I'm trying to make custom adapter for my small app, I got stuck in filling my rows with data, I can't find a good tutorial for that. I know how to use Simple Adapter and Array Adapter, but custom ones have some trouble.
I don't know how to implement it, and the online articles confused me, Please help me with the logic and what steps should I do implement.
package com.example.administrator.healthyfood;
import android.content.Context;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.BaseAdapter;
import android.widget.ListView;
public class MainActivity extends AppCompatActivity {
ListView list;
String[] food = {"Dog","Cat","Cow","Fish","Frog","Bird","Rabbit","Horse","Chikcen"};
#Override
protected void onCreate(Bundle savedInstanceState) {
list = (ListView)findViewById(R.id.listView);
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public class MyListViewAdapter extends BaseAdapter {
#Override
public int getCount() {
return food.lenght();
}
#Override
public long getItemId(int i) {
return 0;
}
#Override
public Object getItem(int i) {
return null;
}
#Override
public View getView(int i, View view, ViewGroup viewGroup) {
return null;
}
}
}
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=".MainActivity" >
<ListView
android:id="#+id/list"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true" >
</ListView>
</RelativeLayout>
custom.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<LinearLayout
android:layout_width="255dp"
android:layout_height="wrap_content"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TextView
android:id="#+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Video1"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textColor="#339966"
android:textStyle="bold" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TextView
android:id="#+id/detail"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="video1"
android:textColor="#606060" />
</LinearLayout>
</LinearLayout>
<ImageView
android:id="#+id/img"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_launcher" />
</LinearLayout>
</LinearLayout>
Your MainActivity.java -
package com.example.sample;
import android.app.Activity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
public class MainActivity extends Activity {
ListView l1;
String[] t1={"video1","video2"};
String[] d1={"lesson1","lesson2"};
int[] i1 ={R.drawable.ic_launcher,R.drawable.ic_launcher};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
l1=(ListView)findViewById(R.id.list);
l1.setAdapter(new dataListAdapter(t1,d1,i1));
}
class dataListAdapter extends BaseAdapter {
String[] Title, Detail;
int[] imge;
dataListAdapter() {
Title = null;
Detail = null;
imge=null;
}
public dataListAdapter(String[] text, String[] text1,int[] text3) {
Title = text;
Detail = text1;
imge = text3;
}
public int getCount() {
// TODO Auto-generated method stub
return Title.length;
}
public Object getItem(int arg0) {
// TODO Auto-generated method stub
return null;
}
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = getLayoutInflater();
View row;
row = inflater.inflate(R.layout.custom, parent, false);
TextView title, detail;
ImageView i1;
title = (TextView) row.findViewById(R.id.title);
detail = (TextView) row.findViewById(R.id.detail);
i1=(ImageView)row.findViewById(R.id.img);
title.setText(Title[position]);
detail.setText(Detail[position]);
i1.setImageResource(imge[position]);
return (row);
}
}
}
Hope this is enough for you.
You can create a simple Adapter class using these simple steps
make a java class
public class Wallet_Adapter extends RecyclerView.Adapter<Wallet_Adapter.ViewHolder>
{
LayoutInflater inflater;
List<Wallet_Model> modelclasslists;
public Wallet_Adapter(Context ctx, List<Wallet_Model> modelclasslists)
{
this.inflater=LayoutInflater.from(ctx);
this.modelclasslists=modelclasslists;
}
#NonNull
#Override
public Wallet_Adapter.ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view=inflater.inflate(R.layout.layout_wallet,parent,false);
return new Wallet_Adapter.ViewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull Wallet_Adapter.ViewHolder holder, int position) {
holder.date.setText(modelclasslists.get(position).getDate());
holder.amount.setText(modelclasslists.get(position).getAmount());
holder.description.setText(modelclasslists.get(position).getDescription());
holder.type.setText(modelclasslists.get(position).getType());
}
#Override
public int getItemCount() {return modelclasslists.size(); }
public class ViewHolder extends RecyclerView.ViewHolder
{
TextView date,amount,description,type;
public ViewHolder(#NonNull View itemView)
{
super(itemView);
date=itemView.findViewById(R.id.dateans);
amount=itemView.findViewById(R.id.amountans);
description=itemView.findViewById(R.id.descriptionans);
type=itemView.findViewById(R.id.typeans);
}
}
}
Related
i wanted to use intro slider to my App
i learned it by this video https://www.youtube.com/watch?v=byLKoPgB7yA&t=22s
I do like video tutorial but I have a problem with dots
when I slide to any page the dots(. ) will be copy and increase
where is my problem and what should I do ?
