bean-annotation

1. @Bean(generate get() set() toString())
2. @Parcelable(implements Parcelable)

Question

1.How to resolve AndroidStudio prompt underline on JavaPoet Modifier.PUBLIC.

resolve: We can new Android Library Module, in which dependencies annotationProcessor project(‘:xxx-compiler’) instead of app module.

MethodSpec.Builder method = MethodSpec.methodBuilder(methodName)
                .addModifiers(Modifier.PUBLIC)
                .returns(fieldType)
                .addStatement("return " + fieldName);

我们在写注解处理器时，Modifier.PUBLIC 会被Android Studio用红色下划线提示，原因是在app module里直接依赖了，新建一个Android Library 来依赖注解处理器可以解决红线提示问题。依个人理解，注解处理器一般用来动态生成一些代码，这些代码生成在Library Module里作为其它模块的依赖，项目模块更整洁独立，使用注解处理器更应该往模块独立化上思考。

@Parcelable usage

1.How to use @Parcelable.

@Parcelable
public class Person {
    private String name;
    private String age;
}

2.What will be generated automatically.

package com.lofiwang.beansdk;
import android.os.Parcel;
import android.os.Parcelable;
import java.lang.ClassLoader;
import java.lang.Override;
import java.lang.String;
public class PersonParcelable implements Parcelable {
  public static final Parcelable.Creator<PersonParcelable> CREATOR = new Parcelable.Creator<PersonParcelable>() {
    @Override
    public PersonParcelable createFromParcel(Parcel source) {
      return new PersonParcelable(source);
    }
    @Override
    public PersonParcelable[] newArray(int size) {
      return new PersonParcelable[size];
    }
  };
  private String name;
  private String age;
  public PersonParcelable() {
  }
  public PersonParcelable(Parcel in) {
    ClassLoader classLoader = this.getClass().getClassLoader();
    this.name = (String)in.readValue(classLoader);
    this.age = (String)in.readValue(classLoader);
  }
  @Override
  public int describeContents() {
    return 0;
  }
  @Override
  public void writeToParcel(Parcel dest, int flags) {
    dest.writeValue(this.name);
    dest.writeValue(this.age);
  }
}

@Bean usage

1.How to use @Bean.

package com.lofiwang.beanannotation;
import com.lofiwang.beanannotation.compiler.bean;
@bean
public class Person {
    private String name;
    private String age;
}

2.What will be generated automatically.

package com.lofiwang.beanannotation;
import java.lang.Override;
import java.lang.String;
public class PersonBean {
  private String name;
  private String age;
  public void setName(String name) {
    this.name=name;
  }
  public String getName() {
    return name;
  }
  public void setAge(String age) {
    this.age=age;
  }
  public String getAge() {
    return age;
  }
  @Override
  public String toString() {
    return "PersonBean{" + "name:" + name + "age:" + age + "}";
  }
}