### MySQLiteOpenHelper Example

Source: https://github.com/yuweiguocn/greendaoupgradehelper/blob/master/README.md

Example of a custom MySQLiteOpenHelper class that extends DaoMaster.OpenHelper and utilizes MigrationHelper for database upgrades.

```java
public class MySQLiteOpenHelper extends DaoMaster.OpenHelper {
    public MySQLiteOpenHelper(Context context, String name, SQLiteDatabase.CursorFactory factory) {
        super(context, name, factory);
    }
    @Override
    public void onUpgrade(Database db, int oldVersion, int newVersion) {
        MigrationHelper.migrate(db, new MigrationHelper.ReCreateAllTableListener() {
                    @Override
                    public void onCreateAllTables(Database db, boolean ifNotExists) {
                        DaoMaster.createAllTables(db, ifNotExists);
                    }
                    @Override
                    public void onDropAllTables(Database db, boolean ifExists) {
                        DaoMaster.dropAllTables(db, ifExists);
                    }
                },TestDataDao.class, TestData2Dao.class, TestData3Dao.class);
    }
}
```

--------------------------------

### Complete MySQLiteOpenHelper Class

Source: https://github.com/yuweiguocn/greendaoupgradehelper/blob/master/README_CH.md

This is a complete example of a custom SQLiteOpenHelper class that integrates GreenDaoUpgradeHelper for database migrations.

```java
public class MySQLiteOpenHelper extends DaoMaster.OpenHelper {
    public MySQLiteOpenHelper(Context context, String name, SQLiteDatabase.CursorFactory factory) {
        super(context, name, factory);
    }
    @Override
    public void onUpgrade(Database db, int oldVersion, int newVersion) {
        MigrationHelper.migrate(db, new MigrationHelper.ReCreateAllTableListener() {
                    
                    @Override
                    public void onCreateAllTables(Database db, boolean ifNotExists) {
                        DaoMaster.createAllTables(db, ifNotExists);
                    }
                    
                    @Override
                    public void onDropAllTables(Database db, boolean ifExists) {
                        DaoMaster.dropAllTables(db, ifExists);
                    }
                },TestDataDao.class, TestData2Dao.class, TestData3Dao.class);
    }
}
```

--------------------------------

### Initialize DaoMaster with Custom Helper

Source: https://github.com/yuweiguocn/greendaoupgradehelper/blob/master/README.md

Initialize the DaoMaster with a custom SQLiteOpenHelper instance to enable database upgrade functionality.

```java
//MigrationHelper.DEBUG = true;  //if you want see the log info,default is false
MySQLiteOpenHelper helper = new MySQLiteOpenHelper(this, "test.db",
                null);
        daoMaster = new DaoMaster(helper.getWritableDatabase());
```

--------------------------------

### Implement Database Upgrade Logic

Source: https://github.com/yuweiguocn/greendaoupgradehelper/blob/master/README_CH.md

Create a new class extending DaoMaster.OpenHelper and implement the onUpgrade method to handle database migrations using MigrationHelper. Provide all your Dao classes as arguments.

```java
MigrationHelper.migrate(db, new MigrationHelper.ReCreateAllTableListener() {
            
            @Override
            public void onCreateAllTables(Database db, boolean ifNotExists) {
                DaoMaster.createAllTables(db, ifNotExists);
            }
            
            @Override
            public void onDropAllTables(Database db, boolean ifExists) {
                DaoMaster.dropAllTables(db, ifExists);
            }
        },TestDataDao.class, TestData2Dao.class, TestData3Dao.class);
```

--------------------------------

### Initialize GreenDao Master

Source: https://github.com/yuweiguocn/greendaoupgradehelper/blob/master/README_CH.md

Initialize the DaoMaster with your custom SQLiteOpenHelper. Set MigrationHelper.DEBUG to true to view log information.

```java
//MigrationHelper.DEBUG = true; //如果你想查看日志信息，请将DEBUG设置为true
MySQLiteOpenHelper helper = new MySQLiteOpenHelper(this, "test.db",
                null);
        daoMaster = new DaoMaster(helper.getWritableDatabase());
```

--------------------------------

### Add Jitpack Repository to Gradle

Source: https://github.com/yuweiguocn/greendaoupgradehelper/blob/master/README_CH.md

Add the Jitpack repository to your root-level build.gradle file to include the GreenDaoUpgradeHelper library.

```gradle
allprojects {
		repositories {
			...
			maven { url "https://jitpack.io" }
		}
	}
```

--------------------------------

### ProGuard Configuration for GreenDao

Source: https://github.com/yuweiguocn/greendaoupgradehelper/blob/master/README_CH.md

Add these ProGuard rules to your proguard-rules.pro file to ensure proper functioning of GreenDao with obfuscation.

```java
-keepclassmembers class * extends org.greenrobot.greendao.AbstractDao {
    public static void dropTable(org.greenrobot.greendao.database.Database, boolean);
    public static void createTable(org.greenrobot.greendao.database.Database, boolean);
}
```

--------------------------------

### Add GreenDaoUpgradeHelper Dependency (GreenDao 3.0 below)

Source: https://github.com/yuweiguocn/greendaoupgradehelper/blob/master/README.md

Include the GreenDaoUpgradeHelper dependency for greenDao versions below 3.0.

```gradle
    dependencies {
            compile 'de.greenrobot:greendao:2.0.0'
	        compile 'com.github.yuweiguocn:GreenDaoUpgradeHelper:v1.0.1'
	}
```

--------------------------------

### Add GreenDaoUpgradeHelper Dependency (GreenDao < 3.0)

Source: https://github.com/yuweiguocn/greendaoupgradehelper/blob/master/README_CH.md

Use this dependency for older versions of GreenDao (prior to 3.0).

```gradle
dependencies {
	        compile 'de.greenrobot:greendao:2.0.0'
	        compile 'com.github.yuweiguocn:GreenDaoUpgradeHelper:v1.0.1'
	}
```

--------------------------------

### Add GreenDaoUpgradeHelper Dependency (GreenDao 3.0+)

Source: https://github.com/yuweiguocn/greendaoupgradehelper/blob/master/README_CH.md

Include the GreenDaoUpgradeHelper dependency in your app-level build.gradle file for GreenDao versions 3.0 and above.

```gradle
dependencies {
	        compile 'org.greenrobot:greendao:3.2.0'
	        compile 'io.github.yuweiguocn:GreenDaoUpgradeHelper:v2.2.1'
	}
```

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