當我嘗試寫入或更新到SQLite數據庫時，我的通訊錄應用程序停止運行

Question

每當我嘗試添加新聯系人或更新現有聯系人時，我的應用似乎都會停止

我的應用程序很簡單，我讓用戶輸入聯系人的數據（名字，姓氏，移動電話等），然后將其保存到數據庫中，然后就可以在主列表視圖中看到它了（尚未完成:)），然后然后他可以選擇要顯示的聯系人以對其進行編輯或刪除

你能幫我解決那些崩潰嗎？

下面是數據庫類

public class DBcreator extends SQLiteOpenHelper {
/*
 * this class is responsible for all the database manipulation and
 * requirements it is called inside other classes for implementation
 */
public static final String DATABASE_NAME = "contacts";// NAME OF THE
                                                        // DATABASE//
public static final String DATABASE_TABLE = "contactsdisplay";// NAME OF THE
                                                                // TABLE
                                                                // INSIDE OF
                                                                // IT//
// THE DATA INSIDE THE TABLE//
public static final String KEY_FNAME = "first name";
public static final String KEY_LNAME = "last name";
public static final String KEY_MOBILE = "mobile";
public static final String KEY_ADDRESS = "address";
public static final String KEY_ROWID = "_id";
// VERSION OF THE DATABASE//
public static final int DATABASE_VERSION = 1;
// create database//
public static final String DATABASE_CREATE = "Create table"
        + DATABASE_TABLE + "(" + KEY_ROWID
        + "integer primary key autoincrement," + KEY_FNAME + "TEXT"
        + KEY_LNAME + "TEXT" + KEY_MOBILE + "TEXT" + KEY_ADDRESS + "TEXT);";

public DBcreator(Context context) {
    super(context, DATABASE_NAME, null, DATABASE_VERSION);
    // TODO Auto-generated constructor stub
}

@Override
public void onCreate(android.database.sqlite.SQLiteDatabase db) {
    // TODO Auto-generated method stub
    db.execSQL(DATABASE_CREATE);// this orders the code to create the
                                // database//

}

@Override
public void onUpgrade(android.database.sqlite.SQLiteDatabase db,
        int oldVersion, int newVersion) {
    // drop old version and use the new one//
    db.execSQL("DROP TABLE IF EXISTS " + DATABASE_TABLE);
    onCreate(db);

}

public long add(String fname, String lname, String mob, String address) {
    // getting the database and editing in it//
    SQLiteDatabase db = this.getWritableDatabase();
    // insert what the user had entered in the database//
    ContentValues cv = new ContentValues();
    cv.put(KEY_FNAME, fname);
    cv.put(KEY_LNAME, lname);
    cv.put(KEY_MOBILE, mob);
    cv.put(KEY_ADDRESS, address);
    // db.insert(DATABASE_TABLE, null, cv);
    return db.insert(DATABASE_TABLE, null, cv);

}

public void savechanges(String fname, String lname, String mob,
        String address) {
    // change the existing data of the contact by lookup then replace//
    SQLiteDatabase db = this.getWritableDatabase();
    String[] array = new String[] { KEY_ROWID, KEY_FNAME, KEY_LNAME,
            KEY_MOBILE, KEY_ADDRESS };
    Cursor c = db.query(DATABASE_TABLE, array, fname, null, null, null,
            null);
    // we need to loop inside the database to find the existing values and
    // replace them//
    for (c.moveToFirst(); !c.isAfterLast(); c.moveToNext()) {
        int firstname = c.getColumnIndex(KEY_FNAME);
        int lastname = c.getColumnIndex(KEY_FNAME);
        int mobile = c.getColumnIndex(KEY_FNAME);
        int address2 = c.getColumnIndex(KEY_FNAME);
        if (c.getString(firstname).equals(fname)) {
            ContentValues changes = new ContentValues();
            changes.put(KEY_FNAME, fname);
            changes.put(KEY_LNAME, lname);
            changes.put(KEY_MOBILE, mob);
            changes.put(KEY_ADDRESS, address);
            db.update(DATABASE_TABLE, changes, KEY_FNAME + "=" + fname,
                    null);
            break;
        }
    }
}

