Android，检测何时启动其他应用

#1 楼

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();
    }

#2 楼

ActivityManager am = (ActivityManager)getSystemService(Context.ACTIVITY_SERVICE);
List<ActivityManager.RunningAppProcessInfo> runningAppProcessInfo = am.getRunningAppProcesses();

#3 楼

#4 楼

class CheckRunningActivity extends Thread{
    ActivityManager am = null;
    Context context = null;

    public CheckRunningActivity(Context con){
        context = con;
        am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
    }

    public void run(){
        Looper.prepare();

        while(true){
            // Return a list of the tasks that are currently running,
            // with the most recent being first and older ones after in order.
            // Taken 1 inside getRunningTasks method means want to take only
            // top activity from stack and forgot the olders.
            List< ActivityManager.RunningTaskInfo > taskInfo = am.getRunningTasks(1);

            String currentRunningActivityName = taskInfo.get(0).topActivity.getClassName();

            if (currentRunningActivityName.equals("PACKAGE_NAME.ACTIVITY_NAME")) {
                // show your activity here on top of PACKAGE_NAME.ACTIVITY_NAME
            }
        }
        Looper.loop();
    }
}

new CheckRunningActivity().start();

<uses-permission android:name="android.permission.GET_TASKS" />

#5 楼

#6 楼

#7 楼