Question

如何在OnItemClickListener范围之外获取ImageView？

mListView2.setOnItemClickListener(new AdapterView.OnItemClickListener() {
  @Override
  public void onItemClick(AdapterView<?> parent, View view,int position, long id) {
            imageView2 = (ImageView) view.findViewById(R.id.applist_item_image);
            if (switches==true) {
                imageView2.setImageResource(R.drawable.on);
                preferences.edit().putBoolean("tgpref", true).commit();
                switches = false;
            } else {
                imageView2.setImageResource(R.drawable.off);
                preferences.edit().putBoolean("tgpref", false).commit();
                switches = true;
            }
         }
    });

Answer 1

点击

ImageView imageView2 = (ImageView) view.findViewById(R.id.applist_item_image);

在onItemClickListener范围之前的外部。

换句话说，把它放在洞类活动

的范围内

setContentView(R.layout.activity_main);

ImageView imageView2 = (ImageView) findViewById(R.id.applist_item_image);

String[] itemname = { "Wi-Fi", "Bluetooth", "Mobile Data", };
Integer[] imgid = { R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher, };
ImageView mListView2 = (ListView) findViewById(R.id.lvAppList1);
preferences=PreferenceManager.getDefaultSharedPreferences(this); 
finalRowActivityadapter=newRowActivity(this,itemname,imgid); 
mListView2.setAdapter(adapter); 
mListView2.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
    //here you can now access imageView2
}

Answer 2

尝试在onCreate中使用inflater ...您必须使用addView（）将ImageView添加到当前布局。

LayoutInflater inflater = (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

View vi = inflater.inflate(R.layout.activity_row, null); //activity_row.xml is your file.
imageView2 = (ImageView) view.findViewById(R.id.applist_item_image);

Answer 3

您可以将imageview全局声明为： - ImageView imageview

如何在onitemclicklistener范围之外获取imageview

3 个答案: