文章目录
之前记录Android的AIDL使用，这次就多个进程绑定同一个AIDL服务，其实跟之前一样，只不过是进行了多次绑定而已。
流水账，可以不用看
正文
存在如下模块和lib库
# lib库 BiuMoreAidl # 模块（客户端和服务端） BiuMoreAidlClent BiuMoreAidlService
客户端里两个Activity，但不同进程。
BiuMoreAidl
lib库中就公用的aidl的定义
// IMedia.aidl package com.biumall.aidl; interface IMedia { void previous(); void play(); void pause(); void next(); }
build.gradle中添加
buildFeatures{aidl true}
BiuMoreAidlService
这里需要引入BiuMoreAidl
startService(new Intent(this, AidlService.class));
build.gradle
dependencies { implementation project(":BiuMoreAidl") }
AndroidManifest.xml
这里是服务配置，配置了一个Action，方便用于启动服务。
<service android:name=".AidlService" android:exported="true"> <intent-filter> <action android:name="com.biumall.service.AidlService" /> </intent-filter> </service>
ServiceApp.java
这里开启服务
public class ServiceApp extends Application { @Override public void onCreate() { super.onCreate(); startService(new Intent(this, AidlService.class)); } }
MediaBinder.java
MediaBinder是实现IMedia.aidl接口
public class MediaBinder extends IMedia.Stub { private int mCount = 0; public void onStart() { } public void onStop() { } @Override public void previous() throws RemoteException { } @Override public void play() throws RemoteException { } @Override public void pause() throws RemoteException { mCount++; //每次调用增加异常 } @Override public void next() throws RemoteException { } }
除了实现IMedia.aidl接口，还是薪资两个方法onStart()和onStop()，用于初始化和关闭资源，这里暂时不做啥、
AidlService.java
后台服务，用于被客户端绑定，并返回MediaBinder的。
public class AidlService extends Service { private MediaBinder mMediaBinder; @Nullable @Override public IBinder onBind(Intent intent) { return mMediaBinder; } @Override public void onCreate() { super.onCreate(); mMediaBinder = new MediaBinder(); mMediaBinder.onStart(); } @Override public int onStartCommand(Intent intent, int flags, int startId) { return super.onStartCommand(intent, flags, startId); } @Override public void onDestroy() { super.onDestroy(); if (null != mMediaBinder) { mMediaBinder.onStop(); } mMediaBinder = null; } }
BiuMoreAidlClent
客户端就分两个Activity不同进程中进行绑定服务。
build.gradle
也需要引入BiuMoreAidl
dependencies {
implementation project(":BiuMoreAidl")
}
AndroidManifest.xml
<activity
android:name="com.biumall.client.MainActivity"
android:exported="true"
android:launchMode="singleInstance">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.biumall.client.TwoActivity"
android:exported="true"
android:launchMode="singleInstance"
android:process=":another_process">
</activity>
android:process=":another_process"这可以说可以开启新的进程。
ClientApp.java
public class ClientApp extends Application {
@SuppressLint("StaticFieldLeak")
private static Context mContext = null;
@Override
public void onCreate() {
super.onCreate();
mContext = this;
}
public static Context getContext() {
return mContext;
}
}
MainActivity.java
PS: TwoActivity跟MainActivity一样，这里就不附上了
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private IMedia mIMedia;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initUI();
bindService();
}
@Override
protected void onDestroy() {
super.onDestroy();
unbindService();
}
private void bindService() {
if (null == mIMedia) {
Intent intent = new Intent();
//需要指定绑定包名，不可以匿名绑定服务
intent.setPackage("com.biumall.service");
intent.setAction("com.biumall.service.AidlService");
boolean bind = ClientApp.getContext().bindService(intent, mServiceConnection, Context.BIND_AUTO_CREATE);
}
}
private void unbindService() {
if (null != mIMedia) {
ClientApp.getContext().unbindService(mServiceConnection);
mIMedia = null;
}
}
private void initUI() {
findViewById(R.id.main_bt_go_other).setOnClickListener(this);
findViewById(R.id.main_bt_pause).setOnClickListener(this);
findViewById(R.id.main_bt_play).setOnClickListener(this);
findViewById(R.id.main_bt_previous).setOnClickListener(this);
findViewById(R.id.main_bt_next).setOnClickListener(this);
}
private final ServiceConnection mServiceConnection = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
mIMedia = IMedia.Stub.asInterface(service);
try {
mIMedia.asBinder().linkToDeath(new IBinder.DeathRecipient() {
@Override
public void binderDied() {
//binderDied
}
}, 0);
} catch (RemoteException e) {
e.printStackTrace();
}
}
@Override
public void onServiceDisconnected(ComponentName name) {
mIMedia = null;
}
};
@SuppressLint("NonConstantResourceId")
@Override
public void onClick(View v) {
try {
switch (v.getId()) {
case R.id.main_bt_go_other:
Intent intent = new Intent(MainActivity.this, TwoActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
ClientApp.getContext().startActivity(intent);
break;
case R.id.main_bt_previous:
if (null != mIMedia) {
mIMedia.previous();
}
break;
case R.id.main_bt_next:
if (null != mIMedia) {
mIMedia.next();
}
break;
case R.id.main_bt_pause:
if (null != mIMedia) {
mIMedia.pause();
}
break;
case R.id.main_bt_play:
if (null != mIMedia) {
mIMedia.play();
}
break;
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/background_dark"
android:gravity="center"
android:orientation="vertical">
<Button
android:id="@+id/main_bt_go_other"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="20dp"
android:text="GoTo Two"
android:textSize="30sp" />
<Button
android:id="@+id/main_bt_play"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="20dp"
android:text="Play"
android:textSize="30sp" />
<Button
android:id="@+id/main_bt_pause"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="20dp"
android:text="Pause"
android:textSize="30sp" />
<Button
android:id="@+id/main_bt_previous"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="20dp"
android:text="Previous"
android:textSize="30sp" />
<Button
android:id="@+id/main_bt_next"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="20dp"
android:text="Next"
android:textSize="30sp" />
</LinearLayout>
小结
同一个服务，可以被多次绑定，然后真正功能实现者在MediaBinder中。
参考文章
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