Question

对不起，这是我的第一个问题... 我有一个 ArrayAdapter 类，我想从内部匿名类中调用 startActivity ，但是我遇到了“无法解析方法startActivity”的错误

public View getView(final int position, @Nullable final View convertView, @NonNull ViewGroup parent) {

    //inflating the layout
    LayoutInflater inflater = (LayoutInflater)getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View row = inflater.inflate(R.layout.itemview_antliostasia, parent, false);

    //get the reference to the view objects
    final TextView myName = (TextView)row.findViewById(R.id.itemViewAntliostasiaName);
    final TextView myID = (TextView)row.findViewById(R.id.itemViewAntliostasiaID);
    final TextView myAntlies = (TextView)row.findViewById(R.id.itemViewAntliostasiaAntlies);
    ImageView myEdit = (ImageView) row.findViewById(R.id.imageAntliostasiaEdit);
    ImageView myDelete = (ImageView)row.findViewById(R.id.imageAntliostasiaDelete);

    //providing the element of an ArrayList by specifying its position
    myName.setText(dataList.get(position).getName());
    myID.setText(dataList.get(position).getId());
    myAntlies.setText(dataList.get(position).getAntlies());
    myEdit.setImageResource(R.drawable.imgedit);
    myDelete.setImageResource(R.drawable.imgdelete);

    myEdit.setOnClickListener(new View.OnClickListener() {
        @Override
        public  void onClick(View v) {
            Intent intent = new Intent(getContext(), EditAntliostasioActivity.class);
            String[] editValues = new String[2];
            editValues[0] = myName.getText().toString();
            editValues[1] = myAntlies.getText().toString();
            intent.putExtra("edit values", editValues);
            startActivity(intent);

        }
    });

我认为getContext（）出了点问题...请帮助我

Answer 1

尝试一下

Intent intent = new Intent(view.getContext(), EditAntliostasioActivity.class);

发生此错误的原因是因为getContext()返回了活动的上下文，而不是匿名类。因此，您必须使用view.getContext()。

Answer 2

startActivity()是Context的一种方法，因此您需要在Context对象上调用它：

getContext().startActivity(intent);

请注意，如果Context不是Activity，则还需要在FLAG_ACTIVITY_NEW_TASK上设置Intent。但是startActivity()在Activity中被覆盖为不需要它，并且您在此处具有活动上下文。

Answer 3

创建Context的实例变量。

Class Vehicle
{
Context mContext;

初始化上下文...

public Vehicle(Context mContext)
{
this.mContext = mContext;
}

每当您调用startActivity时，就这样做。.

mContext.startActivity(intent);

如何从ArrayAdapter类的内部匿名类中调用startActivity？

3 个答案: