念会给你带来问题(例如，要获得下面显示的总体结果，可能需要大量的编码才能完成，使用这样一个组合表作为源)
我建议对模式进行细微的更改，例如：
CREATE TABLE IF NOT EXISTS STUDENT_TABLE (studentid TEXT, fname TEXT, lname TEXT);
CREATE TABLE IF NOT EXISTS CLASS_TABLE(classid TEXT PRIMARY KEY, classname TEXT UNIQUE);
CREATE TABLE IF NOT EXISTS GRADE_TABLE (studentid TEXT, classid TEXT, pointgrade INTEGER, lettergrade TEXT);假设您随后使用以下代码插入了一些数据：
INSERT INTO STUDENT_TABLE
VALUES('00001','Fred','Smith'),('00010','Mary','Thomas'),('00910','Angela','Jones')
;
INSERT INTO CLASS_TABLE VALUES('001','English'),('101','Mathematics'),('201','Chemistry');
INSERT INTO GRADE_TABLE VALUES
('00001','001',99,'A'), -- Fred Smith has 99 point grade as an A in English
('00001','101',25,'F'), -- Fred Smith has 25 point grade as an F on Mathematics
('00010','201',76,'B'), -- Angela Jones 76 a B in Chemistry
('00910','101',50,'C'),
('00910','201',63,'C'),
('00910','001',89,'A')
;生成的表格将是:-
STUDENT_TABLE :-
CLASS_TABLE :-
GRADE_TABLE
然后你可以使用joins来变魔术，比如生成一个学生总分成绩列表(为所有班级添加每个学生的所有点数)以及他们所在的班级，例如:-
SELECT fname,
lname,
sum(pointgrade) AS overallgrade,
group_concat(classname,' - ') AS classes
FROM GRADE_TABLE
JOIN STUDENT_TABLE ON GRADE_TABLE.studentid = STUDENT_TABLE.studentid
JOIN CLASS_TABLE ON GRADE_TABLE.classid = CLASS_TABLE.classid
GROUP BY STUDENT_TABLE.studentid
ORDER BY overallgrade DESC
;这将导致：
注释sum和group_contact是在SQL As Understood By SQLite - Aggregate Functions中解释的聚合函数，它们将处理分组的结果。
- 如果没有GROUP BY，那么您将得到所有行的**1*结果行。但是，由于使用了
GROUP BY STUDENT_TABLE.studentid，因此会为每个学生组返回结果，即 -
GROUP BY GRADE_TABLE.studentid将具有相同的
为了完整地回答您的问题，但使用建议的模式，则以下SQL将相应地连接：
SELECT
STUDENT_TABLE.studentid,
fname,
lname,
CLASS_TABLE.classid,
classname,
pointgrade,
lettergrade
FROM GRADE_TABLE
JOIN STUDENT_TABLE ON STUDENT_TABLE.studentid = GRADE_TABLE.studentid
JOIN CLASS_TABLE ON CLASS_TABLE.classid = GRADE_TABLE.classid;这将导致以下结果：
基于原始代码和建议的模式，并使用Are there any methods that assist with resolving common SQLite issues? 中提供的类
注意：上面的代码只能运行一次，因为后续运行将导致唯一约束冲突(也就是说，你不能向CLASS_TABLE中添加重复的行)
以下代码：
SQLiteDatabase db;
db=openOrCreateDatabase("STUDENTGRADES", Context.MODE_PRIVATE, null);
db.execSQL("CREATE TABLE IF NOT EXISTS STUDENT_TABLE (studentid TEXT, fname TEXT, lname TEXT)");
db.execSQL("CREATE TABLE IF NOT EXISTS CLASS_TABLE(classid TEXT PRIMARY KEY, classname TEXT UNIQUE)");
db.execSQL("CREATE TABLE IF NOT EXISTS GRADE_TABLE (studentid TEXT, classid TEXT, pointgrade INTEGER, lettergrade TEXT)");
db.execSQL("INSERT INTO STUDENT_TABLE \n" +
" VALUES('00001','Fred','Smith'),('00010','Mary','Thomas'),('00910','Angela','Jones')"
);
