如何在 simpleadapter 中实现 OnItemClickListener？代码删除、更新等，
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【中文标题】如何在 simpleadapter 中实现 OnItemClickListener？代码删除、更新等，【英文标题】：how to implement OnItemClickListener in simpleadapter? code delete, update etc., 【发布时间】：2017-04-16 21:58:29 【问题描述】：我想我只需要在MainActivity.java 中编码。但我不知道如何实现OnItemClickListener()。当我在两个EditTexts 中写入数据并单击插入按钮时，它会出现在listView 到simpleadapter 中。当我在listView 中选择一行并单击删除按钮时，它应该从listView 中删除。我已经编写了“插入”代码，但我不知道如何编写删除、更新、onitemclicklistener 的代码。有人知道如何编码吗？谢谢。
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="vertical"
android:layout_
android:layout_
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.eee.MainActivity">
<LinearLayout
android:orientation="horizontal"
android:layout_
android:layout_>
<EditText
android:id="@+id/eng"
android:layout_
android:layout_weight="1"
android:layout_
/>
<EditText
android:id="@+id/kor"
android:layout_
android:layout_weight="1"
android:layout_
/>
</LinearLayout>
<LinearLayout
android:orientation="horizontal"
android:layout_
android:layout_>
<Button
android:id="@+id/ins"
android:layout_
android:layout_
android:text="INS"
android:onClick="onClick"
/>
<Button
android:id="@+id/del"
android:layout_
android:layout_
android:text="DEL"
android:onClick="onClick"
/>
<Button
android:id="@+id/upd"
android:layout_
android:layout_
android:text="UPD"
android:onClick="onClick"
/>
</LinearLayout>
<ListView
android:id="@+id/list"
android:layout_
android:layout_
/>
</LinearLayout>
memberlist.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal" android:layout_
android:layout_>
<TextView
android:id="@+id/text1"
android:layout_
android:layout_
android:padding="10sp"
android:textStyle="bold" >
</TextView>
<TextView
android:id="@+id/text2"
android:layout_
android:layout_
android:padding="10sp">
</TextView>
</LinearLayout>
DBAdapter.java
public class DBAdapter
private DatabaseHelper mHelper;
private SQLiteDatabase mDb;
private static final String DATABASE_NAME = "projectdb";
private static final int DATABASE_VERSION = 1;
private static String SQL_TABLE_CREATE;
private static String TABLE_NAME;
public static final String SQL_CREATE_PROJECT =
"create table project (_id integer primary key autoincrement,"
+ " eng text not null,"
+ " kor text not null"
+ ")";
private final Context mCxt;
private static class DatabaseHelper extends SQLiteOpenHelper
public DatabaseHelper(Context context)
super(context, DATABASE_NAME, null, DATABASE_VERSION);
public DatabaseHelper(Context context, String name,
SQLiteDatabase.CursorFactory factory, int version)
super(context, name, factory, version);
// TODO Auto-generated constructor stub
@Override
public void onCreate(SQLiteDatabase db)
// TODO Auto-generated method stub
db.execSQL(SQL_TABLE_CREATE);
@Override
public void onOpen(SQLiteDatabase db)
// TODO Auto-generated method stub
super.onOpen(db);
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion)
// TODO Auto-generated method stub
db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);
onCreate(db);
public DBAdapter(Context cxt, String sql, String tableName)
this.mCxt = cxt;
SQL_TABLE_CREATE = sql;
TABLE_NAME = tableName;
public DBAdapter open() throws SQLException
mHelper = new DatabaseHelper(mCxt);
mDb = mHelper.getWritableDatabase();
return this;
public void close()
mHelper.close();
public long insertTable(ContentValues values)
return mDb.insert(TABLE_NAME, null, values);
public boolean deleteTable(String pkColumn, long pkData)
return mDb.delete(TABLE_NAME, pkColumn + "=" + pkData, null) > 0;
/*db.delete("memos", "_id=" + memo.getId(), null);
db.delete(String table, String whereClause, String[] whereArgs);*/
public Cursor selectTable(String[] columns, String selection,
String[] selectionArgs, String groupBy,
String having, String orderBy)
return mDb.query(TABLE_NAME, columns, selection, selectionArgs, groupBy, having, orderBy);
