Co powinienem umieścić na imeActionId?

Question

Chcę utworzyć aplikację przy użyciu Aktywności logowania na Android Studio. Powiedział, że @ + id/login w atrybucie imeActionId nie jest prawidłową liczbą całkowitą. Co się stało? Nic nie zmieniłem. Domyślnie jest to "android: imeActionId =" @ + id/login "". http://i.stack.imgur.com/ow5b8.png

Mój kod źródłowy.

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="android.com.login" > 

    <!-- To auto-complete the email text field in the login form with the user's emails --> 
    <uses-permission android:name="android.permission.GET_ACCOUNTS" /> 
    <uses-permission android:name="android.permission.READ_PROFILE" /> 
    <uses-permission android:name="android.permission.READ_CONTACTS" /> 

    <application 
     android:allowBackup="true" 
     android:icon="@mipmap/ic_launcher" 
     android:label="@string/app_name" 
     android:theme="@style/AppTheme" > 
     <activity 
      android:name=".LoginActivity" 
      android:label="@string/app_name" 
      android:windowSoftInputMode="adjustResize|stateVisible" > 
     </activity> 
    </application> 

</manifest> 

LoginActivity

package android.com.login; 

import android.animation.Animator; 
import android.animation.AnimatorListenerAdapter; 
import android.annotation.TargetApi; 
import android.app.Activity; 
import android.app.LoaderManager.LoaderCallbacks; 
import android.content.ContentResolver; 
import android.content.CursorLoader; 
import android.content.Loader; 
import android.database.Cursor; 
import android.net.Uri; 
import android.os.AsyncTask; 

import android.os.Build; 
import android.os.Bundle; 
import android.provider.ContactsContract; 
import android.text.TextUtils; 
import android.view.KeyEvent; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.view.inputmethod.EditorInfo; 
import android.widget.ArrayAdapter; 
import android.widget.AutoCompleteTextView; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.TextView; 

import java.util.ArrayList; 
import java.util.List; 


/** 
* A login screen that offers login via email/password. 
*/ 
public class LoginActivity extends Activity implements LoaderCallbacks<Cursor> { 

    /** 
    * A dummy authentication store containing known user names and passwords. 
    * TODO: remove after connecting to a real authentication system. 
    */ 
    private static final String[] DUMMY_CREDENTIALS = new String[]{ 
      "foo@example.com:hello", "bar@example.com:world" 
    }; 
    /** 
    * Keep track of the login task to ensure we can cancel it if requested. 
    */ 
    private UserLoginTask mAuthTask = null; 

    // UI references. 
    private AutoCompleteTextView mEmailView; 
    private EditText mPasswordView; 
    private View mProgressView; 
    private View mLoginFormView; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_login); 

     // Set up the login form. 
     mEmailView = (AutoCompleteTextView) findViewById(R.id.email); 
     populateAutoComplete(); 

     mPasswordView = (EditText) findViewById(R.id.password); 
     mPasswordView.setOnEditorActionListener(new TextView.OnEditorActionListener() { 
      @Override 
      public boolean onEditorAction(TextView textView, int id, KeyEvent keyEvent) { 
       if (id == R.id.login || id == EditorInfo.IME_NULL) { 
        attemptLogin(); 
        return true; 
       } 
       return false; 
      } 
     }); 

     Button mEmailSignInButton = (Button) findViewById(R.id.email_sign_in_button); 
     mEmailSignInButton.setOnClickListener(new OnClickListener() { 
      @Override 
      public void onClick(View view) { 
       attemptLogin(); 
      } 
     }); 

     mLoginFormView = findViewById(R.id.login_form); 
     mProgressView = findViewById(R.id.login_progress); 
    } 

    private void populateAutoComplete() { 
     getLoaderManager().initLoader(0, null, this); 
    } 


    /** 
    * Attempts to sign in or register the account specified by the login form. 
    * If there are form errors (invalid email, missing fields, etc.), the 
    * errors are presented and no actual login attempt is made. 
    */ 
    public void attemptLogin() { 
     if (mAuthTask != null) { 
      return; 
     } 

     // Reset errors. 
     mEmailView.setError(null); 
     mPasswordView.setError(null); 

     // Store values at the time of the login attempt. 
     String email = mEmailView.getText().toString(); 
     String password = mPasswordView.getText().toString(); 

     boolean cancel = false; 
     View focusView = null; 


