添加不透明的“阴影"(大纲)到 Android TextView

我尝试了其他帖子中的所有技巧、技巧和窍门，例如

I have a TextView in my Activity to which I want to add a shadow. It is supposed to look like in OsmAnd (100% opaque):

But it looks like this:

You can see that the current shadow is blurred and fades away. I want a solid, opaque shadow. But how?

My current code is:

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/speedTextView"
    android:text="25 km/h"

    android:textSize="24sp"
    android:textStyle="bold"
    android:textColor="#000000"
    android:shadowColor="#ffffff"
    android:shadowDx="0"
    android:shadowDy="0"
    android:shadowRadius="6"
/>

I tried all the hacks, tips and tricks in the other posts like here, here and here.

None of them works that great or looks so good.

Now this is how you really do it (found in the Source of the OsmAnd app):

You use a FrameLayout (which has the characteristic of laying its components over each other) and put 2 TextViews inside at the same position.

MainActivity.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
    android:background="#445566">

    <FrameLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="top"
        android:layout_weight="1">

        <TextView
            android:id="@+id/textViewShadowId"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="top"
            android:textSize="36sp"
            android:text="123 ABC" 
            android:textColor="#ffffff" />

        <TextView
            android:id="@+id/textViewId"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="top"
            android:textSize="36sp"
            android:text="123 ABC"
            android:textColor="#000000" />
    </FrameLayout>

</LinearLayout>

And in the onCreate method of your activity you set the stroke width of the shadow TextView and change it from FILL to STROKE:

import android.graphics.Paint;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;
    
public class MainActivity extends AppCompatActivity {    

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    
        //here comes the magic
        TextView textViewShadow = (TextView) findViewById(R.id.textViewShadowId);
        textViewShadow.getPaint().setStrokeWidth(5);
        textViewShadow.getPaint().setStyle(Paint.Style.STROKE);
    }
}

The result looks like this: