Android之常用功能代码

透明导航栏

if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);//透明状态栏
getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);//透明导航栏
}

Toast的用法

Toast.makeText(MainActivityRegister.this, "这是一个Toast", Toast.LENGTH_SHORT).show();

检测邮箱格式类

public class CheckEmailFormat {
    public boolean isValidEmail(String mail) {
        Pattern pattern = Pattern.compile("^[A-Za-z0-9][\w\._]*[a-zA-Z0-9]+@[A-Za-z0-9-_]+\.([A-Za-z]{2,4})");
        Matcher mc = pattern.matcher(mail);
        return mc.matches();
    }
}

获取时间类(若要获取十二小时制的时间，只要把HH改成hh即可)

public class GetTime {
    public String time(){
        SimpleDateFormat sDateFormat=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        return sDateFormat.format(new java.util.Date());
    }
}

检测网络是否连通类

public class InternetStatus {
    //用于判断网络连接是否可用
    public boolean isNetworkEnable(Context temp_context) {
        ConnectivityManager cm = (ConnectivityManager) temp_context.getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo info=cm.getActiveNetworkInfo();
        if(info!=null&&info.isAvailable()) {
            return true;//网络连接可用
        }
        else {
            return false;//网络连接不可用
        }
    }
}

文本框点击后获取焦点

public class EditTextFocus {
    public void setFocus(EditText edit_text){
        edit_text.setFocusable(true);
        edit_text.setFocusableInTouchMode(true);
        edit_text.requestFocus();
    }
}

键盘相关

//强制显示键盘
public void showKeyboard(EditText temp_edit_text){
    InputMethodManager imm=(InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);
    imm.showSoftInput(temp_edit_text, InputMethodManager.SHOW_FORCED);
}
//强制隐藏键盘
public void hideKeyboard(Button temp_button){
    InputMethodManager imm = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);
    imm.hideSoftInputFromWindow(temp_button.getWindowToken(), 0);
}