Develop Reference

I can't read log from CallNotifier and PhoneUtils

i try read the log generated from "CallNotifier" and "PhoneUtils" but i can't,
i use two ways for this: both are thread (AsyncTask)
1:
try {
Process process = Runtime.getRuntime().exec("logcat");
BufferedReader bufferedReader = new BufferedReader(
new InputStreamReader(process.getInputStream()));
String line = "";
while ((line = bufferedReader.readLine()) != null) {
if (line.contains("CallNotifier")) {
publishProgress(line);
}
}
}
catch (IOException e) {
}
on this way i read all catlog but i filter if the line contains "CallNotifier"
2:
try {
Process process = Runtime.getRuntime().exec("logcat -s CallNotifier");
BufferedReader bufferedReader = new BufferedReader(
new InputStreamReader(process.getInputStream()));
String line = "";
while ((line = bufferedReader.readLine()) != null) {
publishProgress(line);
}
}
catch (IOException e) {
}
This way i filter in
exec("logcat -s CallNotifier");
Don't work
When I filter tag generated from my app the code works. if i filter from PC in terminal i can see log from CallNotifier the problem its when i filter from Android.

android clear log programmatically

I want to get the whole log (Log.d(...)), after pressing a button to analyse some parts of our app (count something...). I'm able to do this by the following code:
HashMap<String, Integer> hashMapToSaveStuff = new HashMap<String, Integer>();
int count= 0;
String toCount= "";
try {
Process process = Runtime.getRuntime().exec("logcat -d");
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(process.getInputStream()));
String line;
while ((line = bufferedReader.readLine()) != null) {
if (line.contains("MYSTRING")) {
toCount = line.substring(line.indexOf(":") + 1);
if (hashMapToSaveStuff.containsKey(toCount)) {
count = hashMapToSaveStuff.get(toCount);
count++;
} else {
count= 1;
}
hashMapToSaveStuff.put(toCount, count);
}
}
} catch (Exception e) {
}
After that I'll send the result to our server and save it on database. Because of that I want to clear all the logs, I've already send. Trying to do this with the following code didn't work:
try {
Process process = Runtime.getRuntime().exec("logcat -c");
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(process.getInputStream()), 1024);
String line = bufferedReader.readLine();
} catch (Exception e) {
}
How can I clear the log?

This code has worked for me in the past:
Process process = new ProcessBuilder()
.command("logcat", "-c")
.redirectErrorStream(true)
.start();

Filter Logs in Android programmatically

This is method to fetch and dump logs in SDCard for Android. This is working fine, but I am wondering if we can put filter to trace logs related to specific tags.
I tried logcat -s *TagIWant; but it didn't work. Any other suggestion?
public static void Log(Context context){
String filename = context.getExternalFilesDir(null).getPath() + File.separator + "my_app.log";
String command = "logcat -d *:V";
Log.d(TAG, "command: " + command);
try{
Process process = Runtime.getRuntime().exec(command);
BufferedReader in = new BufferedReader(new InputStreamReader(process.getInputStream()));
String line = null;
try{
File file = new File(filename);
file.createNewFile();
FileWriter writer = new FileWriter(file);
while((line = in.readLine()) != null){
writer.write(line + "\n");
}
writer.flush();
writer.close();
}
catch(IOException e){
e.printStackTrace();
}
}
catch(IOException e){
e.printStackTrace();
}
}

try {
Process process = Runtime.getRuntime().exec("logcat -d");
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(process.getInputStream()));
String line;
Pattern pattern = Pattern.compile("XXX", 0);
while ((line = bufferedReader.readLine()) != null) {
if (patternu != null
&& !pattern.matcher(line).find()) {
continue;
}
log.append(line);
log.append('\n');
}
} catch (IOException e) {
}

Replace "Your_Tag" with your tag, that will give you the logs with tag as specified in with priority "Debug" and Above.
String command = "logcat Your_Tag:D *:S";
Process process = Runtime.getRuntime().exec(command);
Check more on http://developer.android.com/tools/debugging/debugging-log.html

You can easily filter the line that you want to write like the code below:
while ((line = bufferedReader.readLine()) != null) {
if(line.contains("The String you want to exist in your log")){
writer.write(line + "\n");
}
else{continue;}
}

Save app event (logcat) in file on sd

I want to save my app logcat events in a text file on sd card.
my alarming app work properly in my and my friends devices, but other have error on my app.
for example they say alarms in app are in wrong time, but i dont see this error in my and my friends devices.
Because of this issue and other issues, i want save all events logcat related my app, atomatically. so they send log file to me to solve issues.
how can i do this?
thanks
sorry for my bad english

You can get logcat via the following:
static final int BUFFER_SIZE = 1024;
public String getLogCat() {
String[] logcatArgs = new String[] {"logcat", "-v", "time"};
Process logcatProc = null;
try {
logcatProc = Runtime.getRuntime().exec(logcatArgs);
}
catch (IOException e) {
return null;
}
BufferedReader reader = null;
String response = null;
try {
String separator = System.getProperty("line.separator");
StringBuilder sb = new StringBuilder();
reader = new BufferedReader(new InputStreamReader(logcatProc.getInputStream()), BUFFER_SIZE);
String line;
while ((line = reader.readLine()) != null) {
sb.append(line);
sb.append(separator);
}
response = sb.toString();
}
catch (IOException e) {
}
finally {
if (reader != null) {
try {
reader.close();
}
catch (IOException e) {}
}
}
return response;
}
You can then save this String to the sdcard.

