Android / System Services

Activity Manager.java

// AndroidManifest.xml must have the following permission:
// <uses-permission android:name="android.permission.GET_TASKS"/>
ActivityManager activityManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);

Alarm Manager.java

AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);

Audio Manager.java

AudioManager audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);

Clipboard Manager.java

ClipboardManager clipboardManager = (ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE);

Connectivity Manager.java

// AndroidManifest.xml must have the following permission:
// <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);

Input Method Manager.java

InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);

SystemProperties.java

try {
        final Class<?> sysProp = Class.forName("android.os.SystemProperties");
        final Method get = sysProp.getMethod("get", new Class<?>[]{String.class});
        final String ret = (String) get.invoke(sysProp, new Object[]{"persist.sys.aabbcc"});
    } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

// adb shell setprop / getprop