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;
}

}
转载原文地址：
http://blog.csdn.net/aprilqq/article/details/53081016