我通过SOAP Web服务使用MySQL数据库连接开发了一个登录表单。在这里，我验证我的EditText（用户名，密码）框。这是一个基本问题，但我无法为此开发代码。请帮帮我。
我的代码是：
Button login = (Button) findViewById(R.id.btn_login);
login.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
loginAction();
}
});
}
private void loginAction(){
SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);
EditText userName = (EditText) findViewById(R.id.tf_userName);
String user_Name = userName.getText().toString();
EditText userPassword = (EditText) findViewById(R.id.tf_password);
String user_Password = userPassword.getText().toString();
//Pass value for userName variable of the web service
PropertyInfo unameProp =new PropertyInfo();
unameProp.setName("userName");//Define the variable name in the web service method
unameProp.setValue(user_Name);//set value for userName variable
unameProp.setType(String.class);//Define the type of the variable
request.addProperty(unameProp);//Pass properties to the variable
//Pass value for Password variable of the web service
PropertyInfo passwordProp =new PropertyInfo();
passwordProp.setName("password");
passwordProp.setValue(user_Password);
passwordProp.setType(String.class);
request.addProperty(passwordProp);
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope.setOutputSoapObject(request);
HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
try{
androidHttpTransport.call(SOAP_ACTION, envelope);
SoapPrimitive response = (SoapPrimitive)envelope.getResponse();
String status = response.toString();
TextView result = (TextView) findViewById(R.id.tv_status);
result.setText(response.toString());
**if(status.equals("Success!"))
{
// ADD to save and read next time
String strUserName = userName.getText().toString().trim();
String strPassword = userPassword.getText().toString().trim();
if (null == strUserName || strUserName.length() == 0)
{
// showToast("Enter Your Name");
userName.setError( "username is required!" );
} else if (null == strPassword || strPassword.length() == 0)
{
// showToast("Enter Your Password");
userPassword.setError( "password is required!" );
} else
{
if (chkRememberMe.isChecked())
{
SharedPreferences loginPreferences = getSharedPreferences(SPF_NAME, Context.MODE_PRIVATE);
loginPreferences.edit().putString(USERNAME, strUserName).putString(PASSWORD, strPassword).commit();
} else
{
SharedPreferences loginPreferences = getSharedPreferences(SPF_NAME, Context.MODE_PRIVATE);
loginPreferences.edit().clear().commit();
}
Intent intent = new Intent(Login.this,HomePage.class);
intent.putExtra("username",userName.getText().toString());
startActivity(intent);
}
}**
else
{
Intent i = new Intent(getApplicationContext(), Login.class);
startActivity(i);
}
}
catch(Exception e){
}
}
}
我希望如果单击该按钮，则会先验证EditText，然后再转到下一个Activity。
请帮助。
答案 0 :(得分：0)
声明布尔变量 isValidated 。检查用户名或密码字段是否为空。如果其中任何一个为空，请将isValidated设置为“false”。否则，将isValidated设置为“true”。
现在，在开始下一个活动之前，请检查isValidated的值。 如果是“true”，则启动新的Intent ;如果未经验证，则执行您想要的任何操作（在这种情况下，isValidated的值将为false）。
private void loginAction(){
boolean isUserValidated = true;
boolean isPasswordValidated = true;
SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);
EditText userName = (EditText) findViewById(R.id.tf_userName);
String user_Name = userName.getText().toString();
EditText userPassword = (EditText) findViewById(R.id.tf_password);
String user_Password = userPassword.getText().toString();
//Pass value for userName variable of the web service
PropertyInfo unameProp =new PropertyInfo();
unameProp.setName("userName");//Define the variable name in the web service method
unameProp.setValue(user_Name);//set value for userName variable
unameProp.setType(String.class);//Define the type of the variable
request.addProperty(unameProp);//Pass properties to the variable
//Pass value for Password variable of the web service
PropertyInfo passwordProp =new PropertyInfo();
passwordProp.setName("password");
passwordProp.setValue(user_Password);
passwordProp.setType(String.class);
request.addProperty(passwordProp);
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope.setOutputSoapObject(request);
HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
try{
androidHttpTransport.call(SOAP_ACTION, envelope);
SoapPrimitive response = (SoapPrimitive)envelope.getResponse();
String status = response.toString();
TextView result = (TextView) findViewById(R.id.tv_status);
result.setText(response.toString());
if(status.equals("Success!"))
{
// ADD to save and read next time
String strUserName = userName.getText().toString().trim();
String strPassword = userPassword.getText().toString().trim();
if (null == strUserName || strUserName.length() == 0)
{
// showToast("Enter Your Name");
userName.setError( "username is required!" );
isUserValidated = false;
}
if (null == strPassword || strPassword.length() == 0)
{
// showToast("Enter Your Password");
isPasswordValidated = false;
userPassword.setError( "password is required!" );
}
if(isUserValidated = true && isPasswordValidated = true)
{
if (chkRememberMe.isChecked())
{
SharedPreferences loginPreferences = getSharedPreferences(SPF_NAME, Context.MODE_PRIVATE);
loginPreferences.edit().putString(USERNAME, strUserName).putString(PASSWORD, strPassword).commit();
} else
{
SharedPreferences loginPreferences = getSharedPreferences(SPF_NAME, Context.MODE_PRIVATE);
loginPreferences.edit().clear().commit();
}
}
if(isUserValidated && isPasswordValidated)
{
Intent intent = new Intent(Login.this,HomePage.class);
intent.putExtra("username",userName.getText().toString());
startActivity(intent);
}
else
{
\\ what ever you want to do if the data in the EditText is not validated.
\\ Maybe restart the same intent ?
\\ Intent i = new Intent(getApplicationContext(), Login.class); startActivity(i);
}
}
}
else
{
Intent i = new Intent(getApplicationContext(), Login.class);
startActivity(i);
}
}
catch(Exception e){
}
}
}