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我有一个自定义 ListView，其中有一个 textview 和一个图像。我在我的 customlistadapter 类中为 imageview 设置了 onclicklistener，所以我需要在单击图像时对主布局进行一些更改。请参阅以下代码以供参考...

MainActivity.java

hmDataList.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> parent, View view,
                int position, long arg1) {

            DataFields dataField = (DataFields) hmDataList
                    .getItemAtPosition(position);
            ImageView v = (ImageView) view.findViewById(R.id.hmFieldDeleteImage);
            RelativeLayout mainRL = (RelativeLayout)view.findViewById(R.id.hmFieldMainRL);
            }

}

CustomListAdapter.java

    public View getView(int position, View convertView, ViewGroup parent) {
        holder = null;
        DataFields rowItems = (DataFields) getItem(position);
        LayoutInflater inflater = (LayoutInflater) context
                .getSystemService(Activity.LAYOUT_INFLATER_SERVICE);

        if (convertView == null) {
            convertView = inflater.inflate(R.layout.home_field_row, null);
            holder = new ViewHolder();
            holder.mName = (TextView) convertView.findViewById(R.id.hmFieldName);
            holder.mDeleteImage = (ImageView)convertView.findViewById(R.id.hmFieldDeleteImage);

            convertView.setTag(holder);

            holder.mDeleteImage.setTag(position);
            final View clickView = convertView;
            holder.mDeleteImage.setOnClickListener(new ImageView.OnClickListener() {

                @Override
                public void onClick(final View view) {
                    count++;
                    clickView.setBackgroundColor(color.list_row_bg);
                    //
                    //Some changes has to be made for the main activity's layout
                    //
                }
            });
        }

        else {
            holder = (ViewHolder) convertView.getTag();
        }

        holder.mName.setText(rowItems.getName());

        return convertView;
    }

list_row.xml

<TextView
    android:id="@+id/hmFieldName"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_centerVertical="true"
    android:layout_marginBottom="10dp"
    android:layout_marginLeft="10dp"
    android:layout_marginTop="10dp"
    android:gravity="left"
    android:shadowColor="#000000"
    android:shadowDx="0"
    android:shadowDy="0"
    android:shadowRadius="2"
    android:text="@string/no_data"
    android:textAppearance="?android:attr/textAppearanceMedium"
    android:textColor="#F2F2F2" />

<ImageView
    android:id="@+id/hmFieldDeleteImage"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentRight="true"
    android:layout_centerVertical="true"
    android:layout_marginBottom="10dp"
    android:layout_marginRight="10dp"
    android:layout_marginTop="10dp"
    android:contentDescription="@string/right_arrow"
    android:src="@drawable/delete" />

activity_main.xml有一些隐藏的小部件，所以我需要在单击自定义 ListView 中的图像时取消隐藏它们。

简单来说，有没有办法从其他类更新主要活动的 gui？非常感谢任何类型的帮助或示例或参考。谢谢 ！

4

2 回答 2

4

这是一个很好的方法：

在您的MainActivity.java添加：

public onClickListener mListener = new OnClickListener(){
        @Override
            public void onClick(final View view) {
                count++;
                view.setBackgroundColor(color.list_row_bg);
                //
                //Some changes has to be made for the main activity's layout
                //

               // Here you can delete add or do anything to your views
            }

  };

当您创建一个新的 CustomListAdapter 对象时：

CustomListAdapter adapter = new .....;
adapter.setActivity(this);

并在您的CustomListAdapter.java添加：

 private MainActivity mActivity;


 public void setActivity(MainActivity activity){
          mActivity = activity;
 }

并在您的 getView 方法中：

public View getView(int position, View convertView, ViewGroup parent) { holder = null; DataFields rowItems = (DataFields) getItem(position); LayoutInflater inflater = (LayoutInflater) 上下文 .getSystemService(Activity.LAYOUT_INFLATER_SERVICE);

    if (convertView == null) {
        convertView = inflater.inflate(R.layout.home_field_row, null);

             ....  Same Code

        holder.mDeleteImage.setTag(position);
        final View clickView = convertView;
// use this code
        holder.mDeleteImage.setOnClickListener(mActivity.mListener);
    }

    else {
        holder = (ViewHolder) convertView.getTag();
    }

}
于 2013-02-08T19:54:47.100 回答
0

在您定义图像/按钮是否首先隐藏之前的其他活动。

在你 OnClick 放上setContentView(yourmainActivity)然后定义你的ImageView哪个是不可见的。然后用你的方法使背部可见。PS把代码放在startActivity之后。希望对你有帮助。

于 2013-02-08T19:46:06.590 回答