Android动态生成Selector选择器代码

package com.com.uuke.utils;

import android.content.Context;

import android.graphics.drawable.Drawable;

import android.graphics.drawable.StateListDrawable;

/**

 * Created by Administrator on 2016/6/7.

 */

public class SelectorUtils {

    /**

     * 代码生成选择器

     * @param context 当前上下文

     * @param idNormal 默认图片id

     * @param idPressed 触摸时图片id

     * @param idFocused 获得焦点时图片id

     * @param idUnable 没有选中时图片id

     * @return

     */

    public static StateListDrawable newSelector(Context context, int idNormal, int idPressed, int idFocused,int idUnable) {

        StateListDrawable bg = new StateListDrawable();

        Drawable normal = idNormal == -1 ? null : context.getResources().getDrawable(idNormal);

        Drawable pressed = idPressed == -1 ? null : context.getResources().getDrawable(idPressed);

        Drawable focused = idFocused == -1 ? null : context.getResources().getDrawable(idFocused);

        Drawable unable = idUnable == -1 ? null : context.getResources().getDrawable(idUnable);

        // View.PRESSED_ENABLED_STATE_SET

        bg.addState(new int[] { android.R.attr.state_pressed, android.R.attr.state_enabled }, pressed);

        // View.ENABLED_FOCUSED_STATE_SET

        bg.addState(new int[] { android.R.attr.state_enabled, android.R.attr.state_focused }, focused);

        // View.ENABLED_STATE_SET

        bg.addState(new int[] { android.R.attr.state_enabled }, normal);

        // View.FOCUSED_STATE_SET

        bg.addState(new int[] { android.R.attr.state_focused }, focused);

        // View.WINDOW_FOCUSED_STATE_SET

        bg.addState(new int[] { android.R.attr.state_window_focused }, unable);

        // View.EMPTY_STATE_SET

        bg.addState(new int[] {}, normal);

        return bg;

    }

    /**

     * 控件选择器

     *

     * @param context 当前上下文

     * @param idNormal 默认图片id

     * @param idPressed 按压时图片id

     * @return

     */

    public static StateListDrawable setSelector(Context context,int idNormal,int idPressed){

        StateListDrawable bg=new StateListDrawable();

        Drawable normal = idNormal == -1 ? null : context.getResources().getDrawable(idNormal);

        Drawable pressed = idPressed == -1 ? null : context.getResources().getDrawable(idPressed);

        bg.addState(new int[] { android.R.attr.state_pressed, android.R.attr.state_enabled }, pressed);

        bg.addState(new int[] { android.R.attr.state_enabled }, normal);

        bg.addState(new int[] {}, normal);

        return bg;

    }

}