在设置屏幕上隐藏密码

Question

我有轻松的问题，但我找不到解决方案。让我们通过Android工作室生成设置页面。这是一个字段 - 密码。

<EditTextPreference
    android:defaultValue="@string/pref_default_display_password"
    android:inputType="textPassword"
    android:key="password"
    android:maxLines="1"
    android:selectAllOnFocus="true"
    android:singleLine="true"
    android:password="true"
    android:title="@string/pref_title_display_password" />

带星号的输入没有问题。但问题是，我在屏幕上看到保存的密码：

我该如何隐藏它？

非常感谢。

Answer 1

我使用OnPreferenceChangeListener解决了这个问题，它在显示首选项之前和更改时调用。我借此机会在摘要中设置密码的修改版本，方法是将文本转换为带星号的字符串

Preference.OnPreferenceChangeListener sBindPreferenceSummaryToValueListener = new Preference.OnPreferenceChangeListener() {
    @Override
    public boolean onPreferenceChange(Preference preference, Object value) {
        String stringValue = value.toString();
        ...
        if (preference instanceof EditTextPreference){
            // For the pin code, set a *** value in the summary to hide it
            if (preference.getContext().getString(R.string.pref_pin_code_key).equals(preference.getKey())) {
                stringValue = toStars(stringValue);
            }
            preference.setSummary(stringValue);
        }
        ...
        return true;
    }
};

String toStars(String text) {
    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < text.length(); i++) {
        sb.append('*');
    }
    text = sb.toString();
    return text;

}

Answer 2

谢谢大家，目前我使用了＆＃34; hotfix＆＃34;，它隐藏了密码值。我会在将来尝试更换它。修补程序是，我只是删除密码显示：

bindPreferenceSummaryToValue(findPreference("username"));
//bindPreferenceSummaryToValue(findPreference("password"));
bindPreferenceSummaryToValue(findPreference("ip"));
bindPreferenceSummaryToValue(findPreference("port"));

Answer 3

使用此

<EditTextPreference
    android:inputType="textPassword"
    android:key="@string/key"
    android:summary="@string/summary"
    android:title="@string/title" />

你想要的

android：inputType

感谢

Answer 4

public class PasswordPreference扩展DialogPreference

{

private String password;
private EditText passwordEditText;
private EditText confirmEditText;

public PasswordPreference(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);

    init(context, attrs);
}

public PasswordPreference(Context context, AttributeSet attrs) {
    super(context, attrs);

    init(context, attrs);
}

private void init(Context context, AttributeSet attrs) {
    setDialogLayoutResource(R.layout.confirm_password);

    passwordEditText = new EditText(context, attrs);
    confirmEditText = new EditText(context, attrs);

}

private void detachView(View view, View newParent) {
    ViewParent oldParent = view.getParent();
    if (oldParent != newParent && oldParent != null)
        ((ViewGroup) oldParent).removeView(view);
}

@Override
public void onBindDialogView(View view) {
    detachView(passwordEditText, view);
    detachView(confirmEditText, view);

    LinearLayout layout = (LinearLayout) view.findViewById(R.id.linearLayout);
    layout.addView(passwordEditText);
    layout.addView(confirmEditText);

    passwordEditText.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence charSequence, int i, int i2, int i3) {

        }

        @Override
        public void onTextChanged(CharSequence charSequence, int i, int i2, int i3) {

        }

        @Override
        public void afterTextChanged(Editable editable) {
            verifyInput();
        }
    });

    confirmEditText.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence charSequence, int i, int i2, int i3) {

        }

        @Override
        public void onTextChanged(CharSequence charSequence, int i, int i2, int i3) {

        }

        @Override
        public void afterTextChanged(Editable editable) {
            verifyInput();
        }
    });

    String oldPassword = getSharedPreferences().getString("password", "");
    passwordEditText.setText(oldPassword);
    confirmEditText.setText(oldPassword);
}

private void verifyInput() {
    String newPassword = passwordEditText.getText().toString();
    String confirmedPassword = confirmEditText.getText().toString();

    boolean passwordOk = false;
    if (newPassword.equals(confirmedPassword)) {
        passwordOk = true;
        password = newPassword;
    }

    AlertDialog dialog = (AlertDialog) getDialog();
    if (dialog != null)
        dialog.getButton(AlertDialog.BUTTON_POSITIVE).setEnabled(passwordOk);
}

@Override
protected void onDialogClosed(boolean positiveResult) {
    super.onDialogClosed(positiveResult);

    if (!positiveResult)
        return;
    persistString(password);
}

}

    <com.abax.applocker.PasswordPreference
        android:background="@color/white"
        android:inputType="numberPassword"
        android:key="password"
        android:password="true"
        android:summary="Edit the Unlock password"
        android:title="Edit Password" />

使用此

Answer 5

我如下解决了。

resolved code
getEditText().setInputType(
    TYPE_CLASS_NUMBER|
    TYPE_NUMBER_VARIATION_PASSWORD|
    TYPE_NUMBER_FLAG_DECIMAL);

related code

TextView class
private static boolean isPasswordInputType(int inputType) {
    int variation = inputType & 4095;
    return variation == 129 || variation == 225 || variation == 18;
}

variation == 18 -> 
public static final int TYPE_TEXT_VARIATION_URI = 0x00000010;
public static final int TYPE_CLASS_NUMBER = 0x00000002;