从 SQLite 数据库调用数据

Question

所以我需要有人帮助我扫描我的代码中的问题。每次我尝试运行它时页面都会崩溃。我认为问题是由于以下代码引起的。

DBController.java

public ArrayList<ProfileDB> getResult(String profileDOB, String profileSex,
        String profileWeight, String profileHeight, String textWorkout,
        String textLevel, String textWorkWeight, String textResult) {

    ArrayList<ProfileDB> profileList = new ArrayList<ProfileDB>();
    SQLiteDatabase database = this.getWritableDatabase();
    Cursor cursor = database.query(TABLE_NAME, new String[] { KEY_ID,
            KEY_NAME, KEY_DOB, KEY_SEX, KEY_WEIGHT, KEY_HEIGHT,
            KEY_WORKOUT, KEY_LEVEL, KEY_WORKWEIGHT, KEY_RESULT }, KEY_DOB
            + "='" + profileDOB + KEY_SEX + "='" + profileSex + KEY_WEIGHT
            + "='" + profileWeight + KEY_HEIGHT + "='" + profileHeight
            + KEY_WORKOUT + "='" + textWorkout + KEY_LEVEL + "='"
            + textLevel + KEY_WORKWEIGHT + "='" + textWorkWeight + "' and "
            + KEY_RESULT + "='" + textResult + "'", null, null, null, null);

    if (cursor.moveToFirst()) {
        do {
            ProfileDB p = new ProfileDB(cursor.getInt(0),
                    cursor.getString(1), cursor.getString(2),
                    cursor.getString(3), cursor.getString(4),
                    cursor.getString(5), cursor.getString(6),
                    cursor.getString(7), cursor.getString(8),
                    cursor.getString(9));

            profileList.add(p);
        } while (cursor.moveToNext());
    }
    return profileList;

}

继续.java

@Override
public void onItemSelected(AdapterView<?> parent, View view, int position,
        long id) {

    parent.getId();
    ArrayList<ProfileDB> profileList = database.getResult(null, null, null,
            null, null, null, null, textResult.getText().toString());

    String str = "";
    for (int i = 0; i < profileList.size(); i++) {
        str += profileList.get(i).getTextResult() + "\n";
    }
    textResult.setText(str);

这是我从 LogCat 得到的错误。

05-08 00:34:55.072: E/SQLiteLog(32596): (1) near "nullprofileWeight": syntax error
05-08 00:34:55.072: E/AndroidRuntime(32596): FATAL EXCEPTION: main
05-08 00:34:55.072: E/AndroidRuntime(32596): Process: com.etty.theiglove2, PID: 32596
05-08 00:34:55.072: E/AndroidRuntime(32596): android.database.sqlite.SQLiteException: near "nullprofileWeight": syntax error (code 1): , while compiling: SELECT profileId, profileName, profileDOB, profileSex, profileWeight, profileHeight, textWorkout, textLevel, textWorkWeight, textResult FROM profiles WHERE profileDOB='nullprofileSex='nullprofileWeight='nullprofileHeight='nulltextWorkout='nulltextLevel='nulltextWorkWeight='null' and textResult='100
05-08 00:34:55.072: E/AndroidRuntime(32596):    at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
05-08 00:34:55.072: E/AndroidRuntime(32596):    at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:1121)
05-08 00:34:55.072: E/AndroidRuntime(32596):    at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:694)
05-08 00:34:55.072: E/AndroidRuntime(32596):    at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
05-08 00:34:55.072: E/AndroidRuntime(32596):    at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
05-08 00:34:55.072: E/AndroidRuntime(32596):    at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:37)
05-08 00:34:55.072: E/AndroidRuntime(32596):    at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:44)
05-08 00:34:55.072: E/AndroidRuntime(32596):    at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1436)
05-08 00:34:55.072: E/AndroidRuntime(32596):    at android.database.sqlite.SQLiteDatabase.queryWithFactory(SQLiteDatabase.java:1283)
05-08 00:34:55.072: E/AndroidRuntime(32596):    at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1154)
05-08 00:34:55.072: E/AndroidRuntime(32596):    at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1322)
05-08 00:34:55.072: E/AndroidRuntime(32596):    at com.etty.theiglove2.DBController.getResult(DBController.java:177)
05-08 00:34:55.072: E/AndroidRuntime(32596):    at com.etty.theiglove2.Continue.onItemSelected(Continue.java:82)
05-08 00:34:55.072: E/AndroidRuntime(32596):    at android.widget.AdapterView.fireOnSelected(AdapterView.java:956)
05-08 00:34:55.072: E/AndroidRuntime(32596):    at android.widget.AdapterView.access$200(AdapterView.java:49)
05-08 00:34:55.072: E/AndroidRuntime(32596):    at android.widget.AdapterView$SelectionNotifier.run(AdapterView.java:920)
05-08 00:34:55.072: E/AndroidRuntime(32596):    at android.os.Handler.handleCallback(Handler.java:733)
05-08 00:34:55.072: E/AndroidRuntime(32596):    at android.os.Handler.dispatchMessage(Handler.java:95)
05-08 00:34:55.072: E/AndroidRuntime(32596):    at android.os.Looper.loop(Looper.java:157)
05-08 00:34:55.072: E/AndroidRuntime(32596):    at android.app.ActivityThread.main(ActivityThread.java:5356)
05-08 00:34:55.072: E/AndroidRuntime(32596):    at java.lang.reflect.Method.invokeNative(Native Method)
05-08 00:34:55.072: E/AndroidRuntime(32596):    at java.lang.reflect.Method.invoke(Method.java:515)
05-08 00:34:55.072: E/AndroidRuntime(32596):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265)
05-08 00:34:55.072: E/AndroidRuntime(32596):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)
05-08 00:34:55.072: E/AndroidRuntime(32596):    at dalvik.system.NativeStart.main(Native Method)

希望有人可以帮助我找出问题所在。谢谢！！

Answer 1

您的query 调用的selection 参数除了被格式化使其不可读之外，还远不及有效的SQL；单个比较表达式必须与AND 结合使用。 此外，当其中任何一个包含引号时，将字符串值直接放入 SQL 字符串中会崩溃；改用参数：

Cursor cursor = database.query(TABLE_NAME,
    new String[] { KEY_ID, KEY_NAME, KEY_DOB, KEY_SEX,
                   KEY_WEIGHT, KEY_HEIGHT, KEY_WORKOUT,
                   KEY_LEVEL, KEY_WORKWEIGHT, KEY_RESULT },
    KEY_DOB        + "= ? AND " +
    KEY_SEX        + "= ? AND " +
    KEY_WEIGHT     + "= ? AND " +
    KEY_HEIGHT     + "= ? AND " +
    KEY_WORKOUT    + "= ? AND " +
    KEY_LEVEL      + "= ? AND " +
    KEY_WORKWEIGHT + "= ? AND " +
    KEY_RESULT     + "= ?",
    new String[] { profileDOB, profileSex, profileWeight, profileHeight,
                   textWorkout, textLevel, textWorkWeight, textResult },
    null, null, null);

Answer 2

您的列名和值之间似乎没有空格。试试这样：

KEY_DOB + "='" + profileDOB + " " + KEY_SEX + "='" + profileSex + " " + ...