RecycleView只顯示第一項

這裏是問題：我創建了世界上最簡單的RecyclerView，但它只顯示第一項。我不明白爲什麼。謝謝你的幫助。RecycleView只顯示第一項

item_layout.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="match_parent"> 

    <TextView 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:id="@+id/tv_detail"/> 
</RelativeLayout>

activity_main.xml中

<?xml version="1.0" encoding="utf-8"?> 
<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="com.bcit.moonlady.testrecycler.MainActivity"> 

    <TextView 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="Hello World!" 
     android:id="@+id/tv_hello"/> 

    <android.support.v7.widget.RecyclerView 
     android:layout_width="match_parent" 
     android:layout_height="300dp" 
     android:id="@+id/rv_details" 
     android:layout_below="@+id/tv_hello"/> 
</RelativeLayout>

MainActivity.java

package com.bcit.moonlady.testrecycler; 

import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.support.v7.widget.LinearLayoutManager; 
import android.support.v7.widget.RecyclerView; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.TextView; 

public class MainActivity extends AppCompatActivity { 
    String[] data = {"test1", "test2", "test3"}; 

    RecyclerView mRecView; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     mRecView = (RecyclerView)findViewById(R.id.rv_details); 
     mRecView.setHasFixedSize(true); 
     mRecView.setLayoutManager(new LinearLayoutManager(getApplicationContext())); 
     mRecView.setAdapter(new DetailAdapter()); 
    } 

    private class DetailView extends RecyclerView.ViewHolder { 
     TextView mTextView; 

     public DetailView(View itemView) { 
      super(itemView); 
      mTextView = (TextView)itemView.findViewById(R.id.tv_detail); 
     } 

     public void bindView(String string) { 
      mTextView.setText(string); 
     } 
    } 

    private class DetailAdapter extends RecyclerView.Adapter<DetailView> { 
     @Override 
     public DetailView onCreateViewHolder(ViewGroup parent, int viewType)   { 
      LayoutInflater layoutInflater = LayoutInflater.from(parent.getContext()); 
      View v = layoutInflater.inflate(R.layout.item_layout, parent, false); 
      return new DetailView(v); 
     } 

     @Override 
     public void onBindViewHolder(DetailView holder, int position) { 
      String string = data[position]; 
      holder.bindView(string); 
     } 

     @Override 
     public int getItemCount() { 
      return data.length; 
     } 
    } 
}

來源

2016-03-10 moonlady16

'mRecView.setLayoutManager（新LinearLayoutManager（getApplicationContext（）））;'爲什麼你傳遞應用程序上下文來佈局管理器？ – Bhargav

我認爲你的recycleview佈局沒有填滿3項從上到下 – GiapLee

http://javatechig.com/android/android-recyclerview-example請參考這個鏈接。它可能會幫助你 –

首先up，你應該把你的Recyclerview.veiwholder類放在適配器中，以確保你得到相同的實例。

//replaces contents of a view, invoked by the layout manager 
@Override public void onBindViewHolder(ViewHolder holder, int position) { 
// get the message to display from the array at the specified position 
// replace contents of the view with the new element 
holder.mytextview.setText(recieveHistory.get(position)); 
}

來源

2016-03-10 03:53:22 deefunkt

基本上，你不允許recyclerView回收它的視圖，因爲你靜態分配TextView的ID然後設置一個字符串。 – deefunkt

對不起，我不確定我是否理解你的觀點。 – moonlady16

你需要改變你的item_layout高度WRAP_CONTENT 如果您使用的是Android的支持庫v 23.2.0

<?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="wrap_content"> 

    <TextView 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:id="@+id/tv_detail"/> 
</RelativeLayout>

來源

2016-03-10 04:35:37 ramji

工作。非常感謝！ – moonlady16

也爲我工作。使用支持庫23.4.0 – X09

感謝您的指導，我犯了與moonlady16一樣的錯誤。 –

活動：

import android.os.Bundle; 
import android.support.design.widget.FloatingActionButton; 
import android.support.design.widget.Snackbar; 
import android.support.v7.app.AppCompatActivity; 
import android.support.v7.widget.LinearLayoutManager; 
import android.support.v7.widget.RecyclerView; 
import android.support.v7.widget.Toolbar; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.ViewGroup; 
import android.widget.TextView; 

public class MainActivity extends AppCompatActivity { 
private RecyclerView mRecycler; 
String[] data = {"test1", "test2", "test3"}; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 

    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); 
    setSupportActionBar(toolbar); 

    mRecycler = (RecyclerView) findViewById(R.id.rv_details); 
    DetailAdapter adapter = new DetailAdapter(); 
    LinearLayoutManager manager = new LinearLayoutManager(this); 
    mRecycler.setHasFixedSize(true); 
    mRecycler.setLayoutManager(manager); 
    mRecycler.setAdapter(adapter); 

    FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab); 
    fab.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View view) { 
      Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG) 
        .setAction("Action", null).show(); 
     } 
    }); 
} 

@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    // Inflate the menu; this adds items to the action bar if it is present. 
    getMenuInflater().inflate(R.menu.menu_main, menu); 
    return true; 
} 

@Override 
public boolean onOptionsItemSelected(MenuItem item) { 
    // Handle action bar item clicks here. The action bar will 
    // automatically handle clicks on the Home/Up button, so long 
    // as you specify a parent activity in AndroidManifest.xml. 
    int id = item.getItemId(); 

