Binder 机制AIDL 分析 ( 创建 AIDL 文件 | 创建 Parcelable 类 | AIDL 中使用 Parcelable 类 | 编译工程生成 AIDL 对应的Java源文件 )(代
Posted 韩曙亮
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文章目录
一、创建 AIDL 文件
1、创建 AIDL 目录
在 android Studio 工程中 , 创建 aidl 文件 ;
右键点击 main 目录 , 选择 " New / Directory " ,
选择创建 " aidl " 目录 ,
创建好的 aidl 目录如下 :
2、创建 AIDL 文件
右键点击 " aidl " 目录 , 选择 " New / AIDL / AIDL File " 文件 ;
弹出对话框 , 输入 AIDL 接口名称 , 输入完毕后 , 选择 " Finish " 选项 ;
3、创建 Parcelable 类
创建 Parcelable 类 :
package kim.hsl.aidl_demo;
import android.os.Parcel;
import android.os.Parcelable;
public class Student implements Parcelable {
private String name;
public Student(String name) {
this.name = name;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
protected Student(Parcel in) {
name = in.readString();
}
public static final Creator<Student> CREATOR = new Creator<Student>() {
@Override
public Student createFromParcel(Parcel in) {
return new Student(in);
}
@Override
public Student[] newArray(int size) {
return new Student[size];
}
};
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeString(name);
}
public void readFromParcel(Parcel desc) {
name = desc.readString();
}
@Override
public String toString() {
return "name=" + name;
}
}
4、AIDL 目录下声明 Parcelable 类
在 aidl 目录下声明 Parcelable 类 : 在 aidl 目录下创建 Student.aidl 文件 , 然后声明如下内容 ;
package kim.hsl.aidl_demo;
parcelable Student;
5、AIDL 中使用 Parcelable 类
在创建的 AIDL 接口中使用 Student 类 :
① 首先要导入 Student 类 , import kim.hsl.aidl_demo.Student;
② 参数的输入输出 , in 写入, out 输出, inout 写入和输出 ;
// IMyAidlInterface.aidl
package kim.hsl.aidl_demo;
import kim.hsl.aidl_demo.Student;
// Declare any non-default types here with import statements
interface IMyAidlInterface {
/**
* Demonstrates some basic types that you can use as parameters
* and return values in AIDL.
*/
void basicTypes(int anInt, long aLong, boolean aBoolean, float aFloat,
double aDouble, String aString);
/**
* in 写入, out 输出, inout 写入和输出
*/
void addStudent(inout Student student);
/**
* 获取 Student 集合
*/
List<Student> getStudents();
}
二、编译工程生成 AIDL 文件对应的 Java 源文件
1、编译工程
点击 " 菜单栏 / Build / Make Project " 选项 , 即可编译当前的工程 , 进而生成 AIDL 接口对应的 Java 源文件 ;
编译后 , 在 " AIDL_Demo\\app\\build\\generated\\aidl_source_output_dir\\debug\\out\\kim\\hsl\\aidl_demo " 目录 , 生成了 AIDL 文件对应的源码 :
2、生成的 AIDL 对应 Java 源文件
下面的源码是编译生成的 Java 源文件 :
/*
* This file is auto-generated. DO NOT MODIFY.
*/
package kim.hsl.aidl_demo;
// Declare any non-default types here with import statements
public interface IMyAidlInterface extends android.os.IInterface
{
/** Default implementation for IMyAidlInterface. */
public static class Default implements kim.hsl.aidl_demo.IMyAidlInterface
{
/**
* Demonstrates some basic types that you can use as parameters
* and return values in AIDL.
*/
@Override public void basicTypes(int anInt, long aLong, boolean aBoolean, float aFloat, double aDouble, java.lang.String aString) throws android.os.RemoteException
{
}
/**
* in 写入, out 输出, inout 写入和输出
*/
@Override public void addStudent(kim.hsl.aidl_demo.Student student) throws android.os.RemoteException
{
}
/**
* 获取 Student 集合
*/
@Override public java.util.List<kim.hsl.aidl_demo.Student> getStudents() throws android.os.RemoteException
{
return null;
}
@Override
public android.os.IBinder asBinder() {
return null;
}
}
/** Local-side IPC implementation stub class. */
public static abstract class Stub extends android.os.Binder implements kim.hsl.aidl_demo.IMyAidlInterface
{
private static final java.lang.String DESCRIPTOR = "kim.hsl.aidl_demo.IMyAidlInterface";
/** Construct the stub at attach it to the interface. */
public Stub()
{
this.attachInterface(this, DESCRIPTOR);
}
/**
* Cast an IBinder object into an kim.hsl.aidl_demo.IMyAidlInterface interface,
* generating a proxy if needed.