You can get logcat via the following:
static final int BUFFER_SIZE = 1024;
public String getLogCat() {
String[] logcatArgs = new String[] {"logcat", "-v", "time"};
Process logcatProc = null;
try {
logcatProc = Runtime.getRuntime().exec(logcatArgs);
}
catch (IOException e) {
return null;
}
BufferedReader reader = null;
String response = null;
try {
String separator = System.getProperty("line.separator");
StringBuilder sb = new StringBuilder();
reader = new BufferedReader(new InputStreamReader(logcatProc.getInputStream()), BUFFER_SIZE);
String line;
while ((line = reader.readLine()) != null) {
sb.append(line);
sb.append(separator);
}
response = sb.toString();
}
catch (IOException e) {
}
finally {
if (reader != null) {
try {
reader.close();
}
catch (IOException e) {}
}
}
return response;
}
You can then save this String to the sdcard.
This answer from "Dororo" didn't work for me since it always got stuck in the while due to to many lines, but i have no idea how to fix that.

the logcat will block for reading new logs unless you specify the '-d' arg.
try
String[] logcatArgs = new String[] {"logcat", "-d", "-v", "time"};

This type of functionality is already implemented by the ACRA Android library. The library detects crashes, and send the crash information to either a Google Docs spreadsheet, or your own destination.

Execute within a thread to avoid ANRs

Wi-Fi tethering - how to get list of connected clients

Is there any way to get a the list of connected MAC addresses when my phone is on Wi-Fi tethering mode?

Firstly, you must have a rooted device. When it's done just read dnsmasq.leases file. Usually it is placed at: /data/misc/dhcp/dnsmasq.leases.
A structure of the file is pretty simple - each line is a summary of a connected user. The summary has several fields including MAC.
I didn't find a possibility to get MAC without root. Please correct me if I'm wrong.

Reading /proc/net/arp would provide the information for both static and DHCP clients that have communicated with the device during the last 60 seconds (configured in /proc/sys/net/ipv4/neigh/wl0.1/gc_stale_time where wl0.1 is the wireless network interface on my phone).
It is available for non-root users too.

#SuppressWarnings("ConstantConditions")
public static String getClientMacByIP(String ip)
{
String res = "";
if (ip == null)
return res;
String flushCmd = "sh ip -s -s neigh flush all";
Runtime runtime = Runtime.getRuntime();
try
{
runtime.exec(flushCmd,null,new File("/proc/net"));
}
BufferedReader br;
try
{
br = new BufferedReader(new FileReader("/proc/net/arp"));
String line;
while ((line = br.readLine()) != null)
{
String[] sp = line.split(" +");
if (sp.length >= 4 && ip.equals(sp[0]))
{Assistance.Log(sp[0]+sp[2]+sp[3],ALERT_STATES.ALERT_STATE_LOG);
String mac = sp[3];
if (mac.matches("..:..:..:..:..:..") && sp[2].equals("0x2"))
{
res = mac;
break;
}
}
}
br.close();
}
catch (Exception e)
{}
return res;
}
//--------------------------------------------------------
#SuppressWarnings("ConstantConditions")
public static String getClientIPByMac(String mac)
{
String res = "";
if (mac == null)
return res;
String flushCmd = "sh ip -s -s neigh flush all";
Runtime runtime = Runtime.getRuntime();
try
{
runtime.exec(flushCmd,null,new File("/proc/net"));
}
BufferedReader br;
try
{
br = new BufferedReader(new FileReader("/proc/net/arp"));
String line;
while ((line = br.readLine()) != null)
{
String[] sp = line.split(" +");
if (sp.length >= 4 && mac.equals(sp[3]))
{
String ip = sp[0];
if (ip.matches("\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}") && sp[2].equals("0x2"))
{
res = ip;
break;
}
}
}
br.close();
}
catch (Exception e)
{}
return res;
}

public static ArrayList<String> getConnectedDevicesMac()
{
ArrayList<String> res = new ArrayList<String>();
//NetManager.updateArpFile();
BufferedReader br;
try
{
br = new BufferedReader(new FileReader("/proc/net/arp"));
String line;
line = br.readLine();
while ((line = br.readLine()) != null)
{
String[] sp = line.split(" +");
if (sp[3].matches("..:..:..:..:..:.."))
res.add(sp[3]);
}
br.close();
}
catch (Exception e)
{}
return res;
}