public void deletecontact(String fnamedelete) {
    // TODO Auto-generated method stub
    SQLiteDatabase db = this.getWritableDatabase();
    db.delete(DATABASE_TABLE, KEY_FNAME + "=" + fnamedelete, null);
}

public String[] queryall() {
    String[] FirstNames = new String[] { KEY_FNAME };
    SQLiteDatabase db = this.getWritableDatabase();
    Cursor cfname = db.query(DATABASE_TABLE, FirstNames, null, null, null,
            null, null);// to see all contacts//
    int GetTheName = cfname.getColumnIndex(KEY_FNAME);
    List<String> TheNames = new ArrayList<String>();
    {

        cfname.moveToFirst();
        while (cfname.moveToNext()) {
            TheNames.add(cfname.getString(GetTheName));

        }
        return TheNames.toArray(new String[TheNames.size()]);
    }

}

}

下面是CreateContact類：公共類CreateContact擴展Activity實現OnClickListener {Button Create; TextView的fname，lname，mobile，地址； EditText editfirst，editlast，editmobile，editaddress;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.createcontact);
    Create = (Button) findViewById(R.id.SaveNewContact);
    fname = (TextView) findViewById(R.id.FirstNametv1);
    lname = (TextView) findViewById(R.id.LastNametv1);
    mobile = (TextView) findViewById(R.id.Mobiletv1);
    address = (TextView) findViewById(R.id.Addresstv1);
    editfirst = (EditText) findViewById(R.id.EditFirstName);
    editlast = (EditText) findViewById(R.id.EditLastName);
    editmobile = (EditText) findViewById(R.id.EditMobile);
    editaddress = (EditText) findViewById(R.id.EditAddress);

    Create.setOnClickListener(this);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

@Override
public void onClick(View v) {
    // TODO Auto-generated method stub
    DBcreator addition = new DBcreator(CreateContact.this);
    // her you ADD (put) the new data to the SQLite//
    String fname = editfirst.getEditableText().toString();
    String lname = editlast.getEditableText().toString();
    String mob = editmobile.getEditableText().toString();
    String address = editaddress.getEditableText().toString();

    addition.add(fname, lname, mob, address);
    addition.close();
    // go back to the main activity after changes took place//
    Intent k = new Intent(CreateContact.this, MainActivity.class);
    startActivity(k);
}
}

下面是EditContact類：

public class EditContact extends Activity implements OnClickListener {
Button SaveEdit, Cancel, Delete;
TextView fname2, lname2, mobile2, address2;
EditText editfirst2, editlast2, editmobile2, editaddress2;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.editcontact);
    SaveEdit = (Button) findViewById(R.id.SaveChanges);
    Cancel = (Button) findViewById(R.id.CancelButton);
    Delete = (Button) findViewById(R.id.DeleteContact);
    fname2 = (TextView) findViewById(R.id.FirstNametv2);
    lname2 = (TextView) findViewById(R.id.LastNametv2);
    mobile2 = (TextView) findViewById(R.id.Mobiletv2);
    address2 = (TextView) findViewById(R.id.Addresstv2);
    editfirst2 = (EditText) findViewById(R.id.ViewFirstName);
    editlast2 = (EditText) findViewById(R.id.ViewLastName);
    editmobile2 = (EditText) findViewById(R.id.ViewMobile);
    editaddress2 = (EditText) findViewById(R.id.ViewAddress);

    SaveEdit.setOnClickListener(this);
    Cancel.setOnClickListener(this);
    Delete.setOnClickListener(this);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

@Override
public void onClick(View v) {
    // TODO Auto-generated method stub

    switch (v.getId()) {
    case R.id.SaveChanges:
        DBcreator edit = new DBcreator(EditContact.this);
        String fname = editfirst2.getEditableText().toString();
        String lname = editlast2.getEditableText().toString();
        String mob = editmobile2.getEditableText().toString();
        String address = editaddress2.getEditableText().toString();
        edit.savechanges(fname, lname, mob, address);
        edit.close();
        Intent y = new Intent(EditContact.this, MainActivity.class);
        startActivity(y);
        break;
    case R.id.CancelButton:
        Intent k = new Intent(EditContact.this, MainActivity.class);
        startActivity(k);
        break;
    case R.id.DeleteContact:
        DBcreator delete = new DBcreator(EditContact.this);
        String fnamedelete = editfirst2.getEditableText().toString();
        String lnamedelete = editlast2.getEditableText().toString();
        String mobdelete = editmobile2.getEditableText().toString();
        String addressdelete = editaddress2.getEditableText().toString();
        delete.deletecontact(fnamedelete);
        delete.close();
        Intent h = new Intent(EditContact.this, MainActivity.class);
        startActivity(h);
        break;
    }
}

}

日志貓

12-30 12:08:31.794: E/Trace(11691): error opening trace file: No such file or directory (2)
12-30 12:08:32.184: W/MMUMapper(11691): fail to register MVA, unsupported format(0x5)
12-30 12:08:32.477: W/MMUMapper(11691): fail to register MVA, unsupported format(0x5)
12-30 12:08:32.530: W/MMUMapper(11691): fail to register MVA, unsupported format(0x5)
12-30 12:08:33.303: I/SurfaceTextureClient(11691): [0x4f05e390] frames:9, duration:1.000000, fps:8.996834
12-30 12:08:34.680: W/MMUMapper(11691): fail to register MVA, unsupported format(0x5)
12-30 12:08:34.719: I/SurfaceTextureClient(11691): [0x4f05e390] frames:11, duration:1.407000, fps:7.816139
12-30 12:08:34.958: W/MMUMapper(11691): fail to register MVA, unsupported format(0x5)
12-30 12:08:35.019: W/MMUMapper(11691): invalid operation for unregister MVA with VA(0x526d0000) size(614400) f(0x5)
12-30 12:08:35.020: W/MMUMapper(11691): invalid operation for unregister MVA with VA(0x5295d000) size(614400) f(0x5)
12-30 12:08:35.020: W/MMUMapper(11691): invalid operation for unregister MVA with VA(0x52b00000) size(614400) f(0x5)
12-30 12:08:35.270: W/MMUMapper(11691): fail to register MVA, unsupported format(0x5)
12-30 12:08:36.274: I/SurfaceTextureClient(11691): [0x529225b8] frames:4, duration:1.462000, fps:2.734245
12-30 12:08:37.780: I/SurfaceTextureClient(11691): [0x529225b8] frames:4, duration:1.495000, fps:2.674925
12-30 12:08:38.882: I/SurfaceTextureClient(11691): [0x529225b8] frames:3, duration:1.099000, fps:2.729083
12-30 12:08:40.204: I/SurfaceTextureClient(11691): [0x529225b8] frames:4, duration:1.259000, fps:3.176750
12-30 12:08:41.403: I/SurfaceTextureClient(11691): [0x529225b8] frames:4, duration:1.267000, fps:3.156914
12-30 12:08:42.486: I/SurfaceTextureClient(11691): [0x529225b8] frames:4, duration:1.072000, fps:3.729460
12-30 12:08:43.690: I/SurfaceTextureClient(11691): [0x529225b8] frames:5, duration:1.215000, fps:4.115116
12-30 12:08:44.736: I/SurfaceTextureClient(11691): [0x529225b8] frames:4, duration:1.046000, fps:3.823227
12-30 12:08:46.119: I/SurfaceTextureClient(11691): [0x529225b8] frames:5, duration:1.379000, fps:3.625341
12-30 12:08:47.287: I/SurfaceTextureClient(11691): [0x529225b8] frames:4, duration:1.176000, fps:3.399773
12-30 12:08:48.622: I/SurfaceTextureClient(11691): [0x529225b8] frames:4, duration:1.324000, fps:3.019432
12-30 12:08:49.734: I/SurfaceTextureClient(11691): [0x529225b8] frames:5, duration:1.119000, fps:4.465023
12-30 12:08:50.987: I/SurfaceTextureClient(11691): [0x529225b8] frames:4, duration:1.155000, fps:3.463197
12-30 12:08:52.023: I/SurfaceTextureClient(11691): [0x529225b8] frames:3, duration:1.140000, fps:2.629971
12-30 12:08:52.226: E/SQLiteLog(11691): (1) near "tablecontactsdisplay": syntax error
12-30 12:08:52.227: W/dalvikvm(11691): threadid=1: thread exiting with uncaught exception (group=0x416e4908)
12-30 12:08:52.255: E/AndroidRuntime(11691): FATAL EXCEPTION: main
12-30 12:08:52.255: E/AndroidRuntime(11691): android.database.sqlite.SQLiteException: near "tablecontactsdisplay": syntax error (code 1): , while compiling: Create tablecontactsdisplay(_idinteger primary key autoincrement,first nameTEXTlast nameTEXTmobileTEXTaddressTEXT);
12-30 12:08:52.255: E/AndroidRuntime(11691):    at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
12-30 12:08:52.255: E/AndroidRuntime(11691):    at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:882)
12-30 12:08:52.255: E/AndroidRuntime(11691):    at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:493)
12-30 12:08:52.255: E/AndroidRuntime(11691):    at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
12-30 12:08:52.255: E/AndroidRuntime(11691):    at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
12-30 12:08:52.255: E/AndroidRuntime(11691):    at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:31)
12-30 12:08:52.255: E/AndroidRuntime(11691):    at android.database.sqlite.SQLiteDatabase.executeSql(SQLiteDatabase.java:1663)
12-30 12:08:52.255: E/AndroidRuntime(11691):    at android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1594)
12-30 12:08:52.255: E/AndroidRuntime(11691):    at com.hossa.contactsapp.DBcreator.onCreate(DBcreator.java:45)
12-30 12:08:52.255: E/AndroidRuntime(11691):    at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:252)
12-30 12:08:52.255: E/AndroidRuntime(11691):    at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:164)
12-30 12:08:52.255: E/AndroidRuntime(11691):    at com.hossa.contactsapp.DBcreator.add(DBcreator.java:60)
12-30 12:08:52.255: E/AndroidRuntime(11691):    at com.hossa.contactsapp.CreateContact.onClick(CreateContact.java:50)
12-30 12:08:52.255: E/AndroidRuntime(11691):    at android.view.View.performClick(View.java:4093)
12-30 12:08:52.255: E/AndroidRuntime(11691):    at android.view.View$PerformClick.run(View.java:17149)
12-30 12:08:52.255: E/AndroidRuntime(11691):    at android.os.Handler.handleCallback(Handler.java:615)
12-30 12:08:52.255: E/AndroidRuntime(11691):    at android.os.Handler.dispatchMessage(Handler.java:92)
12-30 12:08:52.255: E/AndroidRuntime(11691):    at android.os.Looper.loop(Looper.java:153)
12-30 12:08:52.255: E/AndroidRuntime(11691):    at android.app.ActivityThread.main(ActivityThread.java:5006)
12-30 12:08:52.255: E/AndroidRuntime(11691):    at java.lang.reflect.Method.invokeNative(Native Method)
12-30 12:08:52.255: E/AndroidRuntime(11691):    at java.lang.reflect.Method.invoke(Method.java:511)
12-30 12:08:52.255: E/AndroidRuntime(11691):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:821)
12-30 12:08:52.255: E/AndroidRuntime(11691):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:584)
12-30 12:08:52.255: E/AndroidRuntime(11691):    at dalvik.system.NativeStart.main(Native Method)
12-30 12:08:54.208: I/Process(11691): Sending signal. PID: 11691 SIG: 9

