我是Android新手，但我想在我的应用程序中制作导航菜单。我成功从Web服务获取数据。但我在导航菜单中有问题如何在导航菜单中添加Web服务菜单项？ 在这个活动中首先通过Web服务获取数据然后将json对象转换为数组对象然后调用printmenu函数在导航中添加菜单项我在本节中有问题我不知道如何添加菜单。
public class MainActivity extends AppCompatActivity
{
private ArrayList<MenuItems> menuModel=new ArrayList<>();
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public class MenuList extends AsyncTask<String,Void,Void>
{
Boolean result = true;
URL url;
HttpURLConnection urlConnection = null;
String[] response;
ProgressDialog dialog;
@Override
protected void onPreExecute() {
super.onPreExecute();
dialog=new ProgressDialog(MainActivity.this);
}
@Override
protected Void doInBackground(String... params)
{
try{
response = new String[params.length];
for(int i=0;i<params.length;i++)
{
url = new URL(params[i]);
urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod("POST");
urlConnection.connect();
int responseCode = urlConnection.getResponseCode();
if(responseCode== HttpURLConnection.HTTP_OK)
{
InputStream in = urlConnection.getInputStream();
response[i] = convertStreamToString(in);
Log.d("Passs", response[i]+"");
}
}
}
catch (Exception e)
{
Log.e("Error",e.getMessage());
result = false;
}
return null;
}
@Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
if(result)
{
allMenuItems(response[0]);
//printCategory(response[0]);
}
else {
Toast.makeText(MainActivity.this,"Somthing bad happen ",Toast.LENGTH_LONG).show();
}
}
}
private void allMenuItems(String response)
{
try
{
JSONObject jsonObject = new JSONObject(response);
JSONArray jsonArray = jsonObject.getJSONArray("menu");
for(int i=0;i<jsonArray.length();i++)
{
JSONObject objMenu=jsonArray.getJSONObject(i);
MenuItems objectmenu=new MenuItems();
objectmenu.setMenu_id(objMenu.getString("category_id"));
objectmenu.setMenuitem_item(objMenu.getString("category_name"));
objectmenu.setMenu_image(objMenu.getString("category_banner"));
menuModel.add(objectmenu);
}
printMenu();
}
catch (Exception e)
{
e.getMessage();
}
}
private void printMenu()
{
for(int i=0;i<=menuModel.size();i++)
{
}
}
}
XML File
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:clickable="true">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:id="@+id/linear_layout_menu"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:paddingTop="10dp"
android:textSize="20dp"
android:text="Category"
android:textStyle="bold"
android:textColorHint="@color/gry"
android:textColor="@color/gray"
android:layout_centerVertical="true"
android:layout_gravity="center_horizontal"
android:layout_toEndOf="@+id/image_view"
android:layout_toRightOf="@+id/image_view"
android:gravity="center_vertical"
android:paddingLeft="10dp"/>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:paddingTop="10dp"
android:paddingLeft="10dp"
android:id="@+id/image_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src = "@drawable/love"
/>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:paddingTop="10dp"
android:textSize="19dp"
android:text="Ring"
android:textStyle="normal"
android:textColor="@color/lightgray"
android:layout_centerVertical="true"
android:layout_gravity="center_horizontal"
android:layout_toEndOf="@+id/image_view"
android:layout_toRightOf="@+id/image_view"
android:gravity="center_vertical"
android:paddingLeft="10dp"/>
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:paddingTop="10dp"
android:paddingLeft="10dp"
android:id="@+id/imageView52"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src = "@drawable/bracelt"/>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:paddingTop="10dp"
android:textSize="19dp"
android:text="Bracelet"
android:textStyle="normal"
android:textColor="@color/lightgray"
android:layout_centerVertical="true"
android:layout_gravity="center_horizontal"
android:layout_toEndOf="@+id/imageView52"
android:layout_toRightOf="@+id/imageView52"
android:gravity="center_vertical"
android:paddingLeft="10dp"/>
</RelativeLayout>
</LinearLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginTop="25dp"
android:background="@color/lightgray"/>
<ImageView
android:layout_marginTop="30dp"
android:paddingTop="10dp"
android:paddingLeft="6dp"
android:id="@+id/imageView57"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src = "@drawable/ratenew"/>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:paddingTop="35dp"
android:textSize="16dp"
android:textStyle="normal"
android:text="Rate Us"
android:textColor="@color/lightgray"
android:layout_centerVertical="true"
android:layout_gravity="center_horizontal"
android:layout_toEndOf="@+id/imageView57"
android:layout_toRightOf="@+id/imageView57"
android:gravity="center_vertical"
android:paddingLeft="10dp"/></RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:paddingTop="10dp"
android:paddingLeft="6dp"
android:id="@+id/imageView58"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src = "@drawable/gestures"/>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:paddingTop="10dp"
android:textSize="16dp"
android:textStyle="normal"
android:paddingLeft="10dp"
android:text="Today's Deal"
android:textColor="@color/lightgray"
android:layout_centerVertical="true"
android:layout_gravity="center_horizontal"
android:layout_toEndOf="@+id/imageView58"
android:layout_toRightOf="@+id/imageView58"
android:gravity="center_vertical"
/>
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:paddingTop="10dp"
android:paddingLeft="6dp"
android:id="@+id/imageView59"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src = "@drawable/contect"/>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:paddingTop="10dp"
android:textSize="16dp"
android:paddingLeft="10dp"
android:textStyle="normal"
android:text="Contact Us"
android:textColor="@color/lightgray"
android:layout_centerVertical="true"
android:layout_gravity="center_horizontal"
android:layout_toEndOf="@+id/imageView59"
android:layout_toRightOf="@+id/imageView59"
android:gravity="center_vertical"
/>
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:paddingTop="10dp"
android:id="@+id/imageView60"
android:paddingLeft="6dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src = "@drawable/about"/>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:paddingTop="10dp"
android:textSize="16dp"
android:paddingLeft="10dp"
android:textStyle="normal"
android:text="About Us"
android:textColor="@color/lightgray"
android:layout_centerVertical="true"
android:layout_gravity="center_horizontal"
android:layout_toEndOf="@+id/imageView60"
android:layout_toRightOf="@+id/imageView60"
android:gravity="center_vertical"
/>
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center">
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginTop="20dp"
android:background="@color/lightgray"/>
<ImageView
android:paddingTop="5dp"
android:paddingLeft="90dp"
android:paddingRight="0dp"
android:layout_marginTop="30dp"
android:paddingBottom="7dp"
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/fb" />
<ImageView
android:paddingTop="13dp"
android:paddingLeft="5dp"
android:layout_marginTop="20dp"
android:paddingBottom="7dp"
android:id="@+id/imageView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src = "@drawable/inst"
android:layout_toEndOf="@+id/imageView1"
android:layout_toRightOf="@+id/imageView1"/>
<ImageView
android:paddingTop="5dp"
android:paddingLeft="5dp"
android:paddingRight="20dp"
android:paddingBottom="7dp"
android:layout_marginTop="30dp"
android:id="@+id/imageView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src = "@drawable/tw"
android:layout_toEndOf="@+id/imageView2"
android:layout_toRightOf="@+id/imageView2"/>
</RelativeLayout>
</LinearLayout>
</RelativeLayout>
答案 0 :(得分：1)
在onPostExecute的{{1}}中，拨打AsyncTask。那应该再次调用invalidateOptionsMenu()方法。在onCreateOptionsMenu中，添加onCreateOptionsMenu中的MenuItem。