*/
public static kim.hsl.aidl_demo.IMyAidlInterface asInterface(android.os.IBinder obj)
{
if ((obj==null)) {
return null;
}
android.os.IInterface iin = obj.queryLocalInterface(DESCRIPTOR);
if (((iin!=null)&&(iin instanceof kim.hsl.aidl_demo.IMyAidlInterface))) {
return ((kim.hsl.aidl_demo.IMyAidlInterface)iin);
}
return new kim.hsl.aidl_demo.IMyAidlInterface.Stub.Proxy(obj);
}
@Override public android.os.IBinder asBinder()
{
return this;
}
@Override public boolean onTransact(int code, android.os.Parcel data, android.os.Parcel reply, int flags) throws android.os.RemoteException
{
java.lang.String descriptor = DESCRIPTOR;
switch (code)
{
case INTERFACE_TRANSACTION:
{
reply.writeString(descriptor);
return true;
}
case TRANSACTION_basicTypes:
{
data.enforceInterface(descriptor);
int _arg0;
_arg0 = data.readInt();
long _arg1;
_arg1 = data.readLong();
boolean _arg2;
_arg2 = (0!=data.readInt());
float _arg3;
_arg3 = data.readFloat();
double _arg4;
_arg4 = data.readDouble();
java.lang.String _arg5;
_arg5 = data.readString();
this.basicTypes(_arg0, _arg1, _arg2, _arg3, _arg4, _arg5);
reply.writeNoException();
return true;
}
case TRANSACTION_addStudent:
{
data.enforceInterface(descriptor);
kim.hsl.aidl_demo.Student _arg0;
if ((0!=data.readInt())) {
_arg0 = kim.hsl.aidl_demo.Student.CREATOR.createFromParcel(data);
}
else {
_arg0 = null;
}
this.addStudent(_arg0);
reply.writeNoException();
if ((_arg0!=null)) {
reply.writeInt(1);
_arg0.writeToParcel(reply, android.os.Parcelable.PARCELABLE_WRITE_RETURN_VALUE);
}
else {
reply.writeInt(0);
}
return true;
}
case TRANSACTION_getStudents:
{
data.enforceInterface(descriptor);
java.util.List<kim.hsl.aidl_demo.Student> _result = this.getStudents();
reply.writeNoException();
reply.writeTypedList(_result);
return true;
}
default:
{
return super.onTransact(code, data, reply, flags);
}
}
}
private static class Proxy implements kim.hsl.aidl_demo.IMyAidlInterface
{
private android.os.IBinder mRemote;
Proxy(android.os.IBinder remote)
{
mRemote = remote;
}
@Override public android.os.IBinder asBinder()
{
return mRemote;
}
public java.lang.String getInterfaceDescriptor()
{
return DESCRIPTOR;
}
/**
* Demonstrates some basic types that you can use as parameters
* and return values in AIDL.
*/
@Override public void basicTypes(int anInt, long aLong, boolean aBoolean, float aFloat, double aDouble, java.lang.String aString) throws android.os.RemoteException
{
android.os.Parcel _data = android.os.Parcel.obtain();
android.os.Parcel _reply = android.os.Parcel.obtain();
try {
_data.writeInterfaceToken(DESCRIPTOR);
_data.writeInt(anInt);
_data.writeLong(aLong);
_data.writeInt(((aBoolean)?(1):(0)));
_data.writeFloat(aFloat);
_data.writeDouble(aDouble);
_data.writeString(aString);
boolean _status = mRemote.transact(Stub.TRANSACTION_basicTypes, _data, _reply, 0);
if (!_status && getDefaultImpl() != null) {
getDefaultImpl().basicTypes(anInt, aLong, aBoolean, aFloat, aDouble, aString);
return;
}
_reply.readException();
}
finally {
_reply.recycle();
_data.recycle();
}
}
/**
* in 写入, out 输出, inout 写入和输出
*/
@Override public void addStudent(kim.hsl.aidl_demo.Student student) throws android.os.RemoteException
{
android.os.Parcel _data = android.os.Parcel.obtain();
android.os.Parcel _reply = android.os.Parcel.obtain();
try {
_data.writeInterfaceToken(DESCRIPTOR);
if ((student!=null)) {
_data.writeInt(1);
student.writeToParcel(_data, 0);
}
else {
_data.writeInt(0);
}
boolean _status = mRemote.transact(Stub.TRANSACTION_addStudent, _data, _reply, 0);
if (!_status && getDefaultImpl() != null) {
getDefaultImpl().addStudent(student);
return;
}
_reply.readException();
if ((0!=_reply.readInt())) {
student.readFromParcel(_reply);
}
}
finally {
_reply.recycle();
_data.recycle();
}
}
/**
* 获取 Student 集合
*/
@Override public java.util.List<kim.hsl.aidl_demo.Student> getStudents() throws android.os.RemoteException
{
android.os.Parcel _data = android.os.Parcel.obtain();
android.os.Parcel _reply = android.os.Parcel.obtain();
java.util.List<kim.hsl.aidl_demo.Student> _result;
try {
_data.writeInterfaceToken(DESCRIPTOR);
boolean _status = mRemote.transact(Stub.TRANSACTION_getStudents, _data, _reply, 0);
if (!_status && getDefaultImpl() != null) {
return getDefaultImpl().getStudents();
}
_reply.readException();
_result = _reply.createTypedArrayList(kim.hsl.aidl_demo.Student.CREATOR);
}
finally {
_reply.recycle();
_data.recycle();
}
return _result;
}
public static kim.hsl.aidl_demo.IMyAidlInterface sDefaultImpl;
}
static final int TRANSACTION_basicTypes = (android.os.IBinderBinder 机制AIDL 分析 ( 创建 AIDL 文件 | 创建 Parcelable 类 | AIDL 中使用 Parcelable 类 | 编译工程生成 AIDL 对应的Java源文件 )(代