Hide software keyboard if EditText is not empty

Question

I'm trying to hide the software keyboard when the login activity is loaded with the EditText already filled with the sharedPreferences data.

I've tried this code found in other questions, but it doesn't work:

if(inputEmail.getText().toString().trim() != null){
    InputMethodManager inputManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE); 
    inputManager.hideSoftInputFromWindow(inputEmail.getWindowToken(),0);
}

Can you give me suggestions to resolve this problem?

EDIT: this is my XML layout:

<LinearLayout
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    android:padding="10dip" >

    <LinearLayout
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="horizontal" >

        <!--  View Title Label -->
        <TextView
            android:layout_width="0dp"
            android:layout_weight="2"
            android:layout_height="wrap_content"
            android:layout_marginBottom="10dip"
            android:text="LOGIN"
            android:textSize="25dip"
            android:textStyle="bold"
            android:textColor="#FFF" />

        <Button
            android:id="@+id/btnLinkToRegisterScreen"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1.37"
            android:background="#900099CC"
            android:text="Registrazione"
            android:textColor="#FFF"
            android:textStyle="bold" />

    </LinearLayout>

    <!--  Email Label -->
    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Email o username" 
        android:textColor="#FFF" />

    <View 
        android:layout_width="fill_parent"
        android:layout_height="1dp"       
        android:background="#FFF" />

    <!--  Email TextField -->
    <EditText
        android:id="@+id/loginEmail"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:inputType="text"
        android:windowSoftInputMode="stateHidden"
        android:imeOptions="actionNext"
        android:background="#97FFFFFF"
        android:padding="5dp"
        android:layout_marginTop="5dp"/>

    <!--  Password Label -->
    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dip"
        android:text="Password" 
        android:textColor="#FFF"/>

    <View 
        android:layout_width="fill_parent"
        android:layout_height="1dp"       
        android:background="#FFF" />

    <!--  Password TextField -->
    <EditText
        android:id="@+id/loginPassword"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:inputType="textPassword"
        android:background="#97FFFFFF"
        android:padding="5dp"
        android:layout_marginTop="5dp"  />

    <CheckBox
        android:id="@+id/chkPref"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textColor="#FFFFFF"
        android:background="#80FFFFFF"
        android:text="Salva dati di accesso"
        android:checked="true"
        android:padding="5dp" 
        android:layout_marginTop="15dp"/>

    <!--  Login Button -->
    <Button
        android:id="@+id/btnLogin"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dip"
        android:text="Login"
        android:textColor="#FFF"
        android:background="#97000066" />

    </LinearLayout>

</ScrollView>

I use the InputMethodManager only in this case when I try to hide the keyboard, please help!

Thank you

EDIT-2: Activity code:

public class Login extends Activity 
{
String nomeGiocatore;
Intent intentRegistrazione;
JsonDB jParser = new JsonDB();
Button btnLogin;
Button btnLinkToRegister;
public static EditText inputEmail;
public static EditText inputPassword;
private CheckBox chkPref;

Editor editor;


@Override
public void onCreate(Bundle savedInstanceState) 
{    
    super.onCreate(savedInstanceState);
    setContentView(R.layout.login);

    // Elementi della UI
    inputEmail = (EditText) findViewById(R.id.loginEmail);
    inputPassword = (EditText) findViewById(R.id.loginPassword);
    btnLogin = (Button) findViewById(R.id.btnLogin);
    btnLinkToRegister = (Button) findViewById(R.id.btnLinkToRegisterScreen);
    chkPref = (CheckBox) findViewById(R.id.chkPref);

    chkPref.setTextColor(Color.WHITE);

    // utilizzo le sharedpreferences per salvare i dati del login e recuperarli alla successiva apertura dell'app
    SharedPreferences pref = getApplicationContext().getSharedPreferences("MyPref", 0); // 0 -  private mode
    editor = pref.edit();



    // la tastiera viene nascosta se il campo è già compilato con i dati salvati nelle shared preferences
    if(inputEmail.getText().toString().trim() != "")
    {

        Log.d("KYBRD", "Valor: " + inputEmail.getText().toString().trim());

        InputMethodManager inputManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE); 
        inputManager.hideSoftInputFromWindow(inputPassword.getWindowToken(),0);
    }



    inputPassword.setText(pref.getString("password", ""));

    // Salvo il nome del giocatore preso dall'intent registrazione (se si è passati per tale schermata)
    intentRegistrazione = getIntent();
    String username = intentRegistrazione.getStringExtra("nomeGiocatore");

    if(username != null)
    {
        inputEmail.setText(username);
        inputPassword.setText("");

        editor.clear();
        editor.commit();
    }
    else
        inputEmail.setText(pref.getString("name", ""));

