数据库选型框架
整理常用的数据库框架对比
- Ormlite
- GreenDao
- Sugar
- Realm
- Sqlbrite
1.接入数据库：ormlite
gradle配置
compile 'com.j256.ormlite:ormlite-android:5.0'
工具类
public class DatabaseHelper extends OrmLiteSqliteOpenHelper {
private static final String TAG = DatabaseHelper.class.getSimpleName();
public static final String DB_NAME = "autotest.db";
private static final int DB_VERSION = 2;
private static DatabaseHelper instance;
public static synchronized DatabaseHelper getHelper() {
if (instance == null) {
synchronized (DatabaseHelper.class) {
if (instance == null) {
instance = new DatabaseHelper(MyApplication.application);
}
}
}
return instance;
}
private DatabaseHelper(Context context) {
// super(context, DB_NAME, context.getPackageName(), null, DB_VERSION, R.raw.ormlite_config);
super(context, DB_NAME, null, DB_VERSION);
}
@Override
public void onCreate(SQLiteDatabase database, ConnectionSource connectionSource) {
try {
TableUtils.createTable(connectionSource, Repo.class);
} catch (Exception e) {
Log.e(TAG, "onCreate.. exception: "+e);
}
}
@Override
public void onUpgrade(SQLiteDatabase database, ConnectionSource connectionSource, int oldVersion, int newVersion) {
try {
TableUtils.dropTable(connectionSource, Repo.class, true);
onCreate(database, connectionSource);
} catch (SQLException e) {
Log.e(TAG, "onCreate.. exception: "+e);
}
}
/**
* 释放资源
*/
@Override
public void close() {
super.close();
}
}
实体类需要注解：
@DatabaseTable(tableName = "tb_repo")
public class Repo implements Serializable {
@DatabaseField(generatedId = true)
public long keyid;
@DatabaseField(columnName = "id")
public long id;
@DatabaseField(columnName = "name")
public String name;
public Repo(){}
public long getId() {
return id;
}
public String getName() {
return name;
}
}
代码调用：
//删除所有数据
TableUtils.clearTable(DatabaseHelper.getHelper().getConnectionSource(), Repo.class);
long currtime=System.currentTimeMillis();
final Dao<Repo, String> simpleDao= DatabaseHelper.getHelper().getDao(Repo.class);
//插入100000条数据
simpleDao.callBatchTasks(new Callable<Void>() {
public Void call() throws Exception {
for (Repo t : list) {
simpleDao.create(t);
}
return null;
}
});
long endtime=System.currentTimeMillis();
//查询100000条数据
List<Repo> list= simpleDao.queryForAll();
long endtime1=System.currentTimeMillis();
Log.d(TAG,"db:ormlite=,time="+(endtime-currtime)+",转化list="+(endtime1-endtime)+",ps:size="+list.size());
}catch (Exception e){
Log.d(TAG,"db:ormlite="+e.getMessage());
}
2.接入数据库：greenDAO
Add the following Gradle configuration to your Android project:
// In your root build.gradle file:
buildscript {
repositories {
jcenter()
mavenCentral() // add repository
}
dependencies {
classpath 'com.android.tools.build:gradle:2.3.1'
classpath 'org.greenrobot:greendao-gradle-plugin:3.2.2' // add plugin
}
}
// In your app projects build.gradle file:
apply plugin: 'com.android.application'
apply plugin: 'org.greenrobot.greendao' // apply plugin
dependencies {
compile 'org.greenrobot:greendao:3.2.2' // add library
}
实体类：RepoGreen
@Entity(indexes = {
@Index(value = "id,name DESC" , unique = true)
})
public class RepoGreen {
@Id
public long keyid;
@NotNull
public long id;
@NotNull
public String name;
public RepoGreen(){}
@Generated(hash = 1374277050)
public RepoGreen(long keyid, long id, @NotNull String name) {
this.keyid = keyid;
this.id = id;
this.name = name;
}
public long getId() {
return id;
}
public String getName() {
return name;
}
public long getKeyid() {
return this.keyid;
}
public void setKeyid(long keyid) {
this.keyid = keyid;
}
public void setId(long id) {
this.id = id;
}
public void setName(String name) {
this.name = name;
}
}
调用数据库
DaoMaster.DevOpenHelper helper = new DaoMaster.DevOpenHelper(DbActivity.this, "notes-db");
Database db = helper.getWritableDb();
DaoSession daoSession = new DaoMaster(db).newSession();
RepoGreenDao noteDao = daoSession.getRepoGreenDao();
增删查
//删除所有数据
noteDao.deleteAll();
//插入数据
noteDao.insertInTx(Addlist);
//查询条数据
List<RepoGreen> list=queryList.list();
3. 接入数据库：sugar
gradle配置：
//sugar数据库
compile 'com.github.satyan:sugar:1.5'
出现问题：
E:\AndroidDeveloper\AndroidProject\git\Call\Automatic\AutoFramework\src\main\AndroidManifest.xml:13:9-36 Error:
Attribute application@allowBackup value=(false) from AndroidManifest.xml:13:9-36
is also present at [com.github.satyan:sugar:1.3] AndroidManifest.xml:12:9-35 value=(true).
Suggestion: add 'tools:replace="android:allowBackup"' to <application> element at AndroidManifest.xml:11:5-36:19 to override.