db.execSQL("INSERT INTO CLASS_TABLE VALUES('001','English'),('101','Mathematics'),('201','Chemistry');");
db.execSQL("INSERT INTO GRADE_TABLE VALUES\n" +
" ('00001','001',99,'A'), -- Fred Smith has 99 point grade as an A in English\n" +
" ('00001','101',25,'F'), -- Fred Smith has 25 point grade as an F on Mathematics\n" +
" ('00010','201',76,'B'), -- Angela Jones 76 a B in Chemistry\n" +
" ('00910','101',50,'C'), \n" +
" ('00910','201',63,'C'),\n" +
" ('00910','001',89,'A')\n" +
";");
Cursor csr = db.query("GRADE_TABLE JOIN STUDENT_TABLE ON STUDENT_TABLE.studentid = GRADE_TABLE.studentid JOIN CLASS_TABLE ON CLASS_TABLE.classid = GRADE_TABLE.classid",null,null,null,null,null,null);
CommonSQLiteUtilities.logDatabaseInfo(db);
CommonSQLiteUtilities.logCursorData(csr);
csr.close();结果如下：
05-31 04:20:32.605 3582-3582/? D/SQLITE_CSU: DatabaseList Row 1 Name=main File=/data/data/cpa.carpurchases/databases/STUDENTGRADES
Database Version = 0
Table Name = android_metadata Created Using = CREATE TABLE android_metadata (locale TEXT)
Table = android_metadata ColumnName = locale ColumnType = TEXT Default Value = null PRIMARY KEY SEQUENCE = 0
Table Name = STUDENT_TABLE Created Using = CREATE TABLE STUDENT_TABLE (studentid TEXT, fname TEXT, lname TEXT)
Table = STUDENT_TABLE ColumnName = studentid ColumnType = TEXT Default Value = null PRIMARY KEY SEQUENCE = 0
Table = STUDENT_TABLE ColumnName = fname ColumnType = TEXT Default Value = null PRIMARY KEY SEQUENCE = 0
Table = STUDENT_TABLE ColumnName = lname ColumnType = TEXT Default Value = null PRIMARY KEY SEQUENCE = 0
Table Name = CLASS_TABLE Created Using = CREATE TABLE CLASS_TABLE(classid TEXT PRIMARY KEY, classname TEXT UNIQUE)
Table = CLASS_TABLE ColumnName = classid ColumnType = TEXT Default Value = null PRIMARY KEY SEQUENCE = 1
Table = CLASS_TABLE ColumnName = classname ColumnType = TEXT Default Value = null PRIMARY KEY SEQUENCE = 0
Table Name = GRADE_TABLE Created Using = CREATE TABLE GRADE_TABLE (studentid TEXT, classid TEXT, pointgrade INTEGER, lettergrade TEXT)
Table = GRADE_TABLE ColumnName = studentid ColumnType = TEXT Default Value = null PRIMARY KEY SEQUENCE = 0
Table = GRADE_TABLE ColumnName = classid ColumnType = TEXT Default Value = null PRIMARY KEY SEQUENCE = 0
Table = GRADE_TABLE ColumnName = pointgrade ColumnType = INTEGER Default Value = null PRIMARY KEY SEQUENCE = 0
Table = GRADE_TABLE ColumnName = lettergrade ColumnType = TEXT Default Value = null PRIMARY KEY SEQUENCE = 0
05-31 04:20:32.609 3582-3582/? D/SQLITE_CSU: logCursorData Cursor has 12 rows with 9 columns.
