1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.serialchat;
18
19import android.app.Activity;
20import android.content.Context;
21import android.hardware.SerialManager;
22import android.hardware.SerialPort;
23import android.os.Bundle;
24import android.os.Handler;
25import android.os.Message;
26import android.os.ParcelFileDescriptor;
27import android.view.KeyEvent;
28import android.view.View;
29import android.view.inputmethod.EditorInfo;
30import android.util.Log;
31import android.widget.EditText;
32import android.widget.TextView;
33
34import java.nio.ByteBuffer;
35import java.io.IOException;
36
37public class SerialChat extends Activity implements Runnable, TextView.OnEditorActionListener {
38
39    private static final String TAG = "SerialChat";
40
41    private TextView mLog;
42    private EditText mEditText;
43    private ByteBuffer mInputBuffer;
44    private ByteBuffer mOutputBuffer;
45    private SerialManager mSerialManager;
46    private SerialPort mSerialPort;
47    private boolean mPermissionRequestPending;
48
49    private static final int MESSAGE_LOG = 1;
50
51    @Override
52    public void onCreate(Bundle savedInstanceState) {
53        super.onCreate(savedInstanceState);
54
55        mSerialManager = (SerialManager)getSystemService(Context.SERIAL_SERVICE);
56        setContentView(R.layout.serial_chat);
57        mLog = (TextView)findViewById(R.id.log);
58        mEditText = (EditText)findViewById(R.id.message);
59        mEditText.setOnEditorActionListener(this);
60
61        if (false) {
62            mInputBuffer = ByteBuffer.allocateDirect(1024);
63            mOutputBuffer = ByteBuffer.allocateDirect(1024);
64        } else {
65            mInputBuffer = ByteBuffer.allocate(1024);
66            mOutputBuffer = ByteBuffer.allocate(1024);
67        }
68    }
69
70    @Override
71    public void onResume() {
72        super.onResume();
73
74        String[] ports = mSerialManager.getSerialPorts();
75        if (ports != null && ports.length > 0) {
76            try {
77                mSerialPort = mSerialManager.openSerialPort(ports[0], 115200);
78                if (mSerialPort != null) {
79                    new Thread(this).start();
80                }
81            } catch (IOException e) {
82            }
83        }
84
85    }
86
87    @Override
88    public void onPause() {
89        super.onPause();
90
91    }
92
93    @Override
94    public void onDestroy() {
95        if (mSerialPort != null) {
96            try {
97                mSerialPort.close();
98            } catch (IOException e) {
99            }
100            mSerialPort = null;
101        }
102        super.onDestroy();
103    }
104
105    public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
106        if (/* actionId == EditorInfo.IME_ACTION_DONE && */ mSerialPort != null) {
107            try {
108                String text = v.getText().toString();
109                Log.d(TAG, "write: " + text);
110                byte[] bytes = text.getBytes();
111                mOutputBuffer.clear();
112                mOutputBuffer.put(bytes);
113                mSerialPort.write(mOutputBuffer, bytes.length);
114            } catch (IOException e) {
115                Log.e(TAG, "write failed", e);
116            }
117            v.setText("");
118            return true;
119        }
120        Log.d(TAG, "onEditorAction " + actionId + " event: " + event);
121        return false;
122    }
123
124    public void run() {
125        Log.d(TAG, "run");
126        int ret = 0;
127        byte[] buffer = new byte[1024];
128        while (ret >= 0) {
129            try {
130                Log.d(TAG, "calling read");
131                mInputBuffer.clear();
132                ret = mSerialPort.read(mInputBuffer);
133                Log.d(TAG, "read returned " + ret);
134                mInputBuffer.get(buffer, 0, ret);
135            } catch (IOException e) {
136                Log.e(TAG, "read failed", e);
137                break;
138            }
139
140            if (ret > 0) {
141                Message m = Message.obtain(mHandler, MESSAGE_LOG);
142                String text = new String(buffer, 0, ret);
143                Log.d(TAG, "chat: " + text);
144                m.obj = text;
145                mHandler.sendMessage(m);
146            }
147        }
148        Log.d(TAG, "thread out");
149    }
150
151   Handler mHandler = new Handler() {
152        @Override
153        public void handleMessage(Message msg) {
154            switch (msg.what) {
155                case MESSAGE_LOG:
156                    mLog.setText(mLog.getText() + (String)msg.obj);
157                    break;
158             }
159        }
160    };
161}
162
163
164