Question

I’m trying to draw a custom border by drawing a custom view. Here is a sample of one side of the border:

package com.sparkydev.guessaphrase;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.drawable.ShapeDrawable;
import android.graphics.drawable.shapes.RectShape;
import android.util.AttributeSet;
import android.view.View;

public class LeftBorder extends View {
    private ShapeDrawable vertRect, horizRect;

    public LeftBorder(Context context, AttributeSet attributeset) {
        super(context, attributeset);

        int width = this.getWidth();
        int height = this.getHeight();

        vertRect = new ShapeDrawable(new RectShape());
            vertRect.getPaint().setColor(Color.RED);
            vertRect.setBounds(0, 0, width/10, height);
        horizRect = new ShapeDrawable(new RectShape());
            horizRect.getPaint().setColor(Color.RED);
            horizRect.setBounds(0, 0, width, height/9);

    }

    protected void onDraw(Canvas canvas){
        vertRect.draw(canvas);
        horizRect.draw(canvas);
    }

}

And the other side is defined pretty much the same way. The XML is defined as such:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:background="@drawable/wallpaper">


    <!-- Declares left border's position, which is
    drawn programmatically.-->
    <com.sparkydev.guessaphrase.LeftBorder
        android:id="@+id/leftborder"
        android:layout_alignParentLeft="true"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        />



        <!-- Used a FrameLayout to contain
        the menu buttons.-->
        <FrameLayout 
        android:id="@+id/FrameLayout01" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content"
        >

            <!-- Menu buttons -->

        </FrameLayout>


    <!-- Declares right border position (on right
    of screen, below the left border) -->
    <com.sparkydev.guessaphrase.RightBorder
        android:layout_alignParentRight="true"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/leftborder"
    />



</RelativeLayout>

The problem is, the borders are not showing up at all. The background shows, but nothing else.

Answer 1

From the “Building Custom Components” dev guide, when creating a custom view, it will have a set size of 100×100 until you specify otherwise. See if this has anything to do with the issue you are seeing.

“You will almost certainly want to override onMeasure() and are also likely to need to override onDraw() if you want the component to show something. While both have default behavior, the default onDraw() will do nothing, and the default onMeasure() will always set a size of 100×100 — which is probably not what you want.”