Question

我是Android新手

我有这个用于列出联系人的适配器类

import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ImageButton;
import android.widget.TextView;
import android.widget.Toast;

import java.util.List;

public class ContactAdapter extends RecyclerView.Adapter<ContactAdapter.MyViewHolder>{

    public ImageButton mCallButton, mMoreButton, mSmsButton, mEmailButton;
    public TextView mContactName;
    public List<Contact> mContactList;
    public Context mContext;

    public class MyViewHolder extends RecyclerView.ViewHolder implements OnClickListener{

        public MyViewHolder(View view) {
            super(view);
            mContactName = (TextView) view.findViewById(R.id.tv_contact_name);
            mCallButton = (ImageButton) view.findViewById(R.id.imgbtn_call);
            mMoreButton = (ImageButton) view.findViewById(R.id.imgbtn_more);
            mSmsButton = (ImageButton) view.findViewById(R.id.imgbtn_sms);
            mEmailButton = (ImageButton) view.findViewById(R.id.imgbtn_email);
            mContext = view.getContext();
            mCallButton.setOnClickListener(this);
            mMoreButton.setOnClickListener(this);
            mSmsButton.setOnClickListener(this);
            mEmailButton.setOnClickListener(this);
        }

        public void onClick(View v) {
            int index = getAdapterPosition();
            String number = mContactList.get(index).getContactNumber();
            String email = mContactList.get(index).getContactEmail();
            String name = mContactList.get(index).getContactName();
            if(v.getId() == mCallButton.getId()) {
                Intent callIntent = new Intent(Intent.ACTION_DIAL);
                callIntent.setData(Uri.parse("tel:"+number));
                mContext.startActivity(callIntent);
            }
            if(v.getId() == mMoreButton.getId()) {
                Log.d("Index kya hai?", index + "");
                mSmsButton.setVisibility(View.VISIBLE);
                mEmailButton.setVisibility(View.VISIBLE);
            }
            if(v.getId() == mSmsButton.getId()) {
                Intent smsIntent = new Intent(Intent.ACTION_VIEW);
                smsIntent.setType("vnd.android-dir/mms-sms");
                smsIntent.putExtra("address", number);
                mContext.startActivity(Intent.createChooser(smsIntent, "Send Sms To " + name + " (" + number + ")"));
            }
            if(v.getId() == mEmailButton.getId()) {
                Intent emailIntent = new Intent(Intent.ACTION_SEND);
                emailIntent.setType("text/plain");
                emailIntent.putExtra(Intent.EXTRA_EMAIL, email);
                mContext.startActivity(Intent.createChooser(emailIntent, "Send Email to " + email));
            }
        }
    }



    public ContactAdapter(List<Contact> contactList) {
        mContactList = contactList;
    }

    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View itemView = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.single_contact_layout, parent, false);
        return new MyViewHolder(itemView);
    }

    public void onBindViewHolder(MyViewHolder holder, int position) {
        Contact contact = mContactList.get(position);
        mContactName.setText(contact.getContactName());
    }

    public int getItemCount() {
        return mContactList.size();
    }
}

现在有一个图片按钮mMoreButton只有一个显示隐藏图片按钮mSmsButton，mEmailButton的工作，但每当我点击时，该按钮都没有显示正确的索引（？）

假设我点击了索引5，但是mEmailButtton和mSmsButton会出现在随机索引10上，我不知道我做错了什么

Answer 1

将您的观看次数（<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:id="@+id/parent_linear" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:background="@color/splash_color" android:weightSum="100"> <RelativeLayout android:id="@+id/rel1" android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="50"> <com.rey.material.widget.ImageView android:id="@+id/welcome_Image" android:layout_width="match_parent" android:layout_height="match_parent" android:src="@drawable/welcome" android:layout_alignParentBottom="true"/> </RelativeLayout> <RelativeLayout android:id="@+id/welcomeRelativeTwo" android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="50" android:padding="@dimen/universal_margin4" > <com.rey.material.widget.TextView android:id="@+id/Ready" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/welcome_ready" android:layout_alignParentTop="true" android:layout_centerHorizontal="true" android:textSize="@dimen/universal_margin2" android:layout_centerInParent="true" /> <com.rey.material.widget.TextView android:id="@+id/description" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/welcome_descrition" android:layout_below="@+id/Ready" android:textAlignment="center" android:layout_centerHorizontal="true" android:layout_marginTop="@dimen/universal_margin" /> <com.rey.material.widget.Button xmlns:tools="http://schemas.android.com/tools" android:id="@+id/welcomeBtn" app:rd_enable="true" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_below="@+id/description" android:text="@string/welcome_btntext" android:textColor="@color/splash_color" android:background="@color/colorAccent" android:layout_marginTop="@dimen/universal_margin2" /> </RelativeLayout>  </LinearLayout>和TextView）移至ImageButton课程，以便不会始终替换他们的观点。或者您可以在ViewHolder方法下设置按钮单击侦听器，这是我在创建自定义Recyclerview适配器时始终执行的操作。

onBindViewHolder

，您的ImageButton mSmsButton_last, mEmailButton_last; public void onBindViewHolder(MyViewHolder holder, int position) { Contact contact = mContactList.get(position); holder.mContactName.setText(contact.getContactName()); holder.mCallButton.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { Intent callIntent = new Intent(Intent.ACTION_DIAL); callIntent.setData(Uri.parse("tel:"+number)); mContext.startActivity(callIntent); } }); holder.mMoreButton.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { Log.d("Index kya hai?", index + ""); holder.mSmsButton.setVisibility(View.VISIBLE); holder.mEmailButton.setVisibility(View.VISIBLE); if (mSmsButton_last != null && mEmailButton_last != null) { mSmsButton_last.setVisibility(View.GONE); mEmailButton_last.setVisibility(View.GONE); } mSmsButton_last = holder.mSmsButton; mEmailButton_last = holder.mEmailButton; } }); holder.mSmsButton.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { Intent smsIntent = new Intent(Intent.ACTION_VIEW); smsIntent.setType("vnd.android-dir/mms-sms"); smsIntent.putExtra("address", number); mContext.startActivity(Intent.createChooser(smsIntent, "Send Sms To " + name + " (" + number + ")")); } }); holder.mEmailButton.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { Intent emailIntent = new Intent(Intent.ACTION_SEND); emailIntent.setType("text/plain"); emailIntent.putExtra(Intent.EXTRA_EMAIL, email); mContext.startActivity(Intent.createChooser(emailIntent, "Send Email to " + email)); } }); }将会是这样的

ViewHolder

希望这适合你。：）

在回收站视图中单击项目时显示按钮

1 个答案: