Question

我正在尝试让我的一个功能在我的所有绑定活动中都很常见。我想听听你的一些建议。

目前我的代码如下： -

public static void stateDialog(Context context, String[] stateList, final FragmentSendAlertBinding binding) {
    mStateDialog = new Dialog(context);
    mStateDialog.getWindow().setBackgroundDrawable(new ColorDrawable(android.graphics.Color.TRANSPARENT));
    mStateDialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
    mStateDialog.show();
    mStateDialog.setCancelable(false);
    mStateDialog.setContentView(R.layout.dialog_select_state);
    CardView cvState = (CardView) mStateDialog.findViewById(R.id.cv_state);
    final ListView states = (ListView) mStateDialog.findViewById(R.id.countryList);
    final TextView tvCancel = (TextView) mStateDialog.findViewById(R.id.tv_cancel);
    final Animation myAnim = AnimationUtils.loadAnimation(context, R.anim.bounce);
    MyBounceInterpolator interpolator = new MyBounceInterpolator(0.2, 20);
    myAnim.setInterpolator(interpolator);
    cvState.startAnimation(myAnim);
    ArrayAdapter<String> itemList = new ArrayAdapter<String>(context, android.R.layout.simple_list_item_1, stateList);
    states.setAdapter(itemList);
    states.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) {
            binding.tvState.setText((String) arg0.getItemAtPosition(position));
            mStateDialog.dismiss();
        }
    });
    tvCancel.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            mStateDialog.dismiss();
        }
    });

}

我可以使用类似的东西：

public static void stateDialog(Context context, String[] stateList, final  ViewDataBinding<T> binding) {
       }

stateDialog是在我的Alert类中创建的一个函数，我只希望这个函数对我的所有Binding活动都是通用的。我不想为我的每个绑定活动创建单独的函数。

这样我的这个功能就可以用于我的所有绑定活动，而不仅仅是 FragmentSendAlertBinding

这对你来说似乎很愚蠢，但我只是想知道有没有办法实现这一点。

感谢和安培;问候我之前从未创建过泛型类，我只是尝试

任何帮助都会得到极大的赞赏!!!。

Answer 1

我建议您为其创建界面

，而不是将其设为通用

interface StateDialogListener{
    public void onValueSelect(String value);
}

您的方法看起来

public static void stateDialog(Context context, String[] stateList, final StateDialogListener listener) {
    mStateDialog = new Dialog(context);
    mStateDialog.getWindow().setBackgroundDrawable(new ColorDrawable(android.graphics.Color.TRANSPARENT));
    mStateDialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
    mStateDialog.show();
    mStateDialog.setCancelable(false);
    mStateDialog.setContentView(R.layout.dialog_select_state);
    CardView cvState = (CardView) mStateDialog.findViewById(R.id.cv_state);
    final ListView states = (ListView) mStateDialog.findViewById(R.id.countryList);
    final TextView tvCancel = (TextView) mStateDialog.findViewById(R.id.tv_cancel);
    final Animation myAnim = AnimationUtils.loadAnimation(context, R.anim.bounce);
    MyBounceInterpolator interpolator = new MyBounceInterpolator(0.2, 20);
    myAnim.setInterpolator(interpolator);
    cvState.startAnimation(myAnim);
    ArrayAdapter<String> itemList = new ArrayAdapter<String>(context, android.R.layout.simple_list_item_1, stateList);
    states.setAdapter(itemList);
    states.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) {
            listener.onValueSelect((String) arg0.getItemAtPosition(position));
            //binding.tvState.setText((String) arg0.getItemAtPosition(position));
            mStateDialog.dismiss();
        }
    });
    tvCancel.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            mStateDialog.dismiss();
        }
    });

}

最后来自你所谓的任何地方

stateDialog(this,<your stateList>, new StateDialogListener(){
     @Override
     public void onValueSelect(String value){
         binding.tvState.setText(value);
     }
});

Answer 2

为绑定活动创建父类。请注意，该类应具有您将从其子类的对象中使用的所有方法。然后创建扩展父绑定类的其他子类。

class ParentBinding{

    public void method1();

    public void method2();

    public void method3();

}

Cusom Binding class

class BindingClass1 extends ParentBinding{

@override
public void method1(){
  super();
}

@override
public void method1(){
  super();
}

@override
public void method1(){
  super();
}

}

然后您的方法可以写成

public static void stateDialog(Context context, String[] stateList, final ParentBinding binding) {

在方法中形成通用对象

2 个答案: