orm优化

PublicComponent/build.gradle

@@ -1,4 +1,5 @@
 apply plugin: 'com.android.library'
+apply plugin: 'kotlin-android'
 
 android {
   compileSdkVersion rootProject.ext.compileSdkVersion
@@ -33,10 +34,15 @@ android {
 dependencies {
   implementation fileTree(dir: 'libs', include: ['*.jar'])
   testImplementation 'junit:junit:4.12'
+  implementation "androidx.core:core-ktx:+"
+  implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
 }
 
 //apply from: 'bintray-release.gradle'
 ext{
   PUBLISH_ARTIFACT_ID = 'public'
 }
-apply from: '../gradle/mavenCentral-release.gradle'
+apply from: '../gradle/mavenCentral-release.gradle'
+repositories {
+  mavenCentral()
+}

PublicComponent/src/main/AndroidManifest.xml

@@ -2,4 +2,11 @@
     package="com.arialyy.aria.publiccomponent" >
 
   <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+
+  <application>
+    <provider
+        android:authorities="${applicationId}.com.arialyy.aria.provider"
+        android:name="com.arialyy.aria.orm.DbContentProvider"
+        android:exported="false" />
+  </application>
 </manifest>

PublicComponent/src/main/java/com/arialyy/aria/orm/AbsDelegate.java

@@ -21,7 +21,7 @@ import android.database.sqlite.SQLiteDatabase;
 /**
  * Created by laoyuyu on 2018/3/22.
  */
-abstract class AbsDelegate {
+public abstract class AbsDelegate {
   static final String TAG = "AbsDelegate";
 
