我使用这个解决方案来切换字体取决于提示可见性。它与Joe的答案类似，但扩展了EditText:

public class PasswordEditText extends android.support.v7.widget.AppCompatEditText {

    public PasswordEditText(Context context) {
        super(context);
    }

    public PasswordEditText(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public PasswordEditText(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    protected void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
        super.onTextChanged(text, start, lengthBefore, lengthAfter);
        if (text.length() > 0) setTypeface(Typeface.MONOSPACE);
        else setTypeface(Typeface.DEFAULT);
    }

}

setTransformationMethod方法打破了android:imeOption，并允许回车输入密码字段。相反，我这样做:

setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD);
setTypeface(Typeface.DEFAULT);

我没有在XML中设置android:password="true"。

manisha提供的答案是可以工作的，但是与默认值相比，它使密码字段处于非标准状态。也就是说，默认字体也应用于密码字段，包括圆点替换和在被圆点替换之前出现的预览字符(以及当它是“可见密码”字段时)。

为了解决这个问题，并使它1)看起来和行为完全像默认的textPassword输入类型，但也2)允许提示文本出现在默认(非monospace)字体，你需要在字段上有一个TextWatcher，可以在字体之间正确地切换字体。默认和字体。MONOSPACE基于它是否为空。我创建了一个助手类，可以用来完成这一点:

import android.graphics.Typeface;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.inputmethod.EditorInfo;
import android.widget.TextView;

/**
 * This class watches the text input in a password field in order to toggle the field's font so that the hint text
 * appears in a normal font and the password appears as monospace.
 *
 * <p />
 * Works around an issue with the Hint typeface.
 *
 * @author jhansche
 * @see <a
 * href="http://stackoverflow.com/questions/3406534/password-hint-font-in-android">http://stackoverflow.com/questions/3406534/password-hint-font-in-android</a>
 */
public class PasswordFontfaceWatcher implements TextWatcher {
    private static final int TEXT_VARIATION_PASSWORD =
            (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD);
    private TextView mView;

    /**
     * Register a new watcher for this {@code TextView} to alter the fontface based on the field's contents.
     *
     * <p />
     * This is only necessary for a textPassword field that has a non-empty hint text. A view not meeting these
     * conditions will incur no side effects.
     *
     * @param view
     */
    public static void register(TextView view) {
        final CharSequence hint = view.getHint();
        final int inputType = view.getInputType();
        final boolean isPassword = ((inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION))
                == TEXT_VARIATION_PASSWORD);

        if (isPassword && hint != null && !"".equals(hint)) {
            PasswordFontfaceWatcher obj = new PasswordFontfaceWatcher(view);
            view.addTextChangedListener(obj);

            if (view.length() > 0) {
                obj.setMonospaceFont();
            } else {
                obj.setDefaultFont();
            }
        }
    }

    public PasswordFontfaceWatcher(TextView view) {
        mView = view;
    }

    public void onTextChanged(final CharSequence s, final int start, final int before, final int count) {
        // Not needed
    }

    public void beforeTextChanged(final CharSequence s, final int start, final int count, final int after) {
        if (s.length() == 0 && after > 0) {
            // Input field went from empty to non-empty
            setMonospaceFont();
        }
    }

    public void afterTextChanged(final Editable s) {
        if (s.length() == 0) {
            // Input field went from non-empty to empty
            setDefaultFont();
        }
    }

    public void setDefaultFont() {
        mView.setTypeface(Typeface.DEFAULT);
    }

    public void setMonospaceFont() {
        mView.setTypeface(Typeface.MONOSPACE);
    }
}

然后要使用它，你所需要做的就是调用register(View)静态方法。其他一切都是自动的(包括跳过工作区，如果视图不需要它!):

    final EditText txtPassword = (EditText) view.findViewById(R.id.txt_password);
    PasswordFontfaceWatcher.register(txtPassword);

这是如何使输入密码有提示，不转换为*和默认字体!!

关于XML:

android:inputType="textPassword"
android:gravity="center"
android:ellipsize="start"
android:hint="Input Password !."

活动介绍:

inputPassword.setTypeface(Typeface.DEFAULT);

感谢芒果和rjjr的洞察力:D。

使用书法图书馆。

然后它仍然不会用正确的字体更新密码字段。所以在代码中，而不是在xml中:

Typeface typeface_temp = editText.getTypeface();
editText.setInputType(inputType); /*whatever inputType you want like "TYPE_TEXT_FLAG_NO_SUGGESTIONS"*/
//font is now messed up ..set it back with the below call
editText.setTypeface(typeface_temp); 

其他答案是大多数情况下的正确解决方案。

但是，如果使用自定义EditText子类，比如在默认情况下应用自定义字体，就会出现一个微妙的问题。如果你在子类的构造函数中设置了自定义字体，如果你设置inputType="textPassword"，它仍然会被系统覆盖。

在这种情况下，移动你的样式到onAttachedToWindow后你的超级。onAttachedToWindow电话。

示例实现:

package net.petosky.android.ui;

import android.content.Context;
import android.graphics.Typeface;
import android.util.AttributeSet;
import android.widget.EditText;

/**
 * An EditText that applies a custom font.
 *
 * @author cory@petosky.net
 */
public class EditTextWithCustomFont extends EditText {

    private static Typeface customTypeface;

    public EditTextWithCustomFont(Context context) {
        super(context);
    }

    public EditTextWithCustomFont(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public EditTextWithCustomFont(
            Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    /**
     * Load and store the custom typeface for this app.
     *
     * You should have a font file in: project-root/assets/fonts/
     */
    private static Typeface getTypeface(Context context) {
        if (customTypeface == null) {
            customTypeface = Typeface.createFromAsset(
                    context.getAssets(), "fonts/my_font.ttf");
        }
        return customTypeface;
    }

    /**
     * Set a custom font for our EditText.
     *
     * We do this in onAttachedToWindow instead of the constructor to support
     * password input types. Internally in TextView, setting the password
     * input type overwrites the specified typeface with the system default
     * monospace.
     */
    @Override protected void onAttachedToWindow() {
        super.onAttachedToWindow();
        // Our fonts aren't present in developer tools, like live UI
        // preview in AndroidStudio.
        if (!isInEditMode()) {
            setTypeface(getTypeface(getContext()));
        }
    }
}