我试图使列表视图上的背景图像模糊,但是我尝试按照教程进行操作,但它不起作用.任何人都请指教,谢谢.
主要活动
public class IngredientCategoryMain extends Activity {
ListView list;
String[] title;
CategoryImageAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_ingredient_category_main);
list=(ListView)findViewById(R.id.listView);
title = getResources().getStringArray(R.array.titles);
adapter=new CategoryImageAdapter(this, mStrings, title);
list.setAdapter(adapter);
}
@Override
public void onDestroy() {
list.setAdapter(null);
super.onDestroy();
}
public View.OnClickListener listener=new View.OnClickListener() {
@Override
public void onClick(View arg0) {
adapter.imageLoader.clearCache();
adapter.notifyDataSetChanged();
}
};
public void onItemClick(int mPosition) {
String tempValues = title[mPosition];
Toast.makeText(IngredientCategoryMain.this, "Click on image "+tempValues+" to enter", Toast.LENGTH_LONG).show();
}
private String[] mStrings={
"https://pixabay.com/static/uploads/photo/2014/07/08/14/33/breads-387544_960_720.jpg",
"http://mtbev.org/wp-content/uploads/2014/02/Bottles.jpg",
"https://c2.staticflickr.com/8/7023/6548962149_7a9fdd9cf4_b.jpg",
"https://upload.wikimedia.org/wikipedia/commons/2/2f/Culinary_fruits_front_view.jpg",
"https://upload.wikimedia.org/wikipedia/commons/e/ea/Indian_Spices.jpg",
"https://pixabay.com/static/uploads/photo/2016/01/13/17/21/raw-1138562_960_720.jpg",
"https://pixabay.com/static/uploads/photo/2010/12/13/09/51/seed-1716_960_720.jpg",
"https://upload.wikimedia.org/wikipedia/commons/b/ba/Rice_grains_(IRRI).jpg",
"http://www.stock-free.org/images/Thanksgiving-Stock-Free-Image-08112015-image-239.jpg",
"https://pixabay.com/static/uploads/photo/2012/10/01/18/34/dips-58738_960_720.jpg",
"https://pixabay.com/static/uploads/photo/2013/07/19/00/18/seafood-165220_960_720.jpg",
"https://c1.staticflickr.com/3/2877/10866943666_471d9f2845_b.jpg"
};
}
我设计了listview的xml文件
android:layout_width="fill_parent"
android:layout_height="wrap_content">
android:layout_width="90dp"
android:layout_height="90dp"
android:id="@+id/imageButton2"
android:scaleType="fitXY"
android:layout_below="@+id/textView2"
android:layout_alignParentStart="true"
android:layout_alignParentEnd="true" />
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:id="@+id/textView2"
android:layout_marginLeft="20dp"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:textColor="#f7338b"
android:textStyle="bold"
android:background="#80ffffff" />
和listview.xml
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:context="com.example.cassieleong.delishcart.IngredientCategoryMain"
tools:showIn="@layout/activity_ingredient_category_main"
android:background="#fde7e7">
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/listView"
android:layout_alignParentTop="true"
android:layout_alignParentStart="true"
android:background="@drawable/appicon"/>
