在Android中未調用AutoCompleteTextView的自定義ArrayAdapter getView？

Question

我想使用AutoCompleteTextView使用自定義ArrayAdapter。我決定使用Arrayadapter。

但是在我的自定義ArrayAdaptergetView()未被調用，AutoCompleteTextView未由適配器設置。

下面一個可以看到我試過到目前爲止：

MainActivity.java：

public class MainActivity extends AppCompatActivity { 

    AutoCompleteTextView text; 

    String[] languages = { "Android ", "java", "IOS", "SQL", "JDBC", "Web services" }; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     Names[] names = this.initNameArray(); 
     this.text = (AutoCompleteTextView) findViewById(R.id.autoCompleteTextView1); 
     this.text.setThreshold(1); 
     adapter adapter = new adapter(this, R.layout.recent_text, names); 

     this.text.setAdapter(adapter); 

    } 

    private Names[] initNameArray() { 

     Names[] recent_search = new Names[this.languages.length]; 
     int i = 0; 
     for (String s : this.languages) { 
      Names names = new Names(); 
      names.setName(s); 
      recent_search[i++] = names; 
     } 

     return recent_search; 
    } 
    // custom adapter 

    public class adapter extends ArrayAdapter<Names> { 
     Names names[]; 
     Context context; 
     int  layoutResourceId; 

     public adapter(Context context, int resource, Names[] objects) { 
      super(context, resource, objects); 
      this.names = objects; 
      this.context = context; 
      this.layoutResourceId = resource; 
     } 

     @Override 
     public int getCount() { 
      return this.names.length; 
     } 

     @Override 
     public Names getItem(int position) { 
      return this.names[position]; 
     } 

     @Override 
     public View getView(int position, View convertView, ViewGroup parent) { 
      try { 
       /* 
       * The convertView argument is essentially a "ScrapView" as 
       * described is Lucas post 
       * http://lucasr.org/2012/04/05/performance-tips-for-androids- 
       * listview/ It will have a non-null value when ListView is 
       * asking you recycle the row layout. So, when convertView is 
       * not null, you should simply update its contents instead of 
       * inflating a new row layout. 
       */ 
       if (convertView == null) { 
        // inflate the layout 
        LayoutInflater inflater = (LayoutInflater) ((this.context)) 
          .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
        convertView = inflater.inflate(this.layoutResourceId, parent, false); 
       } 

       // object item based on the position 
       Names objectItem = this.getItem(position); 

       // get the TextView and then set the text (item name) and tag 
       // (item ID) values 
       TextView textViewItem = (TextView) convertView.findViewById(R.id.recent_search); 
       textViewItem.setText(objectItem.getName()); 

       // in case you want to add some style, you can do something 
       // like: 
       textViewItem.setBackgroundColor(Color.CYAN); 

      } catch (NullPointerException e) { 
       e.printStackTrace(); 
      } catch (Exception e) { 
       e.printStackTrace(); 
      } 
      return convertView; 
     } 
    } 

    // my pojo class 
    public class Names { 
     String name; 

     public String getName() { 
      return this.name; 
     } 

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

Answer 1

下面的代碼：

public class MainActivity extends AppCompatActivity { 

    AutoCompleteTextView text; 

    String[] languages = {"Android ", "java", "IOS", "SQL", "JDBC", "Web services"}; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     List<Names> names = initNameArray(); 
     text = (AutoCompleteTextView) findViewById(R.id.autocompleteTvId); 
     text.setThreshold(1); 
     CustomArrayAdapter adapter = new CustomArrayAdapter(this, R.layout.recent_text, names); 

     text.setAdapter(adapter); 
    } 

    private List<Names> initNameArray() { 

     List<Names> recent_search = new ArrayList<>(); 
     int i = 0; 
     for (String s : languages) { 
      Names names = new Names(); 
      names.setName(s); 
      recent_search.add(i++, names); 
     } 

     return recent_search; 
    } 
    //custom CustomArrayAdapter 

    public class CustomArrayAdapter extends ArrayAdapter<Names> { 
     List<Names> names; 
     Context context; 
     int layoutResourceId; 

     public CustomArrayAdapter(Context context, int resource, List<Names> objects) { 
      super(context, resource, objects); 
      names = objects; 
      this.context = context; 
      layoutResourceId = resource; 
     } 


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

     @Override 
     public Names getItem(int position) { 
      return names.get(position); 
     } 

     @Override 
     public View getView(int position, View convertView, ViewGroup parent) { 
      try { 

      /* 
      * The convertView argument is essentially a "ScrapView" as described is Lucas post 
      * http://lucasr.org/2012/04/05/performance-tips-for-androids-listview/ 
      * It will have a non-null value when ListView is asking you recycle the row layout. 
      * So, when convertView is not null, you should simply update its contents instead of inflating a new row layout. 
      */ 
       if (convertView == null) { 
        // inflate the layout 
        LayoutInflater inflater = (LayoutInflater) ((context)).getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
        convertView = inflater.inflate(layoutResourceId, parent, false); 
       } 

       // object item based on the position 
       Names objectItem = getItem(position); 

       // get the TextView and then set the text (item name) and tag (item ID) values 
       TextView textViewItem = (TextView) convertView.findViewById(R.id.tv_recent_text); 
       textViewItem.setText(objectItem.getName()); 

       // in case you want to add some style, you can do something like: 
       textViewItem.setBackgroundColor(Color.CYAN); 

      } catch (NullPointerException e) { 
       e.printStackTrace(); 
      } catch (Exception e) { 
       e.printStackTrace(); 
      } 
      return convertView; 
     } 
    } 

    //my pojo class 

    public class Names { 
     String name; 

     public String getName() { 
      return name; 
     } 

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

}

應該只是罰款你。與代碼唯一的區別是List而不是數組。爲了使其工作，刪除hello world並啓動類型'An'，'Ja'等。