   void closeCursor(Cursor cursor) {

PublicComponent/src/main/java/com/arialyy/aria/orm/DbContentProvider.kt

@@ -0,0 +1,174 @@
+/*
+ * Copyright (C) 2016 AriaLyy(https://github.com/AriaLyy/Aria)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.arialyy.aria.orm
+
+import android.content.ContentProvider
+import android.content.ContentValues
+import android.content.Context
+import android.database.Cursor
+import android.net.Uri
+import com.arialyy.aria.util.ALog
+import com.arialyy.aria.util.CommonUtil
+
+/**
+ * @Author laoyuyu
+ * @Description
+ * @Date 2:25 下午 2022/4/25
+ **/
+class DbContentProvider : ContentProvider() {
+  val TAG = "DbContentProvider"
+
+  companion object {
+    // const val KEY_TABLE_NAME = "tableName"
+    const val KEY_ROW_ID = "rowId"
+    const val KEY_TABLE_CLAZZ = "tableClazz"
+    const val KEY_LIMIT = "limit"
+
+    fun createRequestUrl(context: Context, clazz: Class<*>): Uri {
+      return Uri.parse("content://${context.packageName}.com.arialyy.aria.provide/request?${KEY_TABLE_CLAZZ}=${clazz.name}")
+    }
+
+    fun getRequestUrl(context: Context): String {
+      return "content://${context.packageName}.com.arialyy.aria.provide/request"
+    }
+
+    fun getResponseUrl(context: Context): String {
+      return "content://${context.packageName}.com.arialyy.aria.provide/response"
+    }
+  }
+
+  /**
+   * key: clazzPath, value: tableName
+   */
+  private val tableExistMap = mutableMapOf<String, String>()
+
+  private lateinit var helper: SqlHelper
+
+  override fun onCreate(): Boolean {
+    helper = SqlHelper.init(context)
+    return true
+  }
+
+  private fun getTableName(uri: Uri): String? {
+    val db = SqlUtil.checkDb(helper.db)
+    val clazzName = uri.getQueryParameter(KEY_TABLE_CLAZZ)
+    if (tableExistMap[clazzName!!] != null) {
+      return tableExistMap[clazzName]
+    }
+
+    val clazz: Class<out DbEntity>? =
+      javaClass.classLoader?.loadClass(clazzName) as Class<out DbEntity>?
+    if (clazz == null) {
+      ALog.e(TAG, "【$clazz】为空")
+      return null
+    }
+    SqlUtil.checkOrCreateTable(db, clazz)
+    val tableName = CommonUtil.getClassName(clazz)
+    tableExistMap[clazzName] = tableName
+    return tableName
+  }
+
+  override fun query(
+    uri: Uri,
+    projection: Array<out String>?,
+    selection: String?,
+    selectionArgs: Array<out String>?,
+    sortOrder: String?
+  ): Cursor? {
+    val db = SqlUtil.checkDb(helper.db)
+    val tableName = getTableName(uri)
+    if (tableName.isNullOrBlank()) {
+      return null
+    }
+    val clazzName = uri.getQueryParameter(KEY_TABLE_CLAZZ)
+    val clazz = javaClass.classLoader?.loadClass(clazzName) as Class<out DbEntity>?
+    val columns = SqlUtil.getColumns(clazz)
+    val limit = uri.getQueryParameter(KEY_LIMIT)
+    return db.query(
+      tableName,
+      columns.toTypedArray(),
+      selection,
+      selectionArgs,
+      null,
+      null,
+      null,
+      limit
+    )
+  }
+
+  override fun getType(uri: Uri): String? {
+    return null
+  }
+
+  override fun insert(uri: Uri, values: ContentValues?): Uri? {
+    val db = SqlUtil.checkDb(helper.db)
+    val tableName = getTableName(uri)
+    if (tableName.isNullOrBlank()) {
+      return null
+    }
+    db.beginTransaction()
+    try {
+      val rowId = db.insert(tableName, null, values)
+      if (rowId == -1L) {
+        return null
+      }
+      return Uri.parse("${getResponseUrl(context!!)}?${KEY_ROW_ID}=$rowId")
+    } finally {
+      db.endTransaction()
+    }
+  }
+
+  override fun delete(uri: Uri, selection: String?, selectionArgs: Array<out String>?): Int {
+    val db = SqlUtil.checkDb(helper.db)
+    val tableName = getTableName(uri)
+    if (tableName.isNullOrBlank()) {
+      return -1
+    }
+    db.beginTransaction()
+    try {
+      val rowId = db.delete(tableName, selection, selectionArgs)
+      if (rowId == -1) {
+        return -1
+      }
+      return rowId
+    } finally {
+      db.endTransaction()
+    }
+  }
+
+  override fun update(
+    uri: Uri,
+    values: ContentValues?,
+    selection: String?,
+    selectionArgs: Array<out String>?
+  ): Int {
+    val db = SqlUtil.checkDb(helper.db)
+    val tableName = getTableName(uri)
+    if (tableName.isNullOrBlank()) {
+      return -1
+    }
+    db.beginTransaction()
+    try {
+      val rowId = db.update(tableName, values, selection, selectionArgs)
+      if (rowId == -1) {
+        return -1
+      }
+      return rowId
+    } finally {
+      db.endTransaction()
+    }
+  }
+}

