Catch ANR globally in Application

Question

i just want to know is there any way to get ANR notifications either through triggering any event functions or atleast catch it .despite running long process in separate thread there are possibities of ANR.so all i want to do is when app detects ANR it has to handle some functions automatically.please assist me how to achieve this.thank you.

Answer 1

you could use a service (preferably a foreground service) that listens to the logs (using a thread) , and if there is a log that indicate the ANR , handle it.

here's a small sample of an app that causes ANR:

...
findViewById(R.id.button).setOnClickListener(new OnClickListener()
  {
    @Override
    public void onClick(final View v)
      {
      try
        {
        Thread.sleep(10000);
        }
      catch(final InterruptedException e)
        {
        // TODO Auto-generated catch block
        e.printStackTrace();
        }
      }
  });
...

here's the log that i got from the logcat when i got the ANR:

08-03 13:02:37.746: E/ActivityManager(158): ANR in com.example.anr (com.example.anr/.MainActivity)
08-03 13:02:37.746: E/ActivityManager(158): Reason: keyDispatchingTimedOut
08-03 13:02:37.746: E/ActivityManager(158): Load: 6.19 / 2.37 / 0.86
08-03 13:02:37.746: E/ActivityManager(158): CPU usage from 5598ms to 0ms ago:
08-03 13:02:37.746: E/ActivityManager(158):   2.6% 158/system_server: 2.5% user + 0.1% kernel / faults: 86 minor
08-03 13:02:37.746: E/ActivityManager(158):   0.5% 298/com.android.phone: 0.3% user + 0.1% kernel / faults: 15 minor
08-03 13:02:37.746: E/ActivityManager(158):   0% 35/rild: 0% user + 0% kernel
08-03 13:02:37.746: E/ActivityManager(158): 4.6% TOTAL: 3.9% user + 0.6% kernel
08-03 13:02:37.746: E/ActivityManager(158): CPU usage from 2029ms to 2654ms later:
08-03 13:02:37.746: E/ActivityManager(158):   11% 158/system_server: 4.8% user + 6.4% kernel / faults: 2 minor
08-03 13:02:37.746: E/ActivityManager(158):     11% 192/InputDispatcher: 4.8% user + 6.4% kernel
08-03 13:02:37.746: E/ActivityManager(158):     1.6% 163/Compiler: 1.6% user + 0% kernel
08-03 13:02:37.746: E/ActivityManager(158):     1.6% 193/InputReader: 0% user + 1.6% kernel
08-03 13:02:37.746: E/ActivityManager(158): 18% TOTAL: 9.3% user + 9.3% kernel

so , yes , i think it's possible.