Android仿QQ、微信聊天界面长按提示框效果

PromptViewHelper pvHelper = new PromptViewHelper(mActivity);
pvHelper.setPromptViewManager(new ChatPromptViewManager(mActivity));
pvHelper.addPrompt(holder.itemView.findViewById(R.id.textview_content));

public static abstract class PromptViewManager { 

 private View promptView; 
 protected Activity activity; 
 private String[] dataArray; 
 private Location location; 
 public OnItemClickListener onItemClickListener; 

 public PromptViewManager(Activity activity, String[] dataArray, Location location) { 
  this.activity = activity; 
  this.dataArray = dataArray; 
  this.location = location; 
  init(); 
 } 

 public void setOnItemClickListener(OnItemClickListener onItemClickListener) { 
 this.onItemClickListener = onItemClickListener; 
 } 

 public void init() { 
 promptView = inflateView(); 
 bindData(promptView, dataArray); 
 } 

 public abstract View inflateView(); 

 public abstract void bindData(View view, String[] dataArray); 

 public View getPromptView() { 
  return promptView; 
 } 

 public Location getLocation() { 
  return location; 
 }
 }

public enum Location { 

 TOP_LEFT(1), TOP_CENTER(2), TOP_RIGHT(3), 
 BOTTOM_LEFT(4), BOTTOM_CENTER(5), BOTTOM_RIGHT(6); 

 ICalculateLocation calculateLocation; 

 private Location(int type) { 
 switch (type) {  
 case 1:  
 calculateLocation = ICalculateLocation 实现类  
 break;  

 case 2:  
 calculateLocation = ICalculateLocation 实现类   
 break;  

 TODO 
 } 
 }

public interface ICalculateLocation { 
 int[] calculate(int[] srcViewLocation, View srcView, View promptView);
}

public class ChatPromptViewManager extends PromptViewHelper.PromptViewManager { 

 public ChatPromptViewManager(Activity activity, String[] dataArray, 
    Location location) { 
  super(activity, dataArray, location); 
 } 

 public ChatPromptViewManager(Activity activity) { 
  this(activity, new String[]{"复制", "粘贴", "转发"}, Location.TOP_LEFT); 
 } 

 public ChatPromptViewManager(Activity activity, Location location) { 
  this(activity, new String[]{"复制", "粘贴", "转发"}, location); 
 } 

 @Override 
 public View inflateView() { 
  return new PromptView(activity); 
 } 

 @Override 
 public void bindData(View view, String[] dataArray) { 
  if(view instanceof PromptView) {  
   PromptView promptView = (PromptView) view;  
   promptView.setContentArray(dataArray); 
   promptView.setOnItemClickListener(new PromptView.OnItemClickListener() {  

    @Override  
    public void onItemClick(int position) {  
    if(onItemClickListener != null) 
    onItemClickListener.onItemClick(position); 
    }  
   }); 
 } 
 }}

public class TopCenterLocation implements ICalculateLocation { 
 @Override 
 public int[] calculate(int[] srcViewLocation, View srcView, View promptView) { 
  int[] location = new int[2]; 
  int offset = (promptView.getWidth() - srcView.getWidth()) / 2; 
  location[0] = srcViewLocation[0] - offset; 
  location[1] = srcViewLocation[1] - promptView.getHeight(); 
  return location; 
 }}