1、map格式字符串如何解析？

借助json,先將字符串轉(zhuǎn)化為json格式，再取值

JSONObject object = new JSONObject(posMap);

clientIden = object.getString("iden");

----------------------------------------------------------------------------

1、android中新建的項(xiàng)目如何去掉標(biāo)題欄

修改AndroidManifest.xml中的主題：

android:theme="@style/Theme.AppCompat.Light.NoActionBar">

2、有的時候需要隱藏掉EditText的邊框和下劃線

android:background="@null"

3、R包不存在

build---> cleanProject--->buildProject---->到類中重新導(dǎo)入包就可以了

4、Fragment中要用到土司

Toast.makeText(getActivity(), "ddd", Toast.LENGTH_SHORT).show();

5、android開發(fā)中引入依賴包

file--->project Structure---->app----->dependencies------->右上角加號---->library dependency---->搜索添加

-----------------------------------------------------------------------------------------------

1、獲取系統(tǒng)當(dāng)前日期

final Calendar ca = Calendar.getInstance();

mSt_Year = ca.get(Calendar.YEAR);

mSt_Month = ca.get(Calendar.MONTH);

mSt_Day = ca.get(Calendar.DAY_OF_MONTH);

2、日期對話框

DatePickerDialog dpd = new DatePickerDialog(FilterActivity.this, new DatePickerDialog.OnDateSetListener() {

@Override

public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) {

String DateStr = year+"年"+(month+1)+"月"+dayOfMonth+"日";

mTv_date.setText(DateStr);

}

},mSt_Year,mSt_Month,mSt_Day);

dpd.show();