Android Custom Spinner and its drop-down window

Http://www.cnblogs.com/coding-way/p/3549865.html

Present effect:

Custom spinner actually consists of two parts:

The first part is used to open the drop-down list of buttons, this green background directly set spinner background on the line, the material file as follows:

Note that the text in the spinner control does not directly modify the text interface, the text is actually set in the adapter, for example:

arrayadapter<string> adapter = new Arrayadapter<string> (GetContext (),

R.layout.spinner_checked_text, gradelist);

Gradespinner.setadapter (adapter);

The implementation of this spinner_checked_text.xml is as follows:

<?xml version= "1.0" encoding= "Utf-8"? ><checkedtextview xmlns:android= "Http://schemas.android.com/apk/res /android "    android:id=" @android: Id/text1 "    android:layout_width=" match_parent "    android:layout_height = "Wrap_content"    android:gravity= "center_vertical"    android:padding= "10DP"    android:singleline= "true"    android:textcolor= "@color/text_green"    android:textsize= "20SP" ></CheckedTextView>

It must be checkedtextview, or it will go wrong.

The second part is the pull-out window, this is the Getdropdownview () method of the replication Arrayadapter to achieve, the code is as follows:

        arrayadapter<string> adapter = new Arrayadapter<string> (GetContext (), R.layout.spinner_                    Checked_text, gradelist) {@Override public view getdropdownview (int position, view Convertview,                        ViewGroup parent) {View view = Inflate (GetContext (), R.layout.spinner_item_layout,                NULL);                TextView label = (TextView) view. Findviewbyid (R.id.spinner_item_label);                ImageView check = (ImageView) view. Findviewbyid (R.id.spinner_item_checked_image);                Label.settext (Gradelist.get (position)); if (gradespinner.getselecteditemposition () = = position) {View.setbackgroundcolor (Getresources (). Getcol                    or (R.color.spinner_green));                Check.setimageresource (r.drawable.check_selected); } else {View.setbackgroundColor (Getresources (). GetColor (R.color.spinner_light_green));                Check.setimageresource (R.drawable.check_unselect);            } return view;        }        }; Adapter.setdropdownviewresource (r.layout.spinner_item_layout);

The contents of Spinner_item_layout.xml are as follows:

<?xml version= "1.0" encoding= "Utf-8"? ><relativelayout xmlns:android= "http://schemas.android.com/apk/res/ Android "    android:layout_width=" match_parent "    android:layout_height=" Match_parent "    android: background= "@color/spinner_light_green"    android:padding= "15DP" >    <textview        android:id= "@+id/ Spinner_item_label "        android:layout_width=" wrap_content "        android:layout_height=" Wrap_content        " Android:layout_alignparentleft= "true"        android:layout_centervertical= "true"        android:textcolor= "@color/ Text_green "        android:textsize=" 17sp "/>    <imageview        android:id=" @+id/spinner_item_checked_ Image "        android:layout_width=" wrap_content "        android:layout_height=" wrap_content "        android:layout_ Alignparentright= "true"        android:layout_centervertical= "true"        android:src= "@drawable/check_unselect"/ ></RelativeLayout>

Android Custom Spinner and its drop-down window