android 笔记

基本内容

包结构

Android项目目录结构模板以及简单说明【简单版】
https://www.cnblogs.com/whycxb/p/9739148.html

常用插件

https://blog.csdn.net/jia635/article/details/78811892

使用 lambda

app build.gradle 添加

android {

    compileOptions {
        sourceCompatibility = '1.8'
        targetCompatibility = '1.8'
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}

log 封装

import android.util.Log;

import com.laolang.shopone.helloj.BuildConfig;

public class LogUtil {
    static String className;//类名
    static String methodName;//方法名
    static int lineNumber;//行数

    /**
     * 判断是否可以调试
     * @return
     */
    public static boolean isDebuggable() {
        return BuildConfig.DEBUG;
    }

    private static String createLog(String log ) {
        StringBuffer buffer = new StringBuffer();
        buffer.append("================");
        buffer.append(methodName);
        buffer.append("(").append(className).append(":").append(lineNumber).append(")================:");
        buffer.append(log);
        return buffer.toString();
    }

    /**
     * 获取文件名、方法名、所在行数
     * @param sElements
     */
    private static void getMethodNames(StackTraceElement[] sElements){
        className = sElements[1].getFileName();
        methodName = sElements[1].getMethodName();
        lineNumber = sElements[1].getLineNumber();
    }

    public static void e(String message){
        if (!isDebuggable())
            return;
        getMethodNames(new Throwable().getStackTrace());
        Log.e(className, createLog(message));
    }

    public static void i(String message){
        if (!isDebuggable())
            return;
        getMethodNames(new Throwable().getStackTrace());
        Log.i(className, createLog(message));
    }

    public static void d(String message){
        if (!isDebuggable())
            return;
        getMethodNames(new Throwable().getStackTrace());
        Log.d(className, createLog(message));
    }

    public static void v(String message){
        if (!isDebuggable())
            return;
        getMethodNames(new Throwable().getStackTrace());
        Log.v(className, createLog(message));
    }

    public static void w(String message){
        if (!isDebuggable())
            return;
        getMethodNames(new Throwable().getStackTrace());
        Log.w(className, createLog(message));
    }
}

效果