Özelliği gösteren bu örnek kod göz atın. notifyItemChanged(position, payload)
numaralı telefonu arayarak, position
numaralı adrese tıklandığında RecyclerView
numaralı telefonu tıklatır. Logcat deyimini arayarak onBindViewHolder(holder, position, payload)
'un çağrıldığını doğrulayabilirsiniz.
bunu gibi en az sürümünü destek kütüphanelerin 23.1.1
kullandığınızdan emin olun:
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:23.1.1'
compile 'com.android.support:recyclerview-v7:23.1.1'
compile 'com.android.support:cardview-v7:23.1.1'
}
HelloActivity.java
package com.formagrid.hellotest;
import android.app.Activity;
import android.os.Bundle;
import android.support.v7.widget.CardView;
import android.support.v7.widget.DefaultItemAnimator;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import java.util.List;
public class HelloActivity extends Activity {
private RecyclerView mRecyclerView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mRecyclerView = (RecyclerView) findViewById(R.id.recycler_view);
mRecyclerView.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false));
mRecyclerView.setAdapter(new HelloAdapter());
DefaultItemAnimator animator = new DefaultItemAnimator() {
@Override
public boolean canReuseUpdatedViewHolder(RecyclerView.ViewHolder viewHolder) {
return true;
}
};
mRecyclerView.setItemAnimator(animator);
}
private static class HelloAdapter extends RecyclerView.Adapter<HelloAdapter.HelloViewHolder> {
public class HelloViewHolder extends RecyclerView.ViewHolder {
public TextView textView;
public HelloViewHolder(CardView cardView) {
super(cardView);
textView = (TextView) cardView.findViewById(R.id.text_view);
}
}
@Override
public HelloViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
CardView cardView = (CardView) LayoutInflater.from(parent.getContext()).inflate(
R.layout.card_item, parent, false);
return new HelloViewHolder(cardView);
}
@Override
public void onBindViewHolder(HelloViewHolder holder, int position) {
bind(holder);
}
@Override
public void onBindViewHolder(HelloViewHolder holder, int position, List<Object> payload) {
Log.d("butt", "payload " + payload.toString());
bind(holder);
}
@Override
public int getItemCount() {
return 20;
}
private void bind(final HelloViewHolder holder) {
holder.textView.setText("item " + holder.getAdapterPosition());
holder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
final int position = holder.getAdapterPosition();
Log.d("butt", "click " + position);
HelloAdapter.this.notifyItemChanged(position, "payload " + position);
}
});
}
}
}
activity_main.xml
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".HelloActivity">
<android.support.v7.widget.RecyclerView
android:id="@+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</RelativeLayout>
card_item. xml
Eğer
tüm tutucu Görünüm ama sadece
bölümünü güncellemek isterseniz<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="100dip"
android:layout_margin="5dip"
card_view:cardElevation="5dip">
<TextView
android:id="@+id/text_view"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</android.support.v7.widget.CardView>
Sadece kodunuzu test ettim. Testimde işe yaramaz bir şey var: temel onBind (yük olmadan) asla çağrılamaz. Şimdi neden yapıyorsun Ben sadece notifyItemRangeChanged (index, mArrayList.size()); veya notifyItemInserted (i); – Cocorico
olgunlaşmamış kayıt etiketine bakın +1 – styler1972