Question

String[] cities= {"Madrid","Barcelona","Valencia","Seville","Zaragoza","Malaga","Murcia","Palma"}

如何使用edittext过滤此字符串数组。例如，我将在edittext中输入“ma”。然后;字符串数组将像这样过滤（或创建新的字符串数组）;

String[] cities= {"Madrid","Malaga","Palma"}

你能帮我吗？感谢。

Answer 1

Android编程无法更改json，但通过编程，您可以按照自己的意愿进行操作。

首先，您必须将所有JSON值存储到POJO，并且通过RecyclerView或ListView可以获得相同的值。

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

   public void afterTextChanged(Editable s) {
   }

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

   public void onTextChanged(CharSequence s, int start, 
     int before, int count) {

   }
  });

Answer 2

        String[] cities= {"Madrid","Barcelona","Valencia","Seville","Zaragoza",
                          "Malaga","Murcia","Palma"}
        String[] resultCities=null;

        editTextSearch.addTextChangedListener(new TextWatcher() {

               @Override
               public void afterTextChanged(Editable s) {
               resultCities = search(editTextSearch.getText().toString())
               }

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

               @Override    
               public void onTextChanged(CharSequence s, int start,
                 int before, int count) {

               }
              });

              public String[] search(String txtsearch) {
                        String arr[]=null;
                        int pos=0;
                        for (int i = 0; i < cities.length; i++) {

                            if(cities[i].contains(txtsearch)){
                                arr[pos]=cities[i];
                                pos++;
                            }
                        }
                        return arr;
                    }

Answer 3

为此使用AutoCompleteTextView。例如：

在您的布局xml中：

 <AutoCompleteTextView
    android:id="@+id/autoCompleteTextView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_below="@+id/textView"
    android:layout_marginLeft="36dp"
    android:layout_marginTop="17dp"
    android:ems="10"
    android:text="">

    <requestFocus />
</AutoCompleteTextView>

并在您的活动/片段中

public class MainActivity  extends AppCompatActivity {
String[] cities= {"Madrid","Barcelona","Valencia","Seville","Zaragoza","Malaga","Murcia","Palma"}
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    //Creating the instance of ArrayAdapter containing list of fruit names
    ArrayAdapter<String> adapter = new ArrayAdapter<String>
            (this, android.R.layout.select_dialog_item, cities);
    //Getting the instance of AutoCompleteTextView
    AutoCompleteTextView actv = (AutoCompleteTextView) findViewById(R.id.autoCompleteTextView);
    actv.setThreshold(1);//will start working from first character
    actv.setAdapter(adapter);//setting the adapter data into the AutoCompleteTextView
    actv.setTextColor(Color.RED);
}

}

Answer 4

将数组转换为list并使用它：

editText.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {

        }

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {
            if(!s.toString().isEmpty()){
                List<String> city = filterCity(clubList,s.toString());
            }

        }

        @Override
        public void afterTextChanged(Editable s) {

        }
    });

public List<String>  filterCity(List<String> cities,String searchValue){
    List<String>  newCity = new ArrayList<>();
    for(String city:cities){
        if(city.contains(searchValue)){
            newCity.add(city);
        }
    }
    return newCity;

}

Answer 5

如果您使用列表/网格视图，而不是在适配器中应该添加过滤器方法，如果您在此处搜索，可以找到大量答案，我建议在适配器中使用过滤器。

使用edittext过滤字符串数组

5 个答案: