DropBoxUtil

package com.android.demo.lileidemo.utils;

import android.content.Context;
import android.os.DropBoxManager;

import com.android.demo.lileidemo.MyApplication;
import com.android.demo.lileidemo.constant.AppConstants;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * date: 04/08/2020.
 * author: lilei.
 */
public class DropBoxUtil {
    private static final String TAG = AppConstants.APP_TAG + "DropBoxUtil ";
    private static final boolean DEBUG = false;
    private static final int MAX_BYTES = 8192 * 100;
    private static final String SAVE_LOG_DIR_PATH = AppConstants.TSP_DIR + "/dropBox/";

    /**
     * Get the first entry after the specified time point, and specify the tag.
     */
    public static String getDropBoxPackageName(String tag, long time) {
        LogUtil.d(TAG + "getDropBoxPackageName() tag:" + tag + " time:" + time);
        String packageName = null;
        //Android.permission.read'logs permission needs to be added to Android manifest.
        DropBoxManager dropBoxManager = (DropBoxManager) MyApplication.getAppContext()
            .getSystemService(Context.DROPBOX_SERVICE);
        DropBoxManager.Entry entry;
        if ((entry = dropBoxManager.getNextEntry(tag, time)) != null) {
            String text = entry.getText(MAX_BYTES);
            LogUtil.d(TAG + "getDropBoxPackageName() text:" + text);
            Pattern pattern = Pattern.compile("^Process:");
            Matcher matcher = pattern.matcher(text);
            if (matcher.find()) {
                packageName = matcher.replaceAll("").trim();
                if (null != entry) {
                    entry.close();
                }
                return packageName;
            }
        }
        if (null != entry) {
            entry.close();
        }
        return null;
    }

    /**
     * Get the first entry after the specified time point, and specify the tag.
     *
     * @param tag  dropBox tag.
     * @param time dropBpx time.
     * @return save full file path.
     */
    public static String getDropBoxLogToFile(String tag, long time) {
        //Android.permission.read'logs permission needs to be added to Android manifest.
        DropBoxManager dropBoxManager = (DropBoxManager) MyApplication.getAppContext()
            .getSystemService(Context.DROPBOX_SERVICE);
        DropBoxManager.Entry entry;

        File dirFile = new File(SAVE_LOG_DIR_PATH);
        if (!dirFile.exists()) {
            dirFile.mkdirs();
        }
        String fullLogPath = SAVE_LOG_DIR_PATH + tag + "@" + time + ".txt";
        LogUtil.d(TAG + "getDropBoxLogToFile() * tag:" + tag + " time:" + time
            + " fullLogPath:" + fullLogPath);
        BufferedWriter bufferedWriter = null;
        try {
            bufferedWriter = new BufferedWriter(new OutputStreamWriter(
                new FileOutputStream(fullLogPath), "UTF-8"));
            if ((entry = dropBoxManager.getNextEntry(tag, time - 1)) != null) {
                BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(
                    entry.getInputStream()));
                String str = null;
                while ((str = bufferedReader.readLine()) != null) {
                    //Start reading the log, one line at a time.
                    if (DEBUG) {
                        LogUtil.d(TAG + "getRetrieveLogToFile() str:" + str);
                    }
                    bufferedWriter.write(str + "
");
                }

            }
            if (null != entry) {
                entry.close();
            }
        } catch (IOException e1) {
            LogUtil.d(TAG + "getDropBoxLogToFile() error:" + e1);
            e1.printStackTrace();
        } catch (Exception e) {
            LogUtil.d(TAG + "getDropBoxLogToFile() error:" + e);
            e.printStackTrace();
        } finally {
            if (null != bufferedWriter) {
                try {
                    bufferedWriter.close();
                    bufferedWriter = null;
                } catch (IOException e) {
                    LogUtil.e(TAG + "getDropBoxLogToFile() error:" + e);
                }
            }
        }
        return fullLogPath;
    }
}