Answer 1

在代碼中可以看到的一個問題是DATABASE_CREATE字符串。 Neead在單詞之間添加了一些空格和逗號：

public static final String DATABASE_CREATE = "Create table "
        + DATABASE_TABLE + "(" + KEY_ROWID
        + " integer primary key autoincrement," + KEY_FNAME + " TEXT,"
        + KEY_LNAME + " TEXT," + KEY_MOBILE + " TEXT," + KEY_ADDRESS + " TEXT);";

另一個問題是SQLiteDatabase的構造函數，未正確聲明

public SQLiteDatabase(Context context) {
    super(context, DATABASE_NAME, null, DATABASE_VERSION);
    // TODO Auto-generated constructor stub
}

Answer 2

12-29 14:02:33.748: E/AndroidRuntime(31505): java.lang.ClassCastException: com.hossa.contactsapp.CreateContact$1 cannot be cast to android.content.Context
12-29 14:02:33.748: E/AndroidRuntime(31505):    at com.hossa.contactsapp.SQLiteDatabase.<init>(SQLiteDatabase.java:35)

匿名內部類CreateContact$1不是Context 。

您不應該盲目地信任IDE的問題解決能力：

SQLiteDatabase addition = new SQLiteDatabase(this);

在這里，您應該傳遞一個Context 。 在Activity ，可以通過this但在OnClickListener ，它是指列表器，而不是活動。 使用CreateContact.this指父this是一個Context 。

然后，將傳遞給SQLiteDatabase構造函數的參數更改為Context並在此處刪除SQLiteDatabase轉換：

public SQLiteDatabase(OnClickListener onClickListener) {
    super((Context) onClickListener,

重命名數據庫類也是一個好主意，因為Android已經具有相同名稱的類。

---

更新：現在您在這里有SQL語法錯誤：

Create tablecontactsdisplay(_idinteger primary key autoincrement,first nameTEXTlast nameTEXTmobileTEXTaddressTEXT);

您需要在標識符和關鍵字之間使用空格，並且標識符需要刪除其空格或用引號將整個標識符引起來。 也有缺失,逗號。 例如

Create table contactsdisplay(_id integer primary key autoincrement,`first name` TEXT, `last name` TEXT, mobile TEXT, address TEXT);

Answer 3

您的問題似乎在這一行： SQLiteDatabase addition = new SQLiteDatabase(this); 在這種情況下， this是指onClickListener的實例，如果您需要引用活動的實例，則不是上下文的實例，應使用CreateContact.this

Answer 4

實現接口OnClickListener而不是將其用作“ inner ”，然后在那里進行工作。

代替這個：

Create.setOnClickListener(new OnClickListener() {

    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        SQLiteDatabase addition = new SQLiteDatabase(CreateContact.this);
        // her you ADD (put) the new data to the SQLite//
        String fname = editfirst.getEditableText().toString();
        String lname = editlast.getEditableText().toString();
        String mob = editmobile.getEditableText().toString();
        String address = editaddress.getEditableText().toString();

        addition.add(fname, lname, mob, address);
        addition.close();
        // go back to the main activity after changes took place//
        Intent k = new Intent(CreateContact.this, MainActivity.class);
        startActivity(k);
    }
});

這樣做： Create.setOnClickListener(this);

public class CreateContact extends Activity implements View.OnClickListener {

 //etc... etc..

 @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        SQLiteDatabase addition = new SQLiteDatabase(this);
        // her you ADD (put) the new data to the SQLite//
        String fname = editfirst.getEditableText().toString();
        String lname = editlast.getEditableText().toString();
        String mob = editmobile.getEditableText().toString();
        String address = editaddress.getEditableText().toString();

        addition.add(fname, lname, mob, address);
        addition.close();
        // go back to the main activity after changes took place//
        Intent k = new Intent(CreateContact.this, MainActivity.class);
        startActivity(k);
    }

}

編輯

您的數據庫架構錯誤，logcat表示存在語法錯誤，它應如下所示：

private static final String DATABASE_CREATE =
        "CREATE TABLE "
                + DATABASE_TABLE + "( "
                + KEY_ROWID + " INTEGER PRIMARY KEY,"
                + KEY_FNAME + " TEXT,"
                + KEY_LNAME + " TEXT,"
                + KEY_MOBILE + " TEXT,"
                + KEY_ADDRESS + " TEXT)";

您忘了用逗號分隔每個鍵。

Answer 5

謝謝幫手，我剛剛發現這些類在實現我刪除的另一個類

所以我改變了這個

   @Override
public void onCreate(android.database.sqlite.SQLiteDatabase db) {
// TODO Auto-generated method stub
db.execSQL(DATABASE_CREATE);// this orders the code to create the
                            // database//
}

對此

  @Override
public void onCreate(SQLiteDatabase db) {
    // TODO Auto-generated method stub
    db.execSQL(DATABASE_CREATE);// this orders the code to create the
                                // database//

}

您會看到我的舊類稱為SQLitedatabase，因此我遵循了@laalto和@ramaral建議並更改了一些內容:)

謝謝你們