Android串口通信（基于Tiny6410平台）

友善之臂的Android系统有他们自己编写的一个串口通信程序，网上没有找到他的源代码，而且界面操作不在一个界面，不是很方便，这里我自己写了一个粗糙点的串口通信程序。

同样这里还是调用友善之臂的friendlyarm-hardware.so库文件。

在Android工程文件下面加入com.friendlyarm.androidSDK包，在其下添加HardwareControler.java。下面我把我做的截图发上来。

                                                 

主程序代码：

1. package geekle.lab;
2. import android.app.Activity;
3. import android.os.Bundle;
4. import android.os.Handler;
5. import android.os.Message;
6. import android.text.method.ScrollingMovementMethod;
7. import android.util.Log;
8. import android.view.View;
9. import android.view.View.OnClickListener;
10. import android.view.WindowManager;
11. import android.widget.AdapterView;
12. import android.widget.ArrayAdapter;
13. import android.widget.Button;
14. import android.widget.EditText;
15. import android.widget.Spinner;
16. import android.widget.TextView;
17. import android.widget.Toast;
18. import com.friendlyarm.AndroidSDK.HardwareControler;
19. public class SerialPortActivity extends Activity
20. {
21. private static final String[] serial_port={"/dev/s3c2410_serial0","/dev/s3c2410_serial1","/dev/s3c2410_serial2"};
22. private static final String[] baud_rate={"4800","9600","19200","115200"};
23. TextView chooseserialPortView;
24. TextView choosebaudRateView;
25. TextView commucationView;
26. EditText editmsg;
27. private Button stopButton;
28. private Button sendButton;
29. private Spinner choose_serialport;
30. private Spinner choose_baudrate;
31. private ArrayAdapter<String> serialportAdapter;
32. private ArrayAdapter<String> baudrateAdaptera;
33. private int fd = 0;
34. String thread = "readThread";
35. String choosed_serial = "/dev/s3c2410_serial2";
36. int choosed_buad = 19200;
37. byte[] buf= new byte[300];
38. /** Called when the activity is first created. */
39. @Override
40. public void onCreate(Bundle savedInstanceState)
41. {
42. super.onCreate(savedInstanceState);
43. setContentView(R.layout.main);
44. getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);//设置全屏
45. chooseserialPortView = (TextView)findViewById(R.id.choose_serialPort_text);
46. choose_serialport = (Spinner)findViewById(R.id.choose_seriaPort_spinner);
47. chooseserialPortView = (TextView)findViewById(R.id.choose_baudRate_text);
48. choose_baudrate = (Spinner)findViewById(R.id.choose_baudRate_spinner);
49. serialportAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_dropdown_item_1line,serial_port);//建立下拉控件的适配器
50. baudrateAdaptera = new ArrayAdapter<String>(this, android.R.layout.simple_dropdown_item_1line,baud_rate);
51. serialportAdapter.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
52. baudrateAdaptera.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
53. choose_serialport.setAdapter(serialportAdapter);//连接控件和适配器
54. choose_baudrate.setAdapter(baudrateAdaptera);
55. choose_serialport.setSelection(2);
56. choose_baudrate.setSelection(2);
57. choose_serialport.setOnItemSelectedListener(new Spinner.OnItemSelectedListener()
58. {
59. public void onItemSelected(AdapterView<?> arg0, View arg1,
60. int arg2, long arg3) {
61. // TODO Auto-generated method stub
62. choosed_serial = serial_port[arg2];
63. }
64. public void onNothingSelected(AdapterView<?> arg0) {
65. // TODO Auto-generated method stub
66. }
67. });
68. choose_baudrate.setOnItemSelectedListener(new Spinner.OnItemSelectedListener()
69. {
70. public void onItemSelected(AdapterView<?> arg0, View arg1,
71. int arg2, long arg3) {
72. // TODO Auto-generated method stub
73. choosed_buad = Integer.parseInt(baud_rate[arg2]);
74. }
75. public void onNothingSelected(AdapterView<?> arg0) {
76. // TODO Auto-generated method stub
77. }
78. });
79. fd = HardwareControler.openSerialPort(choosed_serial,choosed_buad, 8, 1);//打开串口
80. if (fd != -1) {
81. Toast.makeText(getApplicationContext(), getResources().getString(R.string.open_serial_success)+choosed_serial, 1).show();
82. } else {
83. Toast.makeText(this, getResources().getString(R.string.open_fail), 1).show();
84. }
85. stopButton = (Button)findViewById(R.id.stopButton);
86. stopButton.setOnClickListener(new ClickEvent());
87. sendButton = (Button)findViewById(R.id.sendButton);//发送消息
88. sendButton.setOnClickListener(new OnClickListener() {
89. public void onClick(View arg0) {
90. // TODO Auto-generated method stub
91. HardwareControler.write(fd, editmsg.getText().toString().getBytes());
92. commucationView.append(editmsg.getText()+"\n");
93. }
94. });
95. commucationView = (TextView)findViewById(R.id.commucation_window);
96. commucationView.setMovementMethod(ScrollingMovementMethod.getInstance()); //让textview实现滚动
97. editmsg = (EditText)findViewById(R.id.editmsg);
98. new readThread().start();//开始串口的监听线程
99. }
100. public class ClickEvent implements Button.OnClickListener//退出
101. {
102. public void onClick(View arg0) {
103. // TODO Auto-generated method stub
104. android.os.Process.killProcess(android.os.Process.myPid());
105. System.exit(0);
106. }
107. }
108. Handler handler = new Handler() {
109. public void handleMessage(Message msg) {
110. switch (msg.arg1) {
111. case 0:
112. int len = HardwareControler.read(fd, buf, 300);
113. String string = new String(buf, 0, len);
114. commucationView.append(string+"\n");
115. new readThread().start();//处理完消息后立即开启监听线程
116. Log.d(thread,"接收到数据，新线程启动");
117. break;
118. case 1:
119. HardwareControler.setLedState(1, 0);
120. new readThread().start();
121. //                Log.d(thread,"没有数据，新线程启动");
122. break;
123. default:
124. break;
125. }
126. }
127. };
128. class readThread extends Thread//读取串口信息线程
129. {
130. public void run()
131. {
132. Message msg = new Message();
133. HardwareControler.setLedState(0, 0);
134. if (HardwareControler.select(fd,5, 0)==1) {
135. msg.arg1 = 0;
136. }
137. else {
138. msg.arg1 =1;
139. HardwareControler.setLedState(0, 1);
140. }
141. handler.sendMessage(msg);
142. }
143. }
144. }

