一、判断当前网络环境
/**
* 判断当前网络环境是WiFi还是移动数据
*
* @param activity 要调用方法的Activity
* @return 网络类型,1为WiFi、2为移动数据、3为其它
*/
public static int checkNetType(Activity activity) {
//判断是连接的内网还是外网主要用到ConnectivityManager
ConnectivityManager cm = (ConnectivityManager) activity.getSystemService(Context.CONNECTIVITY_SERVICE);
boolean isWifiNet = false;
boolean isGprsNet = false;
try {
isWifiNet = cm.getNetworkInfo(ConnectivityManager.TYPE_WIFI).getState() == NetworkInfo.State.CONNECTED ? true : false;
} catch (Exception e) {
e.printStackTrace();
}
try {
isGprsNet = cm.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).getState() == NetworkInfo.State.CONNECTED ? true : false;
} catch (Exception e) {
e.printStackTrace();
}
if (isWifiNet) {//连接的WiFi
return 1;
} else if (isGprsNet) {//连接的数据网络
return 2;
} else {
return 3;
}
}
二、隐藏软键盘
/**
* 隐藏软键盘
*
* @param activity 当前界面
* @param editText 当前输入框
* @return true未隐藏 false隐藏
*/
public static boolean hideSoftInput(Activity activity, EditText editText) {
InputMethodManager imm = (InputMethodManager) activity.getSystemService(Context.INPUT_METHOD_SERVICE);
if (imm != null) {
return imm.hideSoftInputFromWindow(editText.getWindowToken(), 0);
}
return false;
}
三、动态监测及获取权限
/**
* 检测并获取权限
*
* @param activity Activity
* @param permission 权限名称,如Manifest.permission.READ_EXTERNAL_STORAGE
* @param requestCode 请求码
*/
public static void checkPermission(Activity activity, String permission, int requestCode) {
if (Build.VERSION.SDK_INT >= 23) {//如果系统是6.0及以上则去申请
int checkPermission = ContextCompat.checkSelfPermission(activity, permission);
//检测是否已经申请
if (checkPermission != PackageManager.PERMISSION_GRANTED) {
//动态申请权限
ActivityCompat.requestPermissions(activity, new String[]{permission}, requestCode);
}
}
}
四、Bitmap转为Base64
/**
* Bitmap转为Base64
*
* @param bitmap
* @return
*/
public static String bitmapToBase64(Bitmap bitmap) {
String result = null;
ByteArrayOutputStream baos = null;
try {
if (bitmap != null) {
baos = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos);
baos.flush();
baos.close();
byte[] bitmapBytes = baos.toByteArray();
result = Base64.encodeToString(bitmapBytes, Base64.DEFAULT);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (baos != null) {
baos.flush();
baos.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return result;
}
五、Base64转为Bitmap
/**
* Base64转为Bitmap
*
* @param base64Data
* @return
*/
public static Bitmap base64ToBitmap(String base64Data) {
byte[] bytes = Base64.decode(base64Data, Base64.DEFAULT);
return BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
}
六、SHA1算法
/**
* SHA1算法
*
* @param data
* @return
* @throws NoSuchAlgorithmException
*/
public static String sha1(String data) throws NoSuchAlgorithmException {
MessageDigest md = MessageDigest.getInstance("SHA1");
md.update(data.getBytes());
StringBuffer buf = new StringBuffer();
byte[] bits = md.digest();
for (int i = 0; i < bits.length; i++) {
int a = bits[i];
if (a < 0) a += 256;
if (a < 16) buf.append("0");
buf.append(Integer.toHexString(a));
}
return buf.toString();
}