onCreate（）的活動崩潰

我使用SQLite構建了一個數據庫，當我嘗試運行填充數據庫的主活動文件時，它在onCreate上崩潰。我無法加載該活動。我的onCreate方法使用getWriteableDatabase打開一個數據庫，並且我只是將值className，workoutName和id添加到我創建的表中，這些表會執行這些值。出於某種原因，我的活動甚至無法加載。有任何想法嗎？onCreate（）的活動崩潰

下面是我的代碼：

import android.app.Activity; 
import android.content.ContentValues; 
import android.content.Intent; 
import android.database.sqlite.SQLiteDatabase; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.Button; 

public class poetry3 extends Activity { 

Button next; 
ClassName addName; 
Preference prefs; 
DBHelper1 dbHelper; 
SQLiteDatabase db; 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    // TODO Auto-generated method stub 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.poetry3); 
    dbHelper = new DBHelper1(this); 
    String className = "edu.njit.hss.poetry3"; 
    String workoutName = "Poetry 3"; 
    Calendar currentDate = Calendar.getInstance(); 
    String date = currentDate.getTime().toString(); 

    int classID = 1; 


    db = dbHelper.getWritableDatabase(); 
    ContentValues values = new ContentValues(); 


    //if(values.size() > 25) 

    values.clear(); 
    values.put(DBHelper1.C_ID, classID); 
    values.put(DBHelper1.C_CLASSNAME, className); 
    values.put(DBHelper1.C_WORKOUT_NAME, workoutName); 
    values.put(DBHelper1.C_CREATED_AT, date); 
    db.insertOrThrow(DBHelper1.TABLE, null, values); 



    next = (Button)findViewById(R.id.Continue); 
    next.setOnClickListener(phaseHandler); 

} 

View.OnClickListener phaseHandler = new View.OnClickListener() { 

    @Override 
    public void onClick(View v) { 
     // TODO Auto-generated method stub 
     if(next.getId() == ((Button)v).getId()){ 
      Intent i = new Intent(poetry3.this, poetry5.class); 
      startActivity(i); 
     } 

    } 
}; 

    }

這裏是logcat的輸出：

07-21 18:57:26.628: ERROR/AndroidRuntime(695): FATAL EXCEPTION: main 
07-21 18:57:26.628: ERROR/AndroidRuntime(695): java.lang.RuntimeException: Unable to start activity ComponentInfo{edu.njit.hss/edu.njit.hss.poetry3}: android.database.sqlite.SQLiteException: near "at": syntax error: , while compiling: INSERT INTO history(workout_name, created at, _ID, classname) VALUES(?, ?, ?, ?); 
07-21 18:57:26.628: ERROR/AndroidRuntime(695):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1622) 
07-21 18:57:26.628: ERROR/AndroidRuntime(695):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1638) 
07-21 18:57:26.628: ERROR/AndroidRuntime(695):  at android.app.ActivityThread.access$1500(ActivityThread.java:117) 
07-21 18:57:26.628: ERROR/AndroidRuntime(695):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:928) 
07-21 18:57:26.628: ERROR/AndroidRuntime(695):  at android.os.Handler.dispatchMessage(Handler.java:99) 
07-21 18:57:26.628: ERROR/AndroidRuntime(695):  at android.os.Looper.loop(Looper.java:123) 
07-21 18:57:26.628: ERROR/AndroidRuntime(695):  at android.app.ActivityThread.main(ActivityThread.java:3647) 
07-21 18:57:26.628: ERROR/AndroidRuntime(695):  at java.lang.reflect.Method.invokeNative(Native Method) 
07-21 18:57:26.628: ERROR/AndroidRuntime(695):  at java.lang.reflect.Method.invoke(Method.java:507) 
07-21 18:57:26.628: ERROR/AndroidRuntime(695):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 
07-21 18:57:26.628: ERROR/AndroidRuntime(695):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 
07-21 18:57:26.628: ERROR/AndroidRuntime(695):  at dalvik.system.NativeStart.main(Native Method) 
07-21 18:57:26.628: ERROR/AndroidRuntime(695): Caused by: android.database.sqlite.SQLiteException: near "at": syntax error: , while compiling: INSERT INTO history(workout_name, created at, _ID, classname) VALUES(?, ?, ?, ?); 
07-21 18:57:26.628: ERROR/AndroidRuntime(695):  at android.database.sqlite.SQLiteCompiledSql.native_compile(Native Method) 
07-21 18:57:26.628: ERROR/AndroidRuntime(695):  at android.database.sqlite.SQLiteCompiledSql.compile(SQLiteCompiledSql.java:92) 
07-21 18:57:26.628: ERROR/AndroidRuntime(695):  at android.database.sqlite.SQLiteCompiledSql.<init>(SQLiteCompiledSql.java:65) 
07-21 18:57:26.628: ERROR/AndroidRuntime(695):  at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:83) 
07-21 18:57:26.628: ERROR/AndroidRuntime(695):  at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:41) 
07-21 18:57:26.628: ERROR/AndroidRuntime(695):  at android.database.sqlite.SQLiteDatabase.compileStatement(SQLiteDatabase.java:1149) 
07-21 18:57:26.628: ERROR/AndroidRuntime(695):  at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1549) 
07-21 18:57:26.628: ERROR/AndroidRuntime(695):  at android.database.sqlite.SQLiteDatabase.insertOrThrow(SQLiteDatabase.java:1444) 
07-21 18:57:26.628: ERROR/AndroidRuntime(695):  at edu.njit.hss.poetry3.onCreate(poetry3.java:49) 
07-21 18:57:26.628: ERROR/AndroidRuntime(695):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
07-21 18:57:26.628: ERROR/AndroidRuntime(695):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1586) 
07-21 18:57:26.628: ERROR/AndroidRuntime(695):  ... 11 more 
07-21 18:57:26.658: WARN/ActivityManager(39): Force finishing activity edu.njit.hss/.poetry3

