我的Android登录功能有问题，我正在使用Android设备4.1 ....当我运行我的应用程序时，它会立即终止并且控制台显示错误：
以下是我的代码：请提供建议
public class Signup extends Activity implements OnClickListener {
// IP address where to send data
String ServerIP = "192.168.1.51";
EditText ed_employee_username,ed_employee_password;
EditText ed_new_username,ed_new_password,ed_confirm_password;
Button btn_signup,btn_cancle_signup;
String e_username,e_password,n_username,n_password,c_password,blank = "";
String start,code,end,data;
Socket client,clientSocket;
PrintWriter printwriter;
DB_Adapter database;
ServerSocket serverSocket;
InputStreamReader inputStreamReader;
BufferedReader bufferedReader;
String employee_username_padd,employee_password_padd,IMEI,msg,result,username;
Intent i;
@Override
// Used for Oncreate method
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_signup);
ed_employee_username = (EditText)findViewById(R.id.ed_employee_username);
ed_employee_password = (EditText)findViewById(R.id.ed_employee_password);
ed_new_username = (EditText)findViewById(R.id.ed_new_username);
ed_new_password = (EditText)findViewById(R.id.ed_new_password);
ed_confirm_password = (EditText)findViewById(R.id.ed_confirm_password);
database = new DB_Adapter(getApplicationContext(), "WBS", null, 1);
btn_signup = (Button)findViewById(R.id.btn_signup);
btn_cancle_signup = (Button)findViewById(R.id.btn_cancle_signup);
btn_signup.setOnClickListener(this);
btn_cancle_signup.setOnClickListener(this);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.signup, menu);
return true;
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId())
{
case R.id.btn_signup:
e_username = ed_employee_username.getText().toString();
e_password = ed_employee_password.getText().toString();
n_username = ed_new_username.getText().toString();
n_password = ed_new_password.getText().toString();
c_password = ed_confirm_password.getText().toString();
if(e_username.equals(blank))
{
Toast.makeText(getApplicationContext(), "Please enter Employee Username", Toast.LENGTH_SHORT).show();
}
else if(e_password.equals(blank) || e_password.length() <6)
{
ed_employee_password.setError("You must have 6 Character’s in Password");
return;
}
else if(n_username.equals(blank))
{
Toast.makeText(getApplicationContext(), "Please enter New Username", Toast.LENGTH_SHORT).show();
}
else if(n_password.equals(blank) || n_password.length() <6)
{
ed_new_password.setError("You must have 6 Character’s in Password");
return;
}
else if(c_password.equals(blank) || c_password.length() <6)
{
ed_confirm_password.setError("You must have 6 Character’s in Password");
return;
}
else if(n_password.equals(c_password))
{
TelephonyManager tm = (TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);
IMEI = tm.getDeviceId();//imei no is captured
send();
receive();
if(username.equals(e_username))
{
database.signup_detail(n_username, n_password, IMEI);
Toast.makeText(getApplicationContext(), " New User Registered Successfully", Toast.LENGTH_SHORT).show();
i = new Intent(getApplicationContext(),Login.class);
startActivity(i);
finish();
}
else
{
Toast.makeText(getApplicationContext(), "User is already registered with another Mobile Device", Toast.LENGTH_SHORT).show();
}
}
else
{
Toast.makeText(getApplicationContext(), "New Password and Confirm Password does not match", Toast.LENGTH_SHORT).show();
}
break;
case R.id.btn_cancle_signup:
i = new Intent(getApplicationContext(),Login.class);
startActivity(i);
finish();
break;
}
}
public void send()
{
Toast.makeText(getApplicationContext(), "in send...", Toast.LENGTH_SHORT).show();
start = "@STR";
code = "01";
end = "000$";
//Padding logic
employee_username_padd = e_username;
employee_password_padd = e_password;
int fixlen= 10;
int eidlen= e_username.length();
int epasslen= e_password.length();
if(fixlen>eidlen)
{
for(int i=0;i<(fixlen-eidlen);i++)
{
employee_username_padd="*"+employee_username_padd;
}
}
if(fixlen>epasslen)
{
for(int i=0;i<(fixlen-epasslen);i++)
{
employee_password_padd="*"+employee_password_padd;
}
}
data = start+code+employee_username_padd+employee_password_padd+IMEI+end;
try {
client=new Socket(ServerIP,2222);
printwriter=new PrintWriter(client.getOutputStream(),true);
printwriter.write(data);
printwriter.flush();
printwriter.close();
//receive();
client.close();
} catch (UnknownHostException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public String receive()
{
try {
//Toast.makeText(getApplicationContext(), "in receive", Toast.LENGTH_SHORT).show();
serverSocket = new ServerSocket(1111);
