Android, Detect when other apps are launched

Question

I\'m trying to develop an app that prevents a user from getting to a specified app without a password. The scenario is...

1. user clicks on \"Email\" app (for exa

Answer 1

I think we can use logcat and analyze it's output.

In all similar programs I have found this permission :

android.permission.READ_LOGS

It means all of them use it but it seems the program starts and after that our program (app protector) will start and bring front.

Use below code :

try
    {
        Process mLogcatProc = null;
        BufferedReader reader = null;
        mLogcatProc = Runtime.getRuntime().exec(new String[]{"logcat", "-d"});

        reader = new BufferedReader(new InputStreamReader(mLogcatProc.getInputStream()));

        String line;
        final StringBuilder log = new StringBuilder();
        String separator = System.getProperty("line.separator"); 

        while ((line = reader.readLine()) != null)
        {
            log.append(line);
            log.append(separator);
        }
        String w = log.toString();
        Toast.makeText(getApplicationContext(),w, Toast.LENGTH_LONG).show();
    }
    catch (Exception e) 
    {
        Toast.makeText(getApplicationContext(), e.getMessage(), Toast.LENGTH_LONG).show();
    }

And do not forget to add it's permission in Manifest file.