串口通信apk原码软件

/* * Copyright (C) 2011 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.android.serialchat; import android.app.Activity; import android.content.Context; import android.hardware.SerialManager; import android.hardware.SerialPort; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.os.ParcelFileDescriptor; import android.view.KeyEvent; import android.view.View; import android.view.inputmethod.EditorInfo; import android.util.Log; import android.widget.EditText; import android.widget.TextView; import java.nio.ByteBuffer; import java.io.IOException; public class SerialChat extends Activity implements Runnable, TextView.OnEditorActionListener { private static final String TAG = "SerialChat"; private TextView mLog; private EditText mEditText; private ByteBuffer mInputBuffer; private ByteBuffer mOutputBuffer; private SerialManager mSerialManager; private SerialPort mSerialPort; private boolean mPermissionRequestPending; private static final int MESSAGE_LOG = 1; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mSerialManager = (SerialManager)getSystemService(Context.SERIAL_SERVICE); setContentView(R.layout.serial_chat); mLog = (TextView)findViewById(R.id.log); mEditText = (EditText)findViewById(R.id.message); mEditText.setOnEditorActionListener(this); if (false) { mInputBuffer = ByteBuffer.allocateDirect(1024); mOutputBuffer = ByteBuffer.allocateDirect(1024); } else { mInputBuffer = ByteBuffer.allocate(1024); mOutputBuffer = ByteBuffer.allocate(1024); } } @Override public void onResume() { super.onResume(); String[] ports = mSerialManager.getSerialPorts(); if (ports != null && ports.length > 0) { try { mSerialPort = mSerialManager.openSerialPort("/dev/ttyS4", 115200); Log.d(TAG, "mSerialPort"+mSerialPort); if (mSerialPort != null) { new Thread(this).start(); } } catch (IOException e) { } } } @Override public void onPause() { super.onPause(); } @Override public void onDestroy() { if (mSerialPort != null) { try { mSerialPort.close(); } catch (IOException e) { } mSerialPort = null; } super.onDestroy(); } public boolean onEditorAction(TextView v, int actionId, KeyEvent event) { if (/* actionId == EditorInfo.IME_ACTION_DONE && */ mSerialPort != null) { try { String text = v.getText().toString(); Log.d(TAG, "write: " + text); byte[] bytes = text.getBytes(); mOutputBuffer.clear(); mOutputBuffer.put(bytes); mSerialPort.write(mOutputBuffer, bytes.length); } catch (IOException e) { Log.e(TAG, "write failed", e); } v.setText(""); return true; } Log.d(TAG, "onEditorAction " + actionId + " event: " + event); return false; } public void run() { Log.d(TAG, "run"); int ret = 0; byte[] buffer = new byte[1024]; while (ret >= 0) { try { Log.d(TAG, "calling read"); mInputBuffer.clear(); ret = mSerialPort.read(mInputBuffer); Log.d(TAG, "read returned " + ret); mInputBuffer.get(buffer, 0, ret); } catch (IOException e) { Log.e(TAG, "read failed", e); break; } if (ret > 0) { Message m = Message.obtain(mHandler, MESSAGE_LOG); String text = new String(buffer, 0, ret); Log.d(TAG, "chat: " + text); m.obj = text; mHandler.sendMessage(m); } } Log.d(TAG, "thread out"); } Handler mHandler = new Handler() { @Override public void handleMessage(Message msg) { switch (msg.what) { case MESSAGE_LOG: mLog.setText(mLog.getText() + (String)msg.obj); break; } } }; }