來源

2012-07-21 K D

它是否強制關閉？如果是這樣，請發佈崩潰的LogCat日誌。 – Eric 2012-07-21 18:35:46

LogCat需要.. – 2012-07-21 18:38:26

如果你想要一個解決方案，你也必須給你的LogCat。 – bmavus 2012-07-21 18:42:16

的錯誤是在你的數據庫的創建表語句（以DBHelper1.onCreate（））：

create table history(BaseColumns._ID int primary key, classname text workout_nametext)

如果你想在引用該id在ContentProvider的（如ContactsContract，CalendarContract等）瞭解到， BaseColumns._ID意味着SQL中的一些非常不同的東西;你也錯過了逗號和空格。我假設你的意思是：

create table history(_id integer primary key, classname text, workout_name text)

如果您張貼在那裏你創建你的SQLite數據庫的字符串，我可以更具體介紹一下語法...

String table_create = "create table " + table_name + " (" + BaseColumns._ID + ...

新的logcat

要閱讀LogCat，經常要查找最低的「由...引起」，在這種情況下：

Caused by: android.database.sqlite.SQLiteException: near "at": syntax error: , while compiling: INSERT INTO history(workout_name, created at, _ID, classname) VALUES(?, ?, ?, ?);

這發生在poetry3.onCreate（），特別是在第49行

在這裏你可以看到，導致錯誤「在創造」，SQLite的變量定義爲一個字的名字，也許你的意思created_at？但您的創建聲明只有三列，所以我只是將其刪除：

INSERT INTO history(_ID, classname, workout_name) VALUES(?, ?, ?, ?);

來源

2012-07-21 18:51:43 Sam

String sql =「create table」+ TABLE +「（」+ C_ID +「int primary key，」+ \t \t C_CLASSNAME +「text」+ C_WORKOUT_NAME +「文字）」; – 2012-07-21 19:01:14

我還添加了新的LogCat輸出。感謝您的幫助順便說一句。 – 2012-07-21 19:01:47

我的新字符串看起來像這樣，但它說我沒有列created_at？String sql =「create table」+ TABLE +「（」+ C_ID +「int primary key」，+ \t \t C_CLASSNAME +「text」+ C_CREATED_AT +「int」+ C_WORKOUT_NAME +「text）」; – 2012-07-21 19:17:13

這裏的錯誤：

07-21 18:39:32.788: ERROR/Database(507): Failure 1 (near ".": syntax error) on 0x1e0058 when preparing 'create table history(BaseColumns._ID int primary key, classname text workout_nametext)'.

你需要一個空間和一個逗號：「classname text，workout_name text」。

來源

2012-07-21 18:49:46 bos

感謝您的幫助。其他人提到我做了更改併發布了新的LogCat輸出 – 2012-07-21 19:02:36

onCreate（）的活動崩潰

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