将日志写到手机文件

package com.bsoft.common.util;

import android.util.Log;

import com.bsoft.baselib.util.ContextUtil;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;

/**
 * Created by shengqf
 * Email : [email protected]
 * date : 2021/9/15
 * describe :
 */
public class MyLogUtil {
    
    

    public static void d(String tag, String content) {
    
    
        Log.d(tag, content);

        //日志内容写到本地
        writeLogToFile(content);
    }

    //将日志信息写到本地文件
    private static void writeLogToFile(String content) {
    
    
        File externalFilesDir = ContextUtil.getContext().getExternalFilesDir(null);
        assert externalFilesDir != null;
        String logPath = externalFilesDir.getPath() + "/log/";
        File dirFile = new File(logPath);
        boolean mkResult = true;
        if (!dirFile.exists()) {
    
    
            mkResult = dirFile.mkdirs();
        }
        if (!mkResult) {
    
    
            Log.e("TAG", "log目录创建失败");
            return;
        }

        //日志文件
        File file = new File(dirFile.getPath(), dateFormat("yyyy-MM-dd") + "_log.txt");
        //往日志文件写的内容
        String log = dateFormat("yyyy-MM-dd HH:mm:ss") + " : " + content + "\n";

        boolean createResult;
        if (!file.exists()) {
    
    
            try {
    
    
                createResult = file.createNewFile();
                if (createResult) {
    
    
                    writeLogToFile(log, file);
                } else {
    
    
                    Log.e("TAG", "日志文件创建失败");
                }
            } catch (IOException e) {
    
    
                e.printStackTrace();
            }
        } else {
    
    
            writeLogToFile(log, file);
        }
    }

    /**
     * 往手机日志文件里写日志
     *
     * @param file 日志文件
     * @param log  日志内容
     */
    private static void writeLogToFile(String log, File file) {
    
    
        FileWriter filerWriter;
        try {
    
    
            //true表示接上文、不覆盖往后接着写
            filerWriter = new FileWriter(file, true);
            BufferedWriter bufWriter = new BufferedWriter(filerWriter);
            bufWriter.write(log);
            bufWriter.newLine();
            bufWriter.close();
            filerWriter.close();
        } catch (IOException e) {
    
    
            e.printStackTrace();
        }
    }

    private static String dateFormat(String format) {
    
    
        SimpleDateFormat sdf = new SimpleDateFormat(format, Locale.getDefault());
        return sdf.format(new Date());
    }

}