正在使用在View-pager中实现FOLLOW按钮的应用程序。
当用户点击FOLLOW按钮后，该按钮应在从服务器获得成功响应后更改为FOLLOWING。
虽然我已经实现了...按钮图像在click.it有一个非常不寻常的行为后不会改变。
有时会在重新加载活动或寻呼机滑动后显示FOLLOWING。 以下是我的代码..
package comend.com.comendify.adapters;
import android.content.Context;
import android.content.Intent;
import android.support.v4.view.PagerAdapter;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;
import com.squareup.picasso.Picasso;
import java.util.ArrayList;
import comend.com.comendify.R;
import comend.com.comendify.activity.ActViewUserProfile;
import comend.com.comendify.models.Home;
import comend.com.comendify.models.Tags;
import comend.com.comendify.models.User;
import comend.com.comendify.serverCommunication.WebServerSetGetUserActivities;
import comend.com.comendify.utility.RoundedImageView;
import comend.com.comendify.utility.UserJSONUtils;
import comend.com.comendify.utility.Utils;
/**
* Created by qamar on 14-03-2016.
*/
public class ImageViewPagerAdapter extends PagerAdapter {
public static final String TAG = ImageViewPagerAdapter.class.getSimpleName();
Context mContext;
LayoutInflater mLayoutInflater;
private ArrayList<String> imageList;
private ArrayList<Home> home_arrayList;
private String loggedInUserId;
private Button btnFollow,btnUnFollow;
int resourceId;
int START_INDEX;
private User userLogged;
private View itemView ;
Boolean val =true;
private boolean isFollowing = true;
boolean isIconChange;
public ImageViewPagerAdapter(Context context, ArrayList<String> imageList, int START_INDEX, int resoursceId, ArrayList<Home> home_arrayList) {
mContext = context;
this.imageList =imageList;
this.home_arrayList = home_arrayList;
this.resourceId = resoursceId;
this.START_INDEX = START_INDEX;
mLayoutInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
loggedInUserId = Utils.getLoggedInUserId(mContext);
Log.d(TAG,"In ImageViewAdapter: " +START_INDEX+" "+home_arrayList);
}
@Override
public int getCount() {
if(resourceId == R.layout.item_show_image_pager) {
return imageList.size();
}
return home_arrayList.size();
}
@Override
public boolean isViewFromObject(View view, Object object) {
if(resourceId == R.layout.item_home_pager_profile){
return view ==((RelativeLayout)object);
}
return view == ((LinearLayout) object);
}
@Override
public Object instantiateItem(ViewGroup container, final int position) {
Log.d(TAG,"In InstantiateItem" + position);
if(resourceId == R.layout.item_show_image_pager) {
itemView = mLayoutInflater.inflate(R.layout.item_show_image_pager, container, false);
Log.d(TAG, "In viewImage " + position + " " + START_INDEX);
ImageView imageView = (ImageView) itemView.findViewById(R.id.iv_asi_image);
Picasso.with(mContext).load(imageList.get(position))
.fit()
.centerCrop()
.error(R.drawable.logo_splash)
.into(imageView);
container.addView(itemView);
}else if(resourceId == R.layout.item_home_pager_header){
Log.d(TAG, "In homeImageHeader " + position + " " + START_INDEX);
itemView = mLayoutInflater.inflate(R.layout.item_home_pager_header, container, false);
ImageView imageView = (ImageView) itemView.findViewById(R.id.iv_home_image_header);
Picasso.with(mContext).load(String.valueOf(home_arrayList.get(position).getEnt_image()))
.fit()
.centerCrop()
.error(R.drawable.logo_splash)
.into(imageView);
container.addView(itemView);
itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
int fragId = 2;
Intent intent = new Intent(mContext, ActViewUserProfile.class);
intent.putExtra("item_id", home_arrayList.get(position).ent_id);
intent.putExtra("frag_id", fragId);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
mContext.startActivity(intent);
Toast.makeText(mContext, "complete item clicked", Toast.LENGTH_LONG).show();
}
});
}else if(resourceId == R.layout.item_home_pager_profile){
//here is the problem in yhis layout
Log.d(TAG, "In homeUserProfile " +home_arrayList);
itemView = mLayoutInflater.inflate(R.layout.item_home_pager_profile,container,false);
//function for setting all the elements of item
setUserCommends(itemView, position);
container.addView(itemView);
itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Log.d(TAG,"In ItemView Clicked");
int fragId = 3;
Intent intent = new Intent(mContext, ActViewUserProfile.class);
intent.putExtra("commend_id", home_arrayList.get(position).getUser_commend_id());
intent.putExtra("frag_id", fragId);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
mContext.startActivity(intent);
Toast.makeText(mContext, "complete item clicked", Toast.LENGTH_LONG).show();
}
});
}
return itemView;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
if(resourceId ==R.layout.item_show_image_pager) {
container.removeView((LinearLayout) object);
}else if(resourceId == R.layout.item_home_pager_profile){
container.removeView((RelativeLayout)object);
//container.removeViewAt(position);
Log.d(TAG,"In destroy Item " +container.getChildCount());
