Android使用getIdentifier()获取资源Id

使用getIdentifier()方法可以方便的获各应用包下的指定资源ID。

方式一
int indentify = getResources().getIdentifier(“com.test.demo:drawable/icon”,null,null);

第一个参数格式是：包名 + : +资源文件夹名 + / +资源名；是这种格式 然后其他的可以为null

方式二
intindentify= getResources().getIdentifier(“icon”, “drawable”, “com.test.demo”);

第一个参数为ID名，第二个为资源属性是ID或者是Drawable，第三个为包名。

示例代码：

import java.lang.reflect.Field;
import android.content.Context;

public class ResourceUtil {
    private static Context sContext;

    public static void init(Context context) {
        if (context != null)
            sContext = context;
    }

    public static int getLayoutId(String paramString) {
        if (sContext == null)
            return 0;
        return sContext.getResources().getIdentifier(paramString, "layout", sContext.getPackageName());
    }

    public static int getStringId(String paramString) {
        if (sContext == null)
            return 0;
        return sContext.getResources().getIdentifier(paramString, "string",
                sContext.getPackageName());
    }

    public static int getDrawableId(String paramString) {
        if (sContext == null)
            return 0;
        return sContext.getResources().getIdentifier(paramString, "drawable", sContext.getPackageName());
    }

    public static int getStyleId(String paramString) {
        if (sContext == null)
            return 0;
        return sContext.getResources().getIdentifier(paramString, "style",
                sContext.getPackageName());
    }

    public static int getId(String paramString) {
        if (sContext == null)
            return 0;
        return sContext.getResources().getIdentifier(paramString, "id",
                sContext.getPackageName());
    }

    public static int getColorId(String paramString) {
        if (sContext == null)
            return 0;
        return sContext.getResources().getIdentifier(paramString, "color", sContext.getPackageName());
    }

    public static int getDimenId(String paramString) {
        if (sContext == null)
            return 0;
        return sContext.getResources().getIdentifier(paramString, "dimen",
                sContext.getPackageName());
    }

    public static int getAnimId(String paramString) {
        if (sContext == null)
            return 0;
        return sContext.getResources().getIdentifier(paramString, "anim", sContext.getPackageName());
    }

    // 通过反射实现
    public static final int[] getStyleableIntArray(String name) {
        try {
            if (sContext == null)
                return null;
            Field field = Class.forName(sContext.getPackageName() + ".R$styleable").getDeclaredField(name);
            int[] ret = (int[]) field.get(null);
            return ret;
        } catch (Throwable t) {
        }
        return null;
    }

    public static final int getStyleableIntArrayIndex(String name) {
        try {
            if (sContext == null)
                return 0;
            // use reflection to access the resource class
            Field field = Class.forName(sContext.getPackageName() + ".R$styleable").getDeclaredField(name);
            int ret = (Integer) field.get(null);
            return ret;
        } catch (Throwable t) {
        }
        return 0;
    }

}