android - 通过布局更改 xml 可绘制文件中形状的颜色

Question

所以我创建了这个名为 rounded_rect 的可绘制 xml 文件。我最初将其颜色设置为红色。但是我希望能够在我的布局文件中更改这种颜色。

rounded_rect.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle" android:padding="10dp">
<solid android:color="#ffff1900"/>
<corners
    android:bottomRightRadius="15dp"
    android:bottomLeftRadius="15dp"
    android:topLeftRadius="15dp"
    android:topRightRadius="15dp"/>

<stroke android:width="4dp"
    android:color="#000000"/>
</shape>

我的布局文件包含一个名为 ItemView 的自定义 View 。我的自定义属性之一是背景颜色。

<custonview.android.example.com.customview.ItemView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    custom:imagePath="@drawable/yes"
    custom:text="Yes"

    custom:backgroundColor="#000000"

    android:layout_row="0"
    android:layout_column="0"
    android:background="@drawable/rounded_rect_green"
    android:layout_margin="30dp" />

目标是能够将可绘制文件中的颜色更改为我在布局文件中指定的颜色。这是我的 ItemView.java 文件

public class ItemView extends View {

    //attributes of item view
    private Drawable drawable;
    private String text;
    private int backgroundColor;

    private int width, height;
    private Paint paint;

    public ItemView(Context context, AttributeSet attrs) {
        super(context, attrs);
        TypedArray a = context.getTheme().obtainStyledAttributes(attrs,
                R.styleable.ItemView, 0, 0);
        try {
            text = a.getString(R.styleable.ItemView_text);
            backgroundColor = a.getInteger(R.styleable.ItemView_backgroundColor, 0);
            drawable = a.getDrawable(R.styleable.ItemView_imagePath);
        } finally {

        }
        paint = new Paint();
        width = drawable.getMinimumWidth() / 2;
        height = drawable.getMinimumHeight() / 2;
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        setMeasuredDimension(width, height);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        //positions the image in the middle horizontally and a little above the text below
        drawable.setBounds(width / 4, height / 4 - 50, width - (width / 4),
                height - (height / 4) - 50);
        drawable.draw(canvas);

        paint.setTextSize(100);
        paint.setColor(Color.BLACK);
        canvas.drawText(text, width / 2 -
                paint.measureText(text, 0, text.length()) / 2, height - 50, paint);
    }
}

• 也许我考虑过度了。在您的答案中自由发挥创意。提前致谢

Answer 1

试试下面的代码-

GradientDrawable bgShape = (GradientDrawable)yourview.getBackground();
        bgShape.setColor(Color.MAGENTA);