SQLite数据库不插入数据Android [重复]答案

【问题标题】：SQLite database not inserting data Android [duplicate]SQLite数据库不插入数据Android [重复]
【发布时间】：2016-03-04 23:52:02
【问题描述】：

我正在尝试按照此链接中的说明进行操作：http://www.androiddesignpatterns.com/2012/05/correctly-managing-your-sqlite-database.html 在方法＃1下从不同的活动中访问我的数据库。但是数据没有被插入，我收到了几个错误。

我用来插入数据的主类：

import android.content.Intent;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class newCharacter extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_new_character);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        Button submit_button = (Button) findViewById(R.id.char_submit);

        DatabaseHelper.getInstance(getApplicationContext());


        EditText name_text = (EditText) findViewById(R.id.nameText);
        EditText health_text = (EditText) findViewById(R.id.editText);
        EditText strength_text = (EditText) findViewById(R.id.editText2);
        EditText agility_text = (EditText) findViewById(R.id.editText3);
        EditText intelligence_text = (EditText) findViewById(R.id.editText4);
        EditText charisma_text = (EditText) findViewById(R.id.editText5);
        EditText endurance_text = (EditText) findViewById(R.id.editText6);
        EditText carry_weight_text = (EditText) findViewById(R.id.editText7);
        EditText zprep_text = (EditText) findViewById(R.id.editText8);
        EditText inventory_text = (EditText) findViewById(R.id.editText9);

        final String name = name_text.toString();
        final String health = health_text.toString();
        final String strength = strength_text.toString();
        final String agility = agility_text.toString();
        final String intelligence = intelligence_text.toString();
        final String charisma = charisma_text.toString();
        final String endurance = endurance_text.toString();
        final String carryweight = carry_weight_text.toString();
        final String zprep = zprep_text.toString();
        final String inventory = inventory_text.toString();

        submit_button.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {

               ERROR HERE boolean isInserted = DatabaseHelper.getInstance(getApplicationContext()).insertData(name, health, strength,
                        endurance, carryweight, agility, intelligence, charisma, zprep, inventory);

                if (isInserted == true)
                    Toast.makeText(newCharacter.this, "Data Inserted", Toast.LENGTH_LONG).show();
                else
                    Toast.makeText(newCharacter.this, "Data NOT Inserted", Toast.LENGTH_LONG).show();



            }

        });
    }

}

我的数据库助手：

import android.content.ContentValues;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

/**
 * Created by Matt on 11/23/2015.
 */
public class DatabaseHelper extends SQLiteOpenHelper {

    private static DatabaseHelper sInstance;

    public static final String DATABASE_NAME = "character_info.db";
    public static final String TABLE_NAME = "characters_table";
    public static final String COL_1 = "NAME";
    public static final String COL_3 = "HEALTH";
    public static final String COL_2 = "STRENGTH";
    public static final String COL_4 = "ENDURANCE";
    public static final String COL_5 = "CARRY_WEIGHT";
    public static final String COL_6 = "AGILITY";
    public static final String COL_7 = "INTELLIGENCE";
    public static final String COL_8 = "CHARISMA";
    public static final String COL_9 = "ZPREP";
    public static final String COL_10 = "INVENTORY";

    public static synchronized DatabaseHelper getInstance(Context context) {

        if (sInstance == null) {
            sInstance = new DatabaseHelper(context.getApplicationContext());
        }
        return sInstance;
    }

    private DatabaseHelper(Context context) {
        super(context, DATABASE_NAME, null, 1);

    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        String SQL_String = "create table " + TABLE_NAME +" (NAME TEXT PRIMARY KEY, HEALTH TEXT, STRENGTH TEXT" +
                ", ENDURANCE TEXT, CARRY_WEIGHT TEXT, AGILITY TEXT, INTELLIGENCE TEXT, CHARISMA TEXT, ZPREP TEXT, INVENTORY TEXT)";

        db.execSQL(SQL_String);

    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        db.execSQL("DROP TABLE IF EXISTS "+TABLE_NAME);
        onCreate(db);
    }

    public boolean insertData(String name, String health, String strength, String endurance, String carryweight,
                              String agility, String intelligence, String charisma, String zprep, String inventory) {
        SQLiteDatabase db = this.getWritableDatabase();
        ContentValues contentValues = new ContentValues();
        contentValues.put(COL_1, name);
        contentValues.put(COL_2, health);
        contentValues.put(COL_3, strength);
        contentValues.put(COL_4, endurance);
        contentValues.put(COL_5, carryweight);
        contentValues.put(COL_6, agility);
        contentValues.put(COL_7, intelligence);
        contentValues.put(COL_8, charisma);
        contentValues.put(COL_9, zprep);
        contentValues.put(COL_10, inventory);
        ERROR HERE: long result = db.insert(TABLE_NAME, null, contentValues);

        if (result == -1)
            return false;
        else
            return true;

    }
}

日志猫：

12-01 01:05:45.049 274-274/proctor.csit.project E/Database: Error inserting INVENTORY=android.support.v7.widget.AppCompatEditText@45f78508 INTELLIGENCE=android.support.v7.widget.AppCompatEditText@45f9e0f0 CHARISMA=android.support.v7.widget.AppCompatEditText@45f7ab58 NAME=android.support.v7.widget.AppCompatEditText@45f663f0 ZPREP=android.support.v7.widget.AppCompatEditText@45f7ed60 HEALTH=android.support.v7.widget.AppCompatEditText@45f8dfd0 CARRY_WEIGHT=android.support.v7.widget.AppCompatEditText@45f634f0 ENDURANCE=android.support.v7.widget.AppCompatEditText@45f8ef60 STRENGTH=android.support.v7.widget.AppCompatEditText@45f7dda8 AGILITY=android.support.v7.widget.AppCompatEditText@45f9db10
12-01 01:05:45.049 274-274/proctor.csit.project E/Database: android.database.sqlite.SQLiteException: table characters_table has no column named INVENTORY: , while compiling: INSERT INTO characters_table(INVENTORY, INTELLIGENCE, CHARISMA, NAME, ZPREP, HEALTH, CARRY_WEIGHT, ENDURANCE, STRENGTH, AGILITY) VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?);
12-01 01:05:45.049 274-274/proctor.csit.project E/Database:     at android.database.sqlite.SQLiteCompiledSql.native_compile(Native Method)
12-01 01:05:45.049 274-274/proctor.csit.project E/Database:     at android.database.sqlite.SQLiteCompiledSql.compile(SQLiteCompiledSql.java:91)
12-01 01:05:45.049 274-274/proctor.csit.project E/Database:     at android.database.sqlite.SQLiteCompiledSql.<init>(SQLiteCompiledSql.java:64)
12-01 01:05:45.049 274-274/proctor.csit.project E/Database:     at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:80)
12-01 01:05:45.049 274-274/proctor.csit.project E/Database:     at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:36)
12-01 01:05:45.049 274-274/proctor.csit.project E/Database:     at android.database.sqlite.SQLiteDatabase.compileStatement(SQLiteDatabase.java:1145)
12-01 01:05:45.049 274-274/proctor.csit.project E/Database:     at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1536)
12-01 01:05:45.049 274-274/proctor.csit.project E/Database:     at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1410)
12-01 01:05:45.049 274-274/proctor.csit.project E/Database:     at proctor.csit.project.DatabaseHelper.insertData(DatabaseHelper.java:70)
12-01 01:05:45.049 274-274/proctor.csit.project E/Database:     at proctor.csit.project.newCharacter$1.onClick(newCharacter.java:55)
12-01 01:05:45.049 274-274/proctor.csit.project E/Database:     at android.view.View.performClick(View.java:2408)
12-01 01:05:45.049 274-274/proctor.csit.project E/Database:     at android.view.View$PerformClick.run(View.java:8816)
12-01 01:05:45.049 274-274/proctor.csit.project E/Database:     at android.os.Handler.handleCallback(Handler.java:587)
12-01 01:05:45.049 274-274/proctor.csit.project E/Database:     at android.os.Handler.dispatchMessage(Handler.java:92)
12-01 01:05:45.049 274-274/proctor.csit.project E/Database:     at android.os.Looper.loop(Looper.java:123)
12-01 01:05:45.049 274-274/proctor.csit.project E/Database:     at android.app.ActivityThread.main(ActivityThread.java:4627)
12-01 01:05:45.049 274-274/proctor.csit.project E/Database:     at java.lang.reflect.Method.invokeNative(Native Method)
12-01 01:05:45.049 274-274/proctor.csit.project E/Database:     at java.lang.reflect.Method.invoke(Method.java:521)
12-01 01:05:45.049 274-274/proctor.csit.project E/Database:     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
12-01 01:05:45.049 274-274/proctor.csit.project E/Database:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
12-01 01:05:45.049 274-274/proctor.csit.project E/Database:     at dalvik.system.NativeStart.main(Native Method)