clientSocket = serverSocket.accept();
inputStreamReader = new InputStreamReader(clientSocket.getInputStream());
bufferedReader = new BufferedReader(inputStreamReader); //get the client message
msg = bufferedReader.readLine();
Toast.makeText(getApplicationContext(), msg, Toast.LENGTH_LONG).show();
String start1= msg.substring(0,4);
String code1= msg.substring(4, 6);
String result1= msg.substring(6, 16);
String end1= msg.substring(16, 20);
if(start1.equals("@STR") && code1.equals("01") && end1.equals("999$"))
{
/*Toast.makeText(getApplicationContext(), start1, Toast.LENGTH_SHORT).show();
Toast.makeText(getApplicationContext(), code1, Toast.LENGTH_SHORT).show();
Toast.makeText(getApplicationContext(), result1, Toast.LENGTH_SHORT).show();
Toast.makeText(getApplicationContext(), end1, Toast.LENGTH_SHORT).show();*/
result = result1;
remove_padding();
}else
{
/*Toast.makeText(getApplicationContext(), "in else"+start1, Toast.LENGTH_SHORT).show();
Toast.makeText(getApplicationContext(), "in else"+code1, Toast.LENGTH_SHORT).show();
Toast.makeText(getApplicationContext(), "in else"+result1, Toast.LENGTH_SHORT).show();
Toast.makeText(getApplicationContext(), "in else"+end1, Toast.LENGTH_SHORT).show();*/
result = result1;
remove_padding();
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return result;
}
public String remove_padding()
{
//String starusername=usernamepasswordIMEI.substring(0,10);
char star='*';
int count=0;
if(result.charAt(0) == star)
{
for(int i=0;i<result.length();i++)
{
if(result.charAt(i) == star)
{
count++;
}
/*break;*/
}//end for
username=result.substring(count,result.length());
}
else
{
System.out.println("user name String doesn't start with *");
username=result;
}
return username;
}
运行后显示以下错误：
07-18 15:13:09.502: E/AndroidRuntime(32249): FATAL EXCEPTION: main
07-18 15:13:09.502: E/AndroidRuntime(32249): android.os.NetworkOnMainThreadException
07-18 15:13:09.502: E/AndroidRuntime(32249): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)
07-18 15:13:09.502: E/AndroidRuntime(32249): at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84)
07-18 15:13:09.502: E/AndroidRuntime(32249): at libcore.io.IoBridge.connectErrno(IoBridge.java:127)
07-18 15:13:09.502: E/AndroidRuntime(32249): at libcore.io.IoBridge.connect(IoBridge.java:112)
07-18 15:13:09.502: E/AndroidRuntime(32249): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192)
07-18 15:13:09.502: E/AndroidRuntime(32249): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
07-18 15:13:09.502: E/AndroidRuntime(32249): at java.net.Socket.startupSocket(Socket.java:566)
07-18 15:13:09.502: E/AndroidRuntime(32249): at java.net.Socket.tryAllAddresses(Socket.java:127)
07-18 15:13:09.502: E/AndroidRuntime(32249): at java.net.Socket.<init>(Socket.java:177)
07-18 15:13:09.502: E/AndroidRuntime(32249): at java.net.Socket.<init>(Socket.java:149)
07-18 15:13:09.502: E/AndroidRuntime(32249): at com.ami.wbs.Signup.send(Signup.java:161)
07-18 15:13:09.502: E/AndroidRuntime(32249): at com.ami.wbs.Signup.onClick(Signup.java:102)
07-18 15:13:09.502: E/AndroidRuntime(32249): at android.view.View.performClick(View.java:4117)
07-18 15:13:09.502: E/AndroidRuntime(32249): at android.view.View$PerformClick.run(View.java:17041)
07-18 15:13:09.502: E/AndroidRuntime(32249): at android.os.Handler.handleCallback(Handler.java:615)
07-18 15:13:09.502: E/AndroidRuntime(32249): at android.os.Handler.dispatchMessage(Handler.java:92)
07-18 15:13:09.502: E/AndroidRuntime(32249): at android.os.Looper.loop(Looper.java:137)
07-18 15:13:09.502: E/AndroidRuntime(32249): at android.app.ActivityThread.main(ActivityThread.java:4747)
07-18 15:13:09.502: E/AndroidRuntime(32249): at java.lang.reflect.Method.invokeNative(Native Method)
07-18 15:13:09.502: E/AndroidRuntime(32249): at java.lang.reflect.Method.invoke(Method.java:511)
07-18 15:13:09.502: E/AndroidRuntime(32249): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
07-18 15:13:09.502: E/AndroidRuntime(32249)`enter code here`: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
07-18 15:13:09.502: E/AndroidRuntime(32249): at dalvik.system.NativeStart.main(Native Method)
答案 0 :(得分：0)
您无法使用主UI线程中的网络操作。要做到这一点，你必须在不同的线程中使用它们（更好地使用AsyncTask）
有关详情，请查看文档here。来自doc
应用程序尝试执行时抛出的异常 在其主线程上进行网络操作。
这仅适用于针对Honeycomb SDK或。的应用程序 更高。允许使用早期SDK版本的应用程序 他们的主要事件循环线程上的网络，但它是很重要的 泄气。请参阅文档设计响应性。
另见StrictMode。
答案 1 :(得分：0)
asynctask。（临时解决方案）在您的活动中添加此代码
ThreadPolicy tp = ThreadPolicy.LAX;
StrictMode.setThreadPolicy(tp);
因为这是Gingerbread(API)中的一个问题。您也可以将targetSDK更改为9.但这不是一个好的解决方案。