ListView帶圖像和文本文本過濾

Question

Original post： 我有一個ListView與圖像和文本和一個TextView按文本過濾行。 當我運行我的應用程序時，它不顯示圖像，而是顯示對象引用的文本。

帖子編輯： 我已經更新MainActivity.java和我添加了兩個新的類MeetingAdapter.java和MeetingFilter.java現在的問題是，根據該文本我的應用程序不過濾搜索結果

main_activity_layout。 XML

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:tools="http://schemas.android.com/tools" 
android:layout_width="fill_parent" 
android:layout_height="fill_parent" 
android:orientation="vertical" > 

<!-- Meeting name filter --> 
<EditText 
    android:id="@+id/find_meeting_name" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:hint="@string/find_meeting_name_hint" 
    android:inputType="text" /> 

<!-- Meeting list --> 
<ListView 
    android:id="@+id/meeting_name_list" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" /> 

meeting_list_item.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:orientation="horizontal" > 

<!-- Meeting image --> 
<ImageView 
    android:id="@+id/meeting_image" 
    android:layout_width="48dip" 
    android:layout_height="48dip" 
    android:contentDescription="@string/meeting_image_description" /> 

<!-- Meeting name --> 
<TextView android:id="@+id/meeting_name" 
    android:layout_width="0dip" 
    android:layout_height="wrap_content" 
    android:layout_gravity="center_vertical" 
    android:layout_weight="1.0" 
    android:textIsSelectable="true" 
    android:textSize="12sp" />  

MainActivity.java

import java.util.ArrayList; 
import java.util.Date; 

import android.app.Activity; 
import android.graphics.BitmapFactory; 
import android.os.Bundle; 
import android.text.Editable; 
import android.text.TextWatcher; 
import android.view.Menu; 
import android.widget.EditText; 
import android.widget.ListView; 

public class MainActivity extends Activity { 

    private EditText findMeetingName; 
    private MeetingAdapter meetingAdapter; 
    private ListView meetingNameList; 

    private ArrayList<Meeting> meetings; 

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

     findMeetingName = (EditText) findViewById(R.id.find_meeting_name); 
     findMeetingName.addTextChangedListener(new TextWatcher() { 

      @Override 
      public void afterTextChanged(Editable s) { 
      } 

      @Override 
      public void beforeTextChanged(CharSequence s, int start, int count, int after) { 
      } 

      @Override 
      public void onTextChanged(CharSequence charSequence, int start, int before, int count) { 
       MainActivity.this.meetingAdapter.getFilter().filter(charSequence); 
       meetingAdapter.notifyDataSetChanged(); 
      } 

     }); 

     meetings = new ArrayList<Meeting>(); 
     Meeting meeting = null; 
     for (int i = 0; i < 5; i++) { 
      meeting = new Meeting(); 
      meeting.setId(i + 1); 
      meeting.setName("Cita #" + (i + 1)); 
      meeting.setDescription("Descripción #" + (i + 1)); 
      meeting.setImage(BitmapFactory.decodeResource(getBaseContext().getResources(), R.drawable.icon48x48_1)); 
      meeting.setInitialDate(new Date()); 
      meetings.add(meeting); 
     } 

     meetingAdapter = new MeetingAdapter(this, meetings); 
     meetingNameList = (ListView) findViewById(R.id.meeting_name_list); 
     meetingNameList.setAdapter(meetingAdapter); 

    } 

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

MeetingAdapter.java

import java.util.ArrayList; 

import android.app.Activity; 
import android.content.Context; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.BaseAdapter; 
import android.widget.Filter; 
import android.widget.Filterable; 
import android.widget.ImageView; 
import android.widget.TextView; 

public class MeetingAdapter extends BaseAdapter implements Filterable { 

    LayoutInflater inflater; 
    ArrayList<Meeting> meetings; 

    public MeetingAdapter(Activity activity, ArrayList<Meeting> meetings) { 
     this.meetings = meetings; 
     inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
    } 

    @Override 
    public int getCount() { 
     return meetings.size(); 
    } 

    @Override 
    public Object getItem(int position) { 
     return meetings.get(position); 
    } 

    @Override 
    public long getItemId(int position) { 
     return position; 
    } 

