Read the system log on Android 4.1
<p>Now , I want to read the system log on android 4.1 . But just can  only get the application itself log . My code as following:</p>

<pre><code>Process logcatProc = Runtime.getRuntime().exec(new String[] { "logcat","ActivityManager:V","*:S" });
reader = new BufferedReader(new InputStreamReader(logcatProc.getInputStream()));  
String line;
while ((line = reader.readLine()) != null) {
    Log.e("log",line);
} 
</code></pre>

<p>it Seems can work on android 4.0 or previous version. anybody have tried this ? Or i need the root permission ?</p>
