我正在尝试编写一个应用，其中用户点击列表视图中的项目。然后会出现一个弹出窗口，其中包含有关用户点击的项目的一些信息。弹出窗口显示没有问题，但代码不会更改TextViews或Buttons的内容。任何反馈将不胜感激。
以下是listview和弹出窗口的代码：
public class MyRoutes extends LinearLayout {
private Context context = null;
private View contentView = null;
private List<String> list=null;
private int size = 0;
private LayoutInflater nlayoutInflater;
private View popup = null;
public static PopupWindow myroutes_popupwin=null;
public MyRoutes(Context context , List<String> all , int actionbarsize) {
super(context);
this.context = context;
this.list=all;
this.size=actionbarsize;
getLayout();
}
private void getLayout() {
LayoutInflater layoutInflater = (LayoutInflater) context.getSystemService(Service.LAYOUT_INFLATER_SERVICE);
LinearLayout.LayoutParams layoutParams = new LinearLayout.
LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT);
layoutParams.topMargin = (int) ((1.0)*(int)(size));
layoutParams.leftMargin = (int)((0.0)*(int)(size));
layoutParams.bottomMargin=(int) ((0.0)*(int)(size));
layoutParams.rightMargin= (int)((0.0)*(int)(size));
contentView = layoutInflater.inflate(R.layout.myroutes, null);
contentView.setLayoutParams(layoutParams);
this.addView(contentView);
final ListView lv = (ListView) findViewById(R.id.navigation_routes);
ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(context,android.R.layout.simple_list_item_1, list);
lv.setAdapter(arrayAdapter);
Button close = (Button) findViewById(R.id.navigation_close_routes);
nlayoutInflater = (LayoutInflater) context.getSystemService(Service.LAYOUT_INFLATER_SERVICE);
popup = nlayoutInflater.inflate(R.layout.route, null);
final PopupWindow myroutes_popupwin = new PopupWindow(context);
myroutes_popupwin.setContentView(popup);
myroutes_popupwin.setWindowLayoutMode(
ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.WRAP_CONTENT);
// myroutes_popupwin=new PopupWindow(popup, LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
close.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(myroutes_popupwin.isShowing()){
myroutes_popupwin.dismiss();
}else{
contentView.setVisibility(View.GONE);
}
}
});
lv.setOnScrollListener(new OnScrollListener() {
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
// TODO Auto-generated method stub
myroutes_popupwin.dismiss();
}
@Override
public void onScroll(AbsListView view, int firstVisibleItem,
int visibleItemCount, int totalItemCount) {
// TODO Auto-generated method stub
myroutes_popupwin.dismiss();
}
});
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
String temp = list.get(position);
if(myroutes_popupwin.isShowing()){
myroutes_popupwin.dismiss();
}
try{
lv.setFocusableInTouchMode(true);
// doing some stuff to read item information.
// myroutes_popupwin.showAsDropDown(view);
myroutes_popupwin.showAtLocation(view, Gravity.CENTER, 0, 0);
TextView trailname = (TextView) findViewById(R.id.myroutes_name); // THIS IS where I have problem, the code is not able to read the textview
trailname.getText().toString();
}catch(Exception e){e.printStackTrace();}
}
});
}
}
这是弹出窗口的代码
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:paddingTop="0dp"
android:paddingRight="5dp"
android:paddingLeft="5dp"
android:background="#C0000000"
android:orientation="vertical" >
<TextView
android:id="@+id/myroutes_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Trail Name"
android:paddingBottom="2dp"
android:paddingLeft="5dp"
android:paddingRight="5dp"
android:paddingTop="5dp"
android:textStyle="italic" />
<TextView
android:id="@+id/textView5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:hint="Date"
android:textSize="15sp"
android:paddingBottom="5dp"
android:paddingLeft="5dp"
android:textStyle="italic"
android:paddingRight="5dp"
android:paddingTop="3dp"
android:text="Date" />
<TextView
android:id="@+id/textView2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Total Distance"
android:paddingBottom="5dp"
android:paddingLeft="5dp"
android:paddingRight="5dp"
android:paddingTop="10dp"
android:text="Total Distance"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textStyle="italic" />
<TextView
android:id="@+id/textView3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Average Speed"
android:paddingBottom="5dp"
android:paddingLeft="5dp"
android:paddingRight="5dp"
android:paddingTop="5dp"
android:text="Average Speed"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textStyle="italic" />
<TextView
android:id="@+id/textView4"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Duration"
android:paddingBottom="15dp"
android:paddingLeft="5dp"
android:paddingRight="5dp"
android:paddingTop="5dp"
android:text="Duration"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textStyle="italic" />
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:padding="0dp"
android:background="#00000000"
android:orientation="horizontal" >
<Button
android:id="@+id/myroutes_display"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:drawableTop="@drawable/add"
android:layout_marginLeft="1dp"
android:text="display"
android:paddingBottom="5dp"
android:textSize="10sp"
android:background="#00000000"
android:textColor="@color/AliceBlue"/>
<Button
android:id="@+id/imageButton2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:drawableTop="@drawable/add"
android:layout_marginLeft="1dp"
android:text="resume"
android:paddingBottom="5dp"
android:textSize="10sp"
android:background="#00000000"
android:textColor="@color/AliceBlue"/>
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:padding="0dp"
android:background="#00000000"
android:orientation="horizontal" >
<Button
android:id="@+id/imageButton3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:drawableTop="@drawable/add"
android:layout_marginLeft="1dp"
android:text="share"
android:paddingTop="5dp"
android:paddingBottom="10dp"
android:textSize="10sp"
android:background="#00000000"
android:textColor="@color/AliceBlue"/>
<Button
android:id="@+id/imageButton4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:drawableTop="@drawable/add"
android:layout_marginLeft="1dp"
android:text="delete"
android:paddingTop="5dp"
android:paddingBottom="10dp"
android:textSize="10sp"
android:background="#00000000"
android:textColor="@color/AliceBlue"/>
</LinearLayout>
</LinearLayout>
答案 0 :(得分：2)
您必须在ContentView上致电findViewById()并致电setText()更改您的内容。
TextView textView = (TextView) popup.getContentView().findViewById(R.id.textView_id);
textView.setText("New Content");
一个小提示：如果你在PopupWindow上设置了一个背景，你可以免费获得PopupWindow之外的触摸的解雇行为。
popup.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
答案 1 :(得分：0)
结帐AlertDialog或DialogFragment。这些应该比构建自己的弹出式解决方案更容易使用。