    // Override del bottone, in modo che funzioni da "tasto Invio"
    inputPassword.setOnEditorActionListener(new TextView.OnEditorActionListener() 
    {   
        @Override
        public boolean onEditorAction(TextView v, int actionId, KeyEvent event)
        {
            if (actionId == EditorInfo.IME_ACTION_SEARCH || actionId == EditorInfo.IME_ACTION_DONE || 
                    event.getAction() == KeyEvent.ACTION_DOWN &&
                    event.getKeyCode() == KeyEvent.KEYCODE_ENTER) 
            {
                new CheckUser(Login.this,inputEmail.getText().toString().trim(),inputPassword.getText().toString().trim()).execute();
            }

            if (chkPref.isChecked())
            {
                editor.putString("name", inputEmail.getText().toString().trim());
                editor.putString("password", inputPassword.getText().toString().trim());

                editor.commit();
            }
            else
            {
                editor.clear();
                editor.commit();
            }

            return true;
        }
    });

    inputPassword.setImeActionLabel("Invia", KeyEvent.KEYCODE_ENTER);

    // Override del metodo onClick per controllare la presenza della connessione, 
    btnLogin.setOnClickListener(new View.OnClickListener() 
    {   
        @Override
        public void onClick(View v) 
        {   
            // controllo se esiste una connessione

            ConnectivityManager manager = (ConnectivityManager)getSystemService(Login.CONNECTIVITY_SERVICE);
            Boolean isWifiConnected = manager.getNetworkInfo(ConnectivityManager.TYPE_WIFI).isConnectedOrConnecting();
            Boolean isMobileConnected = manager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).isConnectedOrConnecting();

            if(!isWifiConnected && !isMobileConnected)
            {
                new AlertDialog.Builder(Login.this)
                .setTitle("Connessione non attiva!")
                .setMessage("Per giocare a ProjectM è necessaria la connessione alla rete. Vuoi andare alla pagina delle impostazioni?")
                .setNegativeButton("Attiva Wifi", new DialogInterface.OnClickListener() 
                {
                    @Override
                    public void onClick(DialogInterface dialog, int which) 
                    {
                        startActivity(new Intent(Settings.ACTION_WIFI_SETTINGS));
                        dialog.dismiss();
                    }
                })
                .setPositiveButton(android.R.string.no, new DialogInterface.OnClickListener() 
                {
                    @Override
                    public void onClick(DialogInterface dialog, int which) 
                    {
                        dialog.dismiss();
                        finish();
                    }
                })
                .setNeutralButton("Attiva rete mobile", new DialogInterface.OnClickListener() 
                {
                    @Override
                    public void onClick(DialogInterface dialog, int which) 
                    {
                        startActivity(new Intent(Settings.ACTION_WIRELESS_SETTINGS));
                        dialog.dismiss();
                    }
                }).create().show();
            }
            else
            {
                // Verifico correttezza dati login
                new CheckUser(Login.this,inputEmail.getText().toString().trim(),inputPassword.getText().toString().trim()).execute();

                if (chkPref.isChecked())
                {
                    editor.putString("name", inputEmail.getText().toString().trim());
                    editor.putString("password", inputPassword.getText().toString().trim());

                    editor.commit();
                }
                else
                {
                    editor.clear();
                    editor.commit();
                }
            }
        }
    });

    // Override del metodo onClick che porta alla schermata di registrazione
    btnLinkToRegister.setOnClickListener(new View.OnClickListener() 
    { 
        @Override
        public void onClick(View view) 
        {
            Intent intentToRegistration = new Intent(getApplicationContext(),Register.class);
            startActivity(intentToRegistration);
            finish();
        }
    }); 
}
}

Here is the code, hope it helps you!

Answer 1

You should replace your hide keyboard code with this line:

this.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);

It will help now.

Cheers

Answer 2

for hiding soft keyboard try to use :

/**
     * Hides Soft Keyboard displayed by currently focused EditText
     * 
     * @param pEditText EditText currenly focused EditText
     */
    protected void hideSoftKeyboard( EditText pEditText )
    {
        InputMethodManager lInputMethodManager = (InputMethodManager) pEditText.getContext().getSystemService( Context.INPUT_METHOD_SERVICE );
        lInputMethodManager.hideSoftInputFromWindow( pEditText.getWindowToken() , 0 );
    }

Answer 3

Check if result of trim() is an empty string, not null

Answer 4

use android:windowSoftInputMode="stateHidden" to hide keyboard