我已经在我的 java 代码中明显的错误旁边添加了注释。我第一次使用 sqlite，对此我很迷茫，因此感谢您的帮助！

【问题讨论】：

您最近添加了INVENTORY 列吗？
转到设置然后转到应用程序，然后转到all 选项卡，然后在单击清除数据后选择您的应用程序，然后尝试再次运行应用程序它应该可以工作
@M D mmm 是的，我想，我本来打算添加它，但忘记了，所以我前一阵子不得不实现它。
那么您应该uninstall您的应用程序并再次安装一个全新的.apk 构建。
@Matt 您需要将问题的标题从使用单例时不插入数据更改为不插入数据。这个问题与使用单例 sqliteopenhelper 类无关

标签： java android sqlite android-studio singleton

【解决方案1】：

当您更改数据库架构时，您需要增加版本号并在onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) 中实施升级。在您的情况下，它可能看起来像这样：

private static final int VERSION = 2; // increased from 1

private DatabaseHelper(Context context) {
    super(context, DATABASE_NAME, null, VERSION);
}

...

@Override
public void onUpdgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
    switch (oldVersion) {
        case 1:
            db.execSQL("ALTER TABLE " + TABLE_NAME + " ADD COLUMN INVENTORY TEXT");
        // intentionally fall through to other cases
    }
}

这支持用户下载您的应用更新并且他们的数据库具有过期架构的情况。

如果您的应用尚未发布，您可以不按照我上面写的操作更改架构，然后简单地清除应用数据（或卸载并重新安装，具有相同的效果）。这将导致您的数据库被重新创建，因此它将再次执行 CREATE sql。

【讨论】：

【解决方案2】：

转到设置然后转到应用程序，然后转到所有选项卡，然后选择您的应用程序，然后单击清除数据，然后尝试再次运行该应用程序它应该可以工作。

发生此错误是因为在添加库存表后未调用 sqliteopenhelper 类的 onCreate。当已经存在同名的数据库时，不会调用 Sqliteopenheler 的 onCreate。 onUpgrade 也不会被调用，因为您没有在 sqliteopenhelper 中增加版本号，因此您的表清单没有创建，因此您会收到错误。

所以通常如果您的应用程序仍在开发中，并且您是唯一的开发人员，那么您可以做的只是清除应用程序的数据，这将删除所有数据（包括您的数据库），因此当您运行时应用程序将再次调用 onCreate。但是如果你的应用在生产中，你需要增加应用的版本号并将升级逻辑的代码放在onUpgrade中

【讨论】：

抱歉，文件下的设置菜单对吗？我没有看到一个或多个应用程序选项

【解决方案3】：

如果您最近添加了inventory 列，则从您使用的手机或模拟器中卸载该应用并尝试新的！

【讨论】：