[英]SQLite file opener Android Studio
I have just started an Android studio project, I have written some code to create a table within SQLite.我刚刚开始了一个 Android Studio 项目,我编写了一些代码来在 SQLite 中创建一个表。
There is no easy UI for the database so I tried to install the plugin DB Navigator.数据库没有简单的用户界面,所以我尝试安装插件 DB Navigator。 This requires I link the navigator to my database but cant find where the file will be created.这需要我将导航器链接到我的数据库,但无法找到文件的创建位置。
A lot of answers seen to be go to /data/data/ but I can't find these folders in my directory.很多答案都显示在 /data/data/ 中,但我在我的目录中找不到这些文件夹。
Any idea of how to pin point my SQLite database?知道如何确定我的 SQLite 数据库吗? Any help is greatly appreciated.任何帮助是极大的赞赏。
SQLiteController.java SQLiteController.java
package com.example.apexstrength;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import static java.sql.Types.NULL;
public class SQLiteController extends SQLiteOpenHelper { //abstract to prevent creating/dropping tables
private static final int DATABASE_VERSION=1;
private static final String DATABASE_NAME="ApexStrength";
private static final String TABLE_USER="user";
private static final String KEY_userName="userName",KEY_password="password", KEY_firstName="firstName",KEY_surname="surname", KEY_EMAIL="email";
public SQLiteController(Context context)
{
super(context,DATABASE_NAME,null,DATABASE_VERSION);
}
public void addUser( String userName, String password, String firstName, String surname, String email)
{
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(KEY_userName, userName);
values.put(KEY_password, password);
values.put(KEY_firstName, firstName);
values.put(KEY_surname, surname);
values.put(KEY_EMAIL, email);
//inserting rows
db.insert(TABLE_USER, null, values);
db.close();
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("CREATE TABLE IF NOT EXISTS user (username VARCHAR, password VARCHAR, firstName VARCHAR, surname VARCHAR, email VARCHAR)"); //Create table is not there.
// db.execSQL("CREATE TABLE IF NOT EXISTS exercise (username VARCHAR, password VARCHAR, firstName VARCHAR, surname VARCHAR, email VARCHAR)");
// db.execSQL("CREATE TABLE IF NOT EXISTS workout (username VARCHAR, password VARCHAR, firstName VARCHAR, surname VARCHAR, email VARCHAR)");
// db.execSQL("CREATE TABLE IF NOT EXISTS sets (username VARCHAR, password VARCHAR, firstName VARCHAR, surname VARCHAR, email VARCHAR)");
}
public boolean logIn(String username, String password) {
SQLiteDatabase db = this.getReadableDatabase();
Cursor c = db.rawQuery("select * from user where username=? and password=?", new String[]{username,password});
if(c.getCount()>0)
{
return true;
}
return false;
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
}
signUp.java注册.java
package com.example.apexstrength;
import androidx.appcompat.app.AppCompatActivity;
import android.app.DownloadManager;
import android.content.Intent;
import android.app.Fragment;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class signUp extends AppCompatActivity {
private SQLiteController db;
public void register(View view) {
EditText user = (EditText) findViewById(R.id.passwordReg);
EditText pass = (EditText) findViewById(R.id.userReg);
EditText first = (EditText) findViewById(R.id.firstNameReg);
EditText sur = (EditText) findViewById(R.id.surnameReg);
EditText email = (EditText) findViewById(R.id.emailReg);
String username = user.getText().toString();
String password = pass.getText().toString();
String firstname = first.getText().toString();
String surname = sur.getText().toString();
String emailAddress = email.getText().toString();
if (!username.isEmpty() && !password.isEmpty() && !firstname.isEmpty() && !surname.isEmpty() && !emailAddress.isEmpty()) {
db.addUser(username, password, firstname, surname, emailAddress);
Toast.makeText(getApplicationContext(), emailAddress+ " has been registered!", Toast.LENGTH_LONG).show();
Intent i = new Intent(getApplicationContext(), MainActivity.class);
startActivity(i);
} else {
Toast.makeText(getApplicationContext(), "Please enter your details", Toast.LENGTH_LONG).show();
}
}
public boolean onCreateOptionsMenu(Menu menu) //Creating options menu
{
MenuInflater menuInflater = getMenuInflater();
menuInflater.inflate(R.menu.main_menu, menu);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
super.onOptionsItemSelected(item);
switch (item.getItemId()) {
//Selected items, log selected
case R.id.home:
Log.i("Menu item selected", "Home");
Intent intent = new Intent(this, MainActivity.class);
startActivity(intent);
return true;
case R.id.settings:
Log.i("Menu item selected", "Settings");
return true;
case R.id.help:
Log.i("Menu item selected", "Help");
return true;
case R.id.weightConversion:
Log.i("Menu item selected", "Weight Conversion");
intent = new Intent(this, weightConversion.class);
startActivity(intent);
return true;
default:
return false;
}
}
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sign_up);
db= new SQLiteController(getApplicationContext());
}}
In Android you can use Device Explorer (bottom right by default or via View / Tool Windows / Device Explorer)在 Android 中,您可以使用设备资源管理器(默认右下角或通过视图/工具窗口/设备资源管理器)
and then something along the lines of :-然后是:-
You can then right click the database and use Save As or Copy Path然后您可以右键单击数据库并使用另存为或复制路径
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