How to Display Long Messages in Logcat

How to display long messages in logcat

If logcat is capping the length at 1000 then you can split the string you want to log with String.subString() and log it in pieces. For example:

int maxLogSize = 1000;
for(int i = 0; i <= veryLongString.length() / maxLogSize; i++) {
    int start = i * maxLogSize;
    int end = (i+1) * maxLogSize;
    end = end > veryLongString.length() ? veryLongString.length() : end;
    Log.v(TAG, veryLongString.substring(start, end));
}

Android how to view long string in logcat

Logcat can only show about 4000 characters. So you need to call a recursive function to see the entire hashmap. Try this function:

public static void longLog(String str) {
    if (str.length() > 4000) {
        Log.d("", str.substring(0, 4000));
        longLog(str.substring(4000));
    } else
        Log.d("", str);
}

How can I see long texts/msg in logcat?

If you want to write long messages to see in logcat it may be worth writing your own wrapper around the android.util.Log methods which splits your long message over multiple lines.

Android - Set max length of logcat messages

There is a fixed size buffer in logcat for binary logs (/dev/log/events) and this limit is 1024 bytes.
For the non-binary logs there is also a limit:

#define LOGGER_ENTRY_MAX_LEN        (4*1024)
#define LOGGER_ENTRY_MAX_PAYLOAD (LOGGER_ENTRY_MAX_LEN - sizeof(struct logger_entry))

So the real message size for both binary and non-binary logs is ~4076 bytes.
The kernel logger interface imposes this LOGGER_ENTRY_MAX_PAYLOAD limit.

The liblog sources (used by logcat) also say:

• The message may have been truncated by the kernel log driver.

I would recommend you the nxlog tool which does not use the logcat binary, but due to the limitations in the kernel I doubt that it will solve your problem. Nevertheless, it might be worth a try. (disclaimer: I'm the author.)

How to Increase Logcat Message length?

You can use DDMS, which is one option..Copy from a DDMS to any text editor..See this

Why does LogCat not show the full message?

Because your logcat has reached its max size, see What is the size limit for Logcat and how to change its capacity?

Try using this code to write your result into a text file in sdcard, then use DDMS to get it.

 public static void appendLog(String text)
{
    File logFile = new File("sdcard/log.txt");
    if (!logFile.exists())
    {
        try
        {
            logFile.createNewFile();
        } catch (IOException e)
        {
            e.printStackTrace();
        }
    }
    try
    {
        // BufferedWriter for performance, true to set append to file flag
        BufferedWriter buf = new BufferedWriter(new FileWriter(logFile, true));
        buf.append(text);
        buf.newLine();
        buf.close();
    } catch (IOException e)
    {
        e.printStackTrace();
    }
}

Is Android Logcat limited to 4096 characters per output call?

Is Android java StringBuilder limit 4096 characters?

No.

Is there some sort of limit I don't know about?

Yes. LogCat will not log arbitrarily-long messages.

Do I have to write out everything line by line in separate calls?

Well, I would log something smaller, or perform other sorts of diagnostics. But, yes, you could split the string into chunks and log those chunks individually.

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