package time.one.just.show.introslyder;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.Html;
import android.widget.LinearLayout;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
private ViewPager mSlideViewPager;
private LinearLayout mDotsLayout;
private SlyderAdapter slyderAdapter;
//dots of any Slide pages
private TextView[] mDots;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mSlideViewPager = findViewById(R.id.viewPager);
mDotsLayout = findViewById(R.id.dots);
slyderAdapter = new SlyderAdapter(this);
mSlideViewPager.setAdapter(slyderAdapter);
addDotsIndiccator(0);
mSlideViewPager.addOnPageChangeListener(viewListener);
}
private void addDotsIndiccator(int position) {
mDots = new TextView[3];
for (int i = 0; i < mDots.length; i++) {
mDots[i] = new TextView(this);
mDots[i].setText(Html.fromHtml("•"));
mDots[i].setTextSize(35);
mDots[i].setTextColor(getResources().getColor(R.color.colorWhiteNearToGray));
mDotsLayout.addView(mDots[i]);
}
if (mDots.length > 0) {
mDots[position].setTextColor(getResources().getColor(R.color.colorWite));
}
}
ViewPager.OnPageChangeListener viewListener = new ViewPager.OnPageChangeListener() {
#Override
public void onPageScrolled(int i, float v, int i1) {
}
#Override
public void onPageSelected(int i) {
addDotsIndiccator(i);
}
#Override
public void onPageScrollStateChanged(int i) {
}
};}
And this is my SideAdapter class
package time.one.just.show.introslyder;
import android.content.Context;
import android.support.annotation.NonNull;
import android.support.v4.view.PagerAdapter;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;
public class SlyderAdapter extends PagerAdapter {
Context context;
LayoutInflater layoutInflater;
public SlyderAdapter(Context context) {
this.context = context;
}
public int[] slide_imagesArray = {
R.drawable.eat,
R.drawable.men,
R.drawable.sleep};
public String[] slide_headerArray = {
"EAT", "men", "code"};
public String[] slide_descriptionArray = {
"this is 1st", "this is 2nd", "this is 3rd"
};
#Override
public int getCount() {
return slide_headerArray.length;
}
#Override
public boolean isViewFromObject(#NonNull View view, #NonNull Object o) {
return view == o;
}
#NonNull
#Override
public Object instantiateItem(#NonNull ViewGroup container, int position) {
layoutInflater = (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
View view = layoutInflater.inflate(R.layout.slide_layoout, container, false);
ImageView slideImageView = (ImageView) view.findViewById(R.id.slideImage);
TextView slideheader = (TextView) view.findViewById(R.id.slideheader);
TextView slidedescription = (TextView) view.findViewById(R.id.slideDescription);
slideImageView.setImageResource(slide_imagesArray[position]);
slideheader.setText(slide_headerArray[position]);
slidedescription.setText(slide_descriptionArray[position]);
container.addView(view);
return view;
}
#Override
public void destroyItem(#NonNull ViewGroup container, int position, #NonNull Object object) {
container.removeView((RelativeLayout) object);
}
}
and this is my SliderLayout
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent" android:layout_height="match_parent">
<ImageView
android:id="#+id/slideImage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="89dp"
app:srcCompat="#drawable/eat" />
<TextView
android:id="#+id/slideheader"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentBottom="true"
android:layout_marginStart="122dp"
android:layout_marginBottom="287dp"
android:text="بدون نیاز به اینترنت"
android:textSize="20sp"
android:textStyle="bold" />
<TextView
android:id="#+id/slideDescription"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentBottom="true"
android:layout_marginStart="0dp"
android:layout_marginBottom="171dp"
android:text="آرشیو کامل این خواننده محبوب همیشه در جیب شم ، ، هر کدام ز آهنگ ها را خواستید می توانید دانلود کنید و هر زمان دلتون خوست به آن ها گوش بدهید حتی بدون نیز به اینترنت" />
</RelativeLayout>
and activtymain xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:background="#drawable/main_background"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<android.support.v4.view.ViewPager
android:id="#+id/viewPager"
android:layout_width="match_parent"
android:layout_height="match_parent">
</android.support.v4.view.ViewPager>
<LinearLayout
android:id="#+id/dots"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:orientation="horizontal"></LinearLayout>
</RelativeLayout>
I found a solution
just by add this inside my App
mDotsLayout.removeAllViews();
thank you all
I have following code that should:
listView = (ListView) findViewById(R.id.listview_github_entries);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
}
});
This is what I load into the ListView:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/list_item"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="10dp"
android:orientation="horizontal"
android:clickable="true">
<ImageView
android:layout_width="100dp"
android:layout_height="100dp"
android:src="#mipmap/github_icon"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="#+id/github_name"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<TextView
android:id="#+id/github_url"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
</LinearLayout>
Here is the Adapter :
public class GithubEntryAdapter extends ArrayAdapter<GithubEntry>{
public GithubEntryAdapter(Activity context, ArrayList<GithubEntry> githubEntries){
super(context, 0, githubEntries);
}
public View getView(int position, View convertView, ViewGroup parent){
View listItemView = convertView;
if (listItemView == null){
listItemView = LayoutInflater.from(getContext()).inflate(
R.layout.list_item, parent, false);
}
GithubEntry currentGithubEntry = getItem(position);
TextView github_url = (TextView) listItemView.findViewById(R.id.github_url);
github_url.setText(currentGithubEntry.getGithub_url());
TextView github_name = (TextView) listItemView.findViewById(R.id.github_name);
github_name.setText(currentGithubEntry.getGithub_name());
return listItemView;
}
}
This is not working for me. Im no quit sure where I should place this code. Can I place this in the onCreate? If not where should I move it? I completly new in Android and I have also not much experience in Java.
Here is what i did for you..
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.Toast;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
private ListView listView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = (ListView) findViewById(R.id.listview_github_entries);
listView.setAdapter(new GithubEntryAdapter(MainActivity.this, getList()));
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
TextView github_url_tv = view.findViewById(R.id.github_url);
String url_text= github_url_tv.getText().toString();
Toast.makeText(MainActivity.this, url_text", Toast.LENGTH_LONG).show();
}
});
}
private ArrayList<GithubEntry> getList() {
ArrayList<GithubEntry> githubEntries = new ArrayList<>();
GithubEntry githubEntry = new GithubEntry();
githubEntry.setGithub_name("Name");
githubEntry.setGithub_url("url");
GithubEntry githubEntry1 = new GithubEntry();
githubEntry1.setGithub_name("Name");
githubEntry1.setGithub_url("url");
GithubEntry githubEntry2 = new GithubEntry();
githubEntry2.setGithub_name("Name");
githubEntry2.setGithub_url("url");
githubEntries.add(githubEntry);
githubEntries.add(githubEntry1);
githubEntries.add(githubEntry2);
return githubEntries;
}
}
Here is adapter
import android.app.Activity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;
import java.util.ArrayList;
public class GithubEntryAdapter extends ArrayAdapter<GithubEntry> {
public GithubEntryAdapter(Activity context, ArrayList<GithubEntry>
githubEntries){
super(context, 0, githubEntries);
}
public View getView(int position, View convertView, ViewGroup parent){
View listItemView = convertView;
if (listItemView == null){
listItemView = LayoutInflater.from(getContext()).inflate(
R.layout.list_item, parent, false);
}
GithubEntry currentGithubEntry = getItem(position);
TextView github_url = (TextView) listItemView.findViewById(R.id.github_url);
github_url.setText(currentGithubEntry.getGithub_url());
TextView github_name = (TextView) listItemView.findViewById(R.id.github_name);
github_name.setText(currentGithubEntry.getGithub_name());
return listItemView;
}
}
