Question

编辑4：这将是我最新的代码，我会在此处删除并更新。

movementSetsRepsFrag.java：https://codeshare.io/GZm47

setSchemes.java：https://codeshare.io/kMdj5

ControllerData.java: https://codeshare.io/nAiSh

编辑3：

在setSchemes.java中，我删除了这段代码：

    // Here I'm trying to assign a name to the Child Fragment Manager
    FragmentTransaction fragmentTransaction = getChildFragmentManager().beginTransaction();

    // And here I'm trying to use that to call my getSpinner method
    // But "getSpinnerValue()" is red in the IDE and won't compile
    String parentSpinnerValue = fragmentTransaction.getSpinnerValue();

我现在正尝试在另一个论坛上建议的东西，一个有人向我展示的回调技术（作为getParentFragment的一种方式）：

在setSchemes.java中

    // above onCreateView
    public interface setSchemesCallback{
        String getSpinnerValue();
    }

    private setSchemesCallback callback;

    // in onCreateView
    callback = (setSchemesCallback) getParentFragment();

    // in onPause
    String parentSpinnerValue = callback.getSpinnerValue();

编辑2：

以下是我用来收集和整理数据的对象ControllerData.java

public class ControllerData {

    public String exSpinnerValue1;

    // DECLARE ARRAYS

    String[] exArray1 = new String[15];
    String[] exArray2 = new String[15];   

    private static ControllerData controller;

    public static ControllerData getInstance(){
       if (controller == null){
           controller = new ControllerData();
       }

       return controller;
    }

    // PARENT SPINNER SETTERS
    public void setExSpinnerValue1(String text){
       if(exArray1[0] == null){
           exArray1[0] = text;
       }else if(exArray2[0] == null){
           exArray2[0] = text;
       }
    }

    int a1 = 1;
    int b1 = 1;

    // CHILD STRING VALUE SETTERS
    public void setEditTextValue1(String setSchemeValue, String parentSpinnerValue){

        if(exArray1[0].equals(parentSpinnerValue)){
            if(exArray1[a1] == null){
                exArray1[a1] = setSchemeValue;
                a1++;
            }
        }
        if(exArray2[0].equals(parentSpinnerValue)){
            if(exArray2[b1] == null){
                exArray2[b1] = setSchemeValue;
                b1++;
            }
        }
    }
}

编辑：好的，现在我正在尝试在setSchemes（嵌套的frag）中使用getChildFragmentManager，因为如果父级是活动的子级，我似乎可以调用getParentFragment。这就是我现在所拥有的，我很确定我的语法都搞砸了：

setSchemes.java

@Override
public void onPause(){
    super.onPause();

    // Here I'm trying to assign a name to the Child Fragment Manager
    FragmentTransaction fragmentTransaction = getChildFragmentManager().beginTransaction();

    // And here I'm trying to use that to call my getSpinner method
    // But "getSpinnerValue()" is red in the IDE and won't compile
    String parentSpinnerValue = fragmentTransaction.getSpinnerValue();


    EditText setsEditText = (EditText) getView().findViewById(R.id.sets);
    EditText repsEditText = (EditText) getView().findViewById(R.id.reps);
    EditText weightEditText = (EditText) getView().findViewById(R.id.weight);


    String value = setsEditText.getText().toString() + " x " + repsEditText.getText().toString() + " @ " +
            weightEditText.getText().toString();


    ControllerData.getInstance().setEditTextValue1(value, parentSpinnerValue);

}

所以，我“在”嵌套片段中。此嵌套片段是在从父片段单击按钮时创建的。根据用户单击按钮的次数，可以创建许多实例。父母本身也是动态添加的。它们之间的差异是选择的微调值。然后，我将这些嵌套片段的值传递给对象。我需要嵌套的片段“知道”它们“属于”哪个父片段，我试图这样做的方法是调用父节点的微调器值，然后用嵌套片段自己的值传递该值。这样我就可以通过编程方式确定将嵌套值传递给哪个数组。

这是父片段，movingSetsReps.java

// Here in onPause I send my spinner value to my ControllerData.
// I send the spinner value to an array at index [0]
// This is so that later I can compare the value in array[0]
//with the value passed with the nested fragment 
@Override
public void onPause() {
    super.onPause();

    Spinner exerciseSpinner = (Spinner) getView().findViewById(R.id.movementName);
    String spinnerText = exerciseSpinner.getSelectedItem().toString();

    ControllerData.getInstance().setExSpinnerValue1(spinnerText);

}


// Here is where I set up the method that should be called by the nested fragment
public String getSpinnerValue(){
    Spinner exerciseSpinner = (Spinner) getView().findViewById(R.id.movementName);
    String spinnerText = exerciseSpinner.getSelectedItem().toString();

    return spinnerText;
}

现在对于嵌套片段，setSchemes.java

@Override
public void onPause(){
    super.onPause();

    // I thought this would work but it's not. This should call
    // the method in whatever is the parent fragment
    String parentSpinnerValue = ((movementSetsRepsFrag) getParentFragment()).getSpinnerValue();


    // Everything below here pertains to the sending of a string to ControllerData's arrays. 
    EditText setsEditText = (EditText) getView().findViewById(R.id.sets);
    EditText repsEditText = (EditText) getView().findViewById(R.id.reps);
    EditText weightEditText = (EditText) getView().findViewById(R.id.weight);

    String value = setsEditText.getText().toString() + " x " + repsEditText.getText().toString() + " @ " +
            weightEditText.getText().toString();

    ControllerData.getInstance().setEditTextValue1(value, parentSpinnerValue);

}

现在在我的results.java中我有一些日志方法告诉我我的数组最终包含什么。我每次都得到null。

Log.d("array1", ControllerData.getInstance().exArray1[0] + " " + ControllerData.getInstance().exArray1[1]);
Log.d("array2", ControllerData.getInstance().exArray2[0] + " " + ControllerData.getInstance().exArray2[1]);

我的输出看起来像：“array1 null null”而不是，例如“bench press 2x15 @ 135 3x10 @ 115”

尝试使用getParentFragment从父片段获取值，返回null

0 个答案: