Android user data logger - log data in file and sent it via email or other app easily - works with android 11 as well

LoggerUtils.java

// Note : you must have storage permission before using this utility
//    <uses-permission android:name="android.permission.READ_LOGS"
//       tools:ignore="ProtectedPermissions" />
//    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
//    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />


import android.app.Activity;
import android.content.Context;
import android.content.ContextWrapper;
import android.content.Intent;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.webkit.MimeTypeMap;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.core.content.FileProvider;

import com.MyApp.MyApplication;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URLConnection;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;

public class LoggerUtils {

    private static final String TAG = "LoggerUtils";

    @NonNull
    public static File getStorageDirectory() {
        if (Environment.getExternalStorageState() == null) {

            File f = new File(Environment.getDataDirectory().getAbsolutePath() + "/Download/AppLogs/");

            if(!f.exists())
                f.mkdirs();
            return f;
        } else A
            File f = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/Download/AppLogs/");
            if(!f.exists())
                f.mkdirs();
            return f;
        }
    }

    private static File getLogFile(){
        File baseDir = getStorageDirectory();
        String fileName = "myapp_log";
        return new File(baseDir, fileName + ".txt");
    }

    public static void addLog(String tag, String message){
        try {
            File baseDir = getStorageDirectory();
            String fileName = "myapp_log";
            File logFile = new File(baseDir, fileName + ".txt");
            FileWriter writer;
            if (logFile.exists() && !logFile.isDirectory()) {
                writer = new FileWriter(logFile, true);
            } else {
                writer = new FileWriter(logFile);
            }
            writer.append(DateUtil.getLoggerDate(new Date().getTime()))
                    .append(" ---->> ")
                    .append(tag)
                    .append(" : ")
                    .append(message)
                    .append("\n\n");
            writer.close();
        }catch (Exception e){
            DominosLog.e(TAG, "add logs exception" + (e.getMessage() != null ? e.getMessage() : ""));
        }
        DominosLog.i(tag, message);
    }

    public static void wipeLogs(){
        try {
            File baseDir = getStorageDirectory();
            String fileName = "myapp_log";
            File logFile = new File(baseDir, fileName + ".txt");
            FileWriter writer;
            if (logFile.exists() && !logFile.isDirectory()) {
                writer = new FileWriter(logFile, false);
            } else {
                writer = new FileWriter(logFile);
            }
            writer.write("");
            writer.close();
        }catch (Exception e){
            Toast.makeText(MyApplication.getInstance(), e.toString(), Toast.LENGTH_SHORT).show();
        }
    }

    private static File generateAdbLog() {
        File baseDir = getStorageDirectory();
        String fileName = "app" + new Date().getTime();
        File logFile = new File(baseDir, fileName + ".txt");
        //write log to file
        int pid = android.os.Process.myPid();
        try {
            String command = String.format("logcat -d *:E");
            Process process = Runtime.getRuntime().exec(command);

            BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
            StringBuilder result = new StringBuilder();
            String currentLine = null;

            while ((currentLine = reader.readLine()) != null) {
                if (currentLine != null && currentLine.contains(String.valueOf(pid))) {
                    result.append(currentLine);
                    result.append("\n");
                }
            }

            FileWriter writer;
            if(logFile.exists() && !logFile.isDirectory()) {
                writer = new FileWriter(logFile , true);
            } else {
                writer = new FileWriter(logFile);
            }
            writer.write(result.toString());
            writer.close();
        } catch (IOException e) {
            Toast.makeText(MyApplication.getInstance(), e.toString(), Toast.LENGTH_SHORT).show();
        }


        //clear the log
        try {
            Runtime.getRuntime().exec("logcat -c");
        } catch (IOException e) {
            Toast.makeText(MyApplication.getInstance(), e.toString(), Toast.LENGTH_SHORT).show();
        }

        return logFile;
    }

    public static void generateAndSendLogs(Activity activity) {
        if (activity == null) {
            return;
        }
        File logFile = getLogFile();
        if (logFile == null){
            Util.showCustomToast(activity, "issues in log file", Toast.LENGTH_SHORT);
            return;
        }
        Intent intent = new Intent(Intent.ACTION_SEND);
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        Uri fileUri;
        if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.N){
            fileUri = FileProvider.getUriForFile(activity,
                    MyApplication.getInstance().getPackageName() + ".provider", logFile);
        }else{
            fileUri = Uri.fromFile(logFile);
        }

        String mime= null;
        try {
            mime = URLConnection.guessContentTypeFromStream(new FileInputStream(logFile));
        } catch (IOException e) {
            e.printStackTrace();
        }
        if(mime==null) mime=URLConnection.guessContentTypeFromName(logFile.getName());
        intent.putExtra(Intent.EXTRA_STREAM, fileUri);
        intent.putExtra(Intent.EXTRA_EMAIL, new String[]{"[email protected]"});
        intent.putExtra(Intent.EXTRA_SUBJECT, "App Logs");
        intent.putExtra(Intent.EXTRA_TEXT, "Hi Team, Please app logs attached to this email.");
        intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
        intent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
      //  intent.setType("multipart/");
        intent.setDataAndType(fileUri, mime);
        if (intent.resolveActivity(MyApplication.getInstance().getPackageManager()) != null) {
            activity.startActivity(Intent.createChooser(intent, "Share logs Via"));
        }else{
            Util.showCustomToast(MyApplication.getInstance(), "No Apps is install to send email", Toast.LENGTH_SHORT);
        }
    }


}