改变形状的颜色

时间:2015-08-19 04:25:16

标签: android android-layout android-activity android-xml

我有以下形状可绘制:

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <shape
            xmlns:android="http://schemas.android.com/apk/res/android"
            android:shape="oval">
            <solid
                android:color="#000000"
                />
            <size
                android:width="100dp"
                android:height="100dp"
                />
        </shape>
    </item>
</layer-list>

从我的主要版面调用它就是这样的:

<ImageView
    android:id="@+id/circle_bg"
    android:layout_width="100dp"
    android:layout_height="100dp"
    android:layout_alignParentLeft="true"
    android:background="@drawable/circle_bg" />

我有一个适配器,用于使用其他数据填充布局,但其中一个数据是十六进制颜色代码。以下是我如何填充布局主要内容的示例:

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    Post post = getItem(position);

    if (convertView == null) {
        convertView = LayoutInflater.from(getContext()).inflate(R.layout.post_layout, parent, false);
    }

    TextView content = (TextView) convertView.findViewById(R.id.content);
    content.setText(article.getContent());

    return convertView;
}

填充布局的这一部分:

<TextView
    android:id="@+id/content"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    />

我怎么能以编程方式对形状做同样的事情,以便我可以改变它的颜色?

2 个答案:

答案 0 :(得分:0)

您可以使用ShapeDrawable访问代码中的形状,然后将getView方法中的Shape颜色更改为:

@Override
public View getView(int position, View convertView, ViewGroup parent) {

Post post = getItem(position);

    if (convertView == null) {
        convertView = LayoutInflater.from(getContext()).inflate(R.layout.post_layout, parent, false);
    }

    ImageView content = (ImageView)convertView.findViewById(R.id.content);
    ShapeDrawable ovalShape = (ShapeDrawable)content.getBackGround();
    ovalShape.getPaint().setColor(Color.parseColor("hexcolor"));
    return convertView;
}

P.S。 - 这是一个伪代码

答案 1 :(得分:0)

@Override
public View getView(int position, View convertView, ViewGroup parent) {

Post post = getItem(position);

    if (convertView == null) {
        convertView = LayoutInflater.from(getContext()).inflate(R.layout.post_layout, parent, false);
    }

    ImageView content = (ImageView)convertView.findViewById(R.id.content);
    LayerDrawable ovalShape = (LayerDrawable)content.getBackGround();
    ovalShape.setColorFilter(Color.parseColor("hexcolor"), PorterDuff.Mode.SRC);
    return convertView;
}