Added option in SettingsFragment to allow users to send the logs as a file via email

app/src/main/java/fr/free/nrw/commons/Utils.java

@@ -13,8 +13,10 @@ import org.xmlpull.v1.XmlPullParser;
 import org.xmlpull.v1.XmlPullParserException;
 
 import java.io.BufferedInputStream;
+import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStream;
+import java.io.InputStreamReader;
 import java.io.StringWriter;
 import java.io.UnsupportedEncodingException;
 import java.math.BigInteger;
@@ -281,4 +283,37 @@ public class Utils {
     public static boolean isDarkTheme(Context context) {
         return PreferenceManager.getDefaultSharedPreferences(context).getBoolean("theme", false);
     }
+
+    /**
+     * Will be used to fetch the logs generated by the app ever since the beginning of times....
+     * i.e. since the time the app started.
+     *
+     * @return String containing all the logs since the time the app started
+     */
+    public static String getAppLogs() {
+        final String processId = Integer.toString(android.os.Process.myPid());
+
+        StringBuilder stringBuilder = new StringBuilder();
+
+        try {
+            String[] command = new String[] {"logcat","-d","-v","threadtime"};
+
+            Process process = Runtime.getRuntime().exec(command);
+
+            BufferedReader bufferedReader = new BufferedReader(
+                    new InputStreamReader(process.getInputStream())
+            );
+
+            String line;
+            while ((line = bufferedReader.readLine()) != null) {
+                if (line.contains(processId)) {
+                    stringBuilder.append(line);
+                }
+            }
+        } catch (IOException ioe) {
+            Timber.e("getAppLogs failed", ioe);
+        }
+
+        return stringBuilder.toString();
+    }
 }