android studio 中aidl的简单使用

aidl是什么？

进程之前共享数据的一种方式

android studio上aidl的使用

如下为src的项目结构

1.在main下创建aidl文件夹，然后新建包，新建一个aidl文件  如上图中标记1

 代码如下
// AidlService.aidl
package ktc.com.aidlservice;
interface AidlService {
//我随便定义一个方法
  String getstring();
}

2.build项目，使AidlService.aidl生成AidlService如上图标记2

代码如下

其为自动生成

/*
 * This file is auto-generated.  DO NOT MODIFY.
 * Original file: F:\\project\\aidlservice\\app\\src\\main\\aidl\\ktc\\com\\aidlservice\\AidlService.aidl
 */
package ktc.com.aidlservice;
// Declare any non-default types here with import statements

public interface AidlService extends android.os.IInterface
{
/** Local-side IPC implementation stub class. */
public static abstract class Stub extends android.os.Binder implements ktc.com.aidlservice.AidlService
{
private static final java.lang.String DESCRIPTOR = "ktc.com.aidlservice.AidlService";
/** Construct the stub at attach it to the interface. */
public Stub()
{
this.attachInterface(this, DESCRIPTOR);
}
/**
 * Cast an IBinder object into an ktc.com.aidlservice.AidlService interface,
 * generating a proxy if needed.
 */
public static ktc.com.aidlservice.AidlService asInterface(android.os.IBinder obj)
{
if ((obj==null)) {
return null;
}
android.os.IInterface iin = obj.queryLocalInterface(DESCRIPTOR);
if (((iin!=null)&&(iin instanceof ktc.com.aidlservice.AidlService))) {
return ((ktc.com.aidlservice.AidlService)iin);
}
return new ktc.com.aidlservice.AidlService.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
{
switch (code)
{
case INTERFACE_TRANSACTION:
{
reply.writeString(DESCRIPTOR);
return true;
}
case TRANSACTION_getstring:
{
data.enforceInterface(DESCRIPTOR);
java.lang.String _result = this.getstring();
reply.writeNoException();
reply.writeString(_result);
return true;
}
}
return super.onTransact(code, data, reply, flags);
}
private static class Proxy implements ktc.com.aidlservice.AidlService
{
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;
}
@Override public java.lang.String getstring() throws android.os.RemoteException
{
android.os.Parcel _data = android.os.Parcel.obtain();
android.os.Parcel _reply = android.os.Parcel.obtain();
java.lang.String _result;
try {
_data.writeInterfaceToken(DESCRIPTOR);
mRemote.transact(Stub.TRANSACTION_getstring, _data, _reply, 0);
_reply.readException();
_result = _reply.readString();
}
finally {
_reply.recycle();
_data.recycle();
}
return _result;
}
}
static final int TRANSACTION_getstring = (android.os.IBinder.FIRST_CALL_TRANSACTION + 0);
}
public java.lang.String getstring() throws android.os.RemoteException;
}

3在java目录下进行编写调用Service代码

代码如下

package ktc.com.aidlservice;

import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.os.RemoteException;
import android.support.annotation.Nullable;
import android.util.Log;

/**
 * Created by daic on 2018/9/7.
 */

public class MyService extends Service {
    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        return  new Mybinder();
    }

    @Override
    public void onCreate() {
        Log.w("dz", "serviceonCreate: " );
        super.onCreate();
    }

    private class Mybinder extends AidlService.Stub {
        @Override
        public String getstring() throws RemoteException {
            Log.w("dz", "getstring: ");
            return "我是aidlservice中的代码";
        }

    }
}

记得注册

<service android:name=".MyService"
    android:process=":remote"
    android:exported="true">
    <intent-filter>
        <action android:name="com.ktc.aidls"></action>
    </intent-filter>
</service>

此时，服务端已经构建完毕

接下来编写客户端

如果在同一个app进行进程之间的通讯，则直接贴代码如下

package ktc.com.aidlservice;

import android.content.ComponentName;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.IBinder;
import android.os.RemoteException;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {
    private AidlService iService;
    private TextView tv;
    private static final String BOUNDSERVICE_PACKAGE = "ktc.com.aidlservice";
    private Button bt;

    public class conn  implements ServiceConnection{


        @Override
        public void onServiceConnected(ComponentName componentName, IBinder iBinder) {

            iService = AidlService.Stub.asInterface(iBinder);
            Log.w("dz", "onServiceConnected: ");
        }

        @Override
        public void onServiceDisconnected(ComponentName componentName) {

        }
    }
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Intent intentService = new Intent();
        intentService.setAction("com.ktc.aidls");
        intentService.setPackage(BOUNDSERVICE_PACKAGE);
        conn   myconnects=new conn();
        boolean b = bindService(intentService, myconnects, BIND_AUTO_CREATE);
        Log.w("dz", "onCreate: "+b+"" );
        tv = findViewById(R.id.tvs);
        bt = findViewById(R.id.bt);
        bt.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Log.w("dz", "onClick: " );
                try {
                    tv.setText(iService.getstring());
                } catch (RemoteException e) {
                    e.printStackTrace();
                }
            }
        });

    }

}

 

到这块已经aidl已经完了

但是如果是两个app之间进行通讯，那么就有点不同了。

因为当你把服务端搭好，你把上面客户端代码贴上去 你会发现报错，所以需要把最开始搭建服务器时候的图片中生成的文件2复制到另一个app中。但是要注意这时候这个文件需要放在src下面，并且包名需要和服务端的报名一致。

到这里最简单的一个aidl就写完了