here is POJO(plan java object) class
class GithubEntry {
private String Github_url;
private String Github_name;
public String getGithub_url() {
return Github_url;
}
public void setGithub_url(String github_url) {
Github_url = github_url;
}
public String getGithub_name() {
return Github_name;
}
public void setGithub_name(String github_name) {
Github_name = github_name;
}
}
and here is list_item
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/list_item"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="10dp"
android:orientation="horizontal"
android:clickable="false">
<ImageView
android:layout_width="100dp"
android:layout_height="100dp"
android:src="#mipmap/ic_launcher_round"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="#+id/github_name"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<TextView
android:id="#+id/github_url"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
</LinearLayout>
and here is activity layout
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.kaimeramedia.githubentry.MainActivity">
<ListView
android:id="#+id/listview_github_entries"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
If mean that the OnItemClickListeneter not working, then you need to implement a custom adapter by extending ArrayAdater to serve you custom row, And in the custom adapter you can use a callback interface or implement a listener on the view it self See the example.
I think you want to display the list of values here. You should write it inside onCreate because onCreate is a method where you method starts and run. So, Put it inside onCreate. For more correct answer please explain everything.
I'm a beginner with Android and struggling with the implementation of a RecyclerView. Was working through a tutorial and changing the values to what I need. But when I start, the view stays empty. As far as I was planning, it was supposed to show 20 times the same item for the moment.
ExerciseList.java (Start Activity):
package com.example.erik.orlandoapp;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
public class ExerciseList extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setTitle(getString(R.string.title_activity_exercise_list));
setContentView(R.layout.activity_exercise_list);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
}
}
ExerciseBlock.java:
package com.example.erik.orlandoapp;
import java.util.ArrayList;
import java.util.List;
public class ExerciseBlock {
private String title;
private int difficulty;
private int exerciseId;
private static int lastId = 0;
public ExerciseBlock(String title, int difficulty, int exerciseId) {
this.title = title;
this.difficulty = difficulty;
this.exerciseId = exerciseId;
}
public String getTitle() {
return title;
}
public int getDifficulty() {
return difficulty;
}
public int getExerciseId() {
return exerciseId;
}
public static ArrayList<ExerciseBlock> createContactsList(int numContacts) {
ArrayList<ExerciseBlock> exerciseBlocks = new ArrayList<ExerciseBlock>();
for (int i = 1; i <= numContacts; i++) {
exerciseBlocks.add(new ExerciseBlock("Title",1,1));
}
return exerciseBlocks;
}
}
ExerciseBlockAdapter.java:
package com.example.erik.orlandoapp;
import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import java.util.List;
public class ExerciseBlockAdapter extends RecyclerView.Adapter<ExerciseBlockAdapter.ViewHolder> {
private List<ExerciseBlock> exList;
private Context mContext;
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
Context context = parent.getContext();
LayoutInflater inflater = LayoutInflater.from(context);
View contactView = inflater.inflate(R.layout.exercise_item, parent, false);
ViewHolder viewHolder = new ViewHolder(contactView);
return viewHolder;
}
#Override
public void onBindViewHolder(ViewHolder viewHolder, int position) {
ExerciseBlock exBlock = exList.get(position);
TextView textView = viewHolder.getTxtDiff();
textView.setText(exBlock.getDifficulty());
textView = viewHolder.getTxtExercise();
textView.setText(exBlock.getExerciseId());
}
#Override
public int getItemCount() {
return exList.size();
}
public ExerciseBlockAdapter(Context context, List<ExerciseBlock> exList) {
