本文共 10242 字，大约阅读时间需要 34 分钟。

1.源码示例

代码清单D:\AndroidStudioProject\CpuRun\app\src\main\aidl\com\fadisu\cpurun\service\ICpuMsgCallBack.aidlD:\AndroidStudioProject\CpuRun\app\src\main\aidl\com\fadisu\cpurun\service\ICpuMsgService.aidlD:\AndroidStudioProject\CpuRun\app\src\main\java\com\fadisu\cpurun\fragment\CpuStatusFragment.javaD:\AndroidStudioProject\CpuRun\app\src\main\java\com\fadisu\cpurun\service\CpuMsgService.javaD:\AndroidStudioProject\CpuRun\app\src\main\AndroidManifest.xml

2.AIDL 接口

D:\AndroidStudioProject\CpuRun\app\src\main\aidl\com\fadisu\cpurun\service\ICpuMsgCallBack.aidl

D:\AndroidStudioProject\CpuRun\app\src\main\aidl\com\fadisu\cpurun\service\ICpuMsgService.aidl

ICpuMsgCallBack 回调接口

package com.fadisu.cpurun.service;import java.util.List;interface ICpuMsgCallBack {    void updateCpuUsage(in List
   
     msg);}
   

ICpuMsgService 注册和注销接口

package com.fadisu.cpurun.service;import com.fadisu.cpurun.service.ICpuMsgCallBack;import java.util.List;interface ICpuMsgService {    void registerCallback(ICpuMsgCallBack cb);    void unregisterCallback(ICpuMsgCallBack cb);    void updateCpuUsage(in List
   
     msg);}
   

3.AIDL 服务端

D:\AndroidStudioProject\CpuRun\app\src\main\java\com\fadisu\cpurun\service\CpuMsgService.java

D:\AndroidStudioProject\CpuRun\app\src\main\AndroidManifest.xml

AndroidManifest.xml 注册服务

CpuMsgService.java

服务端主要实现 onBind 的重写，完成 AIDL 绑定接口，然后在调用接口发送数据给客户端

package com.fadisu.cpurun.service;import android.app.Service;import android.content.Context;import android.content.Intent;import android.os.IBinder;import android.os.RemoteCallbackList;import android.os.RemoteException;import android.util.Log;import com.fadisu.cpurun.R;import com.fadisu.cpurun.util.CpuUtils;import com.fadisu.cpurun.util.ProcCpuStatUtil;import java.util.ArrayList;import java.util.List;public class CpuMsgService extends Service {
       public static final String ACTION_CPU_USAGE_START = "action_cpu_usage_start";    public static final String ACTION_CPU_USAGE_END = "action_cpu_usage_end";    private boolean isRun;    private Thread mThread;    private Context mContext;    private ICpuMsgService mICpuMsgService = new MyICpuMsgService();    private final RemoteCallbackList
   
     mCallbackList = new RemoteCallbackList
    
     ();    @Override    public IBinder onBind(Intent intent) {        return (IBinder) mICpuMsgService;    }    @Override    public void onCreate() {        super.onCreate();        mContext = this;        isRun = true;    }    @Override    public int onStartCommand(Intent intent, int flags, int startId) {        if (null == intent) {            return super.onStartCommand(intent, flags, startId);        }        String action = intent.getAction();        if (null == action) {            return super.onStartCommand(intent, flags, startId);        }        if (ACTION_CPU_USAGE_START.equals(action)) {            Log.d("CpuMsgService", "startTask");            startTask();        } else if (ACTION_CPU_USAGE_END.equals(action)) {            Log.d("CpuMsgService", "stopTask");            stopTask();        }        return super.onStartCommand(intent, flags, startId);    }    @Override    public void onDestroy() {        stopTask();        super.onDestroy();    }    private void startTask() {        if (null != mThread) {            return;        }        isRun = true;        mThread = new Thread(new Runnable() {            @Override            public void run() {                while (isRun) {                    List
     
       result = new ArrayList<>();                    result.add(mContext.getString(R.string.cpu_usage) + ProcCpuStatUtil.getCpuUsage());                    result.addAll(CpuUtils.getCpuCurFreq(mContext));                    if (null != mICpuMsgService) {                        try {                            Log.d("CpuMsgService", "getCpuUsage = " + result.get(0));                            mICpuMsgService.updateCpuUsage(result);                        } catch (RemoteException e) {                            //e.printStackTrace();                        }                    }                }            }        });        mThread.start();    }    private void stopTask() {        isRun = false;        if (mThread != null) {            mThread.interrupt();            mThread = null;        }    }    class MyICpuMsgService extends ICpuMsgService.Stub {        @Override        public void registerCallback(ICpuMsgCallBack cb) throws RemoteException {            if (cb != null) {                mCallbackList.register(cb);            }        }        @Override        public void unregisterCallback(ICpuMsgCallBack cb) throws RemoteException {            if (cb != null) {                mCallbackList.unregister(cb);            }        }        @Override        public void updateCpuUsage(List
      
        msg) throws RemoteException {            final int N = mCallbackList.beginBroadcast();            for (int i = 0; i < N; i++) {                try {                    mCallbackList.getBroadcastItem(i).updateCpuUsage(msg);                } catch (RemoteException e) {                    e.printStackTrace();                }            }            mCallbackList.finishBroadcast();        }    }}
      
