我需要从edittext转换为button。当我在edittext中写密码时，出现“ zaloguj”-> https://zapodaj.net/1166d338c3812.png.html，但是当我单击它时，应用程序将关闭。当我单击按钮或“选项卡”，然后下一个“输入”时，则可以正常工作。但是我需要系统键盘支持
import static android.Manifest.permission.READ_CONTACTS;
/**
* A login screen that offers login via NIU/password.
*/
public class LoginActivity extends AppCompatActivity implements LoaderCallbacks<Cursor> {
/**
* Id to identity READ_CONTACTS permission request.
*/
private static final int REQUEST_READ_CONTACTS = 0;
/**
* 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[]{
"95254:hello"
};
/**
* Keep track of the login task to ensure we can cancel it if requested.
*/
private UserLoginTask mAuthTask = null;
// UI references.
private AutoCompleteTextView mNIUView;
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.
mNIUView = (AutoCompleteTextView) findViewById(R.id.NIU);
populateAutoComplete();
mPasswordView = (EditText) findViewById(R.id.password);
mPasswordView.setOnEditorActionListener(new TextView.OnEditorActionListener() {
@Override
public boolean onEditorAction(TextView textView, int id, KeyEvent keyEvent) {
if (id == EditorInfo.IME_ACTION_DONE || id == EditorInfo.IME_NULL ) {
attemptLogin();
return true;
}
return false;
}
});
final Button mNIUSignInButton = (Button) findViewById(R.id.NIU_sign_in_button);
mNIUSignInButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
attemptLogin();
if (checkLog()) {
Intent intent = new Intent(LoginActivity.this, MenuActivity.class);
startActivity(intent);
}else if(checkNIU()){
mPasswordView.setText("");
}else{
mNIUView.setText("");
mPasswordView.setText("");
}
}
});
mLoginFormView = findViewById(R.id.login_form);
mProgressView = findViewById(R.id.login_progress);
}
private void populateAutoComplete() {
if (!mayRequestContacts()) {
return;
}
getLoaderManager().initLoader(0, null, this);
}
private boolean mayRequestContacts() {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
return true;
}
if (checkSelfPermission(READ_CONTACTS) == PackageManager.PERMISSION_GRANTED) {
return true;
}
if (shouldShowRequestPermissionRationale(READ_CONTACTS)) {
Snackbar.make(mNIUView, R.string.permission_rationale, Snackbar.LENGTH_INDEFINITE)
.setAction(android.R.string.ok, new View.OnClickListener() {
@Override
@TargetApi(Build.VERSION_CODES.M)
public void onClick(View v) {
requestPermissions(new String[]{READ_CONTACTS}, REQUEST_READ_CONTACTS);
}
});
} else {
requestPermissions(new String[]{READ_CONTACTS}, REQUEST_READ_CONTACTS);
}
return false;
}
/**
* Callback received when a permissions request has been completed.
*/
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,
@NonNull int[] grantResults) {
if (requestCode == REQUEST_READ_CONTACTS) {
if (grantResults.length == 1 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
populateAutoComplete();
}
}
}
/**
* Attempts to sign in or register the account specified by the login form.
* If there are form errors (invalid NIU, missing fields, etc.), the
* errors are presented and no actual login attempt is made.
*/
private void attemptLogin() {
if (mAuthTask != null) {
return;
}
// Reset errors.
mNIUView.setError(null);
mPasswordView.setError(null);
// Store values at the time of the login attempt.
String NIU = mNIUView.getText().toString();
String password = mPasswordView.getText().toString();
boolean cancel = false;
View focusView = null;
if(!exist()){
mNIUView.setError(getString(R.string.error_invalid_all));
mPasswordView.setError(getString(R.string.error_invalid_all));
focusView = mNIUView;
cancel = true;
}
// Check for a valid NIU
if (TextUtils.isEmpty(NIU)) {
mNIUView.setError(getString(R.string.error_field_required));
focusView = mNIUView;
cancel = true;
} else if(!isNIUValid(NIU)){
mNIUView.setError(getString(R.string.error_invalid_NIU));
focusView = mNIUView;
cancel = true;
} else if (!checkNIU() && checkPassword()) {
mNIUView.setError(getString(R.string.error_invalid_one));
mPasswordView.setError(getString(R.string.error_invalid_one));
focusView = mNIUView;
cancel = true;
}
if(TextUtils.isEmpty(password)){
mPasswordView.setError(getString(R.string.error_field_required));
focusView = mPasswordView;
cancel = true;
}else if(!checkPassword() && checkNIU()){
mNIUView.setError(getString(R.string.error_invalid_one));
mPasswordView.setError(getString(R.string.error_invalid_one));
focusView = mPasswordView;
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(NIU, password);
mAuthTask.execute((Void) null);
}
mAuthTask = null;
}
private boolean isNIUValid(String NIU) {
try {
double d = Double.parseDouble(NIU);
}catch(NumberFormatException nfe){
return false;
}
return true;
}
private boolean exist(){
if(checkLog()) {
return true;
}
return false;
}
/**
* Shows the progress UI and hides the login form.
