Android P实现minicap客户端和解析minicap数据

àì夳堔傛蜴生んèń 2022-01-23 01:09 517阅读 0赞

minicap的socket方式：UNIX domain sockets。所以连接minicap的方式为：LocalSocket

### 一、运行minicap ###

minicap运行后，建立socket服务端。

minicap的编译和运行请参照文章：  
[https://blog.csdn.net/Sunxiaolin2016/article/details/90697555][https_blog.csdn.net_Sunxiaolin2016_article_details_90697555]

### 二、Android代码建立客户端连接minicap，并解析minicap数据 ###

public class MainActivity extends AppCompatActivity { 
    
        //UNIX domain sockets service name(@minicap)
        private static final String SOCKET_ADDRESS = "minicap";
    
        //Locak socket
        LocalSocket mMinicapClientSocket = null;
        LocalSocketAddress mAddr;
    
        //Image UI , to show a image from minicap data
        Bitmap mBitmap = null;
        ImageView mImage;
    
        //Image data size
        public static final int MAX_FRAME = 50000;
        public static final int FRAME_SIZE = 1024 * 1024;
        boolean HEAD_ONCE_FLAG = true;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) { 
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
    
            mImage = findViewById(R.id.imageView);
    
    		// new LocalSocket
            mMinicapClientSocket = new LocalSocket();
            mAddr = new LocalSocketAddress(SOCKET_ADDRESS,LocalSocketAddress.Namespace.ABSTRACT);
    
            //connect minicap
            connectSocket();
        }
    
        private void connectSocket() { 
            new Thread(new Runnable() { 
                @Override
                public void run() { 
                    try { 
                        //Connect minicao
                        mMinicapClientSocket.connect(mAddr);
    
                        InputStream inputStream = mMinicapClientSocket.getInputStream();
                        Log.i("LocalSocketDemo", "update Data");
                        int actualFrameSize = 0;
                        byte[] frameArr = new byte[MAX_FRAME];
    
                        byte[] bytes = new byte[FRAME_SIZE];
                        byte[] fourbts = new byte[4];
                        int hasread = 0, destSt = 0;
                        //读取socket数据，读取方式为阻塞方式
                        //minicap根据屏幕UI有更新是发送截屏数据，UI不更新不发送数据
                        while (((hasread = inputStream.read(bytes)) > 0)) { 
                            Log.i("LocalSocketDemo", "while read Data");
                            if (HEAD_ONCE_FLAG) {         //第一次只接收header,bytes[24]为空
                                Log.i("LocalSocketDemo", "read Data,HEAD_ONCE_FLAG is true ");
                                HEAD_ONCE_FLAG = false;
                            } else {             //不是第一次发送，就不含有Header，头四个字节直接表示Frame size
                                Log.i("LocalSocketDemo", "read Data,HEAD_ONCE_FLAG is false destSt=" + destSt);
                                if (destSt <= 0) { 
                                    fourbts[0] = bytes[3];
                                    fourbts[1] = bytes[2];
                                    fourbts[2] = bytes[1];
                                    fourbts[3] = bytes[0];
                                    actualFrameSize = Util.bytes2int(fourbts);
                                    Log.i("LocalSocketDemo", "actualFrameSize = " + actualFrameSize);
                                    if (actualFrameSize > MAX_FRAME || actualFrameSize <= 0) { 
                                        Log.i("LocalSocketDemo", "continue,actualFrameSize = " + actualFrameSize);
                                        continue;
                                    }
    
                                    destSt = copyByteArray(bytes, frameArr, 4, hasread - 1, 0);
    
                                } else { 
                                    destSt = copyByteArray(bytes, frameArr, 0, hasread - 1, destSt);
                                    if (destSt >= actualFrameSize) {         //已经记录完成一帧
                                        ByteArrayInputStream bais = new ByteArrayInputStream(frameArr, 0, actualFrameSize - 1);
                                        byte[] bytesBitmap = new byte[(int) bais.available()];
                                        bais.read(bytesBitmap, 0, bytesBitmap.length);
                                        //this.bi1 =ImageIO.read(bais);
    
    									//Get Bitmap
                                        mBitmap = BitmapFactory.decodeByteArray(bytesBitmap, 0, bytesBitmap.length);
    									//Update UI
                                        handler.sendEmptyMessageDelayed(0, 0);
                                        bais.close();
                                        destSt = 0;
                                    }
                                }
                            }
                        }
                    } catch (IOException e) { 
                        e.printStackTrace();
                    }
                }
    
            }).start();
        }
    
        private int copyByteArray(byte[] sour, byte[] dest, int sourSt, int sourEn, int destSt){ 
            int k=0;
            for(int i=sourSt; i<=sourEn; i++){ 
                if(destSt+k >= dest.length) continue;
                dest[destSt+k] = sour[i];
                k++;
            }
            return destSt+k;
        }
    }
    
        @Override
        protected void onStop() { 
            super.onStop();
            try { 
                if( null != mMinicapClientSocket){ 
                	//close the localsocket
                    mMinicapClientSocket.close();
                    mMinicapClientSocket = null;
                }
            } catch (IOException e) { 
                e.printStackTrace();
            }
        }
    
    	//Update UI
        Handler handler = new Handler() { 
            public void handleMessage(android.os.Message msg) { 
                switch (msg.what) { 
                    case 0:
                        if(null != mBitmap){ 
                            mImage.setImageBitmap(mBitmap);
                            Log.i("LocalSocketDemo","update Image" );
                        }
                        break;
                }
            }
        };

### 三、总结 ###

1.通过LocalSocket连接minicap服务端；  
2.需要主要截屏的尺寸，如果是1920x1080的尺寸图片数据过大，导致占用太大的内存空间，所以运行minicap的时候需要调整一些截屏图片的尺寸为600x480。  
//start minicap  
adb shell LD\_LIBRARY\_PATH=/data/local/tmp /data/local/tmp/minicap -P 1920x1080@600x480/0  
3.minicap数据的解析需要参考minicap源码，发送的数据格式。

[https_blog.csdn.net_Sunxiaolin2016_article_details_90697555]: https://blog.csdn.net/Sunxiaolin2016/article/details/90697555