this.exList = exList;
this.mContext = context;
}
public static class ViewHolder extends RecyclerView.ViewHolder {
private TextView txtExercise;
private TextView txtDiff;
public TextView getTxtExercise() {
return this.txtExercise;
}
public TextView getTxtDiff() {
return this.txtDiff;
}
public ViewHolder(View itemView) {
super(itemView);
txtDiff = (TextView) itemView.findViewById(R.id.txtExDiff);
txtExercise = (TextView) itemView.findViewById(R.id.txtExName);
}
}
}
UserListActivity:
package com.example.erik.orlandoapp;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import java.util.ArrayList;
public class UserListActivity extends AppCompatActivity {
ArrayList<ExerciseBlock> exerciseBlocks;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
RecyclerView rvContacts = (RecyclerView) findViewById(R.id.exerciseList);
exerciseBlocks = ExerciseBlock.createContactsList(20);
ExerciseBlockAdapter adapter = new ExerciseBlockAdapter(this, exerciseBlocks);
rvContacts.setAdapter(adapter);
rvContacts.setLayoutManager(new LinearLayoutManager(this));
}
}
activity_exercise_list.xml:
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context="com.example.erik.orlandoapp.ExerciseList">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="#dimen/appbar_padding_top"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:layout_scrollFlags="scroll|enterAlways"
app:popupTheme="#style/AppTheme.PopupOverlay">
</android.support.v7.widget.Toolbar>
</android.support.design.widget.AppBarLayout>
<android.support.v7.widget.RecyclerView
android:id="#+id/exerciseList"
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:layout_marginBottom="20dp"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</LinearLayout>
</android.support.design.widget.CoordinatorLayout>
exercise_item.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="10dp"
android:paddingBottom="10dp"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:weightSum="1">
<TextView
android:id="#+id/txtExName"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Whatever" />
<TextView
android:id="#+id/txtExDiff"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#color/colorDifEasy"
android:paddingBottom="6dp"
android:paddingLeft="16dp"
android:paddingRight="16dp"
android:paddingTop="6dp"
android:text="Leicht"
android:textSize="10sp" />
</LinearLayout>
Thanks a lot!
I don't see UserListActivity calling setContentView()
Either put this code inside ExersiceList Activity
RecyclerView rvContacts = (RecyclerView) findViewById(R.id.exerciseList);
exerciseBlocks = ExerciseBlock.createContactsList(20);
ExerciseBlockAdapter adapter = new ExerciseBlockAdapter(this, exerciseBlocks);
rvContacts.setAdapter(adapter);
rvContacts.setLayoutManager(new LinearLayoutManager(this));
or call setContentView(R.layout.activity_exercise_layout) on Your UserListActivity
Hello guys im new to android dev and im having an unknown error with my code,i finished the code but when i run it sends me back to "dataprovider". can anyone please help me?
My fragment.
import android.os.Bundle;
import android.support.v4.app.ListFragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListView;
public class Places_Fragment extends ListFragment {
ListView listView;
int[] images ={R.drawable.cake_1,R.drawable.cake_2,R.drawable.cake_3,R.drawable.cake_4,R.drawable.cake_5,R.drawable.cake_6};
String[] places;
PlaceAdapter adapter;
public static Places_Fragment newInstance() {
Places_Fragment fragment = new Places_Fragment();
return fragment;
}
public Places_Fragment() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View rootView = inflater.inflate(R.layout.fragment_places_, container, false);
listView =(ListView)rootView .findViewById(R.id.listView);
places = getResources().getStringArray(R.array.places);
int i=0;
adapter = new PlaceAdapter(getActivity(),R.layout.row_layout);
listView.setAdapter(adapter);
for(String item: places)
{
PlaceDataProvider dataProvider = new PlaceDataProvider(images[i],places[i]);
adapter.add(dataProvider);
i++;
}
return rootView;
}
}
My custom Adapter.
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.List;
/**
* Created by Bonfire-ADv on 4/23/2016.