public boolean updateTable(ContentValues values, String pkColumn, long pkData)
return mDb.update(TABLE_NAME, values, pkColumn + "=" + pkData, null) > 0;
Project.java
public class Project
private long id;
private String eng;
private String kor;
public Project(long id, String eng)
this.id = id;
this.eng = eng;
public Project(long id, String eng, String kor)
this.id = id;
this.eng = eng;
this.kor = kor;
public long getId()
return id;
public String getEng()
return eng;
public String getKor()
return kor;
MainActivity.java
public class MainActivity extends AppCompatActivity
private Button bt;
private EditText et1;
private EditText et2;
private ListView lv;
DBAdapter db;
ArrayList<HashMap<String,String>> list;
SimpleAdapter sap;
Project project;
private static final String TAG = "LogTest";
@Override
public void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
bt = (Button)findViewById(R.id.ins);
et1 = (EditText)findViewById(R.id.eng);
et2 = (EditText)findViewById(R.id.kor);
//
list = new ArrayList<HashMap<String,String>>();
makeDS();
sap = new SimpleAdapter(this, list, R.layout.memberlist, new String[] "eng", "kor", new int[] R.id.text1, R.id.text2);
lv.setAdapter(sap);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener()
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id)
/*sap.getItem(position);
et1.setText(project.getEng());
et2.setText(project.getKor());*/
Log.v(TAG, "list click");
);
db.close();
public void makeDS()
lv = (ListView)findViewById(R.id.list);
list.clear();
db = new DBAdapter(this, DBAdapter.SQL_CREATE_PROJECT, "project");
db.open();
String columns[] = "eng", "kor";
Cursor cursor = db.selectTable(columns, null, null, null, null, null);
if(cursor.moveToFirst())
do
HashMap<String,String> map = new HashMap<String,String>();
map.put("eng", cursor.getString(0));
map.put("kor", cursor.getString(1));
list.add(map);
while(cursor.moveToNext());
public void onClick(View v)
// TODO Auto-generated method stub
// DBAdapter db;
switch (v.getId())
case R.id.ins:
String streng = et1.getText().toString();
String strkor = et2.getText().toString();
db = new DBAdapter(this, DBAdapter.SQL_CREATE_PROJECT, "project");
db.open();
ContentValues value = new ContentValues();
value.put("eng", streng);
value.put("kor", strkor);
db.insertTable(value);
break;
case R.id.del:
db = new DBAdapter(this, DBAdapter.SQL_CREATE_PROJECT, "project");
db.open();
db.deleteTable("_id", project.getId());
Log.v(TAG, "del button click");
break;
makeDS();
sap.notifyDataSetChanged();
db.close();
【问题讨论】：
【参考方案1】：请更换
new String[] "eng", "kor" to String[] tmpdata= "eng", "kor";
sap = new SimpleAdapter(this, list, R.layout.memberlist, tmpdata, new int[] R.id.text1, R.id.text2);
现在是 listview.onItemClickListener
et1.setText(tmpData[0]);
et2.setTexttmpdata[1] );
【讨论】：
【参考方案2】：首先在listView中声明你的按钮，这样当你点击delete时，app会删除你要删除的对象，否则它不知道你要删除listView的哪个对象 其次，您应该在 SimpleAdapter 构造函数中的 MainActivity.class 中实现 OnClickListener，如下所示：
sap = new SimpleAdapter(this, list, R.layout.memberlist, new String[] "eng", "kor", new int[] R.id.text1, R.id.text2)
@Override
public View getView(final int position, View convertView,
ViewGroup parent)
ViewGroup layout = (ViewGroup) super.getView(position,
convertView, parent);
delete = (Button) layout.findViewById(R.id.delete_button);
edit = (Button) layout.findViewById(R.id.edit_button);
delete.setTag(position);
edit.setTag(position);
delete.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
list.remove(position);
notifyDataSetChanged();
);
edit.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View view)
//do smth
);
return layout;
;
然后设置你的适配器
【讨论】：
data.remove(位置);请问那里的“数据”是什么意思？ 你应该使用列表而不是数据 我更新了我的答案，我猜你有点困惑以上是关于如何在 simpleadapter 中实现 OnItemClickListener？代码删除、更新等，的主要内容，如果未能解决你的问题，请参考以下文章
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