android - Vista de reciclaje que infla diferentes filas:-Obteniendo una excepción al vincular los datos
android-recyclerview recycler-adapter (2)
Estoy trabajando en el
Recyceview
con diferentes elementos de inflación.
Cuando
NO
estoy vinculando los datos en el método
RecycleView
de
RecycleView
no se
RecycleView
.
Pero cuando estoy vinculando los datos dentro de
onBindViewHolder
que
onBindViewHolder
la
Exception
, compruebe mi código y avíseme dónde estoy haciendo mal.
package com.tv.practise.adapter;
/**
Created by Ravindra Kushwaha on 10/10/16.
*/
public class RecycleDataAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private Context mContext;
private ArrayList<RecycleBen> data;
public static class SimpleText extends RecyclerView.ViewHolder {
TextView first_data_tv;
public SimpleText(View v) {
super(v);
this.first_data_tv = (TextView) v.findViewById(R.id.first_data_tv);
}
}
public class SimpleImage extends RecyclerView.ViewHolder {
ImageView second_data_iv;
public SimpleImage(View v) {
super(v);
this.second_data_iv = (ImageView) v.findViewById(R.id.second_data_iv);
}
}
public class SimpleImageWithText extends RecyclerView.ViewHolder {
TextView third_data_tv;
ImageView third_iv;
public SimpleImageWithText(View v) {
super(v);
this.third_data_tv = (TextView) v.findViewById(R.id.third_data_tv);
this.third_iv = (ImageView) v.findViewById(R.id.third_iv);
}
}
public RecycleDataAdapter(Context mContext, ArrayList<RecycleBen> data) {
this.mContext = mContext;
this.data = data;
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
int listViewItemType = getItemViewType(viewType);
View itemView;
if(listViewItemType==1)
{
itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.recycle_first_item, parent, false);
return new SimpleText(itemView
);
}
else if(listViewItemType==2)
{
itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.recycle_fsecond_item, parent, false);
return new SimpleImage(itemView);
}
else
{
itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.recycle_third_item, parent, false);
return new SimpleImageWithText(itemView);
}
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
RecycleBen bean = data.get(position);
if(holder.getItemViewType()==1)
{
/////HERE I AM GETTING THE EXCEPTION WHILE BINDIND DATA
((SimpleText)holder).first_data_tv.setText(bean.getName());
}
else if(holder.getItemViewType()==2)
{
}
else {
/////HERE I AM GETTING THE EXCEPTION WHILE BINDIND DATA((SimpleImageWithText)holder).third_data_tv.setText(bean.getName());
}
}
@Override
public int getItemViewType(int position) {
return Integer.parseInt(data.get(position).getType_row());
}
@Override
public int getItemCount() {
return data.size();
}
}
Excepción
mientras estoy vinculando los datos son los siguientes: -
3758-3758/com.tv.practise E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.tv.practise, PID: 3758
java.lang.ClassCastException: com.tv.practise.adapter.RecycleDataAdapter$SimpleImageWithText cannot be cast to com.tv.practise.adapter.RecycleDataAdapter$SimpleText
at com.tv.practise.adapter.RecycleDataAdapter.onBindViewHolder(RecycleDataAdapter.java:101)
at android.support.v7.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:5471)
at android.support.v7.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:5504)
at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:4741)
at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:4617)
at android.support.v7.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:1994)
at android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1390)
at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1353)
at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:574)
at android.support.v7.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:3028)
at android.support.v7.widget.RecyclerView.onMeasure(RecyclerView.java:2625)
at android.view.View.measure(View.java:18804)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5954)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1465)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:748)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:630)
at android.view.View.measure(View.java:18804)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5954)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at android.view.View.measure(View.java:18804)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5954)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1465)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:748)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:630)
at android.view.View.measure(View.java:18804)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5954)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at com.android.internal.policy.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2643)
at android.view.View.measure(View.java:18804)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2112)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1228)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1464)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1119)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6060)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:858)
at android.view.Choreographer.doCallbacks(Choreographer.java:670)
at android.view.Choreographer.doFrame(Choreographer.java:606)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:844)
at android.os.Handler.handleCallback(Handler.java:746)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5443)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
El motivo es
onCreateViewHolder(ViewGroup parent, int viewType)
.
El parámetro es el tipo de vista pero no la posición.
Usar
int listViewItemType = getItemViewType(viewType)
es incorrecto porque la
position
debe pasarse a
getItemViewType
.
En resumen, debe usar
viewType
directamente y eliminar
listViewItemType
en
onCreateViewHolder
.
