自定义流布局FloatLayout(二)之如何在代码中定义shape资源

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上次讲解了如何定义一个ViewGroup的流布局容器,这次具体讲一下容器中填充的TextView的具体设置

1.动态添加那么设置圆角矩形的时候就不能再Drawable文件下通过创建shape资源来定义了,那么如何在代码中动态的定义圆角矩形的shape呢

2.定义一个获取shapedrawable的类,通过传入参数就可以得到一个shape资源,然后利用随机数对它进行设置颜色代码如下:

package zz.itcast.googleplay09.utils;import java.util.GregorianCalendar;import android.graphics.Color;import android.graphics.drawable.Drawable;import android.graphics.drawable.GradientDrawable;import android.graphics.drawable.ShapeDrawable;import android.graphics.drawable.StateListDrawable;public class DrawableUtils {    /**     * 创建圆角矩形     * color:圆角矩形颜色     */    public static Drawable createCornerRect(int color){        //创建圆角矩形的核心类        GradientDrawable gradientDrawable = new GradientDrawable();                //设置圆角矩形的半径        gradientDrawable.setCornerRadius(5);        gradientDrawable.setColor(color);        return gradientDrawable;    }    /**     * 创建状态选择器     * @param pressedDrawable     * @param normalDrawable     * @return     */    public static Drawable createSelector(Drawable pressedDrawable,Drawable normalDrawable){        StateListDrawable stateListDrawable = new StateListDrawable();        //stateSet 状态集合，可以添加多种状态        stateListDrawable.addState(new int [] {android.R.attr.state_pressed}, pressedDrawable);        stateListDrawable.addState(new int [] {}, normalDrawable);        return stateListDrawable;            }    }

然后就是在代码中开始使用了

    @Override    public View createSuccessView() {//        TextView textView = new TextView(getActivity());//        textView.setText(datas.toString());//        return textView;        //textivew的padding        int textPaddingV = UIUtils.dip2px(4);        int textPaddingH = UIUtils.dip2px(7);        int space = UIUtils.dip2px(13);        ScrollView scrollView = new ScrollView(UIUtils.getAppContext());        FlowLayout flowLayout = new FlowLayout(UIUtils.getAppContext());        flowLayout.setPadding(space, space, space, space);//        linearLayout.setOrientation(LinearLayout.VERTICAL);//垂直的线性布局        for (int i = 0; i < datas.size(); i++) {            final String content = datas.get(i);            TextView textView = new TextView(UIUtils.getAppContext());            textView.setText(content);            //0-255            Random random = new Random();            int red = random.nextInt(200)+20;//0-199,20-219这里的处理主要是为了避开纯白色和纯黑色的背景颜色            int green = random.nextInt(200)+20;            int blue = random.nextInt(200)+20;            //设置背景//            textView.setBackground(DrawableUtils.createCornerRect());            int randomColor = Color.rgb(red, green, blue);            Drawable normalDrawable = DrawableUtils.createCornerRect(randomColor);            Drawable pressedDrawable = DrawableUtils.createCornerRect(R.color.order_text_pressed_color);            Drawable selectorDrawable = DrawableUtils.createSelector(pressedDrawable, normalDrawable);            textView.setBackgroundDrawable(selectorDrawable);            //textView添加padding            textView.setPadding(textPaddingH, textPaddingV, textPaddingH, textPaddingV);            //textview设置字体大小            textView.setTextSize(TypedValue.COMPLEX_UNIT_DIP, 15);            //设置字体颜色            textView.setTextColor(Color.WHITE);            //textview添加点击事件,否则TextView默认状态下是不能响应点击事件的,selector也就起不了作用            textView.setOnClickListener(new OnClickListener()            {                                @Override                public void onClick(View v) {                    Toast.makeText(UIUtils.getAppContext(),                             content, Toast.LENGTH_SHORT).show();                                    }            });            //textview宽高都是包裹内容            LayoutParams textViewLayoutParams = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);            flowLayout.addView(textView,textViewLayoutParams);        }        scrollView.addView(flowLayout);        return scrollView;    }

至此,这个自定义的效果就完全实现了

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