Android 材质设计导航适配器页脚/页眉(如何添加页脚?)
我有一个问题,我想在我的导航左边放一个页脚 我有一个页眉,这取决于代码,但我不知道如何添加页脚,我尝试了所有东西,但没有任何工作: 我读了这篇文章:,但我的代码是如此不同 谢谢 我将代码放在XML和java中:Android 材质设计导航适配器页脚/页眉(如何添加页脚?),android,navigation-drawer,material-design,Android,Navigation Drawer,Material Design,我有一个问题,我想在我的导航左边放一个页脚 我有一个页眉,这取决于代码,但我不知道如何添加页脚,我尝试了所有东西,但没有任何工作: 我读了这篇文章:,但我的代码是如此不同 谢谢 我将代码放在XML和java中: public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> { private static final int TYPE_HEADER = 0; // Declaring V
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
private static final int TYPE_HEADER = 0; // Declaring Variable to Understand which View is being worked on
// IF the viaew under inflation and population is header or Item
private static final int TYPE_ITEM = 1;
private String mNavTitles[]; // String Array to store the passed titles Value from MainActivity.java
private int mIcons[]; // Int Array to store the passed icons resource value from MainActivity.java
private String name; //String Resource for header View Name
private int profile; //int Resource for header view profile picture
private String email; //String Resource for header view email
Context context;
// Creating a ViewHolder which extends the RecyclerView View Holder
// ViewHolder are used to to store the inflated views in order to recycle them
public static class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
int Holderid;
TextView textView;
ImageView imageView;
ImageView profile;
TextView Name;
TextView email;
Context contxt;
public ViewHolder(View itemView,int ViewType,Context c) { // Creating ViewHolder Constructor with View and viewType As a parameter
super(itemView);
contxt = c;
itemView.setClickable(true);
itemView.setOnClickListener(this);
// Here we set the appropriate view in accordance with the the view type as passed when the holder object is created
if(ViewType == TYPE_ITEM) {
textView = (TextView) itemView.findViewById(R.id.rowText); // Creating TextView object with the id of textView from item_row.xml
imageView = (ImageView) itemView.findViewById(R.id.rowIcon);// Creating ImageView object with the id of ImageView from item_row.xml
Holderid = 1; // setting holder id as 1 as the object being populated are of type item row
}
else{
Name = (TextView) itemView.findViewById(R.id.name); // Creating Text View object from header.xml for name
email = (TextView) itemView.findViewById(R.id.email); // Creating Text View object from header.xml for email
profile = (ImageView) itemView.findViewById(R.id.circleView);// Creating Image view object from header.xml for profile pic
Holderid = 0; // Setting holder id = 0 as the object being populated are of type header view
}
}
@Override
public void onClick(View v) {
Toast.makeText(contxt,"The Item Clicked is: "+getPosition(),Toast.LENGTH_SHORT).show();
}
}
MyAdapter(String Titles[], int Icons[], String Name, String Email, int Profile, Context passedContext){ // MyAdapter Constructor with titles and icons parameter
// titles, icons, name, email, profile pic are passed from the main activity as we
mNavTitles = Titles; //have seen earlier
mIcons = Icons;
name = Name;
email = Email;
profile = Profile; //here we assign those passed values to the values we declared here
this.context = passedContext;
//in adapter
}
//Below first we ovverride the method onCreateViewHolder which is called when the ViewHolder is
//Created, In this method we inflate the item_row.xml layout if the viewType is Type_ITEM or else we inflate header.xml
// if the viewType is TYPE_HEADER
// and pass it to the view holder
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
if (viewType == TYPE_ITEM) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_row,parent,false); //Inflating the layout
ViewHolder vhItem = new ViewHolder(v,viewType,context); //Creating ViewHolder and passing the object of type view
return vhItem; // Returning the created object
//inflate your layout and pass it to view holder
} else if (viewType == TYPE_HEADER) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.header,parent,false); //Inflating the layout
ViewHolder vhHeader = new ViewHolder(v,viewType,context); //Creating ViewHolder and passing the object of type view
return vhHeader; //returning the object created
}
return null;
}
//Next we override a method which is called when the item in a row is needed to be displayed, here the int position
// Tells us item at which position is being constructed to be displayed and the holder id of the holder object tell us
// which view type is being created 1 for item row
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
if(holder.Holderid ==1) { // as the list view is going to be called after the header view so we decrement the
// position by 1 and pass it to the holder while setting the text and image
holder.textView.setText(mNavTitles[position - 1]); // Setting the Text with the array of our Titles
holder.imageView.setImageResource(mIcons[position -1]);// Settimg the image with array of our icons
}
else{
holder.profile.setImageResource(profile); // Similarly we set the resources for header view
holder.Name.setText(name);
holder.email.setText(email);
}
}
// This method returns the number of items present in the list
@Override
public int getItemCount() {
return mNavTitles.length+1; // the number of items in the list will be +1 the titles including the header view.
}
// Witht the following method we check what type of view is being passed
@Override
public int getItemViewType(int position) {
if (isPositionHeader(position))
return TYPE_HEADER;
return TYPE_ITEM;
}
private boolean isPositionHeader(int position) {
return position == 0;
}
}
但我不知道如何添加页脚
您可以对HeaderView
执行相同的操作。将页脚视为RecyclerView的项目之一:
您的getItemCount
将返回
@Override
public int getItemCount() {
return mNavTitles.length+2;
}
您将有一个方法调用isPositionFooter
private boolean isPositionHeader(int position) {
return position == getItemCount() - 1;
}
您将相应地更改getItemViewType
,以返回页脚类型:
@Override
public int getItemViewType(int position) {
if (isPositionHeader(position)) {
return TYPE_HEADER;
} else if (isPositionFooter(position)) {
return TYPE_FOOTER;
}
return TYPE_ITEM;
}
你好@BlackBelt,isPositionFooter我如何声明?在适配器中复制/通过它?我如何调整到底部页脚?我只有3个字母,页脚是“top”
private boolean isPositionHeader(int position) {
return position == getItemCount() - 1;
}
@Override
public int getItemViewType(int position) {
if (isPositionHeader(position)) {
return TYPE_HEADER;
} else if (isPositionFooter(position)) {
return TYPE_FOOTER;
}
return TYPE_ITEM;
}