@Joshua acortó
mi problema ...
Para los otros usuarios que estoy publicando aquí, está el código para inflar las diferentes filas
(3 filas)
en
RecycleView
Y funciona bien, verifique las siguientes líneas del código: -
Estoy publicando mi código completo aquí, por favor verifique: -
Aquí
RecyleClass.java
es mi clase principal
package com.tv.practise.recycleview;
import android.app.Activity;
import android.os.Bundle;
import android.support.v7.widget.DefaultItemAnimator;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import com.tv.practise.R;
import java.util.ArrayList;
/**
* Created by Ravindra Kushwaha on 10/10/16.
*/
public class RecyleClass extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.recycle_main);
RecyclerView recycler_vw = (RecyclerView)findViewById(R.id.recycler_vw);
ArrayList<RecycleBen> arrayList = new ArrayList<>();
for (int i = 0;i<=25;i++)
{
RecycleBen bean = new RecycleBen();
if(i%2==0)
{
bean.setType_row("1");
bean.setName("First element");
bean.setImage_url("http://www.androhub.com/wp-content/uploads/2015/09/staggeredrecyclerview_banner.jpg");
}
else if(i%3==0)
{
bean.setType_row("2");
bean.setName("Second element");
bean.setImage_url("http://i.stack.imgur.com/snB84.png");
}
else
{
bean.setType_row("3");
bean.setName("Third element");
bean.setImage_url("http://inducesmile.com/wp-content/uploads/2015/05/gridbanner.jpg");
}
arrayList.add(bean);
}
RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(this);
recycler_vw.setLayoutManager(mLayoutManager);
recycler_vw.setItemAnimator(new DefaultItemAnimator());
recycler_vw.setAdapter(new RecycleDataAdapter(this, arrayList));
}
}
Aquí está mi
layout
para
RecyleClass.java
que es
recycle_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:id="@+id/recycler_vw"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:clipToPadding="false"
/>
</LinearLayout>
Entrada de
graduados
para la vista de
Recycleview
con
CardView
y
Glide
// CardView
compile ''com.android.support:cardview-v7:23.4.0''
// RecyclerView
compile ''com.android.support:recyclerview-v7:23.4.0''
// For the glide libraray
compile ''com.github.bumptech.glide:glide:3.7.0''
Y a continuación está mi clase
getter
y
setter
que es
RecycleBen.java
package com.tv.practise.recycleview;
/**
* Created by Ravindra Kushwaha on 10/10/16.
*/
public class RecycleBen {
private String type_row;
private String name;
private String image_url;
public String getType_row() {
return type_row;
}
public void setType_row(String type_row) {
this.type_row = type_row;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getImage_url() {
return image_url;
}
public void setImage_url(String image_url) {
this.image_url = image_url;
}
}
Y por último mi clase de Adaptador que es
RecycleDataAdapter.java
package com.tv.practise.adapter;
/**
* Created by Ravindra Kushwaha on 10/10/16.
*/
public class RecycleDataAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private Context mContext;
private ArrayList<RecycleBen> data;
public class SimpleText extends RecyclerView.ViewHolder {
TextView first_data_tv;
public SimpleText(View v) {
super(v);
this.first_data_tv = (TextView) v.findViewById(R.id.first_data_tv);
}
}
public class SimpleImage extends RecyclerView.ViewHolder {
ImageView second_data_iv;
ProgressBar second_pb;
public SimpleImage(View v) {
super(v);
this.second_data_iv = (ImageView) v.findViewById(R.id.second_data_iv);
this.second_pb = (ProgressBar)v.findViewById(R.id.second_pb);
}
}
public class SimpleImageWithText extends RecyclerView.ViewHolder {
TextView third_data_tv;
ImageView third_iv;
ProgressBar third_pb;
public SimpleImageWithText(View v) {
super(v);
this.third_data_tv = (TextView) v.findViewById(R.id.third_data_tv);
this.third_iv = (ImageView) v.findViewById(R.id.third_iv);
this.third_pb = (ProgressBar)v.findViewById(R.id.third_pb);
}
}
public RecycleDataAdapter(Context mContext, ArrayList<RecycleBen> data) {
this.mContext = mContext;
this.data = data;
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView;
if(viewType==1)
{
itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.recycle_first_item, parent, false);
return new SimpleText(itemView
);
}
else if(viewType==2)
{
itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.recycle_fsecond_item, parent, false);
return new SimpleImage(itemView);
}
else
{
itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.recycle_third_item, parent, false);
return new SimpleImageWithText(itemView);
}
}
@Override
public void onBindViewHolder(final RecyclerView.ViewHolder holder, int position) {