E:\AndroidDeveloper\AndroidProject\git\Call\Automatic\AutoFramework\src\main\AndroidManifest.xml:14:9-43 Error:
Attribute application@icon value=(@mipmap/ic_launcher) from AndroidManifest.xml:14:9-43
is also present at [com.github.satyan:sugar:1.3] AndroidManifest.xml:13:9-45 value=(@drawable/ic_launcher).
Suggestion: add 'tools:replace="android:icon"' to <application> element at AndroidManifest.xml:11:5-36:19 to override.
解决问题：
AndroidManifest配置修改：
xmlns:tools="http://schemas.android.com/tools" 这个必须添加
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="com.doublechina.autoimageload">
tools:replace="android:allowBackup,android:icon" 这个必须添加
<application
android:name=".MyApplication"
android:allowBackup="false"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
tools:replace="android:allowBackup,android:icon"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".ImageActivity">
Application子节点添加：
<meta-data android:name="DATABASE" android:value="sugar_example.db" />
<meta-data android:name="VERSION" android:value="2" />
<meta-data android:name="QUERY_LOG" android:value="true" />
<meta-data android:name="DOMAIN_PACKAGE_NAME" android:value="com.doublechina.autoimageload.entity" />
实体类：
public class RepoSugar extends SugarRecord{
public long keyid;
public long id;
public String name;
public RepoSugar(long keyid, long id, String name) {
this.keyid = keyid;
this.id = id;
this.name = name;
}
}
问题2：
no such table: REPO_SUGAR
解决方案：
2.1以上需要禁用Instant Run
4.数据库：realm 接入使用
Step 1: Add the class path dependency to the project level build.gradle file.
buildscript {
repositories {
jcenter()
}
dependencies {
classpath "io.realm:realm-gradle-plugin:3.1.3"
}
}
Step 2: Apply the realm-android plugin to the top of the application level build.gradle file.
apply plugin: 'realm-android'
Step 3:Entity
public class RepoRealm extends RealmObject {
@Ignore
public long keyid;
public long id;
public String name;
public RepoRealm(){}
public RepoRealm(long keyid, long id, String name) {
this.keyid = keyid;
this.id = id;
this.name = name;
}
}
Step 4:代码调用
//初始化 Realm
Realm.init(DbActivity.this);
Realm realm = Realm.getDefaultInstance();
//删除所有数据
realm.beginTransaction();
realm.deleteAll();
realm.commitTransaction();
List<RepoRealm> addList=getRealmData();
long currtime=System.currentTimeMillis();
//插入十万条数据
realm.beginTransaction();
realm.insertOrUpdate(addList);
realm.commitTransaction();
long endtime=System.currentTimeMillis();
//查询十万条数据
RealmQuery<RepoRealm> query = realm.where(RepoRealm.class);
List<RepoRealm> list= query.findAll();
long endtime1=System.currentTimeMillis();
String value="db:Realm=,time="+(endtime-currtime)+",转化list="+(endtime1-endtime)+",ps:size="+list.size();
更多请参考官方api:realm
5.数据库：sqlbrite 接入使用
sqlbrite响应式数据库，执行原生的数据库操作
gradle配置
dependencies {
//sqlbrite
compile 'com.squareup.sqlbrite:sqlbrite:1.1.1'
}
工具类
public class DBHelper extends SQLiteOpenHelper {
private static final String DBNAME = "sqlbrite.db";
private static final int CURRENTVERSION = 1;
public static final String USERTABLE = "repoSqlbriteTable";
public DBHelper(Context context) {
super(context, DBNAME, null, CURRENTVERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("create table if not exists " + USERTABLE + " ( _id integer primary key, idtest,name);");
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
}
代码调用
//初始化 Realm
SqlBrite sqlBrite = new SqlBrite.Builder().build();
DBHelper openHelper = new DBHelper(DbActivity.this);
BriteDatabase db = sqlBrite.wrapDatabaseHelper(openHelper, Schedulers.io());
//删除所有数据
db.delete(DBHelper.USERTABLE,null);
final long currtime=System.currentTimeMillis();
//插入十万条数据
for (int i=0;i<totalLength;i++){
ContentValues values = new ContentValues();
values.put("IDTest", i);
values.put("NAME", "doublechina");
db.insert(DBHelper.USERTABLE, values);
}
final long endtime=System.currentTimeMillis();
//查询十万条数据
QueryObservable query = db.createQuery(DBHelper.USERTABLE, "SELECT * FROM " + DBHelper.USERTABLE,null);
query.subscribe(new Action1<SqlBrite.Query>() {
@Override
public void call(SqlBrite.Query query) {
Cursor cursor = query.run();
List<Repo> list = new ArrayList<Repo>();
while (cursor.moveToNext()) {
Repo repo=new Repo();
String username = cursor.getString(cursor.getColumnIndex("name"));
int kid = cursor.getInt(cursor.getColumnIndex("_id"));
int idtest = cursor.getInt(cursor.getColumnIndex("idtest"));
repo.setId(idtest);
repo.setName(username);
repo.setKeyid(kid);
list.add(repo);
}
cursor.close();
long endtime1=System.currentTimeMillis();
String value="db:Sqlbrite=,time="+(endtime-currtime)+",转化list="+(endtime1-endtime)+",ps:size="+list.size();
Log.d(TAG,value);
Message message=new Message();
message.what=5;
message.obj=value;
handler.sendMessage(message);
}
});
数据库性能对比数据
这里写图片描述