     // Check for a valid password, if the user entered one. 
     if (!TextUtils.isEmpty(password) && !isPasswordValid(password)) { 
      mPasswordView.setError(getString(R.string.error_invalid_password)); 
      focusView = mPasswordView; 
      cancel = true; 
     } 

     // Check for a valid email address. 
     if (TextUtils.isEmpty(email)) { 
      mEmailView.setError(getString(R.string.error_field_required)); 
      focusView = mEmailView; 
      cancel = true; 
     } else if (!isEmailValid(email)) { 
      mEmailView.setError(getString(R.string.error_invalid_email)); 
      focusView = mEmailView; 
      cancel = true; 
     } 

     if (cancel) { 
      // There was an error; don't attempt login and focus the first 
      // form field with an error. 
      focusView.requestFocus(); 
     } else { 
      // Show a progress spinner, and kick off a background task to 
      // perform the user login attempt. 
      showProgress(true); 
      mAuthTask = new UserLoginTask(email, password); 
      mAuthTask.execute((Void) null); 
     } 
    } 

    private boolean isEmailValid(String email) { 
     //TODO: Replace this with your own logic 
     return email.contains("@"); 
    } 

    private boolean isPasswordValid(String password) { 
     //TODO: Replace this with your own logic 
     return password.length() > 4; 
    } 

    /** 
    * Shows the progress UI and hides the login form. 
    */ 
    @TargetApi(Build.VERSION_CODES.HONEYCOMB_MR2) 
    public void showProgress(final boolean show) { 
     // On Honeycomb MR2 we have the ViewPropertyAnimator APIs, which allow 
     // for very easy animations. If available, use these APIs to fade-in 
     // the progress spinner. 
     if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR2) { 
      int shortAnimTime = getResources().getInteger(android.R.integer.config_shortAnimTime); 

      mLoginFormView.setVisibility(show ? View.GONE : View.VISIBLE); 
      mLoginFormView.animate().setDuration(shortAnimTime).alpha(
        show ? 0 : 1).setListener(new AnimatorListenerAdapter() { 
       @Override 
       public void onAnimationEnd(Animator animation) { 
        mLoginFormView.setVisibility(show ? View.GONE : View.VISIBLE); 
       } 
      }); 

      mProgressView.setVisibility(show ? View.VISIBLE : View.GONE); 
      mProgressView.animate().setDuration(shortAnimTime).alpha(
        show ? 1 : 0).setListener(new AnimatorListenerAdapter() { 
       @Override 
       public void onAnimationEnd(Animator animation) { 
        mProgressView.setVisibility(show ? View.VISIBLE : View.GONE); 
       } 
      }); 
     } else { 
      // The ViewPropertyAnimator APIs are not available, so simply show 
      // and hide the relevant UI components. 
      mProgressView.setVisibility(show ? View.VISIBLE : View.GONE); 
      mLoginFormView.setVisibility(show ? View.GONE : View.VISIBLE); 
     } 
    } 

    @Override 
    public Loader<Cursor> onCreateLoader(int i, Bundle bundle) { 
     return new CursorLoader(this, 
       // Retrieve data rows for the device user's 'profile' contact. 
       Uri.withAppendedPath(ContactsContract.Profile.CONTENT_URI, 
         ContactsContract.Contacts.Data.CONTENT_DIRECTORY), ProfileQuery.PROJECTION, 

       // Select only email addresses. 
       ContactsContract.Contacts.Data.MIMETYPE + 
         " = ?", new String[]{ContactsContract.CommonDataKinds.Email 
       .CONTENT_ITEM_TYPE}, 

       // Show primary email addresses first. Note that there won't be 
       // a primary email address if the user hasn't specified one. 
       ContactsContract.Contacts.Data.IS_PRIMARY + " DESC"); 
    } 

    @Override 
    public void onLoadFinished(Loader<Cursor> cursorLoader, Cursor cursor) { 
     List<String> emails = new ArrayList<String>(); 
     cursor.moveToFirst(); 
     while (!cursor.isAfterLast()) { 
      emails.add(cursor.getString(ProfileQuery.ADDRESS)); 
      cursor.moveToNext(); 
     } 

     addEmailsToAutoComplete(emails); 
    } 

    @Override 
    public void onLoaderReset(Loader<Cursor> cursorLoader) { 

    } 

    private interface ProfileQuery { 
     String[] PROJECTION = { 
       ContactsContract.CommonDataKinds.Email.ADDRESS, 
       ContactsContract.CommonDataKinds.Email.IS_PRIMARY, 
     }; 

     int ADDRESS = 0; 
     int IS_PRIMARY = 1; 
    } 


    private void addEmailsToAutoComplete(List<String> emailAddressCollection) { 
     //Create adapter to tell the AutoCompleteTextView what to show in its dropdown list. 
     ArrayAdapter<String> adapter = 
       new ArrayAdapter<String>(LoginActivity.this, 
         android.R.layout.simple_dropdown_item_1line, emailAddressCollection); 

     mEmailView.setAdapter(adapter); 
    } 

    /** 
    * Represents an asynchronous login/registration task used to authenticate 
    * the user. 
    */ 
    public class UserLoginTask extends AsyncTask<Void, Void, Boolean> { 

     private final String mEmail; 
     private final String mPassword; 

     UserLoginTask(String email, String password) { 
      mEmail = email; 
      mPassword = password; 
     } 

     @Override 
     protected Boolean doInBackground(Void... params) { 
      // TODO: attempt authentication against a network service. 

      try { 
       // Simulate network access. 
       Thread.sleep(2000); 
      } catch (InterruptedException e) { 
       return false; 
      } 

      for (String credential : DUMMY_CREDENTIALS) { 
       String[] pieces = credential.split(":"); 
       if (pieces[0].equals(mEmail)) { 
        // Account exists, return true if the password matches. 
        return pieces[1].equals(mPassword); 
       } 
      } 

      // TODO: register the new account here. 
      return true; 
     } 

     @Override 
     protected void onPostExecute(final Boolean success) { 
      mAuthTask = null; 
      showProgress(false); 

      if (success) { 
       finish(); 
      } else { 
       mPasswordView.setError(getString(R.string.error_incorrect_password)); 
       mPasswordView.requestFocus(); 
      } 
     } 

     @Override 
     protected void onCancelled() { 
      mAuthTask = null; 
      showProgress(false); 
     } 
    } 
} 

activity_login.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" 
    android:layout_height="match_parent" android:gravity="center_horizontal" 
    android:orientation="vertical" android:paddingBottom="@dimen/activity_vertical_margin" 
    android:paddingLeft="@dimen/activity_horizontal_margin" 
    android:paddingRight="@dimen/activity_horizontal_margin" 
    android:paddingTop="@dimen/activity_vertical_margin" tools:context=".LoginActivity"> 

    <!-- Login progress --> 
    <ProgressBar android:id="@+id/login_progress" style="?android:attr/progressBarStyleLarge" 
     android:layout_width="wrap_content" android:layout_height="wrap_content" 
     android:layout_marginBottom="8dp" android:visibility="gone" /> 

    <ScrollView android:id="@+id/login_form" android:layout_width="match_parent" 
     android:layout_height="match_parent"> 

     <LinearLayout android:id="@+id/email_login_form" android:layout_width="match_parent" 
      android:layout_height="wrap_content" android:orientation="vertical"> 

      <AutoCompleteTextView android:id="@+id/email" android:layout_width="match_parent" 
       android:layout_height="wrap_content" android:hint="@string/prompt_email" 
       android:inputType="textEmailAddress" android:maxLines="1" 
       android:singleLine="true" /> 

      <EditText android:id="@+id/password" android:layout_width="match_parent" 
       android:layout_height="wrap_content" android:hint="@string/prompt_password" 
       android:imeActionId="@+id/login" 
       android:imeActionLabel="@string/action_sign_in_short" 
       android:imeOptions="actionUnspecified" android:inputType="textPassword" 
       android:maxLines="1" android:singleLine="true" /> 

      <Button android:id="@+id/email_sign_in_button" style="?android:textAppearanceSmall" 
       android:layout_width="match_parent" android:layout_height="wrap_content" 
       android:layout_marginTop="16dp" android:text="@string/action_sign_in" 
       android:textStyle="bold" /> 

     </LinearLayout> 
    </ScrollView> 

</LinearLayout> 

Wynik: http://i.stack.imgur.com/C49NT.png

Answer 1

LoginActivity wymaga wersji minSDK 9. Sprawdź swoją wersję minSDK w pliku AndroidManifest. Sprawdź to samo w pliku gradle.build.