使用storm gen for Android时，如何访问底层SQLite数据库？_Android_Android Sqlite_Storm Gen

使用storm gen for Android时，如何访问底层SQLite数据库？

android

使用storm gen for Android时，如何访问底层SQLite数据库？,android,android-sqlite,storm-gen,Android,Android Sqlite,Storm Gen,我正在使用Android SQLite的ORM，希望运行一个原始SQL查询。如何访问基础SQLite数据库类？您可以通过DatabaseHelper类访问基础SQLite数据库，该类可从生成的DAO获得： ContactDao dao = new ContactDao(this); SQLiteDatabase db = dao.getDbHelper(this).getReadableDatabase(); // SELECT DISTINCT Locale FROM PALABRA Curs

我正在使用Android SQLite的ORM，希望运行一个原始SQL查询。如何访问基础SQLite数据库类？

您可以通过DatabaseHelper类访问基础SQLite数据库，该类可从生成的DAO获得：

ContactDao dao = new ContactDao(this);
SQLiteDatabase db = dao.getDbHelper(this).getReadableDatabase();
// SELECT DISTINCT Locale FROM PALABRA
Cursor c = db.query(...);

您还可以在DatabaseHelper类上调用getWriteableDatabase（），这样做是安全的，因为storm gen使用基础SQLite数据库的单一实例。

您可以通过DatabaseHelper类访问基础SQLite数据库，该类可从生成的DAO获得：

ContactDao dao = new ContactDao(this);
SQLiteDatabase db = dao.getDbHelper(this).getReadableDatabase();
// SELECT DISTINCT Locale FROM PALABRA
Cursor c = db.query(...);

您还可以调用getWriteableDatabase（）在DatabaseHelper类上，这样做是安全的，因为storm gen使用基础SQLiteDatabase的单例实例。

参考David的回答，在Android studio项目中设置storm gen lib以使gradle文件工作，从而使注释生成为暴风发电机

如果你想使用android studio和storm gen运行helloworld程序，请考虑一下

代码：

import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.os.Build;

import com.example.stormtestlib.Person;
import com.example.stormtestlib.TestingDB;

public class MainActivity extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        if (savedInstanceState == null) {
            getSupportFragmentManager().beginTransaction()
                    .add(R.id.container, new PlaceholderFragment())
                    .commit();
        }
        TestingDB tt = TestingDB.getInstance(this);
        Person p = tt.getPerson(this);
        p.setMyString("blah blah");
        tt.savePerson(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 boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        switch (item.getItemId()) {
            case R.id.action_settings:
                return true;
        }
        return super.onOptionsItemSelected(item);
    }

    /**
* A placeholder fragment containing a simple view.
*/
    public static class PlaceholderFragment extends Fragment {

        public PlaceholderFragment() {
        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                Bundle savedInstanceState) {
            View rootView = inflater.inflate(R.layout.fragment_main, container, false);
            return rootView;
        }
    }

}

资料来源：信贷：Maia

更新：

import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.os.Build;

import com.example.stormtestlib.Person;
import com.example.stormtestlib.TestingDB;

public class MainActivity extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        if (savedInstanceState == null) {
            getSupportFragmentManager().beginTransaction()
                    .add(R.id.container, new PlaceholderFragment())
                    .commit();
        }
        TestingDB tt = TestingDB.getInstance(this);
        Person p = tt.getPerson(this);
        p.setMyString("blah blah");
        tt.savePerson(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 boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        switch (item.getItemId()) {
            case R.id.action_settings:
                return true;
        }
        return super.onOptionsItemSelected(item);
    }

    /**
* A placeholder fragment containing a simple view.
*/
    public static class PlaceholderFragment extends Fragment {

        public PlaceholderFragment() {
        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                Bundle savedInstanceState) {
            View rootView = inflater.inflate(R.layout.fragment_main, container, false);
            return rootView;
        }
    }

}

storm gen刚刚被推到。不，我们可以将它与Gradle一起使用

// Top-level build.gradle 

buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:0.11.+'
        classpath 'com.neenbedankt.gradle.plugins:android-apt:1.3'
    }
}

allprojects {
    repositories {
        mavenCentral()
    }
}

// app module build.gradle

apply plugin: 'android'
apply plugin: 'android-apt'

android {
    compileSdkVersion 19
    buildToolsVersion "19.1.0"

    defaultConfig {
        applicationId "com.turbomanage.storm.sample"
        minSdkVersion 10
        targetSdkVersion 19
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            runProguard false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    apt 'com.turbomanage.storm:storm-impl:0.98'
    compile 'com.android.support:appcompat-v7:19.1.0'
    compile 'com.android.support:support-v4:19.1.0'
    compile 'com.turbomanage.storm:storm-api:0.98'
}

信贷：Galex

参考David的回答，在Android studio项目中设置storm gen库以使gradle文件正常工作，从而为storm-gen生成注释时，您可能会遇到麻烦