PublicComponent/src/main/java/com/arialyy/aria/orm/DbUtil.kt

@@ -0,0 +1,83 @@
+package com.arialyy.aria.orm
+
+import android.content.ContentValues
+import android.text.TextUtils
+import com.arialyy.aria.orm.annotation.Primary
+import com.arialyy.aria.util.CommonUtil
+import java.lang.reflect.Field
+import java.lang.reflect.Type
+
+/**
+ * @Author laoyuyu
+ * @Description
+ * @Date 2:58 下午 2022/4/25
+ **/
+internal object DbUtil {
+  /**
+   * 创建存储数据\更新数据时使用的ContentValues
+   *
+   * @return 如果没有字段属性，返回null
+   */
+  fun createValues(dbEntity: DbEntity): ContentValues? {
+    val fields = CommonUtil.getAllFields(dbEntity.javaClass)
+    if (fields.size > 0) {
+      val values = ContentValues()
+      try {
+        for (field in fields) {
+          field.isAccessible = true
+          if (isIgnore(dbEntity, field)) {
+            continue
+          }
+          var value: String? = null
+          val type: Type = field.type
+          if (type === MutableMap::class.java && SqlUtil.checkMap(field)) {
+            value = SqlUtil.map2Str(field[dbEntity] as Map<String?, String?>)
+          } else if (type === MutableList::class.java && SqlUtil.checkList(field)) {
+            value = SqlUtil.list2Str(dbEntity, field)
+          } else {
+            val obj = field[dbEntity]
+            if (obj != null) {
+              value = field[dbEntity].toString()
+            }
+          }
+          values.put(field.name, SqlUtil.encodeStr(value))
+        }
+        return values
+      } catch (e: IllegalAccessException) {
+        e.printStackTrace()
+      }
+    }
+    return null
+  }
+
+  /**
+   * `true`自动增长的主键和需要忽略的字段
+   */
+  @Throws(IllegalAccessException::class) private fun isIgnore(obj: Any, field: Field): Boolean {
+    if (SqlUtil.isIgnore(field)) {
+      return true
+    }
+    // 忽略为空的字段
+    val value = field[obj] ?: return true
+    if (value is String) {
+      if (TextUtils.isEmpty(value.toString())) {
+        return true
+      }
+    }
+    if (value is List<*>) {
+      if (value.size == 0) {
+        return true
+      }
+    }
+    if (value is Map<*, *>) {
+      if (value.size == 0) {
+        return true
+      }
+    }
+    if (SqlUtil.isPrimary(field)) {   //忽略自动增长的主键
+      val p = field.getAnnotation(Primary::class.java)
+      return p.autoincrement
+    }
+    return false
+  }
+}

PublicComponent/src/main/java/com/arialyy/aria/orm/DelegateDel.kt

@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2016 AriaLyy(https://github.com/AriaLyy/Aria)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.arialyy.aria.orm
+
+import android.content.Context
+import com.arialyy.aria.util.ALog
+import com.arialyy.aria.util.CommonUtil
+
+/**
+ * @Author laoyuyu
+ * @Description
+ * @Date 3:55 下午 2022/4/25
+ **/
+class DelegateDel : AbsDelegate() {
+
+  /**
+   * 删除某条数据
+   */
+  @Synchronized fun <T : DbEntity?> delData(
+    context: Context,
+    clazz: Class<T>,
+    vararg expression: String
+  ) {
+    if (!CommonUtil.checkSqlExpression(*expression)) {
+      return
+    }
+    val selectionArgs = arrayOfNulls<String>(expression.size - 1)
+    expression.forEachIndexed { index, s ->
+      if (index == 0) {
+        return@forEachIndexed
+      }
+      selectionArgs[index - 1] = s
+    }
+
+    val uri = DbContentProvider.createRequestUrl(context, clazz)
+    val rowId = context.contentResolver.delete(uri, expression[0], selectionArgs)
+    if (rowId != -1) {
+      ALog.d(TAG, "删除成功，删除的rowId = $rowId")
+    }
+  }
+}

PublicComponent/src/main/java/com/arialyy/aria/orm/DelegateInsert.kt

@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2016 AriaLyy(https://github.com/AriaLyy/Aria)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.arialyy.aria.orm
+
+import android.content.ContentValues
+import android.content.Context
+import com.arialyy.aria.util.ALog
+
+/**
+ * @Author laoyuyu
+ * @Description
+ * @Date 2:50 下午 2022/4/25
+ **/
+class DelegateInsert : AbsDelegate() {
+  /**
+   * 插入多条记录
+   */
+  @Synchronized fun <T : DbEntity> insertManyData(context: Context, dbEntities: List<T>) {
+    for (entity in dbEntities) {
+      insertData(context, entity)
+    }
+  }
+
+  /**
+   * 插入数据
+   */
+  @Synchronized fun insertData(context: Context, dbEntity: DbEntity) {
+    val value: ContentValues? = DbUtil.createValues(dbEntity)
+    if (value == null) {
+      ALog.e(TAG, "保存记录失败，记录没有属性字段")
+    } else {
+      val uri = DbContentProvider.createRequestUrl(context, dbEntity.javaClass)
+      val responseUri = context.contentResolver.insert(uri, value)
+      val rowId = responseUri?.getQueryParameter(DbContentProvider.KEY_ROW_ID)
+      if (rowId.isNullOrBlank()) {
+        ALog.e(TAG, "插入失败，rowId为空")
+      } else {
+        dbEntity.rowID = rowId.toLong()
+        ALog.d(TAG, "插入完成，responseUrl = $responseUri")
+      }
+    }
+  }
+}

PublicComponent/src/main/java/com/arialyy/aria/orm/DelegateUpdate.java

@@ -16,15 +16,10 @@
 package com.arialyy.aria.orm;
 
 import android.content.ContentValues;
-import android.database.sqlite.SQLiteDatabase;
-import android.text.TextUtils;
-import com.arialyy.aria.orm.annotation.Primary;
+import android.content.Context;
+import android.net.Uri;
 import com.arialyy.aria.util.ALog;
-import com.arialyy.aria.util.CommonUtil;
-import java.lang.reflect.Field;
-import java.lang.reflect.Type;
 import java.util.List;
-import java.util.Map;
 
 /**
  * Created by laoyuyu on 2018/3/22. 增加数据、更新数据
@@ -33,185 +28,31 @@ class DelegateUpdate extends AbsDelegate {
   private DelegateUpdate() {
   }
 
-  /**
-   * 删除某条数据
-   */
-  synchronized <T extends DbEntity> void delData(SQLiteDatabase db, Class<T> clazz,
-      String... expression) {
-    SqlUtil.checkOrCreateTable(db, clazz);
-    db = checkDb(db);
-    if (!CommonUtil.checkSqlExpression(expression)) {
-      return;
-    }
-
-    String sql = "DELETE FROM " + CommonUtil.getClassName(clazz) + " WHERE " + expression[0] + " ";
-    sql = sql.replace("?", "%s");
-    Object[] params = new String[expression.length - 1];
-    for (int i = 0, len = params.length; i < len; i++) {
-      params[i] = String.format("'%s'", SqlUtil.encodeStr(expression[i + 1]));
-    }
-    sql = String.format(sql, params);
-    db.execSQL(sql);
-  }
-
   /**
    * 修改某行数据
    */
-  synchronized void updateData(SQLiteDatabase db, DbEntity dbEntity) {
-    SqlUtil.checkOrCreateTable(db, dbEntity.getClass());
-    db = checkDb(db);
-    ContentValues values = createValues(dbEntity);
+  synchronized void updateData(Context context, DbEntity dbEntity) {
+    Uri uri = DbContentProvider.Companion.createRequestUrl(context, dbEntity.getClass());
+    ContentValues values = DbUtil.INSTANCE.createValues(dbEntity);
     if (values != null) {
-      db.update(CommonUtil.getClassName(dbEntity), values, "rowid=?",
-          new String[] { String.valueOf(dbEntity.rowID) });
-    } else {
-      ALog.e(TAG, "更新记录失败，记录没有属性字段");
-    }
-  }
-
-  /**
-   * 更新多条记录
-   */
-  synchronized <T extends DbEntity> void updateManyData(SQLiteDatabase db, List<T> dbEntities) {
-    db = checkDb(db);
-    db.beginTransaction();
-    try {
-      Class oldClazz = null;
-      String table = null;
-      for (DbEntity entity : dbEntities) {
-        if (oldClazz == null || oldClazz != entity.getClass() || table == null) {
-          oldClazz = entity.getClass();
-          table = CommonUtil.getClassName(oldClazz);
-        }
-        ContentValues value = createValues(entity);
-        if (value == null) {
-          ALog.e(TAG, "更新记录失败，记录没有属性字段");
-        } else {
-          db.update(table, value, "rowid=?", new String[] { String.valueOf(entity.rowID) });
-        }
-      }
-      db.setTransactionSuccessful();
-    } catch (Exception e) {
-      e.printStackTrace();
-    } finally {
-      db.endTransaction();
-    }
-  }
-
-  /**
-   * 插入多条记录
-   */
-  synchronized <T extends DbEntity> void insertManyData(SQLiteDatabase db, List<T> dbEntities) {
-    db = checkDb(db);
-    db.beginTransaction();
-    try {
-      Class oldClazz = null;
-      String table = null;
-      for (DbEntity entity : dbEntities) {
-        if (oldClazz == null || oldClazz != entity.getClass() || table == null) {
-          oldClazz = entity.getClass();
-          table = CommonUtil.getClassName(oldClazz);
-          SqlUtil.checkOrCreateTable(db, oldClazz);
-        }
-
-        ContentValues value = createValues(entity);
-        if (value == null) {
-          ALog.e(TAG, "保存记录失败，记录没有属性字段");
-        } else {
-          entity.rowID = db.insert(table, null, value);
-        }
-      }
-      db.setTransactionSuccessful();
-    } catch (Exception e) {
-      e.printStackTrace();
-    } finally {
-      db.endTransaction();
-    }
-  }
-
-  /**
-   * 插入数据
-   */
-  synchronized void insertData(SQLiteDatabase db, DbEntity dbEntity) {
-    SqlUtil.checkOrCreateTable(db, dbEntity.getClass());
-    db = checkDb(db);
-    ContentValues values = createValues(dbEntity);
-    if (values != null) {
-      dbEntity.rowID = db.insert(CommonUtil.getClassName(dbEntity), null, values);
-    } else {
-      ALog.e(TAG, "保存记录失败，记录没有属性字段");
-    }
-  }
-
-  /**
-   * 创建存储数据\更新数据时使用的ContentValues
-   *
-   * @return 如果没有字段属性，返回null
-   */
-  private ContentValues createValues(DbEntity dbEntity) {
-    List<Field> fields = CommonUtil.getAllFields(dbEntity.getClass());
-    if (fields.size() > 0) {
-      ContentValues values = new ContentValues();
-      try {
-        for (Field field : fields) {
-          field.setAccessible(true);
-          if (isIgnore(dbEntity, field)) {
-            continue;
-          }
-          String value = null;
-          Type type = field.getType();
-          if (type == Map.class && SqlUtil.checkMap(field)) {
-            value = SqlUtil.map2Str((Map<String, String>) field.get(dbEntity));
-          } else if (type == List.class && SqlUtil.checkList(field)) {
-            value = SqlUtil.list2Str(dbEntity, field);
-          } else {
-            Object obj = field.get(dbEntity);
-            if (obj != null) {
-              value = field.get(dbEntity).toString();
-            }
-          }
-          values.put(field.getName(), SqlUtil.encodeStr(value));
-        }
-        return values;
-      } catch (IllegalAccessException e) {
-        e.printStackTrace();
+      int rowId = context.getContentResolver()
+          .update(uri, values, "rowid=?", new String[] { String.valueOf(dbEntity.rowID) });
+      if (rowId != -1) {
+        ALog.d(TAG, "更新数据成功，rowid = " + rowId);
+      } else {
+        ALog.e(TAG, "更新数据成功，rowid = " + rowId);
       }
+      return;
     }
-    return null;
+    ALog.e(TAG, "更新记录失败，记录没有属性字段");
   }
 
