FloatingActionButton with text instead of image

Thanks to all.

Here is easy workaround which I found for this question. Works correctly for Android 4+, for Android 5+ is added specific parameter android:elevation to draw TextView over FloatingActionButton.

<FrameLayout    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_gravity="bottom|right">    <android.support.design.widget.FloatingActionButton        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:src="@android:color/transparent" />    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_gravity="center"        android:text="@android:string/ok"        android:elevation="16dp"        android:textColor="@android:color/white"        android:textAppearance="?android:attr/textAppearanceMedium" /></FrameLayout>

convert a text into bitmap and use it. its super easy.

fab.setImageBitmap(textAsBitmap("OK", 40, Color.WHITE));//method to convert your text to imagepublic static Bitmap textAsBitmap(String text, float textSize, int textColor) {    Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);    paint.setTextSize(textSize);    paint.setColor(textColor);    paint.setTextAlign(Paint.Align.LEFT);    float baseline = -paint.ascent(); // ascent() is negative    int width = (int) (paint.measureText(text) + 0.0f); // round    int height = (int) (baseline + paint.descent() + 0.0f);    Bitmap image = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);    Canvas canvas = new Canvas(image);    canvas.drawText(text, 0, baseline, paint);    return image;}

With API 28 you can simply add text to Fabs using:

Visit: https://material.io/develop/android/components/extended-floating-action-button/

 <com.google.android.material.floatingactionbutton.ExtendedFloatingActionButton      android:layout_width="wrap_content"      android:layout_height="wrap_content"      android:layout_margin="8dp"      android:contentDescription="@string/extended_fab_content_desc"      android:text="@string/extended_fab_label"      app:icon="@drawable/ic_plus_24px"      app:layout_anchor="@id/app_bar"      app:layout_anchorGravity="bottom|right|end"/>