public class systemUtil {  //隱藏ipad底部虛擬按鍵欄  @RequiresApi(api = Build.VERSION_CODES.KITKAT)  public static void closeBottomBar(Activity activity){    Window _window = activity.getWindow();    WindowManager.LayoutParams params = _window.getAttributes();    params.systemUiVisibility =        View.SYSTEM_UI_FLAG_HIDE_NAVIGATION|View.SYSTEM_UI_FLAG_IMMERSIVE;    _window.setAttributes(params);  }  //不自動彈出軟鍵盤  public static void softInputMode(Activity activity){    activity.getWindow().setSoftInputMode(        WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE |        WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN);  }  //保持屏幕常亮  public static void screenLightUp(Activity activity){    activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);  }  //獲取屏幕分辨率  public static int[] defaultDisplay(Activity activity){    int[] pixels = new int[2];    DisplayMetrics dm = new DisplayMetrics();    activity.getWindowManager().getDefaultDisplay().getMetrics(dm);    pixels[0]=dm.widthPixels;    pixels[1]=dm.heightPixels;    return pixels;  }  //獲取Android系統版本  public static String getSystemVersion() {    return android.os.Build.VERSION.RELEASE;  }  //獲取設備機型  public static String getSystemModel() {    return android.os.Build.MODEL;  }  //獲取IMEI識別號  //所需權限 <uses-permission android:name="android.permission.READ_PHONE_STATE" />  @SuppressLint("MissingPermission")  public static String getIMEI(Activity activity) {    //6.0以上的系統動態添加權限    if (ActivityCompat.checkSelfPermission(activity,        Manifest.permission.READ_PHONE_STATE) != PackageManager.PERMISSION_GRANTED) {      ActivityCompat.requestPermissions(activity,        new String[]{Manifest.permission.READ_PHONE_STATE},1);    }    TelephonyManager tm =        (TelephonyManager) activity.getSystemService(Activity.TELEPHONY_SERVICE);    return tm.getDeviceId();  }  //獲取系統當前語言  public static String getSystemLanguage() {    return Locale.getDefault().getLanguage();  }  //獲取設備電量  @TargetApi(Build.VERSION_CODES.LOLLIPOP)  public static int getBattery(Context context){    BatteryManager batteryManager =        (BatteryManager)context.getSystemService(BATTERY_SERVICE);    return batteryManager.getIntProperty(BatteryManager.BATTERY_PROPERTY_CAPACITY);  }  //獲取設備內存可用大小(GB)  public static String getRomAvailableSize(Context context) {    File path = Environment.getDataDirectory();    StatFs stat = new StatFs(path.getPath());    long blockSize = stat.getBlockSize();    long availableBlocks = stat.getAvailableBlocks();    return Formatter.formatFileSize(context, blockSize * availableBlocks);  }  //獲取設備內存可用的總量大小(GB)  public static String getRomTotalSize(Context context) {    File path = Environment.getDataDirectory();    StatFs stat = new StatFs(path.getPath());    long blockSize = stat.getBlockSize();    long totalBlocks = stat.getBlockCount();    return Formatter.formatFileSize(context, blockSize * totalBlocks);  }  //獲得SD卡可用總量大小  public static String getSDTotalSize(Context context) {    File path = Environment.getExternalStorageDirectory();    StatFs stat = new StatFs(path.getPath());    long blockSize = stat.getBlockSize();    long totalBlocks = stat.getBlockCount();    return Formatter.formatFileSize(context, blockSize * totalBlocks);  }  //獲得sd卡可用大小  private String getSDAvailableSize(Context context) {    File path = Environment.getExternalStorageDirectory();    StatFs stat = new StatFs(path.getPath());    long blockSize = stat.getBlockSize();    long availableBlocks = stat.getAvailableBlocks();    return Formatter.formatFileSize(context, blockSize * availableBlocks);   }  //重啟設備  private void restartDevices() {    String cmd = "su -c reboot";    try {      Runtime.getRuntime().exec(cmd);    } catch (IOException e) {      Log.i("restart","權限不足");    }  }}

//寫入外部存儲android.permission.WRITE_EXTERNAL_STORAGE，允許寫入外部存儲//讀取外部存儲android.permission.READ_EXTERNAL_STORAGE，允許讀取外部存儲//讀取系統日志android.permission.READ_LOGS，讀取系統底層日志//讀取短信內容android.permission.READ_SMS，讀取短信內容//振動android.permission.VIBRATE，允許振動//重啟設備android.permission.REBOOT，允許程序重新啟動設備//安裝應用程序android.permission.INSTALL_PACKAGES，允許程序安裝應用//修改聲音android.permission.MODIFY_AUDIO_SETTINGS，修改聲音設置信息//錄音android.permission.RECORD_AUDIO，錄制聲音通過手機或耳機的麥克//使用閃光燈android.permission.FLASHLIGHT，允許訪問閃光燈//訪問網絡android.permission.INTERNET，訪問網絡連接，可能產生GPRS流量//改變wifi狀態android.permission.CHANGE_WIFI_STATE，打開wifi，改變wifi狀態//獲取WiFi狀態android.permission.ACCESS_WIFI_STATE，獲取當前WiFi接入的狀態以及WLAN熱點的信息//獲取網絡狀態android.permission.ACCESS_NETWORK_STATE，獲取網絡信息狀態，如當前的網絡連接是否有效//拍照權限android.permission.CAMERA，允許訪問攝像頭進行拍照//使用藍牙android.permission.BLUETOOTH，允許程序連接配對過的藍牙設備//電池狀態android.permission.BATTERY_STATS，允許應用程序獲取電池狀態的權限