*/
public class PlaceAdapter extends ArrayAdapter {
List list =new ArrayList();
public PlaceAdapter(Context context, int resource) {
super(context, resource);
}
static class DataHandler
{
ImageView images;
TextView Places;
}
#Override
public void add(Object object) {
super.add(object);
list.add(object);
}
#Override
public int getCount() {
return this.list.size();
}
#Override
public Object getItem(int position) {
return this.list.get(position);
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View row;
row = convertView;
DataHandler handler;
if (convertView== null)
{
LayoutInflater inflater = (LayoutInflater) this.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = inflater.inflate (R.layout.row_layout, parent, false);
handler = new DataHandler();
handler.images = (ImageView) row.findViewById(R.id.image_view);
handler.Places = (TextView) row.findViewById(R.id.place_title);
row.setTag(handler);
}
else
{
handler = (DataHandler) row.getTag();
}
PlaceDataProvider dataProvider;
dataProvider = (PlaceDataProvider) this.getItem(position);
handler.images.setImageResource(dataProvider.getImages());
handler.Places.setText(dataProvider.getPlaces());
return row;
}
}
My dataprovider.
package com.selfstudios.cakeplanet;
public class PlaceDataProvider {
private int images;
private String places;
public PlaceDataProvider(int images,String places)
{
this.setImages(images);
this.setPlaces(places);
}
public int getImages() {
return images;
}
public void setImages(int images) {
this.images = images;
}
public String getPlaces() {
return places;
}
public void setPlaces(String places) {
this.places = places;
}
}
my frag xml.
<LinearLayout 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"
tools:context="com.selfstudios.cakeplanet.Places_Fragment">
<!-- TODO: Update blank fragment layout -->
<ListView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/listView"
android:layout_weight="1" />
</LinearLayout>
my row xml.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_height="80dp">
<ImageView
android:layout_width="100dp"
android:layout_height="75dp"
android:id="#+id/image_view"
android:layout_alignParentStart="true"
android:layout_alignParentLeft="true"
android:paddingStart="2dp"
android:paddingLeft="2dp"
android:paddingEnd="2dp"
android:src="#drawable/cake_1"
/>
<TextView
android:id="#+id/place_title"
android:layout_width="175dp"
android:layout_height="75dp"
android:text="place name"
android:gravity="center"
android:layout_alignParentTop="false"
android:layout_centerHorizontal="true"
/>
<View
android:layout_width="match_parent"
android:layout_height="2dp"
android:background="#color/colorPrimaryDark"
android:layout_alignBottom="#+id/image_view">
</View>
</RelativeLayout>
Try replacing
for(String item: places)
with the more traditional
for(int i; i < places.size(); i++
I'm trying to inflate a RecyclerView which has as StaggeredGrid Layout, but it is not showing anything. I've pretty much copied previous code I've used before for the RecyclerView so I'm kind of stumped.
In MuseumStoriesViewHolder.onCreateViewHolder() the return of holder has the following value ViewHolder{337ec22b position=-1 id=-1, oldPos=-1, pLpos:-1 unboundundefined adapter position no parent} I'm not sure if this is realated, but it was something that seemed off to me.
It also might help to know that the fragment I'm inflating this RecyclerView is a nested Fragment.
Any help would be greatly appreciated.