*/
@TargetApi(Build.VERSION_CODES.HONEYCOMB_MR2)
private 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> NIUs = new ArrayList<>();
cursor.moveToFirst();
while (!cursor.isAfterLast()) {
NIUs.add(cursor.getString(ProfileQuery.ADDRESS));
cursor.moveToNext();
}
addEmailsToAutoComplete(NIUs);
}
@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> NIUAddressCollection) {
//Create adapter to tell the AutoCompleteTextView what to show in its dropdown list.
ArrayAdapter<String> adapter =
new ArrayAdapter<>(LoginActivity.this,
android.R.layout.simple_dropdown_item_1line, NIUAddressCollection);
mNIUView.setAdapter(adapter);
}
private boolean checkLog(){
String email = mNIUView.getText().toString();
String password = mPasswordView.getText().toString();
for (String credential : DUMMY_CREDENTIALS) {
String[] pieces = credential.split(":");
if (pieces[0].equals(email)) {
// Account exists, return true if the password matches.
return pieces[1].equals(password);
}
}
return false;
}
private boolean checkNIU(){
String email = mNIUView.getText().toString();
for (String credential : DUMMY_CREDENTIALS) {
String[] pieces = credential.split(":");
if (pieces[0].equals(email))
return true;
}
return false;
}
private boolean checkPassword(){
String password = mPasswordView.getText().toString();
for (String credential : DUMMY_CREDENTIALS) {
String[] pieces = credential.split(":");
if (pieces[1].equals(password))
return true;
}
return false;
}
/**
* Represents an asynchronous login/registration task used to authenticate
* the user.
*/
public class UserLoginTask extends AsyncTask<Void, Void, Boolean> {
private final String mNIU;
private final String mPassword;
UserLoginTask(String NIU, String password) {
mNIU = NIU;
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(mNIU)) {
// 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_invalid_one));
mPasswordView.requestFocus();
}
}
@Override
protected void onCancelled() {
mAuthTask = null;
showProgress(false);
}
}
}
和我的.xml->
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
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"/>
<ImageView
android:id="@+id/imageView"
android:layout_width="257dp"
android:layout_height="127dp"
app:srcCompat="@drawable/pk" />
<TextView
android:id="@+id/textView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/name_pk"
android:textSize="30dp"
android:gravity="center_horizontal"
android:textColor="@color/colorPrimaryDark"/>
<TextView
android:id="@+id/textView2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/name_of_pk"
android:textSize="15dp"
android:gravity="center_horizontal"
android:textColor="@color/colorPrimaryDark"
/>
<ScrollView
android:id="@+id/login_form"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="@+id/NIU_login_form"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<android.support.design.widget.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<AutoCompleteTextView
android:id="@+id/NIU"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="@string/prompt_NIU"
android:inputType="textEmailAddress"
android:imeOptions="actionNext"
android:maxLines="1"
android:singleLine="true" />
</android.support.design.widget.TextInputLayout>
<android.support.design.widget.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<EditText
android:id="@+id/password"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="@string/prompt_password"
android:imeActionId="6"
android:imeActionLabel="@string/action_sign_in"
android:inputType="textPassword"
android:maxLines="1"
android:singleLine="true"
/>
</android.support.design.widget.TextInputLayout>
<Button
android:id="@+id/NIU_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:textSize="25dp"
android:textStyle="bold"
android:background="@color/colorPrimaryDark"
android:textColor="@color/white"/>
</LinearLayout>
</ScrollView>
</LinearLayout>