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问题:

I'm working on and activity with arabic language. I want the hint of the username and password to start from the right and I have no problem f typing started from the left but in my UI I want the hint to be of the right side. But when I'm adding the inputType for the EditText the hint moves to the left.I tried solving it programmatically but it didn't work.

Java

    EditText password = (EditText) findViewById(R.id.input_password);
    password.setTypeface(Typeface.DEFAULT);

XML

<EditText
            android:id="@+id/input_password"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:hint="كلمة المرور"
            android:textColorHint="#FFFFFF"
            android:inputType="textPassword"
            android:background="@null"
            android:textColor="#FFFFFF"
            android:textSize="20dp"/>

回答1:

This is a bug in the Android Framework, for EditText fields in Android 4.4+ : https://code.google.com/p/android/issues/detail?id=201471. As of July 2016, it is currently unsolved.

However there is a way to workaround it:

To make the hint display properly on the right (in right-to-left/RTL mode), you must remove the InputType property textPassword (InputType.TYPE_TEXT_VARIATION_PASSWORD), when there is no text entered.
To retain the password entry field behaviour of showing dots to conceal typed text, you must dynamically enable InputType.TYPE_TEXT_VARIATION_PASSWORD, when the first character is entered in. And it must be reset when all characters are deleted.
To prevent the UI glitch of Latin character input (LTR text like "abc123") jumping to the left or disappearing altogether, you must explicitly set textDirection to RTL.

Here are the details:

Pre-requisite for your AndroidManifest.xml:

<application
    ...
    android:supportsRtl="true"
    ... >
</application>

Your XML Layout contains:

     <EditText
        android:id="@+id/password"
        android:inputType="textPassword"
        android:hint="סיסמא"
        ... />

Java code with workaround bug fix:

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.login_fragment_layout, container, false);
    final EditText password = (EditText) view.findViewById(R.id.password);

    // Workaround https://issuetracker.google.com/issues/37082815 for Android 4.4+
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT && isRTL(getActivity())) {

        // Force a right-aligned text entry, otherwise latin character input,
        // like "abc123", will jump to the left and may even disappear!
        password.setTextDirection(View.TEXT_DIRECTION_RTL);

        // Make the "Enter password" hint display on the right hand side
        password.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS);
    }

    password.addTextChangedListener(new TextWatcher() {

        boolean inputTypeChanged;

        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {}

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {}

        @Override
        public void afterTextChanged(Editable s) {

            // Workaround https://code.google.com/p/android/issues/detail?id=201471 for Android 4.4+
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT && isRTL(getActivity())) {
                if (s.length() > 0) {
                    if (!inputTypeChanged) {

                        // When a character is typed, dynamically change the EditText's
                        // InputType to PASSWORD, to show the dots and conceal the typed characters.
                        password.setInputType(InputType.TYPE_CLASS_TEXT |
                                InputType.TYPE_TEXT_VARIATION_PASSWORD |
                                InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS);

                        // Move the cursor to the correct place (after the typed character)
                        password.setSelection(s.length());

                        inputTypeChanged = true;
                    }
                } else {
                    // Reset EditText: Make the "Enter password" hint display on the right
                    password.setInputType(InputType.TYPE_CLASS_TEXT |
                            InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS);

                    inputTypeChanged = false;
                }
            }
        }
    });

    return view;
}

public static boolean isRTL(Context context) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
        return context.getResources().getConfiguration().getLayoutDirection()
                == View.LAYOUT_DIRECTION_RTL;
        // Another way:
        // Define a boolean resource as "true" in res/values-ldrtl
        // and "false" in res/values
        // return context.getResources().getBoolean(R.bool.is_right_to_left);
    } else {
        return false;
    }
}

回答2:

Use Gravity Attribute to Adjust the Hint for EditText

        <EditText
        android:id="@+id/input_password"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:hint="كلمة المرور"
        android:textColorHint="#FFFFFF"
        android:gravity="right"
        android:inputType="textPassword"
        android:background="@null"
        android:textColor="#FFFFFF"
        android:textSize="20dp"/>

回答3:

add gravity right try this way

<EditText
            android:id="@+id/input_password"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:hint="كلمة المرور"
            android:textColorHint="#FFFFFF"
            android:inputType="textPassword"
            android:background="@null"
            android:textColor="#FFFFFF"
            android:textSize="20dp"
            android:gravity="right"/>

if your API level 17 and higher you can use

android:textDirection="anyRtl"

回答4:

Use 'gravity' attribute:

<EditText
    android:id="@+id/input_password"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:hint="كلمة المرور"
    android:textColorHint="#FFFFFF"
    android:gravity="right"
    android:inputType="textPassword"
    android:background="@null"
    android:textColor="#FFFFFF"
    android:textSize="20dp"/>

回答5:

I think you can fix it by adding \u202B to the Hebrew/Arabic (or any other RTL language) text .

Example:

<LinearLayout
        xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools"
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context=".MainActivity">

    <EditText android:hint="Enter a number..." android:id="@+id/editText"
              android:layout_width="match_parent"
              android:layout_height="wrap_content" android:inputType="number"/>

    <EditText android:hint="\u202Bהכנס מספר..." android:id="@+id/editText2"
              android:layout_width="match_parent"
              android:layout_height="wrap_content" android:inputType="number"/>
</LinearLayout>

Sadly it seems it doesn't get shown on the layout preview, but it worked for me on a real device. Wrote about it here