Android Log 工具类

import android.text.TextUtils;  
import android.util.Log;  
  
/** 
 * Created by shen on 2016/2/28. 
 */  
public class LogUtil {  
    public static String tagPrefix = "";  
    public static boolean showV = true;  
    public static boolean showD = true;  
    public static boolean showI = true;  
    public static boolean showW = true;  
    public static boolean showE = true;  
    public static boolean showWTF = true;  
  
    /** 
     * 得到tag（所在类.方法（L:行）） 
     * @return 
     */  
    private static String generateTag() {  
        StackTraceElement stackTraceElement = Thread.currentThread().getStackTrace()[4];  
        String callerClazzName = stackTraceElement.getClassName();  
        callerClazzName = callerClazzName.substring(callerClazzName.lastIndexOf(".") + 1);  
        String tag = "%s.%s(L:%d)";  
        tag = String.format(tag, new Object[]{callerClazzName, stackTraceElement.getMethodName(), Integer.valueOf(stackTraceElement.getLineNumber())});  
        //给tag设置前缀  
        tag = TextUtils.isEmpty(tagPrefix) ? tag : tagPrefix + ":" + tag;  
        return tag;  
    }  
  
    public static void v(String msg) {  
        if (showV) {  
            String tag = generateTag();  
            Log.v(tag, msg);  
        }  
    }  
  
    public static void v(String msg, Throwable tr) {  
        if (showV) {  
            String tag = generateTag();  
            Log.v(tag, msg, tr);  
        }  
    }  
  
    public static void d(String msg) {  
        if (showD) {  
            String tag = generateTag();  
            Log.d(tag, msg);  
        }  
    }  
  
    public static void d(String msg, Throwable tr) {  
        if (showD) {  
            String tag = generateTag();  
            Log.d(tag, msg, tr);  
        }  
    }  
  
    public static void i(String msg) {  
        if (showI) {  
            String tag = generateTag();  
            Log.i(tag, msg);  
        }  
    }  
  
    public static void i(String msg, Throwable tr) {  
        if (showI) {  
            String tag = generateTag();  
            Log.i(tag, msg, tr);  
        }  
    }  
  
    public static void w(String msg) {  
        if (showW) {  
            String tag = generateTag();  
            Log.w(tag, msg);  
        }  
    }  
  
    public static void w(String msg, Throwable tr) {  
        if (showW) {  
            String tag = generateTag();  
            Log.w(tag, msg, tr);  
        }  
    }  
  
    public static void e(String msg) {  
        if (showE) {  
            String tag = generateTag();  
            Log.e(tag, msg);  
        }  
    }  
  
    public static void e(String msg, Throwable tr) {  
        if (showE) {  
            String tag = generateTag();  
            Log.e(tag, msg, tr);  
        }  
    }  
  
    public static void wtf(String msg) {  
        if (showWTF) {  
            String tag = generateTag();  
            Log.wtf(tag, msg);  
        }  
    }  
  
    public static void wtf(String msg, Throwable tr) {  
        if (showWTF) {  
            String tag = generateTag();  
            Log.wtf(tag, msg, tr);  
        }  
    }  
}