java - 如何单击 AutocompleteTextView 列表上的事件并查询 sqlite。(我有一个示例代码。)

Question

如何单击 AutocompleteTextView 上的数据库列表并将值发送到查询 sqlite 数据库。现在我可以使用 AutocompleteTextView 来显示数据，当我单击它时将显示 Toast。请帮我。这对我来说非常重要。抱歉我的英语不好。

这是我的代码。

myDBClass.java

package com.myapp;


import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;

public class myDBClass extends SQLiteOpenHelper {
	

    // Database Version
    private static final int DATABASE_VERSION = 1;
 
    // Database Name
    private static final String DATABASE_NAME = "mydatabase";
 
    // Table Name
    private static final String TABLE_GALLERY = "gallery";

	public myDBClass(Context context) {
		super(context, DATABASE_NAME, null, DATABASE_VERSION);
		// TODO Auto-generated constructor stub
	}

	@Override
	public void onCreate(SQLiteDatabase db) {
		// TODO Auto-generated method stub
		// Create Table Name
	    db.execSQL("CREATE TABLE " + TABLE_GALLERY + 
		          "(GalleryID INTEGER PRIMARY KEY AUTOINCREMENT," +
		          " Name TEXT(100)," +
		          " Path TEXT(100));");
	   
	    Log.d("CREATE TABLE","Create Table Successfully.");
	}	
	
	
	// Insert Data
	public long InsertData(String strGalleryID, String strName, String strPath) {
		// TODO Auto-generated method stub
		
		 try {
			SQLiteDatabase db;
     		db = this.getWritableDatabase(); // Write Data
     		
     		/**
     		 *  for API 11 and above
			SQLiteStatement insertCmd;
			String strSQL = "INSERT INTO " + TABLE_GALLERY
					+ "(GalleryID,Name,Path) VALUES (?,?,?)";
			
			insertCmd = db.compileStatement(strSQL);
			insertCmd.bindString(1, strGalleryID);
			insertCmd.bindString(2, strName);
			insertCmd.bindString(3, strPath);
			return insertCmd.executeInsert();
			*/
			
     	   ContentValues Val = new ContentValues();
     	   Val.put("GalleryID", strGalleryID); 
     	   Val.put("Name", strName);
     	   Val.put("Path", strPath);
    
			long rows = db.insert(TABLE_GALLERY, null, Val);

			db.close();
			return rows; // return rows inserted.
           
		 } catch (Exception e) {
		    return -1;
		 }

	}
	
	// Select All Data
	public String[] SelectAllData() {
		// TODO Auto-generated method stub
		
		 try {
			String arrData[] = null;	
			 SQLiteDatabase db;
			 db = this.getReadableDatabase(); // Read Data
				
			 String strSQL = "SELECT  NAME FROM " + TABLE_GALLERY;
			 Cursor cursor = db.rawQuery(strSQL, null);
			 
			 	if(cursor != null)
			 	{
					if (cursor.moveToFirst()) {
						arrData = new String[cursor.getCount()];
						/***
						 *  [x] = Name
						 */
						int i= 0;
						do {				
							arrData[i] = cursor.getString(0);
							i++;
						} while (cursor.moveToNext());						

					}
			 	}
			 	cursor.close();
				
				return arrData;
				
		 } catch (Exception e) {
		    return null;
		 }

	}
	
	
	@Override
	public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
		// TODO Auto-generated method stub
        db.execSQL("DROP TABLE IF EXISTS " + TABLE_GALLERY);
        
        // Re Create on method  onCreate
        onCreate(db);
	}

}

MainActivity.java

package com.myapp;

import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
import android.widget.Button;
import android.widget.Toast;
import android.app.Activity;


public class MainActivity extends Activity {
	  
   
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
		// get Data from SQLite
		final myDBClass myDb = new myDBClass(this);
		/*
		 * for insert statement
		myDb.InsertData("1","Picture 1", "pic_a.png");
		myDb.InsertData("2","Picture 2", "pic_b.png");
		myDb.InsertData("3","Picture 3", "pic_c.png");
		myDb.InsertData("4","Picture 4", "pic_d.png");
		myDb.InsertData("5","Picture 5", "pic_e.png");
		myDb.InsertData("6","Picture 6", "pic_f.png");
		myDb.InsertData("7","Picture 7", "pic_g.png");
		myDb.InsertData("8","Picture 8", "pic_h.png");
		myDb.InsertData("9","Picture 9", "pic_i.png");
		*/
		final String [] myData = myDb.SelectAllData();   
		
        // autoCompleteTextView1
        final AutoCompleteTextView autoCom = (AutoCompleteTextView)findViewById(R.id.autoCompleteTextView1);
        
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
                android.R.layout.simple_dropdown_item_1line, myData);
        
        autoCom.setAdapter(adapter);
        
        // button1
        final Button btn1 = (Button)findViewById(R.id.button1);  
        btn1.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
    			Toast.makeText(MainActivity.this,
        				String.valueOf("Your Input : " + autoCom.getText().toString()),
        					Toast.LENGTH_SHORT).show();
            }
        });    
        
   
    } 
    
    
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }

}

Answer 1

在点击事件上使用它

        add.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            myDb.InsertData(actv.getText().toString());

        }
    });