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，我希望能够在布局文件中更改此颜色。

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的自定义视图。我的一个自定义属性是背景颜色。

<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);
    }
}

也许我在思考它。在答案中免费提供创意。提前谢谢

Answer 1

尝试以下代码 -

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

Answer 2

您必须为每种颜色创建单独的drawable，因为无法在运行时设置这些属性 - 因为应用程序必须编译它们。

通过布局更改xml可绘制文件中的形状颜色

2 个答案: