Question

LinearLayout linContact = (LinearLayout) mView.findViewById(R.id.linContacts);

LinearLayout.LayoutParams leftGravityparas = new LinearLayout.LayoutParams(0,LayoutParams.WRAP_CONTENT);
LinearLayout.LayoutParams rightGravityParams = new LinearLayout.LayoutParams(30, 30);

for (int i = 0; i < contactList.size(); i++) {
    final ClsAdviserData contact = .contactList.get(i);

    if (contact.isSelected()) {

        linearLayout = new LinearLayout(getActivity());
        LinearLayout.LayoutParams linMainparam = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
        linearLayout.setBackgroundColor(getActivity().getResources().getColor(R.color.light_grey_backgeound));
        linearLayout.setOrientation(LinearLayout.HORIZONTAL);
        linearLayout.setLayoutParams(linMainparam);
        linMainparam.setMargins(0, 10, 0, 0);

        leftGravityparas.gravity = Gravity.LEFT;
        leftGravityparas.weight = 0.9f;
        TextView txtContact = new TextView(getActivity());
        txtContact.setTextSize(16);
        // txtContact.setBackgroundColor(getActivity().getResources().getColor(R.color.light_grey_backgeound));
        txtContact.setLayoutParams(leftGravityparas);
        txtContact.setId(i);

        leftGravityparas.setMargins(0, 10, 0, 0);

        txtContact.setPadding(20, 10, 10, 10);
        txtContact.setText(contact.getName());

        linearLayout.addView(txtContact, leftGravityparas);

        rightGravityParams.gravity = Gravity.RIGHT | Gravity.CENTER_VERTICAL;
        rightGravityParams.weight = 0.1f;

        final ImageView imgDelContact = new ImageView(getActivity());

        imgDelContact.setLayoutParams(rightGravityParams);
        imgDelContact.setTag(i);
        imgDelContact.setClickable(true);
        imgDelContact.setOnClickListener(this);
        imgDelContact.setImageResource(R.drawable.ic_close_grey);

        linearLayout.addView(imgDelContact, rightGravityParams);
        // linContact.setTag(i);
        linContact.addView(linearLayout);

        imgDelContact.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                Toast.makeText(v.getContext(), "Toast ==>" + contact.getName() + v.getTag(), Toast.LENGTH_SHORT).show();

                // linContact.removeViewAt((Integer) v.getTag());
                linearLayout.setVisibility(View.GONE);

                // lin.removeViewAt((Integer)v.getTag());
            }
        });
    }
}

我编写了上面的代码来动态创建文本域和按钮;但是现在我需要在单击按钮时删除2个文本字段和一个按钮。我该怎么做？

Answer 1

添加 -
在使用LinearLayout

中声明的addView（）方法初始化add subview之后

linearLayout.addView(txtContact);
linearLayout.addView(imgDelContact);

隐藏 -
隐藏视图，以便您可以在需要时再次获取

imgDelContact.setVisibility(View.GONE);
txtContact.setVisibility(View.GONE);

删除 -
或者，如果您不想再次使用它，也可以删除。

linearLayout.removeView(txtContact);
linearLayout.removeView(imgDelContact);

Answer 2

删除任何可以使用的视图

aLinearLayout.removeView(view)// to remove particular view
aLinearLayout.removeViewAt(position);// to remove view from particular position

Answer 3

如果您正在动态创建视图，而只需要删除所有视图，则只需使用

aLinearLayout.removeAllViews();

这将清除布局。

如何从线性布局动态添加和删除元素？

3 个答案: