如何获取ImageView超出Onitemclicklistener范围
如何获取ImageView超出OnItemClickListener范围?如何获取ImageView超出Onitemclicklistener范围
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;
}
}
});
尝试在`的onCreate ...使用inflater
你必须使用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);
把
ImageView imageView2 = (ImageView) view.findViewById(R.id.applist_item_image);
外前onItemClickListener的范围。
换句话说,把它放在孔类活动的范围
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
}
创建完成后,发生java null异常 –
可否请您复制您的所有类? – PereCullera
setContentView(R.layout.activity_main); \t \t \t \t字符串[] ITEMNAME = { “无线网络”, “蓝牙”, “移动数据”, \t \t}; 整数[] imgid = {R.drawable.ic_launcher,R.drawable.ic_launcher, \t \t \t \t R.drawable.ic_launcher, }; mListView2 =(ListView中)findViewById(R.id.lvAppList1); \t \t preferences = PreferenceManager.getDefaultSharedPreferences(this); \t finalRowActivityadapter = newRowActivity(this,itemname,imgid); \t \t mListView2.setAdapter(adapter); \t \t mListView2.setOnItemClickListener(新AdapterView.OnItemClickListener(){ \t \t \t ImageView的imageView2 =(ImageView的)findViewById(R.id.applist_item_image); –
你可以声明imageview的全球性,如: - ImageView的ImageView的
我做到了,但Java空异常导致通过id查找是在onitemclicklistener我想使用imageview以外的onitemclicklistener作用域.. ?? 怎么样? –
如果你这样做,你可以很容易地在imageview外使用 –
我通过声明全局但是发生null异常来做到这一点。我现在应该做什么? –
编写代码'imageView2 =(ImageView的)view.findViewById(R.id.applist_item_image);'上面的这个'OnItemClickListener()'或'中的OnCreate()' –
其不工作,因为ImageView的是不从R.layout.activity_main 它从另一个xml文件这是R.layout.activity_row 所以我如何得到图像视图来解决我的问题? –