Information for row 1 offset=0
For Column studentid Type is STRING value as String is 00001 value as long is 1 value as double is 1.0
For Column classid Type is STRING value as String is 001 value as long is 1 value as double is 1.0
For Column pointgrade Type is INTEGER value as String is 99 value as long is 99 value as double is 99.0
For Column lettergrade Type is STRING value as String is A value as long is 0 value as double is 0.0
For Column studentid Type is STRING value as String is 00001 value as long is 1 value as double is 1.0
For Column fname Type is STRING value as String is Fred value as long is 0 value as double is 0.0
For Column lname Type is STRING value as String is Smith value as long is 0 value as double is 0.0
For Column classid Type is STRING value as String is 001 value as long is 1 value as double is 1.0
For Column classname Type is STRING value as String is English value as long is 0 value as double is 0.0
Information for row 2 offset=1
For Column studentid Type is STRING value as String is 00001 value as long is 1 value as double is 1.0
For Column classid Type is STRING value as String is 001 value as long is 1 value as double is 1.0
For Column pointgrade Type is INTEGER value as String is 99 value as long is 99 value as double is 99.0
For Column lettergrade Type is STRING value as String is A value as long is 0 value as double is 0.0
For Column studentid Type is STRING value as String is 00001 value as long is 1 value as double is 1.0
For Column fname Type is STRING value as String is Fred value as long is 0 value as double is 0.0
For Column lname Type is STRING value as String is Smith value as long is 0 value as double is 0.0
For Column classid Type is STRING value as String is 001 value as long is 1 value as double is 1.0
For Column classname Type is STRING value as String is English value as long is 0 value as double is 0.0
Information for row 3 offset=2
For Column studentid Type is STRING value as String is 00001 value as long is 1 value as double is 1.0
For Column classid Type is STRING value as String is 101 value as long is 101 value as double is 101.0
For Column pointgrade Type is INTEGER value as String is 25 value as long is 25 value as double is 25.0
For Column lettergrade Type is STRING value as String is F value as long is 0 value as double is 0.0
For Column studentid Type is STRING value as String is 00001 value as long is 1 value as double is 1.0
For Column fname Type is STRING value as String is Fred value as long is 0 value as double is 0.0
For Column lname Type is STRING value as String is Smith value as long is 0 value as double is 0.0
For Column classid Type is STRING value as String is 101 value as long is 101 value as double is 101.0
For Column classname Type is STRING value as String is Mathematics value as long is 0 value as double is 0.0
05-31 04:20:32.621 3582-3584/? D/dalvikvm: GC_CONCURRENT freed 338K, 11% free 6233K/6983K, paused 10ms+0ms, total 12ms
05-31 04:20:32.621 3582-3582/? D/SQLITE_CSU: Information for row 4 offset=3
For Column studentid Type is STRING value as String is 00001 value as long is 1 value as double is 1.0
For Column classid Type is STRING value as String is 101 value as long is 101 value as double is 101.0
For Column pointgrade Type is INTEGER value as String is 25 value as long is 25 value as double is 25.0
For Column lettergrade Type is STRING value as String is F value as long is 0 value as double is 0.0
For Column studentid Type is STRING value as String is 00001 value as long is 1 value as double is 1.0
For Column fname Type is STRING value as String is Fred value as long is 0 value as double is 0.0
For Column lname Type is STRING value as String is Smith value as long is 0 value as double is 0.0
For Column classid Type is STRING value as String is 101 value as long is 101 value as double is 101.0
For Column classname Type is STRING value as String is Mathematics value as long is 0 value as double is 0.0
Information for row 5 offset=4
For Column studentid Type is STRING value as String is 00010 value as long is 8 value as double is 10.0
For Column classid Type is STRING value as String is 201 value as long is 201 value as double is 201.0
For Column pointgrade Type is INTEGER value as String is 76 value as long is 76 value as double is 76.0
For Column lettergrade Type is STRING value as String is B value as long is 0 value as double is 0.0
For Column studentid Type is STRING value as String is 00010 value as long is 8 value as double is 10.0
For Column fname Type is STRING value as String is Mary value as long is 0 value as double is 0.0
For Column lname Type is STRING value as String is Thomas value as long is 0 value as double is 0.0
For Column classid Type is STRING value as String is 201 value as long is 201 value as double is 201.0
For Column classname Type is STRING value as String is Chemistry value as long is 0 value as double is 0.0
