ResourceUtil.java

package com.team.zhuoke.utils;

import android.content.Context;
import android.content.pm.PackageManager;
import android.content.res.Resources;
import android.graphics.drawable.Drawable;
import android.view.View;
import android.widget.ImageView;

import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;

/**
 * @author: 范建海
 * @createTime: 2016/10/30 13:56
 * @className:  ResourceUtil
 * @description: 读取res目录下的内容的工具类
 * @changed by:
 */
public class ResourceUtil {
    public static final String LAYTOUT="layout";
    public static final String DRAWABLE="drawable";
    public static final String MIPMAP="mipmap";
    public static final String MENU="menu";
    public static final String RAW="raw";
    public static final String ANIM="anim";
    public static final String STRING="string";
    public static final String STYLE="style";
    public static final String STYLEABLE="styleable";
    public static final String INTEGER="integer";
    public static final String ID="id";
    public static final String DIMEN="dimen";
    public static final String COLOR="color";
    public static final String BOOL="bool";
    public static final String ATTR="attr";

    /**
     * 根据资源名获得资源id
     * @param context 上下文
     * @param name 资源名
     * @param type 资源类型
     * @return 资源id，找不到返回0
     */
    public static int getResourceId(Context context,String name,String type){
        Resources resources=null;
        PackageManager pm=context.getPackageManager();
        try {
            resources=context.getResources();
            return resources.getIdentifier(name, type, context.getPackageName());
        } catch (Exception e) {
            e.printStackTrace();
        }
        return 0;
    }
    /**
     * 从assets目录下读取文件内容
     *
     * @param context  上下文
     * @param fileName 文件名
     * @return 文件字节流
     */
    public static byte[] readBytesFromAssets(Context context, String fileName) {
        InputStream is = null;
        byte[] buffer = null;
        try {
            is = context.getAssets().open(fileName);
            int size = is.available();
            buffer = new byte[size];
            is.read(buffer);
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (is != null) {
                try {
                    is.close();
                    is = null;
                } catch (IOException e) {
                    e.printStackTrace();
                }

            }
        }
        return buffer;
    }

    /**
     * 从res/raw目录下读取文件内容
     *
     * @param context 上下文
     * @param rawId   rawId
     * @return 文件字节流
     */
    public static byte[] readBytesFromRaw(Context context, int rawId) {
        InputStream is = null;
        byte[] buffer = null;
        try {
            is = context.getResources().openRawResource(rawId);
            int size = is.available();
            buffer = new byte[size];
            is.read(buffer);
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (is != null) {
                try {
                    is.close();
                    is = null;
                } catch (IOException e) {
                    e.printStackTrace();
                }

            }
        }
        return buffer;
    }

    /**
     * 从assets目录读取文本
     *
     * @param context  上下文
     * @param fileName 文件名
     * @return 文本内容
     */
    public static String readStringFromAssets(Context context, String fileName) {
        String result = null;
        byte[] buffer = readBytesFromAssets(context, fileName);
        try {
            result = new String(buffer, "UTF-8");
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return result;
    }

    /**
     * 从raw目录读取文本
     *
     * @param context 上下文
     * @param rawId   id值
     * @return 文本内容
     */
    public static String readStringFromRaw(Context context, int rawId) {
        String result = null;
        byte[] buffer = readBytesFromRaw(context, rawId);
        try {
            result = new String(buffer, "UTF-8");
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return result;
    }

    /**
     * 获得字符串
     * @param context 上下文
     * @param strId 字符串id
     * @return 字符串
     */
    public static String getString(Context context,int strId){
        return context.getResources().getString(strId);
    }

    /**
     * 获得颜色
     * @param context 上下文
     * @param colorId 颜色id
     * @return 颜色
     */
    public static int getColor(Context context,int colorId){
        return context.getResources().getColor(colorId);
    }

    /**
     * 获得Drawable
     * @param context 上下文
     * @param drawableId Drawable的id
     * @return Drawable
     * {@link ImageView#setImageDrawable(Drawable)}
     * {@link ImageView #setImageBitmap(android.graphics.Bitmap)}
     * {@link View#setBackgroundDrawable(Drawable)}
     */
    public static Drawable getDrawable(Context context,int drawableId){
        return context.getResources().getDrawable(drawableId);
    }

    /**
     * 获取指定资源id对应的字符串数组
     * @param ctx 上下文
     * @param resID 字符串数组资源ID
     * @return (测试通过)
     */
    public static String[] getStringArray(Context ctx,int resID) {
        return ctx.getResources().getStringArray(resID);
    }

    /**
     * 获取指定资源id对应的整型数组
     * @param ctx 上下文
     * @param resID 整型数组资源ID
     * @return
     */
    public static int[] getIntArray(Context ctx,int resID) {
        return ctx.getResources().getIntArray(resID);
    }

    /**
     * 获取指定资源id对应的尺寸
     * @param ctx 上下文
     * @param resID 尺寸资源ID
     * @return (测试通过) 返回的单位为 px(dp * density = px)(sp * density = px)
     */
    public static float getDimension(Context ctx,int resID) {
        return ctx.getResources().getDimension(resID);
    }

}