自定义流布局FloatLayout(二)之如何在代码中定义shape资源

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