}
}
//method for setting all the elements
private void setUserCommends(View itemView, final int position){
Log.d(TAG,"In homeprofile setUserCommends " +position );
//Log.d(TAG,"In homeProfile1" +home_arrayList.get(position).getUser_product_image() +" "+home_arrayList.get(position).getUser_image());
ImageView ivProductImage = (ImageView) itemView.findViewById(R.id.iv_hpp_product_pic);
TextView tvProductName = (TextView) itemView.findViewById(R.id.tv_hpp_product_name);
TextView tvProductDesc = (TextView) itemView.findViewById(R.id.tv_hpp_description);
RoundedImageView ivUserImage = (RoundedImageView) itemView.findViewById(R.id.iv_hpp_user_profile_pic);
TextView tvUserName = (TextView) itemView.findViewById(R.id.tv_hpp_profile_name);
btnFollow = (Button) itemView.findViewById(R.id.btn_hpp_follow);
// btnUnFollow = (Button) itemView.findViewById(R.id.btn_hpp_unfollow);
userLogged = new User();
userLogged.setmUserName(home_arrayList.get(position).getUser_name());
userLogged.setmImageUrl(home_arrayList.get(position).getUser_image());
userLogged.setmFirstName(home_arrayList.get(position).getUser_name());
//checking for the buttons for each slides or when the screen first turns up
if(home_arrayList.get(position).getIs_following()== 0){
Log.d(TAG, "In check if " + home_arrayList.get(position).getIs_following());
btnFollow.setCompoundDrawablesWithIntrinsicBounds(R.mipmap.profile_follow, 0, 0, 0);
}else{
Log.d(TAG, "In check else " + home_arrayList.get(position).getIs_following());
btnFollow.setCompoundDrawablesWithIntrinsicBounds(R.mipmap.profile_following, 0, 0, 0);
}
if(!home_arrayList.get(position).getUser_product_image().isEmpty()) {
setImageWithPicasso(ivProductImage, home_arrayList.get(position).getUser_product_image());
}
if(!home_arrayList.get(position).getUser_image().isEmpty()){
setImageWithPicasso(ivUserImage, home_arrayList.get(position).getUser_image());
}
tvProductName.setText(home_arrayList.get(position).getUser_product_name());
tvProductDesc.setText(home_arrayList.get(position).getUser_commend_review());
tvUserName.setText(home_arrayList.get(position).getUser_name());
ivUserImage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Log.d(TAG,"In userImage Clicked");
int fragId = 1;
Intent intent = new Intent(mContext, ActViewUserProfile.class);
intent.putExtra("user_id", home_arrayList.get(position).getUser_id());
intent.putExtra("frag_id", fragId);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
mContext.startActivity(intent);
Toast.makeText(mContext, "complete item clicked", Toast.LENGTH_LONG).show();
}
});
//isFollowing = false;
//puttong the clickListener on the follow button
btnFollow.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Log.d(TAG,"In btnFollow Clicked");
//isIconC =!isIconChange;
if (isFollowing =true) {
Log.d(TAG, "in isFollowing");
isFollowing =false;
btnFollow.setCompoundDrawablesWithIntrinsicBounds(R.mipmap.profile_follow, 0, 0, 0);
unFollowUser(home_arrayList.get(position).getUser_id(), position);
} else {
Log.d(TAG, "in isNotFollowing");
isFollowing = true;
btnFollow.setCompoundDrawablesWithIntrinsicBounds(R.mipmap.profile_following, 0, 0, 0);
btnFollow.setText("UNFOLLOW");
//btnFollow.setEnabled(false);
followerUser(home_arrayList.get(position).getUser_id(), position);
}
}
});
}
private void setImageWithPicasso(ImageView imageView, String user_product_image){
Picasso.with(mContext).load(user_product_image)
.fit()
.centerCrop()
.error(R.drawable.logo_splash)
.into(imageView);
}
//Method for Following user
private void followerUser(String user_id, int position) {
final int FOLLOW_TAG = 0;
UserJSONUtils userJSONUtils = new UserJSONUtils(mContext);
String json =userJSONUtils. setDataToJson(userLogged,user_id);
//call the method to follow
callToServerToFollow(json, FOLLOW_TAG,position);
}
//method for UnFollowing user
private void unFollowUser(String user_id, int position){
final int UNFOLLOW_TAG = 1;
UserJSONUtils userJSONUtils = new UserJSONUtils(mContext);
String json = userJSONUtils.setDataToJson(userLogged,user_id);
//calling the method to follow
callToServerToFollow(json, UNFOLLOW_TAG,position);
}
// method for calling server
public void callToServerToFollow(String json,int TAG_FOLL,int position){
WebServerSetGetUserActivities webServerSetGetUserActivities = new WebServerSetGetUserActivities(mContext,btnFollow,btnUnFollow,null,null);
webServerSetGetUserActivities.addFollowUnFollow(json, TAG_FOLL, Tags.ACT_TAG.ACT_HOME_FEED,home_arrayList,position);
}
}
非常感谢任何帮助。
答案 0 :(得分：0)
注意，ViewPager上的片段状态正在初始化片段之前。 也就是说，如果在ViewPager上使用三个片段A，B，C，则在用户视图上B状态在A上初始化，在用户视图上B也是相同的。 有两种方法可以解决这个问题 1）使用A Fragment实现响应的请求方法并设置公共布尔值以获得响应结果为true，然后在需要按钮事件的B片段上检查布尔结果。 2）在AppController类中检查A片段的结果并设置为B片段。这将始终保持结果，即使应用程序处于onPause时也是如此。 检查此http://www.androidhive.info/2014/05/android-working-with-volley-library-1/以实现AppController类。