    @Override 
    public View getView(int position, View convertView, ViewGroup mainViewGroup) { 
     View mRow = inflater.inflate(R.layout.meeting_list_item, mainViewGroup, false); 

     // Se setean los valores para cada componente de la lista 
     TextView meetingName = (TextView) mRow.findViewById(R.id.meeting_name); 
     meetingName.setText(meetings.get(position).getName()); 
     ImageView meetingImage = (ImageView) mRow.findViewById(R.id.meeting_image); 
     meetingImage.setImageBitmap(meetings.get(position).getImage()); 

     return mRow; 
    } 

    @Override 
    public Filter getFilter() { 
     MeetingFilter filter = new MeetingFilter(meetings); 
     return filter; 
    } 

} 

MeetingFilter.java

import java.util.ArrayList; 

import android.widget.Filter; 

public class MeetingFilter extends Filter { 

    //MeetingAdapter meetingAdapter; 
    ArrayList<Meeting> meetings; 

    public MeetingFilter(ArrayList<Meeting> meetings){ 
     //this.meetingAdapter = meetingAdapter; 
     this.meetings = meetings; 
    } 

    @Override 
    protected FilterResults performFiltering(CharSequence constraint) { 
     FilterResults filteredResults = new FilterResults(); 
     if(constraint.length() == 0) { 
      filteredResults.values = meetings; 
      filteredResults.count = meetings.size(); 
      return filteredResults; 
     } 

     ArrayList<Meeting> filteredMeetings = new ArrayList<Meeting>(); 
     for (Meeting meeting : meetings) { 
      // TODO Revisar problemas de internacionalización 
      if(meeting.getName().toLowerCase().contains(constraint.toString().toLowerCase())) { 
       filteredMeetings.add(meeting); 
      } 
     } 
     filteredResults.values = filteredMeetings; 
     filteredResults.count = filteredMeetings.size(); 

     return filteredResults; 
    } 

    @Override 
    protected void publishResults(CharSequence constraint, FilterResults results) { 
     meetings = (ArrayList<Meeting>) results.values; 
     //meetingAdapter.notifyDataSetChanged(); 
    } 

} 

Meeting.java

import java.util.Date; 

import android.graphics.Bitmap; 

public class Meeting { 

    private int id; 

    private String name; 

    private String description; 

    private Bitmap image; 

    private Date initialDate; 

    public int getId() { 
     return id; 
    } 

    public void setId(int id) { 
     this.id = id; 
    } 

    public String getName() { 
     return name; 
    } 

    public void setName(String name) { 
     this.name = name; 
    } 

    public String getDescription() { 
     return description; 
    } 

    public void setDescription(String description) { 
     this.description = description; 
    } 

    public Bitmap getImage() { 
     return image; 
    } 

    public void setImage(Bitmap image) { 
     this.image = image; 
    } 

    public Date getInitialDate() { 
     return initialDate; 
    } 

    public void setInitialDate(Date initialDate) { 
     this.initialDate = initialDate; 
    } 

} 

我

Answer 1

正如@Pragnani上面提到的，你需要創建一個這樣的自定義適配器：

public class customAdapter extends BaseAdapter 
{ 
    public int getCount() 
    { 
     return list.length; 
    } 

    public Object getItem(int itemData) 
    { 
     return null; 
    } 

    public long getItemId(int itemPosition) 
    { 
     return itemPosition; 
    } 

    public View getView(int position, View mainView, ViewGroup mainViewGroup) 
    { 
     LayoutInflater maniInFlater = getLayoutInflater(); 
     View mRow = maniInFlater.inflate(R.layout.yourlayout_layout, mainViewGroup, false); 
     TextView sampleText = (TextView) mRow.findViewById(R.id.sample_id); 
     return mRow; 
    } 
} 

然後設置這是您的ListView適配器：

lv.setAdapter(new customAdapter()); 

Answer 2

因爲你只使用TextView您ArrayAdapter 即

arrayAdapter = new ArrayAdapter<Meeting>(this, R.layout.meeting_list_item, R.id.meeting_name, meetings); 

您正在嘗試只打印會議名稱在TextView中，ArrayAdapter會將TextView作爲資源填充列表中的數據。 所以try to take a custom Adapter which extends ArrayAdapter or Base Adapter或者乾脆使用SimpleAdapter