Android System Events

/*
 * This is a simplified Java Android app that:
 * - Collects CPU, memory, temperature, battery info every 5 minutes
 * - Listens for charger connect/disconnect events
 * - Detects app installs/uninstalls
 * - Uploads data to an HTTP server
 */

// AndroidManifest.xml
// Add the following permissions and declarations
/*
<uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
<uses-permission android:name="android.permission.INTERNET" />

<application>
    <service android:name=".DataCollectorService" android:exported="false" />
    <receiver android:name=".ChargerReceiver" android:exported="true">
        <intent-filter>
            <action android:name="android.intent.action.ACTION_POWER_CONNECTED" />
            <action android:name="android.intent.action.ACTION_POWER_DISCONNECTED" />
        </intent-filter>
    </receiver>
</application>
*/

// MainActivity.java
public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        startService(new Intent(this, DataCollectorService.class));
    }
}

// DataCollectorService.java
public class DataCollectorService extends Service {
    private final Handler handler = new Handler();
    private final Runnable dataCollector = new Runnable() {
        @Override
        public void run() {
            collectAndUploadData();
            handler.postDelayed(this, 5 * 60 * 1000); // Every 5 minutes
        }
    };

    private BroadcastReceiver appChangeReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            String packageName = intent.getData().getSchemeSpecificPart();
            JSONObject eventData = new JSONObject();
            try {
                PackageManager pm = getPackageManager();
                ApplicationInfo appInfo = pm.getApplicationInfo(packageName, 0);
                String appName = pm.getApplicationLabel(appInfo).toString();
                String event = Intent.ACTION_PACKAGE_ADDED.equals(intent.getAction()) ? "app_installed" : "app_removed";

                eventData.put("timestamp", System.currentTimeMillis());
                eventData.put("event", event);
                eventData.put("package", packageName);
                eventData.put("app_name", appName);
                new Thread(() -> uploadToServer(eventData.toString())).start();
            } catch (PackageManager.NameNotFoundException | JSONException e) {
                e.printStackTrace();
            }
        }
    };

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        handler.post(dataCollector);
        registerAppChangeReceiver();
        return START_STICKY;
    }

    private void registerAppChangeReceiver() {
        IntentFilter filter = new IntentFilter();
        filter.addAction(Intent.ACTION_PACKAGE_ADDED);
        filter.addAction(Intent.ACTION_PACKAGE_REMOVED);
        filter.addDataScheme("package");
        registerReceiver(appChangeReceiver, filter);
    }

    private void collectAndUploadData() {
        JSONObject data = new JSONObject();
        try {
            data.put("timestamp", System.currentTimeMillis());
            data.put("cpu_usage", readCpuUsage());
            data.put("memory_free", getFreeMemory());
            data.put("battery_level", getBatteryLevel());
            data.put("battery_temp", getBatteryTemp());

            // Upload to server
            new Thread(() -> uploadToServer(data.toString())).start();
        } catch (JSONException e) {
            e.printStackTrace();
        }
    }

    private float readCpuUsage() {
        try {
            RandomAccessFile reader = new RandomAccessFile("/proc/stat", "r");
            String load = reader.readLine();
            reader.close();
            String[] toks = load.split(" ");
            long idle1 = Long.parseLong(toks[5]);
            long cpu1 = Long.parseLong(toks[2]) + Long.parseLong(toks[3]) + Long.parseLong(toks[4]);
            Thread.sleep(360);
            reader = new RandomAccessFile("/proc/stat", "r");
            load = reader.readLine();
            reader.close();
            toks = load.split(" ");
            long idle2 = Long.parseLong(toks[5]);
            long cpu2 = Long.parseLong(toks[2]) + Long.parseLong(toks[3]) + Long.parseLong(toks[4]);
            return (float)(cpu2 - cpu1) / ((cpu2 + idle2) - (cpu1 + idle1));
        } catch (Exception ex) {
            return -1;
        }
    }

    private long getFreeMemory() {
        ActivityManager activityManager = (ActivityManager) getSystemService(ACTIVITY_SERVICE);
        ActivityManager.MemoryInfo memInfo = new ActivityManager.MemoryInfo();
        activityManager.getMemoryInfo(memInfo);
        return memInfo.availMem;
    }

    private int getBatteryLevel() {
        Intent batteryIntent = registerReceiver(null, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
        int level = batteryIntent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
        int scale = batteryIntent.getIntExtra(BatteryManager.EXTRA_SCALE, -1);
        return (int)((level / (float)scale) * 100);
    }

    private float getBatteryTemp() {
        Intent batteryIntent = registerReceiver(null, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
        return batteryIntent.getIntExtra(BatteryManager.EXTRA_TEMPERATURE, 0) / 10.0f;
    }

    private void uploadToServer(String jsonData) {
        try {
            URL url = new URL("https://your-server.com/upload");
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod("POST");
            conn.setDoOutput(true);
            conn.setRequestProperty("Content-Type", "application/json");
            OutputStream os = conn.getOutputStream();
            os.write(jsonData.getBytes());
            os.flush();
            os.close();
            conn.getResponseCode();
            conn.disconnect();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

// ChargerReceiver.java
public class ChargerReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (Intent.ACTION_POWER_CONNECTED.equals(action)) {
            Log.d("ChargerReceiver", "Charger connected");
        } else if (Intent.ACTION_POWER_DISCONNECTED.equals(action)) {
            Log.d("ChargerReceiver", "Charger disconnected");
        }
    }
}