main.xml代码：

1. <?xml version="1.0" encoding="utf-8"?>
2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
3. android:layout_width="fill_parent"
4. android:layout_height="fill_parent"
5. android:orientation="vertical" >
6. <TextView
7. android:id="@+id/choose_serialPort_text"
8. android:layout_width="fill_parent"
9. android:layout_height="wrap_content"
10. android:text="@+string/chooseserialPort" />
11. <Spinner
12. android:id="@+id/choose_seriaPort_spinner"
13. android:layout_width="wrap_content"
14. android:layout_height="40dp" >
15. </Spinner>
16. <TextView
17. android:id="@+id/choose_baudRate_text"
18. android:layout_width="wrap_content"
19. android:layout_height="wrap_content"
20. android:text="@+string/choosebaudRate" />
21. <Spinner
22. android:id="@+id/choose_baudRate_spinner"
23. android:layout_width="wrap_content"
24. android:layout_height="40dp" >
25. </Spinner>
26. <TextView
27. android:id="@+id/commucation_window"
28. android:layout_width="fill_parent"
29. android:layout_height="190dp" >
30. </TextView>
31. <EditText
32. android:id="@+id/editmsg"
33. android:layout_width="fill_parent"
34. android:layout_height="wrap_content"
35. android:hint="edit here" />
36. <LinearLayout
37. android:layout_width="fill_parent"
38. android:layout_height="wrap_content"
39. android:layout_weight="1"
40. android:orientation="horizontal" >
41. <Button
42. android:id="@+id/sendButton"
43. android:layout_width="wrap_content"
44. android:layout_height="wrap_content"
45. android:layout_weight="1"
46. android:text="@+string/send" />
47. <Button
48. android:id="@+id/stopButton"
49. android:layout_width="wrap_content"
50. android:layout_height="wrap_content"
51. android:layout_weight="1"
52. android:text="@string/stopButton" />
53. </LinearLayout>
54. </LinearLayout>