Question

我想使用自动完成功能创建一个带有eclipse的Android应用程序并显示带有解释页面的结果。这是我的第一次尝试。我仍然是这样的人，非常需要帮助！

我从codeofninja.com（https://www.codeofaninja.com/2013/11/android-autocompletetextview-example-sqlite-database.html）

获取示例源代码

这个项目包含5个java文件和1个xml文件;

activity_main.xml，MainActivity.java，CustomAutoCompleteView.java，DatabaseHandler.java，CustomAutoCompleteTextChangedListener.java，MyObject.java

我的问题是如何根据此示例源创建代码以显示结果。我的意思是，当我们搜索＆＃34; Cofee＆＃34;然后结果出现了，我们可以触摸＆＃34; Cofee＆＃34;并获得有关它的信息，如移动应用程序上的字典。

谢谢！

这个MainActivity.Java的源代码：

package com.example.autocompletetextviewdb;

import java.util.List;

import android.os.Bundle;
import android.app.Activity;
import android.widget.ArrayAdapter;

public class MainActivity extends Activity {

    /*
     * Change to type CustomAutoCompleteView instead of AutoCompleteTextView 
     * since we are extending to customize the view and disable filter
     * The same with the XML view, type will be CustomAutoCompleteView
     */
    CustomAutoCompleteView myAutoComplete;

    // adapter for auto-complete
    ArrayAdapter<String> myAdapter;

    // for database operations
    DatabaseHandler databaseH;

    // just to add some initial value
    String[] item = new String[] {"Please search..."};

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        try{

            // instantiate database handler
            databaseH = new DatabaseHandler(MainActivity.this);

            // put sample data to database
            insertSampleData();

            // autocompletetextview is in activity_main.xml
            myAutoComplete = (CustomAutoCompleteView) findViewById(R.id.myautocomplete);

            // add the listener so it will tries to suggest while the user types
            myAutoComplete.addTextChangedListener(new CustomAutoCompleteTextChangedListener(this));

            // set our adapter
            myAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_dropdown_item_1line, item);
            myAutoComplete.setAdapter(myAdapter);

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

    public void insertSampleData(){

        // CREATE
        databaseH.create( new MyObject("January") );
        databaseH.create( new MyObject("February") ); 
        databaseH.create( new MyObject("March") );
        databaseH.create( new MyObject("April") );
        databaseH.create( new MyObject("May") );
        databaseH.create( new MyObject("June") );
        databaseH.create( new MyObject("July") );
        databaseH.create( new MyObject("August") );
        databaseH.create( new MyObject("September") );
        databaseH.create( new MyObject("October") );
        databaseH.create( new MyObject("November") );
        databaseH.create( new MyObject("December") );
        databaseH.create( new MyObject("New Caledonia") ); 
        databaseH.create( new MyObject("New Zealand") );
        databaseH.create( new MyObject("Papua New Guinea") );
        databaseH.create( new MyObject("COFFEE-1K") );
        databaseH.create( new MyObject("coffee raw") );
        databaseH.create( new MyObject("authentic COFFEE") );
        databaseH.create( new MyObject("k12-coffee") );
        databaseH.create( new MyObject("view coffee") );
        databaseH.create( new MyObject("Indian-coffee-two") );

    }

    // this function is used in CustomAutoCompleteTextChangedListener.java
    public String[] getItemsFromDb(String searchTerm){

        // add items on the array dynamically
        List<MyObject> products = databaseH.read(searchTerm);
        int rowCount = products.size();

        String[] item = new String[rowCount];
        int x = 0;

        for (MyObject record : products) {

            item[x] = record.objectName;
            x++;
        }

        return item;
    }

}

Answer 1

如果您要处理用户从下拉列表中选择其中一个建议而产生的点击，则必须使用以下内容：

actextView.setOnItemSelectedListener(new OnItemClickListener() { 
    @Override 
    public void onItemClick (AdapterView<?> parent, View view, int position, long id) {
        //... your stuff 
    } 
});

来源：how to set setOnClickListener for AutoCompleteTextView?

基于Android的AutoCompleteTextView点击事件来自代码

1 个答案: