C программа для замены всех вхождений символа в строке

please use this

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/rlimg"
    android:orientation="vertical"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">

    <android.support.v7.widget.CardView
        android:id="@+id/card_view"
android:layout_width="match_parent"
        android:layout_height="wrap_content"

        android:layout_centerHorizontal="true"
        app:cardUseCompatPadding="true"
        app:cardPreventCornerOverlap="false"
        android:innerRadius="0dp"
        android:radius="0dp"

        android:shape="ring"
        android:thicknessRatio="1.9">

        <RelativeLayout

            android:layout_width="match_parent"
            android:layout_height="match_parent">
            <ImageView
                android:id="@+id/imgperformarbg"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:fitsSystemWindows="true"
                android:scaleType="centerCrop"
                android:src="@drawable/h" />

            <ImageView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_gravity="bottom"
                android:scaleType="fitXY"
                android:src="@drawable/h"/>

        </RelativeLayout
            >

    </android.support.v7.widget.CardView>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/card_view"
        android:orientation="vertical">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Name"
            android:textColor="#E6000000"
            android:lineSpacingMultiplier=".9"
            android:minLines="1"
            android:maxLines="2"
            android:id="@+id/txtperformarname"
            />
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Detail"

            android:textColor="#CC000000"

            android:layout_below="@+id/txtperformarname"
            android:visibility="visible"
            android:id="@+id/txtdetails"
            />
    </LinearLayout>



</RelativeLayout>