Question

我找不到在我的应用程序中创建的数据库我在这里看了其他类似的问题，我知道这可能是因为我没有root权限但是，我在手机上找不到实际的app文件夹在模拟器上的调试模式下它是数据，但是当我安装apk时，我无法在手机上看到它当我按下Buttons时它没有出错，因此我假设db正在创建并可用。

问题是：有没有办法移动创建数据库的位置，以便我可以看到它还有什么更好的方法来增加数据库的数量？

package com.example.a2618436.customersatsifaction;

/**
 * Created by 2618436 on 06/05/2016.

 */
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.content.Context;
import android.content.ContentValues;
import android.database.Cursor;

public class MyDBHandler extends SQLiteOpenHelper {

    private static final int DATABASE_VERSION = 1;
    private static final String DATABASE_NAME = "SurveyDB.db";
    private static final String  TABLE_SURVEY = "Survey";

    public static final String KEY_ID= "id";
    public static final String KEY_HAPPY = "happy";
    public static final String KEY_SAD = "sad";

    public MyDBHandler(Context context, String name,
                       SQLiteDatabase.CursorFactory factory, int version) {
        super(context, DATABASE_NAME, factory, DATABASE_VERSION);
    }

    public void onCreate(SQLiteDatabase db){
        String CREATE_SURVEY_TABLE = "CREATE TABLE " +
                TABLE_SURVEY + "("
                + KEY_ID + " INTEGER PRIMARY KEY," + KEY_HAPPY
                + " INTEGER," + KEY_SAD + " INTEGER" + ")";
        db.execSQL(CREATE_SURVEY_TABLE);
    }

    //

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

    }
    //needs revision
    public void addSurvey(MainActivity mainactivity) {
        SQLiteDatabase db = this.getWritableDatabase();

        ContentValues values = new ContentValues();
        values.put(KEY_HAPPY, mainactivity.getHappy()); // Contact Name
        values.put(KEY_SAD, mainactivity.getSad()); // Contact Phone Number

        // Inserting Row
        db.insert(TABLE_SURVEY, null, values);
        db.close(); // Closing database connection
    }
}

数据库处理程序。

package com.example.a2618436.customersatsifaction;

/**
 * Created by 2618436 on 06/05/2016.

 */
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.content.Context;
import android.content.ContentValues;
import android.database.Cursor;

public class MyDBHandler extends SQLiteOpenHelper {

    private static final int DATABASE_VERSION = 1;
    private static final String DATABASE_NAME = "SurveyDB.db";
    private static final String  TABLE_SURVEY = "Survey";

    public static final String KEY_ID= "id";
    public static final String KEY_HAPPY = "happy";
    public static final String KEY_SAD = "sad";

    public MyDBHandler(Context context, String name,
                       SQLiteDatabase.CursorFactory factory, int version) {
        super(context, DATABASE_NAME, factory, DATABASE_VERSION);
    }

    public void onCreate(SQLiteDatabase db){
        String CREATE_SURVEY_TABLE = "CREATE TABLE " +
                TABLE_SURVEY + "("
                + KEY_ID + " INTEGER PRIMARY KEY," + KEY_HAPPY
                + " INTEGER," + KEY_SAD + " INTEGER" + ")";
        db.execSQL(CREATE_SURVEY_TABLE);
    }

    //

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

        }
        //needs revision
        public void addSurvey(MainActivity mainactivity) {
            SQLiteDatabase db = this.getWritableDatabase();

            ContentValues values = new ContentValues();
            values.put(KEY_HAPPY, mainactivity.getHappy()); // Contact Name
            values.put(KEY_SAD, mainactivity.getSad()); // Contact Phone Number

            // Inserting Row
            db.insert(TABLE_SURVEY, null, values);
            db.close(); // Closing database connection
        }
    }

Answer 1

如果你正在编写数据库操作，你应该有一个root设备，或者你可以为此尝试Genymotion（pre rooted）。你可以看到你的db文件/data/data/com.yourpackage.com/databases/yourdb.db。你可以很容易地看到db有数据吗？安装RootExplorer app。

移动数据库的位置

1 个答案: