新增蓝牙打印机操作

app/src/main/java/chaoran/business/engine/BlueToothWrapperEngine.java

@@ -0,0 +1,135 @@
+package chaoran.business.engine;
+
+/*
+ **********************************************
+ *      DATE           PERSON       REASON
+ *    2021-02-19          FXY        Created
+ **********************************************
+ */
+
+
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothDevice;
+import android.bluetooth.BluetoothSocket;
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.widget.Toast;
+import chaoran.business.engine.entity.BlueToothSetting;
+import chaoran.business.engine.entity.Setting;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.util.UUID;
+
+public abstract class BlueToothWrapperEngine implements PrintEngine {
+
+    //打印驱动标志
+    protected static final int PRINT_TYPE = 1664;
+
+    //蓝牙标识
+    private UUID uuid;
+
+    //上下文
+    private Context context;
+
+    //蓝牙适配器
+    protected BluetoothAdapter bluetoothAdapter;
+    //蓝牙socket对象
+    private BluetoothSocket bluetoothSocket;
+
+    //开启蓝牙且连接设备
+    public abstract void startThenConnect();
+
+    //关闭蓝牙
+    public abstract void close();
+
+    //获取绑定的设备
+    public abstract BluetoothDevice getBoundDevice();
+
+    public BlueToothWrapperEngine(Context context) {
+        this.context = context;
+        this.bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
+        this.uuid = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
+    }
+
+    //蓝牙打印机打印操作
+    @Override
+    public void print(File file) {
+        BluetoothDevice boundDevice = getBoundDevice();
+        //先获取连接上的设备继续操作
+        if (null == boundDevice) {
+            Toast.makeText(context, "蓝牙未连接设备或者连接的设备不是打印机", Toast.LENGTH_LONG).show();
+            return;
+        }
+        new PrintThread(boundDevice, file).start();
+    }
+
+    @Override
+    public Setting getSetting() {
+        SharedPreferences sharedPreferences = context.getSharedPreferences("BlueToothEngine", Context.MODE_PRIVATE);
+        String name = sharedPreferences.getString("name", "");
+        String address = sharedPreferences.getString("address", "");
+        return new BlueToothSetting(name, address);
+    }
+
+    @Override
+    public boolean saveSetting(Setting s) {
+        BlueToothSetting blueToothSetting = (BlueToothSetting) s;
+        SharedPreferences sharedPreferences = context.getSharedPreferences("BlueToothEngine", Context.MODE_PRIVATE);
+        SharedPreferences.Editor edit = sharedPreferences.edit();
+        edit.putString("name", blueToothSetting.getName());
+        edit.putString("address", blueToothSetting.getAddress());
+        edit.commit();
+        return true;
+    }
+
+
+    /**
+     * 连接为客户端
+     */
+    private class PrintThread extends Thread {
+
+        private File file;
+
+        public PrintThread(BluetoothDevice device, File file) {
+            this.file = file;
+            try {
+                bluetoothSocket = device.createRfcommSocketToServiceRecord(uuid);
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+        }
+
+        public void run() {
+            //取消的发现,因为它将减缓连接
+            bluetoothAdapter.cancelDiscovery();
+            OutputStream outputStream = null;
+            FileInputStream fileInputStream = null;
+            try {
+                //连接socket
+                bluetoothSocket.connect();
+                //连接成功获取输出流
+                outputStream = bluetoothSocket.getOutputStream();
+                fileInputStream = new FileInputStream(file);
+                byte[] data = new byte[1024];
+                int number;
+                while ((number = fileInputStream.read(data)) != -1) {
+                    outputStream.write(data, 0, number);
+                    outputStream.flush();
+                }
+                fileInputStream.close();
+                outputStream.close();
+            } catch (Exception connectException) {
+                try {
+                    fileInputStream.close();
+                    outputStream.close();
+                    bluetoothSocket.close();
+                } catch (Exception closeException) {
+                    closeException.printStackTrace();
+                }
+            }
+        }
+    }
+}