我需要在共享首选项中存储用户登录名和密码详细信息，但我收到错误。我需要在会话中维护用户登录详细信息。当用户登录用户邮件和密码时，应该存储在编辑文本中。从下次用户可以点击登录按钮直接进入。我现在需要做什么。这是我的代码。当我尝试下面的代码时，我很遗憾地收到错误。我需要修改代码的地方。这段代码有什么问题。
public class MainActivity extends Activity {
Button b;
EditText email,password;
HttpPost httppost;
StringBuffer buffer;
SharedPreferences sharedpreferences;
public static final String MyPREFERENCES = "MyPrefs" ;
public static final String Name = "nameKey";
public static final String Phone = "phoneKey";
String email1,passw;
SharedPreferences sh_Pref;
Editor toEdit;
HttpResponse response;
HttpClient httpclient;
List<NameValuePair> nameValuePairs;
ProgressDialog dialog = null;
DBHelper db = new DBHelper(this);
private boolean isValidEmaillId(String email){
return Pattern.compile("^(([\\w-]+\\.)+[\\w-]+|([a-zA-Z]{1}|[\\w-]{2,}))@"
+ "((([0-1]?[0-9]{1,2}|25[0-5]|2[0-4][0-9])\\.([0-1]?"
+ "[0-9]{1,2}|25[0-5]|2[0-4][0-9])\\."
+ "([0-1]?[0-9]{1,2}|25[0-5]|2[0-4][0-9])\\.([0-1]?"
+ "[0-9]{1,2}|25[0-5]|2[0-4][0-9])){1}|"
+ "([a-zA-Z]+[\\w-]+\\.)+[a-zA-Z]{2,4})$").matcher(email).matches();
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
b = (Button)findViewById(R.id.Button01);
email = (EditText)findViewById(R.id.username);
password= (EditText)findViewById(R.id.password);
sharedpreferences = getSharedPreferences(MyPREFERENCES, Context.MODE_PRIVATE);
b.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if(!isValidEmaillId(email.getText().toString().trim())){
Toast.makeText(getApplicationContext(), "Invalid Email Address", Toast.LENGTH_SHORT).show();
}
else if(password.getText().toString().equals(""))
{
Toast.makeText(getApplicationContext(), "Please enter password", Toast.LENGTH_SHORT).show();
}
else
{
email1 = email.getText().toString().trim();
passw = password.getText().toString().trim();
SharedPreferences.Editor editor = sharedpreferences.edit();
editor.putString(Name, email1);
editor.putString(Phone, passw);
editor.commit();
System.out.println("sharde :" +Name+Phone);
dialog = ProgressDialog.show(MainActivity.this, "",
"Validating user...", true);
new Thread(new Runnable() {
public void run() {
login();
}
}).start();
}
}
});
}
void login(){
try{
final User user = new User();
httpclient=new DefaultHttpClient();
httppost= new HttpPost("http://ip:8080/ActCFWeb/login"); // make sure the url is correct.
//add your data
nameValuePairs = new ArrayList<NameValuePair>(2);
// Always use the same variable name for posting i.e the android side variable name and php side variable name should be similar,
nameValuePairs.add(new BasicNameValuePair("email",email1)); // $Edittext_value = $_POST['Edittext_value'];
nameValuePairs.add(new BasicNameValuePair("pass",passw));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
//Execute HTTP Post Request
System.out.println(response);
ResponseHandler<String> responseHandler = new BasicResponseHandler();
final String response = httpclient.execute(httppost, responseHandler);
System.out.println("Response : " + response);
runOnUiThread(new Runnable() {
public void run() {
dialog.dismiss();
}
});
if(response.contains("success")){
runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(MainActivity.this,"Login Success", Toast.LENGTH_SHORT).show();
}
});
Intent nextScreen = new Intent(getApplicationContext(), FeedBack.class);
//Sending data to another Activity
nextScreen.putExtra("email", email.getText().toString());
Log.e("n", email.getText()+"."+ email.getText());
startActivity(nextScreen);
}else{
showAlert();
}
}catch(Exception e){
dialog.dismiss();
System.out.println("Exception : " + e.getMessage());
}
}
public void showAlert(){
MainActivity.this.runOnUiThread(new Runnable() {
public void run() {
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setTitle("Login Error.");
builder.setMessage("User not Found.")
.setCancelable(false)
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
}
});
AlertDialog alert = builder.create();
alert.show();
}
});
}
public boolean isOnline() {
ConnectivityManager conMgr = (ConnectivityManager) getApplicationContext().getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo netInfo = conMgr.getActiveNetworkInfo();
if(netInfo == null || !netInfo.isConnected() || !netInfo.isAvailable()){
Toast.makeText(getApplicationContext(), "No Internet connection!", Toast.LENGTH_LONG).show();
return false;
}
return true;
}
}
答案 0 :(得分：0)
我想你从线程调用了views方法。您有女性登录方法，可能会调用dialog或其他视图。您无法从非主要线程访问ui元素。您必须使用处理程序或 asynck任务。
答案 1 :(得分：0)
可能你在谈论这个
SharedPreferences.Editor editor = sharedpreferences.edit（）;
editor.putString(Name, email1);
editor.putString(Phone, passw);
editor.commit();
System.out.println("sharde :" +sharedpreferences.getString(Name, "def").toString()+ ", "sharedpreferences.getString(Phone, "def");
答案 2 :(得分：0)
从SharedPreferences存储中获取值。
SharedPreferences sharedpreferences = getSharedPreferences(MyPREFERENCES, Context.MODE_PRIVATE);
String emailString = sharedPreferences.getString("email", null);
String passwordString = sharedPreferences.getString("password", null);
在onCreate方法中，首先检查首选项是否包含电子邮件和密码的值。
if((emailString != null) && (passwordString != null)) {
//Populate the email and password edit texts using stored email and password values.
etEmail.setText(emailString);
etPassword.setText(passwordString);
}
应在主（UI）线程中执行启动活动。您可以使用Handler或runOnUiThread。
if(response.contains("success")){
runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(MainActivity.this,"Login Success", Toast.LENGTH_SHORT).show();
Intent nextScreen = new Intent(getApplicationContext(), FeedBack.class);
//Sending data to another Activity
nextScreen.putExtra("email", email.getText().toString());
Log.e("n", email.getText()+"."+ email.getText());
startActivity(nextScreen);
}
});
}else{
showAlert();
}