    //noinspection SimplifiableIfStatement 
    if (id == R.id.action_settings) { 
     return true; 
    } 

    return super.onOptionsItemSelected(item); 
} 

private class DetailAdapter extends RecyclerView.Adapter<DetailAdapter.DetailView> { 

    @Override 
    public void onBindViewHolder(DetailView holder, int position) { 
     String string = data[position]; 
     holder.bindView(string); 
    } 

    @Override 
    public DetailView onCreateViewHolder(ViewGroup parent, int viewType) { 
     LayoutInflater layoutInflater = LayoutInflater.from(parent.getContext()); 
     View v = layoutInflater.inflate(R.layout.item_layout, parent, false); 
     return new DetailView(v); 
    } 

    @Override 
    public int getItemCount() { 
     return data.length; 
    } 

    class DetailView extends RecyclerView.ViewHolder { 
     TextView mTextView; 

     public DetailView(View itemView) { 
      super(itemView); 
      mTextView = (TextView)itemView.findViewById(R.id.tv_detail); 
     } 

    public void bindView(String string) { 
     mTextView.setText(string); 
    } 
} 

    } 
}

activity_main .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=".MainActivity"> 
 

 
    <android.support.design.widget.AppBarLayout android:layout_height="wrap_content" 
 
     android:layout_width="match_parent" 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:popupTheme="@style/AppTheme.PopupOverlay" /> 
 

 
    </android.support.design.widget.AppBarLayout> 
 

 
    <include layout="@layout/content_main" /> 
 

 
    <android.support.design.widget.FloatingActionButton android:id="@+id/fab" 
 
     android:layout_width="wrap_content" android:layout_height="wrap_content" 
 
     android:layout_gravity="bottom|end" android:layout_margin="@dimen/fab_margin" 
 
     android:src="@android:drawable/ic_dialog_email" /> 
 

 
</android.support.design.widget.CoordinatorLayout>

content_main.xml

<?xml version="1.0" encoding="utf-8"?> 
 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
 
    xmlns:tools="http://schemas.android.com/tools" 
 
    xmlns:app="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" 
 
    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin" 
 
    android:paddingRight="@dimen/activity_horizontal_margin" 
 
    android:paddingTop="@dimen/activity_vertical_margin" 
 
    android:paddingBottom="@dimen/activity_vertical_margin" 
 
    app:layout_behavior="@string/appbar_scrolling_view_behavior" 
 
    tools:showIn="@layout/activity_main" tools:context=".MainActivity"> 
 

 

 

 
    <android.support.v7.widget.RecyclerView 
 
     android:layout_width="match_parent" 
 
     android:layout_height="match_parent" 
 
     android:id="@+id/rv_details" 
 
     /> 
 

 

 
</RelativeLayout>

item_layout.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="match_parent"> 
 

 
    <TextView 
 
     android:layout_width="match_parent" 
 
     android:layout_height="match_parent" 
 
     android:id="@+id/tv_detail"/> 
 

 
</RelativeLayout>

來源

2016-03-10 04:52:53

感謝您的示例 – moonlady16

@ moonlady16很高興爲您提供幫助，如果它幫助您提高了投票率並標記爲正確的答案，因爲它也可以幫助其他人。 –

它可以幫助

customAdapter = new CustomRecycleradapter(arrItems); 
recyclerView.setLayoutManager(new LinearLayoutManager(mParentActivity)); 
recyclerView.setAdapter(customAdapter); 

ArrayList<ListofItems> mSource; 
// adapter class 
public CustomRecycleradapter(ArrayList<ListofItems> source) { 
    this.mSource = source; 

} 
@Override 
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
    View view = LayoutInflater.from(parent.getContext()) 
      .inflate(R.layout.item, parent, false); 
    return new CustomHolder(view); 
} 
@Override 
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) { 
    if (holder instanceof CustomHolder) { 
     ((CustomHolder) holder).customerName.setText(mSource.get(position).getCustomerNumber()); 

    } 
} 

@Override 
public int getItemCount() { 
    return mSource.size(); 
} 

public void addItem(ArrayList<ListofItems> itemLists) { 
    mSource.addAll(itemLists); 

    notifyItemInserted(mSource.size() - 1); 
} 
public class CustomHolder extends RecyclerView.ViewHolder { 
    @Bind(R.id.customer_name) 
    TextView customerName; 
    @Bind(R.id.time_stamp) 
    TextView timeStamp; 
    @Bind(R.id.amount) 
    TextView amount; 

    public CustomHolder(View itemView) { 
     super(itemView); 
     ButterKnife.bind(this, itemView); 

    } 
}

來源

2016-03-10 06:59:51

我花了一些時間讓它運行，但我很高興我做到了;我現在知道ButterKnife。謝謝！... – moonlady16

我也做這個常見的錯誤。只要改變你的父母的LinearLayout - 高度應該是「WRAP_CONTENT」

<LinearLayout 
android:layout_width="match_parent" 
android:layout_height = "wrap_content" 
..... > 
.. 
.. 
</LinearLayout>

來源

2017-01-30 19:07:17

設置高度在item_layout.xml中的RelativeLayout的WRAP_CONTENT。

<?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="wrap_content"> 

    <TextView 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:id="@+id/tv_detail"/> 
</RelativeLayout>

來源

2017-07-18 05:02:56

RecycleView只顯示第一項

回答

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