     
    
   

4.AIDL 客户端

D:\AndroidStudioProject\CpuRun\app\src\main\java\com\fadisu\cpurun\fragment\CpuStatusFragment.java

客户端 bingService就可以监听服务端的消息数据了，并在 updateCpuUsage （）刷新数据

package com.fadisu.cpurun.fragment;import android.content.ComponentName;import android.content.Context;import android.content.Intent;import android.content.ServiceConnection;import android.os.Bundle;import android.os.Handler;import android.os.IBinder;import android.os.Message;import android.os.RemoteException;import android.support.v4.app.Fragment;import android.util.Log;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.ListView;import android.widget.TextView;import com.fadisu.cpurun.R;import com.fadisu.cpurun.adapter.CustomAdapter;import com.fadisu.cpurun.service.CpuMsgService;import com.fadisu.cpurun.service.ICpuMsgCallBack;import com.fadisu.cpurun.service.ICpuMsgService;import java.lang.ref.WeakReference;import java.util.ArrayList;import java.util.List;public class CpuStatusFragment extends Fragment implements CustomAdapter.LayoutView {
       public static final int UPDATE_UI = 0;    private Context mContext;    private List
   
     result;    private CustomAdapter
    
      mCustomAdapter;    private View mView;    private ListView mListView;    private Handler mHandler = null;    private ICpuMsgCallBack mICpuMsgCallBack = new ICpuMsgCallBack.Stub() {        @Override        public void updateCpuUsage(List
     
       list) throws RemoteException {            if (null != list) {                result.clear();                result.addAll(list);                mHandler.sendEmptyMessage(UPDATE_UI);            }        }    };    ;    private ServiceConnection mConnection = new ServiceConnection() {        @Override        public void onServiceConnected(ComponentName componentName, IBinder iBinder) {            try {                ICpuMsgService mICpuMsgService = ICpuMsgService.Stub.asInterface(iBinder);                mICpuMsgService.registerCallback(mICpuMsgCallBack);                Log.d("CpuMsgService", "onServiceConnected");            } catch (Exception e) {                e.printStackTrace();            }        }        @Override        public void onServiceDisconnected(ComponentName componentName) {            Log.d("CpuMsgService", "onServiceDisconnected");        }    };    @Override    public void onAttach(Context context) {        super.onAttach(context);        mContext = context;    }    @Override    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {        mView = inflater.inflate(R.layout.fragment_base, container, false);        initViews();        initValues();        initListeners();        return mView;    }    @Override    public void onResume() {        bindService();        super.onResume();    }    @Override    public void onStop() {        unBindService();        super.onStop();    }    private void initViews() {        mListView = (ListView) mView.findViewById(R.id.listview);    }    private void initValues() {        mHandler = new MyHandler(this);        result = new ArrayList<>();        result.add("ServiceConnection .....");        mCustomAdapter = new CustomAdapter
      
       (result);        mListView.setAdapter(mCustomAdapter);        mHandler.sendEmptyMessage(UPDATE_UI);    }    private void initListeners() {        mCustomAdapter.setLayoutView(this);    }    @Override    public 
       
         View setView(int position, View convertView, ViewGroup parent) {        ViewHolder holder = null;        if (convertView == null) {            convertView = LayoutInflater.from(mContext).inflate(R.layout.item_base, null);            holder = new ViewHolder();            convertView.setTag(holder);            holder.tv_info = (TextView) convertView.findViewById(R.id.tv_info);        } else {            holder = (ViewHolder) convertView.getTag();        }        holder.tv_info.setText(result.get(position));        return convertView;    }    private void bindService() {        Intent intent = new Intent(mContext, CpuMsgService.class);        intent.setAction(CpuMsgService.ACTION_CPU_USAGE_START);        mContext.bindService(intent, mConnection, Context.BIND_AUTO_CREATE);        Log.d("CpuMsgService", "bindService");    }    private void unBindService() {        Intent intent = new Intent(mContext, CpuMsgService.class);        intent.setAction(CpuMsgService.ACTION_CPU_USAGE_START);        mContext.unbindService(mConnection);        Log.d("CpuMsgService", "unBindService");    }    private static class MyHandler extends Handler {
           WeakReference
        
          mActivity; public MyHandler(CpuStatusFragment activity) { mActivity = new WeakReference
         
          (activity); } @Override public void handleMessage(Message msg) { CpuStatusFragment activity = mActivity.get(); switch (msg.what) { case UPDATE_UI: activity.mCustomAdapter.updateData((ArrayList
          
           ) activity.result); break; default: break; } } } class ViewHolder { TextView tv_info; }}
          
         
        
       
      
     
    
   

4.UI显示