MuseumFragment
package com.example.android.radiobuttontestproject.fragments;
import android.app.Activity;
import android.os.Bundle;
import android.app.Fragment;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.StaggeredGridLayoutManager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.example.android.radiobuttontestproject.R;
import com.example.android.radiobuttontestproject.adapters.MuseumStoriesAdapter;
import com.example.android.radiobuttontestproject.helpers.pojo.StoryObject;
import com.example.android.radiobuttontestproject.test.SampleDataFactory;
import java.util.List;
import butterknife.Bind;
import butterknife.ButterKnife;
public class MuseumFragment extends Fragment {
private List<StoryObject> storyObjectList;
private StaggeredGridLayoutManager storyGridLayoutManager;
private MuseumStoriesAdapter storyAdapter;
#Bind(R.id.stories_recycler_view) RecyclerView storiesRecyclerView;
public static MuseumFragment newInstance() {
MuseumFragment fragment = new MuseumFragment();
Bundle args = new Bundle();
fragment.setArguments(args);
return fragment;
}
public MuseumFragment() {
// Required empty public constructor
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_museum, container, false);
ButterKnife.bind(this, view);
//Sets up the stories
SampleDataFactory sampleDataFactory = new SampleDataFactory();
storyObjectList = sampleDataFactory.getSampleStories(
getResources().getStringArray(R.array.test_titles_for_grid_museum1),
getResources().getStringArray(R.array.test_desc_for_grid_museum1));
storyGridLayoutManager = new StaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL);
storiesRecyclerView.setLayoutManager(storyGridLayoutManager);
storyAdapter = new MuseumStoriesAdapter(getActivity().getApplicationContext(), storyObjectList);
storiesRecyclerView.setAdapter(storyAdapter);
return view;
}
#Override
public void onAttach(Activity activity) {
super.onAttach(activity);
}
#Override
public void onDetach() {
super.onDetach();
}
}
MuseumStoriesAdapter
package com.example.android.radiobuttontestproject.adapters;
import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import android.widget.Toast;
import com.example.android.radiobuttontestproject.R;
import com.example.android.radiobuttontestproject.helpers.pojo.StoryObject;
import java.util.List;
public class MuseumStoriesAdapter extends RecyclerView.Adapter<MuseumStoriesAdapter.MuseumStoriesViewHolder> {
private List<StoryObject> itemList;
private LayoutInflater inflater;
private Context context;
public MuseumStoriesAdapter(Context context, List<StoryObject> itemList) {
this.itemList = itemList;
this.context = context;
inflater = LayoutInflater.from(this.context);
}
#Override
public MuseumStoriesViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
View view = inflater.inflate(R.layout.view_box_small, viewGroup, false);
MuseumStoriesViewHolder holder = new MuseumStoriesViewHolder(view);
return holder;
}
#Override
public void onBindViewHolder(MuseumStoriesViewHolder holder, int position) {
holder.title.setText(itemList.get(position).getTitle());
holder.desc.setText(itemList.get(position).getDescription());
}
#Override
public int getItemCount() {
return itemList.size();
}
class MuseumStoriesViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
public TextView type,title,desc;
public MuseumStoriesViewHolder(View itemView) {
super(itemView);
//Tried Butterknife, but it doesn't seem like it was working in the view holder. - Peter
type = (TextView) itemView.findViewById(R.id.small_box_type);
title = (TextView) itemView.findViewById(R.id.small_box_title);
desc = (TextView) itemView.findViewById(R.id.small_box_desc);
itemView.setOnClickListener(this);
}
#Override
public void onClick(View view) {
Toast.makeText(view.getContext(), "Clicked Position = " + getPosition(), Toast.LENGTH_SHORT).show();
}
}
}
fragment_museum.xml
<ScrollView
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"
tools:context="com.example.android.radiobuttontestproject.fragments.MuseumFragment">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:weightSum="1">
<TextView
android:id="#+id/museum_header"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="#dimen/header_margin"
android:gravity="center"
android:textSize="#dimen/font_larger"
android:text="#string/museum_header" />
<android.support.v7.widget.RecyclerView
android:id="#+id/stories_recycler_view"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
</ScrollView>
view_box_small.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="wrap_content"
android:layout_margin="#dimen/small_box_margin"
android:background="#color/small_box_background_color">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<!--TODO Make layout_height wrap contenet -->
<ImageView
android:layout_width="match_parent"
android:layout_height="120dp"
android:background="#color/test_color2"/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right"
android:src="#drawable/abc_btn_rating_star_off_mtrl_alpha"
/>
</FrameLayout>
<TextView
android:id="#+id/small_box_type"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="#dimen/font_small"
android:textColor="#color/font_red"
android:text="Object"
/>
<TextView
android:id="#+id/small_box_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="#dimen/font_large"
android:textColor="#color/font_black"
android:text="Sample Text Here"
/>
<TextView
android:id="#+id/small_box_desc"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="#dimen/font_normal"
android:textColor="#color/font_black"
android:textStyle="italic"
android:text="Sample Text Here"
/>
</LinearLayout>