Android系统工具类详解

public class systemUtil {  //隐藏ipad底部虚拟按键栏  @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);  }  //不自动弹出软键盘  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);  }  //获取屏幕分辨率  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;  }  //获取Android系统版本  public static String getSystemVersion() {    return android.os.Build.VERSION.RELEASE;  }  //获取设备机型  public static String getSystemModel() {    return android.os.Build.MODEL;  }  //获取IMEI识别号  //所需权限 <uses-permission android:name="android.permission.READ_PHONE_STATE" />  @SuppressLint("MissingPermission")  public static String getIMEI(Activity activity) {    //6.0以上的系统动态添加权限    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();  }  //获取系统当前语言  public static String getSystemLanguage() {    return Locale.getDefault().getLanguage();  }  //获取设备电量  @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);  }  //获取设备内存可用大小(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);  }  //获取设备内存可用的总量大小(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);  }  //获得SD卡可用总量大小  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);  }  //获得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);   }  //重启设备  private void restartDevices() {    String cmd = "su -c reboot";    try {      Runtime.getRuntime().exec(cmd);    } catch (IOException e) {      Log.i("restart","权限不足");    }  }}

//写入外部存储android.permission.WRITE_EXTERNAL_STORAGE，允许写入外部存储//读取外部存储android.permission.READ_EXTERNAL_STORAGE，允许读取外部存储//读取系统日志android.permission.READ_LOGS，读取系统底层日志//读取短信内容android.permission.READ_SMS，读取短信内容//振动android.permission.VIBRATE，允许振动//重启设备android.permission.REBOOT，允许程序重新启动设备//安装应用程序android.permission.INSTALL_PACKAGES，允许程序安装应用//修改声音android.permission.MODIFY_AUDIO_SETTINGS，修改声音设置信息//录音android.permission.RECORD_AUDIO，录制声音通过手机或耳机的麦克//使用闪光灯android.permission.FLASHLIGHT，允许访问闪光灯//访问网络android.permission.INTERNET，访问网络连接，可能产生GPRS流量//改变wifi状态android.permission.CHANGE_WIFI_STATE，打开wifi，改变wifi状态//获取WiFi状态android.permission.ACCESS_WIFI_STATE，获取当前WiFi接入的状态以及WLAN热点的信息//获取网络状态android.permission.ACCESS_NETWORK_STATE，获取网络信息状态，如当前的网络连接是否有效//拍照权限android.permission.CAMERA，允许访问摄像头进行拍照//使用蓝牙android.permission.BLUETOOTH，允许程序连接配对过的蓝牙设备//电池状态android.permission.BATTERY_STATS，允许应用程序获取电池状态的权限