java - 在动态创建的元素上添加 onClick 监听器不起作用

Question

我正在运行时创建动态 textview。添加 onClick() 监听器。它仅适用于运行时创建的最后一个 textview，而不适用于创建的每个 textview。这是我的代码:-

@Override
public void onComplete(@NonNull Task<Object> task) {
    if (task.isComplete()) {
        ArrayList<Document> tagLocat = (ArrayList<Document>) task.getResult();
        tv=new TextView[tagLocat.size()];

            for (i = 0; i < tagLocat.size(); i++) {
            Document doc = tagLocat.get(i);
            TextView tv1 = new TextView(MainActivity.this);
            Log.i("Document", "" + doc);
             notification = doc.getString("notification");
            Log.i("Double", "" + notification);
            LinearLayout.LayoutParams lparams = new LinearLayout.LayoutParams(
                    LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);

            lparams.setMargins(10,10,10,10);
            tv1.setLayoutParams(lparams);
            tv1.setTag(i);
            tv1.setId(i);
            tv1.setTextSize(30);
            tv1.setPadding(50, 0 ,0,0);

            tv1.setText(notification);
            tv[i] = tv1;
            linearLayout.addView(tv[i]);

           tv[i].setBackgroundColor(Color.GRAY);

            tv[i].setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    tv[i].setBackgroundColor(Color.LTGRAY);
                }
            });
        }
    } else {
        Log.i("Exception",task.getException().toString());
    }
}

Answer 1

你必须在设置onclicklistener后将你的textview添加到数组中

喜欢

                    tv1.setLayoutParams(lparams);
                    tv1.setTag(i);
                    tv1.setId(i);
                    tv1.setTextSize(30);
                    tv1.setPadding(50, 0 ,0,0);

                    tv1.setText(notification);                    

                   tv1.setBackgroundColor(Color.GRAY);

                    tv1.setOnClickListener(new View.OnClickListener() {
                        @Override
                        public void onClick(View v) {
                            v.setBackgroundColor(Color.LTGRAY);
                        }
                    });

                    tv[i] = tv1;
                    linearLayout.addView(tv[i]);