Information for row 6 offset=5
For Column studentid Type is STRING value as String is 00010 value as long is 8 value as double is 10.0
For Column classid Type is STRING value as String is 201 value as long is 201 value as double is 201.0
For Column pointgrade Type is INTEGER value as String is 76 value as long is 76 value as double is 76.0
For Column lettergrade Type is STRING value as String is B value as long is 0 value as double is 0.0
For Column studentid Type is STRING value as String is 00010 value as long is 8 value as double is 10.0
For Column fname Type is STRING value as String is Mary value as long is 0 value as double is 0.0
For Column lname Type is STRING value as String is Thomas value as long is 0 value as double is 0.0
For Column classid Type is STRING value as String is 201 value as long is 201 value as double is 201.0
For Column classname Type is STRING value as String is Chemistry value as long is 0 value as double is 0.0
Information for row 7 offset=6
For Column studentid Type is STRING value as String is 00910 value as long is 0 value as double is 910.0
For Column classid Type is STRING value as String is 101 value as long is 101 value as double is 101.0
For Column pointgrade Type is INTEGER value as String is 50 value as long is 50 value as double is 50.0
For Column lettergrade Type is STRING value as String is C value as long is 0 value as double is 0.0
For Column studentid Type is STRING value as String is 00910 value as long is 0 value as double is 910.0
For Column fname Type is STRING value as String is Angela value as long is 0 value as double is 0.0
For Column lname Type is STRING value as String is Jones value as long is 0 value as double is 0.0
For Column classid Type is STRING value as String is 101 value as long is 101 value as double is 101.0
For Column classname Type is STRING value as String is Mathematics value as long is 0 value as double is 0.0
05-31 04:20:32.637 3582-3584/? D/dalvikvm: GC_CONCURRENT freed 409K, 12% free 6226K/7047K, paused 11ms+0ms, total 13ms
05-31 04:20:32.637 3582-3582/? D/SQLITE_CSU: Information for row 8 offset=7
For Column studentid Type is STRING value as String is 00910 value as long is 0 value as double is 910.0
For Column classid Type is STRING value as String is 101 value as long is 101 value as double is 101.0
For Column pointgrade Type is INTEGER value as String is 50 value as long is 50 value as double is 50.0
For Column lettergrade Type is STRING value as String is C value as long is 0 value as double is 0.0
For Column studentid Type is STRING value as String is 00910 value as long is 0 value as double is 910.0
For Column fname Type is STRING value as String is Angela value as long is 0 value as double is 0.0
For Column lname Type is STRING value as String is Jones value as long is 0 value as double is 0.0
For Column classid Type is STRING value as String is 101 value as long is 101 value as double is 101.0
For Column classname Type is STRING value as String is Mathematics value as long is 0 value as double is 0.0
Information for row 9 offset=8
For Column studentid Type is STRING value as String is 00910 value as long is 0 value as double is 910.0
For Column classid Type is STRING value as String is 201 value as long is 201 value as double is 201.0
For Column pointgrade Type is INTEGER value as String is 63 value as long is 63 value as double is 63.0
For Column lettergrade Type is STRING value as String is C value as long is 0 value as double is 0.0
For Column studentid Type is STRING value as String is 00910 value as long is 0 value as double is 910.0
For Column fname Type is STRING value as String is Angela value as long is 0 value as double is 0.0
For Column lname Type is STRING value as String is Jones value as long is 0 value as double is 0.0
For Column classid Type is STRING value as String is 201 value as long is 201 value as double is 201.0
For Column classname Type is STRING value as String is Chemistry value as long is 0 value as double is 0.0
Information for row 10 offset=9
For Column studentid Type is STRING value as String is 00910 value as long is 0 value as double is 910.0
For Column classid Type is STRING value as String is 201 value as long is 201 value as double is 201.0
For Column pointgrade Type is INTEGER value as String is 63 value as long is 63 value as double is 63.0
For Column lettergrade Type is STRING value as String is C value as long is 0 value as double is 0.0
For Column studentid Type is STRING value as String is 00910 value as long is 0 value as double is 910.0
For Column fname Type is STRING value as String is Angela value as long is 0 value as double is 0.0
For Column lname Type is STRING value as String is Jones value as long is 0 value as double is 0.0
For Column classid Type is STRING value as String is 201 value as long is 201 value as double is 201.0
For Column classname Type is STRING value as String is Chemistry value as long is 0 value as double is 0.0
Information for row 11 offset=10
For Column studentid Type is STRING value as String is 00910 value as long is 0 value as double is 910.0
For Column classid Type is STRING value as String is 001 value as long is 1 value as double is 1.0
For Column pointgrade Type is INTEGER value as String is 89 value as long is 89 value as double is 89.0
For Column lettergrade Type is STRING value as String is A value as long is 0 value as double is 0.0
For Column studentid Type is STRING value as String is 00910 value as long is 0 value as double is 910.0
For Column fname Type is STRING value as String is Angela value as long is 0 value as double is 0.0
For Column lname Type is STRING value as String is Jones value as long is 0 value as double is 0.0
For Column classid Type is STRING value as String is 001 value as long is 1 value as double is 1.0
For Column classname Type is STRING value as String is English value as long is 0 value as double is 0.0
Information for row 12 offset=11
For Column studentid Type is STRING value as String is 00910 value as long is 0 value as double is 910.0
For Column classid Type is STRING value as String is 001 value as long is 1 value as double is 1.0
For Column pointgrade Type is INTEGER value as String is 89 value as long is 89 value as double is 89.0
For Column lettergrade Type is STRING value as String is A value as long is 0 value as double is 0.0
For Column studentid Type is STRING value as String is 00910 value as long is 0 value as double is 910.0
For Column fname Type is STRING value as String is Angela value as long is 0 value as double is 0.0
For Column lname Type is STRING value as String is Jones value as long is 0 value as double is 0.0
For Column classid Type is STRING value as String is 001 value as long is 1 value as double is 1.0
For Column classname Type is STRING value as String is English value as long is 0 value as double is 0.0附加re重复类
下面的代码通过添加一个新学生来扩展上面的内容，该学生将注册到001 - English班级(已经存在)，使用:-
ContentValues cv = new ContentValues();
String studentid = "00002";
String fname = "Bert";
String lname = "Jones";
String classid = "001";
String classname = "English";
int pointgrade = 56;
String lettergrade = "C";
cv.put("studentid",studentid);
cv.put("fname",fname);
cv.put("lname",lname);
if (db.insert("STUDENT_TABLE",null,cv) > 0) {
cv.clear();
cv.put("classid",classid);
cv.put("classname",classname);
if (db.insert("CLASS_TABLE",null,cv) > 0) {
Log.d(
"CLASSADD",
"Class " +
cv.getAsString("classid") +
" - " +
cv.getAsString("classname") +
" ADDED."
);
} else {
Log.d(
"CLASSADD",
"Class " +
cv.getAsString(
"classid") +
" - " +
cv.getAsString("classname") +
" NOT ADDED (Exists)"
);
}
cv.clear();
cv.put("studentid",studentid);
cv.put("classid",classid);
cv.put("pointgrade",pointgrade);
cv.put("lettergrade",lettergrade);
if (db.insert("GRADE_TABLE",null,cv) > 0) {
Log.d("ENROLRESULT",
"Student " +
cv.getAsString("studentid") +
" - " +
cv.getAsString("fname") +
" " +
cv.getAsString("lname")
+ " pointgrade " +
String.valueOf(cv.getAsInteger("pointgrade")) +
" lettergrade " +
cv.getAsString("lettergrade") +
" ENROLLED"
);
}
}这是：
- 尝试添加(插入)新学生。
- 如果未添加该学生，则没有其他内容是英语:-
- 尝试使用普通的
insert方法添加(插入)已存在的班级(001 - CLASS_TABLE ) (SQL将为INSERT OR IGNORE INTO CLASS_TABLE.....)。 - 记录消息，指示是否已添加或不添加重要位<<<<<>H273
- 添加适当的GRADE_TABLE SQL
- 尝试使用普通的
运行上述命令将向日志中发出以下消息:-
05-31 08:13:43.557 4476-4476/? D/CLASSADD: Class 001 - English NOT ADDED (Exists)
05-31 08:13:43.565 4476-4476/? D/ENROLRESULT: Student 00002 - null null pointgrade 56 lettergrade C ENROLLED应用程序不会崩溃。
但是，日志中还包括 :-
05-31 08:13:43.557 4476-4476/? E/SQLiteDatabase: Error inserting classname=English classid=001
android.database.sqlite.SQLiteConstraintException: column classname is not unique (code 19)
at android.database.sqlite.SQLiteConnection.nativeExecuteForLastInsertedRowId(Native Method)
at android.database.sqlite.SQLiteConnection.executeForLastInsertedRowId(SQLiteConnection.java:775)
at android.database.sqlite.SQLiteSession.executeForLastInsertedRowId(SQLiteSession.java:788)
at android.database.sqlite.SQLiteStatement.executeInsert(SQLiteStatement.java:86)
at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1469)
at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1339)
at cpa.carpurchases.MainActivity.onCreate(MainActivity.java:99)
at android.app.Activity.performCreate(Activity.java:5008)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
at android.app.ActivityThread.access$600(ActivityThread.java:130)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4745)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)- 注意，缺少致命的运行时报告时间戳
- 无法插入@
- 05-31 08:13:43.557
- but reports注册@
- 05-31 08:13:43.565
基本上，SQLite的insert捕获了允许处理继续进行的错误，但打印了堆栈跟踪(可以说它不应该，也可以说它应该)
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原文链接：
https://stackoverflow.com/questions/50612561
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