RecycleBen bean = data.get(position);
if(holder.getItemViewType()==1)
{
((SimpleText)holder).first_data_tv.setText(bean.getName());
}
else if(holder.getItemViewType()==2)
{
final SimpleImage simple_holder = (SimpleImage)holder;
simple_holder.second_pb.setVisibility(View.VISIBLE);
Glide.with(mContext)
.load(bean.getImage_url())
.fitCenter()
.crossFade()
.listener(new RequestListener<String, GlideDrawable>() {
@Override
public boolean onException(Exception e, String model, Target<GlideDrawable> target, boolean isFirstResource) {
if (e instanceof UnknownHostException)
simple_holder.second_pb.setVisibility(View.VISIBLE);
return false;
}
@Override
public boolean onResourceReady(GlideDrawable resource, String model, Target<GlideDrawable> target, boolean isFromMemoryCache, boolean isFirstResource) {
simple_holder.second_pb.setVisibility(View.GONE);
simple_holder.second_data_iv.setVisibility(View.VISIBLE);
return false;
}
}).into(simple_holder.second_data_iv);;
}
else {
final SimpleImageWithText third_holder = (SimpleImageWithText)holder;
third_holder.third_data_tv.setText(bean.getName());
third_holder.third_pb.setVisibility(View.VISIBLE);
Glide.with(mContext)
.load(bean.getImage_url())
.fitCenter()
.crossFade()
.listener(new RequestListener<String, GlideDrawable>() {
@Override
public boolean onException(Exception e, String model, Target<GlideDrawable> target, boolean isFirstResource) {
if (e instanceof UnknownHostException)
third_holder.third_pb.setVisibility(View.VISIBLE);
return false;
}
@Override
public boolean onResourceReady(GlideDrawable resource, String model, Target<GlideDrawable> target, boolean isFromMemoryCache, boolean isFirstResource) {
third_holder.third_pb.setVisibility(View.GONE);
third_holder.third_iv.setVisibility(View.VISIBLE);
return false;
}
}).into(third_holder.third_iv);;
}
}
@Override
public int getItemViewType(int position) {
return Integer.parseInt(data.get(position).getType_row());
}
@Override
public int getItemCount() {
return data.size();
}
}
Como estamos inflando las diferentes filas en la vista de
Recycleview
, utilizamos aquí
3
recycle_first_item.xml
que son como
recycle_first_item.xml
,
recycle_fsecond_item.xml
y el último
recycle_third_item.xml
Uno por uno, estoy mostrando todos los diseños
xml
, que son los siguientes:
recycle_first_item.xml
<?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:id="@+id/card_view"
android:layout_width="match_parent"
android:layout_height="100dp"
android:layout_gravity="center"
android:layout_margin="5dp"
card_view:cardCornerRadius="4dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center">
<TextView
android:id="@+id/first_data_tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="@android:color/black"
android:textSize="25sp"
android:text="Hello Card" />
</LinearLayout>
recycle_fsecond_item.xml
<?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:id="@+id/card_view"
android:layout_width="match_parent"
android:layout_height="150dp"
android:layout_gravity="center"
android:layout_margin="5dp"
card_view:cardCornerRadius="4dp">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<ProgressBar
android:id="@+id/second_pb"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_centerInParent="true"
/>
<ImageView
android:id="@+id/second_data_iv"
android:layout_width="match_parent"
android:layout_height="120dp"
android:textColor="@android:color/black"
android:layout_centerInParent="true"
android:visibility="invisible"
android:src="@drawable/bubble1" />
</RelativeLayout>
</android.support.v7.widget.CardView>
recycle_third_item.xml
<?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:id="@+id/card_view"
android:layout_width="match_parent"
android:layout_height="150dp"
android:layout_gravity="center"
android:layout_margin="5dp"
card_view:cardCornerRadius="4dp">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center">
<TextView
android:id="@+id/third_data_tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="@android:color/black"
android:textSize="25sp"
android:layout_centerInParent="true"
android:text="Hello Card" />
<ProgressBar
android:id="@+id/third_pb"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_centerInParent="true"
android:layout_below="@+id/third_data_tv"
/>
<ImageView
android:id="@+id/third_iv"
android:layout_width="match_parent"
android:layout_below="@+id/third_data_tv"
android:layout_height="150dp"
android:src="@drawable/bubble2"
android:layout_centerInParent="true"
android:visibility="invisible"
/>
</RelativeLayout>
</android.support.v7.widget.CardView>
