單擊列表視圖中的項目時不會進行下一個活動。

Question

我是android新手，使用sqlite在數據庫中插入數據，並在自定義列表視圖中使用這些數據。

我想：當我編輯與編輯按鈕，在接下來的活動表明該行字符串的數據，但是，在每一行的編輯，但顯示第一行字符串通過圖像數據.. u能esily瞭解發生的問題在新的活動頁面的行名，而我點擊編輯.. 刪除排當我按下刪除..幫助我..

的Java編輯清單文件

public class EditLIST extends Activity { 


    private AndroidSQLite mySQLiteAdapter ; 
final static String EXTRA_MESSAGE = "edit.list.message"; 
public void onClick (View view) { 


    Intent intent = new Intent (this,display.class); 
    TextView textView=(TextView) findViewById(R.id.textView1); 
    String message=textView.getText().toString(); 


    //data.putString("thetext",text); 
    intent.putExtra(EXTRA_MESSAGE,message); 
    startActivity(intent); 
} 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_edit_list); 
     ListView listContent = (ListView)findViewById(R.id.listView1); 



     mySQLiteAdapter = new AndroidSQLite(this); 
     mySQLiteAdapter.openToWrite(); 
     mySQLiteAdapter.deleteAll(); 

     mySQLiteAdapter.insert("umesh"); 
     mySQLiteAdapter.insert("kalpesh"); 
     mySQLiteAdapter.insert("manish"); 


     mySQLiteAdapter.close(); 

     mySQLiteAdapter = new AndroidSQLite(this); 
     mySQLiteAdapter.openToRead(); 

     Cursor cursor = mySQLiteAdapter.queueAll(); 
     startManagingCursor(cursor); 

     String[] from = new String[]{AndroidSQLite.KEY_FNAME}; 
     int[] to = new int[]{R.id.textView1}; 




     SimpleCursorAdapter cursorAdapter = 
     new SimpleCursorAdapter(this, R.layout.button, cursor, from, to); 


        listContent.setAdapter(cursorAdapter); 



    } 


    } 

AndroidSQLite.java文件

package edit.list;

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

public class AndroidSQLite { 

public static final String MYDATABASE_NAME = "abncd"; 
public static final String MYDATABASE_TABLE = "zxc"; 
public static final int MYDATABASE_VERSION = 1; 
public static final String KEY_ID = "_id"; 
public static final String KEY_FNAME = "FNAME"; 



//create table MY_DATABASE (ID integer primary key, Content text not null); 
private static final String SCRIPT_CREATE_DATABASE = 
"create table " + MYDATABASE_TABLE + " (" 
+ KEY_ID + " integer primary key autoincrement, " 
+ KEY_FNAME + " text not null);"; 

private SQLiteHelper sqLiteHelper; 
private SQLiteDatabase sqLiteDatabase; 

private Context context; 

public AndroidSQLite(Context c){ 
context = c; 
} 

public AndroidSQLite openToRead() throws android.database.SQLException { 
sqLiteHelper = new SQLiteHelper(context, MYDATABASE_NAME, null, MYDATABASE_VERSION); 
sqLiteDatabase = sqLiteHelper.getReadableDatabase(); 
return this; 
} 

public AndroidSQLite openToWrite() throws android.database.SQLException { 
sqLiteHelper = new SQLiteHelper(context, MYDATABASE_NAME, null, MYDATABASE_VERSION); 
sqLiteDatabase = sqLiteHelper.getWritableDatabase(); 
return this; 
} 

public void close(){ 
sqLiteHelper.close(); 
} 

public long insert(String fname){ 

ContentValues contentValues = new ContentValues(); 

contentValues.put(KEY_FNAME, fname); 

return sqLiteDatabase.insert(MYDATABASE_TABLE, null, contentValues); 
} 

public int deleteAll(){ 
return sqLiteDatabase.delete(MYDATABASE_TABLE, null, null); 
} 

public Cursor queueAll(){ 
String[] columns = new String[]{KEY_ID, KEY_FNAME}; 
Cursor cursor = sqLiteDatabase.query(MYDATABASE_TABLE, columns, 
    null, null, null, null, null); 

return cursor; 
} 

public class SQLiteHelper extends SQLiteOpenHelper { 

public SQLiteHelper(Context context, String name, 
    CursorFactory factory, int version) { 
super(context, name, factory, version); 
} 

@Override 
public void onCreate(SQLiteDatabase db) { 
// TODO Auto-generated method stub 
db.execSQL(SCRIPT_CREATE_DATABASE); 
} 

@Override 
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 
// TODO Auto-generated method stub 

} 

} 

} 

display.java

public class display extends Activity { 
    public void onCreate(Bundle savedInstanceState) { 
      super.onCreate(savedInstanceState); 
      setContentView(R.layout.display); 


       // Get the message from the intent 
       Intent intent = getIntent(); 
       String message = intent.getStringExtra(EditLIST.EXTRA_MESSAGE); 

       // Create the text view 
       EditText editText = new EditText(this); 
       editText.setTextSize(40); 
       editText.setText(message); 

       // Set the text view as the activity layout 
       setContentView(editText); 
       } 
    public boolean onCreateOptionsMenu (Menu menu) 
     { 
      MenuInflater inflater = getMenuInflater(); 
      inflater.inflate(R.menu.activity_edit_list,menu); 
      return true; 
     } 

} 

Answer 1

我不知道如果我理解正確。據我瞭解，當你點擊編輯時，你總是從第一個項目獲取數據，而不管你實際點擊了哪個項目？在這種情況下，我認爲這個問題是在這裏：

TextView textView=(TextView) findViewById(R.id.textView1); 

你在整個列表搜索R.id.textView1，只被返回的第一個項目。您只需在所點擊的項目內搜索：

TextView textView=(TextView) view.findViewById(R.id.textView1); 

其中view是onClick函數的參數。

正如我所說我不確定這是否是問題，但它看起來像一個問題。

Answer 2

我認爲你必須與你的刪除代碼 問題就會像..

公衆詮釋delete_byID（INT ID）{
sqLiteDatabase.delete（MYDATABASE_TABLE，KEY_ROWID + 「=」 + 1，空值） ; return -1; }

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