將一個整數從一個customcursoradapter傳遞給一個活動

Question

我可以使用您用於在不同活動之間傳遞數據的相同過程嗎？這可以用於在活動和cursoradapter之間傳遞數據。 產生不運行時的錯誤是編譯

The constructor Intent(MyAdapterQuestion, Class<Basic_database_questionsActivity>) is undefined 

Intent i = new Intent(MyAdapterQuestion.this, Basic_database_questionsActivity.class); 
      Bundle b = new Bundle(); 
      // get the current value of timerStart variable and store it in timerlogic 
      //Log.e(LOGS, "Whatis the value of timerstart inside the intentcalls method" + aInt); 

      b.putInt("timerlogic", aInt); 

我有一個適配器名爲MyAdapterQuestion並呼籲Basic_database_questionsActivity活動。

我有一個計數器，它的方法bindView方法

public void bindView(View v, Context context, Cursor c) { 

    if(radiopos1.isChecked()) 
     { 

      // i want to update my main activity 
    // this method increment the correct answer by one I want to get that value and //pass it back to the activity  
    correctAnswer(); 

     } 

    } 

Answer 1

號內不能發送意向的適配器。活動創建了適配器，以便它能夠與它進行通信。通過調用的方法，傳遞參數的構造函數等

編輯：添加代碼示例

如果適配器需要調用該活動的方法，你可以做這樣的事情：

在MyAdapterQuestion：

// Stores a reference to the owning activity 
private Basic_database_questionsActivity activity; 

// Sets the owning activity (caller should call this immediately after constructing 
// the adapter) 
public void setActivity(Basic_database_questionsActivity activity) { 
    this.activity = activity; 
} 

// When you want to call a method in your activity (to get or set data), you do 
// something like this: 
activity.setCorrectAnswer(answer); 

在Basic_database_questionsActivity：

// In the place where you create the adapter, do this: 
MyAdapterQuestion adapter = new MyAdapterQuestion(parameters...); 
adapter.setActivity(this); // Passes a reference of the Activity to the Adapter 

public void setCorrectAnswer(int answer) { 
    // Here is where the adapter calls the activity back 
    ... 
} 

我希望你明白。您只需要一種方法讓適配器獲得對該活動的引用，以便它可以根據需要調用它的方法。

注：更好的編程風格將包括活動在適配器構造函數的參數，但因爲你沒有爲你的適配器構造張貼代碼我不想混淆你太多。