   /**
-   * {@code true}自动增长的主键和需要忽略的字段
+   * 更新多条记录
    */
-  private boolean isIgnore(Object obj, Field field) throws IllegalAccessException {
-    if (SqlUtil.isIgnore(field)) {
-      return true;
-    }
-    Object value = field.get(obj);
-    if (value == null) {  // 忽略为空的字段
-      return true;
-    }
-    if (value instanceof String) {
-      if (TextUtils.isEmpty(String.valueOf(value))) {
-        return true;
-      }
-    }
-    if (value instanceof List) {
-      if (((List) value).size() == 0) {
-        return true;
-      }
+  synchronized <T extends DbEntity> void updateManyData(Context context, List<T> dbEntities) {
+    for (DbEntity entity : dbEntities) {
+      updateData(context, entity);
     }
-    if (value instanceof Map) {
-      if (((Map) value).size() == 0) {
-        return true;
-      }
-    }
-
-    if (SqlUtil.isPrimary(field)) {   //忽略自动增长的主键
-      Primary p = field.getAnnotation(Primary.class);
-      return p.autoincrement();
-    }
-
-    return false;
   }
 }

PublicComponent/src/main/java/com/arialyy/aria/orm/DelegateWrapper.java

@@ -29,12 +29,14 @@ public class DelegateWrapper {
 
   private SQLiteDatabase mDb;
   private DelegateManager mDManager;
+  private Context context;
 
   private DelegateWrapper() {
 
   }
 
   private DelegateWrapper(Context context) {
+    this.context = context.getApplicationContext();
     SqlHelper helper = SqlHelper.init(context.getApplicationContext());
     mDb = helper.getDb();
     mDManager = DelegateManager.getInstance();
@@ -106,21 +108,21 @@ public class DelegateWrapper {
    * 删除某条数据
    */
   <T extends DbEntity> void delData(Class<T> clazz, String... expression) {
-    mDManager.getDelegate(DelegateUpdate.class).delData(mDb, clazz, expression);
+    mDManager.getDelegate(DelegateDel.class).delData(context, clazz, expression);
   }
 
   /**
    * 修改某行数据
    */
   void updateData(DbEntity dbEntity) {
-    mDManager.getDelegate(DelegateUpdate.class).updateData(mDb, dbEntity);
+    mDManager.getDelegate(DelegateUpdate.class).updateData(context, dbEntity);
   }
 
   /**
    * 更新多条数据
    */
   <T extends DbEntity> void updateManyData(List<T> dbEntitys) {
-    mDManager.getDelegate(DelegateUpdate.class).updateManyData(mDb, dbEntitys);
+    mDManager.getDelegate(DelegateUpdate.class).updateManyData(context, dbEntitys);
   }
 
   /**
@@ -178,14 +180,14 @@ public class DelegateWrapper {
    * 插入数据
    */
   void insertData(DbEntity dbEntity) {
-    mDManager.getDelegate(DelegateUpdate.class).insertData(mDb, dbEntity);
+    mDManager.getDelegate(DelegateInsert.class).insertData(context, dbEntity);
   }
 
   /**
    * 插入多条数据
    */
   <T extends DbEntity> void insertManyData(List<T> dbEntitys) {
-    mDManager.getDelegate(DelegateUpdate.class).insertManyData(mDb, dbEntitys);
+    mDManager.getDelegate(DelegateInsert.class).insertManyData(context, dbEntitys);
   }
 
   /**

build.gradle

@@ -1,7 +1,7 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 buildscript {
-//  ext.kotlin_version = '1.3.20'
-  ext.kotlin_version = '1.4.30'
+  ext.kotlin_version = '1.5.20'
+  //  ext.kotlin_version = '1.3.20'
   repositories {
     jcenter()
     mavenCentral()
@@ -12,7 +12,8 @@ buildscript {
     classpath 'com.android.tools.build:gradle:4.1.3'
 //    classpath 'com.novoda:bintray-release:0.9.1'
     classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:${kotlin_version}"
-    classpath "org.jetbrains.dokka:dokka-gradle-plugin:1.4.30" // kotlin 文档引擎
+    classpath "org.jetbrains.dokka:dokka-gradle-plugin:1.4.30"
+    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version" // kotlin 文档引擎
     //        classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.7'
     //        classpath 'com.github.dcendents:android-maven-gradle-plugin:1.5'
     // NOTE: Do not place your application dependencies here; they belong