用注解实现回调

AriaAnnotations/.gitignore

@@ -0,0 +1 @@
+/build

AriaAnnotations/build.gradle

@@ -0,0 +1,12 @@
+apply plugin: 'java'
+
+tasks.withType(JavaCompile) {
+  options.encoding = "UTF-8"
+}
+
+dependencies {
+  compile fileTree(dir: 'libs', include: ['*.jar'])
+
+  sourceCompatibility = "1.7"
+  targetCompatibility = "1.7"
+}

AriaAnnotations/src/main/java/com/arialyy/annotations/Download.java

@@ -0,0 +1,42 @@
+package com.arialyy.annotations;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * Created by Aria.Lao on 2017/6/6.
+ */
+@Retention(RetentionPolicy.CLASS) @Target(ElementType.METHOD) public @interface Download {
+  @Retention(RetentionPolicy.CLASS) @Target(ElementType.METHOD) public @interface onPre {
+  }
+
+  @Retention(RetentionPolicy.CLASS) @Target(ElementType.METHOD) public @interface onTaskPre {
+  }
+
+  @Retention(RetentionPolicy.CLASS) @Target(ElementType.METHOD) public @interface onTaskResume {
+  }
+
+  @Retention(RetentionPolicy.CLASS) @Target(ElementType.METHOD) public @interface onTaskStart {
+  }
+
+  @Retention(RetentionPolicy.CLASS) @Target(ElementType.METHOD) public @interface onTaskStop {
+  }
+
+  @Retention(RetentionPolicy.CLASS) @Target(ElementType.METHOD) public @interface onTaskCancel {
+  }
+
+  @Retention(RetentionPolicy.CLASS) @Target(ElementType.METHOD) public @interface onTaskFail {
+  }
+
+  @Retention(RetentionPolicy.CLASS) @Target(ElementType.METHOD) public @interface onTaskComplete {
+  }
+
+  @Retention(RetentionPolicy.CLASS) @Target(ElementType.METHOD) public @interface onTaskRunning {
+  }
+
+  @Retention(RetentionPolicy.CLASS) @Target(ElementType.METHOD)
+  public @interface onNoSupportBreakPoint {
+  }
+}

AriaAnnotations/src/main/java/com/arialyy/annotations/Test.java

@@ -0,0 +1,12 @@
+package com.arialyy.annotations;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * Created by Aria.Lao on 2017/6/6.
+ */
+@Retention(RetentionPolicy.CLASS) @Target(ElementType.METHOD) public @interface Test {
+}