我有ViewPager每页显示两个项目，即我将getPageWidth设置为0.5fI需要在每个ViewPager项目上设置灰色圆角背景加载的图像从数据库中获取并位于背景上。我已经尝试将背景属性放在ViewPager本身和ImageView上，但他们所做的就是在整个ViewPager上设置一个静态的完整背景。请帮助实现这一目标。
以下是我的代码：
public class LandingPageAdapter extends PagerAdapter {
private Context mContext;
private ArrayList<String> drinkName, drinkCost, drinkImage, staffPick, bestSeller, trending;
public LandingPageAdapter(Context context, ArrayList<String> drinkName,ArrayList<String> drinkCost,
ArrayList<String> drinkImage, ArrayList<String> staffPick,
ArrayList<String> bestSeller, ArrayList<String> trending) {
mContext = context;
this.drinkName = drinkName;
this.drinkCost = drinkCost;
this.drinkImage = drinkImage;
this.staffPick = staffPick;
this.bestSeller = bestSeller;
this.trending = trending;
}
@Override
public Object instantiateItem(ViewGroup container, final int position) {
LayoutInflater inflater = LayoutInflater.from(mContext);
View itemView = inflater.inflate(R.layout.page, container, false);
final ImageView image1 = (ImageView)itemView.findViewById(R.id.image);
TextView textName = (TextView) itemView.findViewById(R.id.name);
TextView textCost = (TextView) itemView.findViewById(R.id.cost);
// image1.setImageResource(images[position]);
Log.d("imagess","http://159.203.104.154/shikatei/products/landingpage/"+drinkImage.get(position));
Log.d("trends",staffPick.get(position)+"|"+bestSeller.get(position)+"|"+trending.get(position));
Picasso.with(mContext)
.load("http://159.203.104.154/shikatei/products/landingpage/"+drinkImage.get(position))
.placeholder(R.drawable.bg111)
.resize(1800,3000)
.networkPolicy(NetworkPolicy.OFFLINE)
.into(image1, new Callback() {
@Override
public void onSuccess() {
Log.d("succ","succ");
}
@Override
public void onError() {
Log.d("err","err");
//Try again online if cache failed
Picasso.with(mContext)
.load("http://159.203.104.154/shikatei/products/landingpage/"+drinkImage.get(position))
.error(R.drawable.bg111)
.resize(1800,3000)
.into(image1, new Callback() {
@Override
public void onSuccess() {
}
@Override
public void onError() {
Log.v("Picasso","Could not fetch image");
}
});
}
});
textName.setText(drinkName.get(position));
textCost.setText("Ksh "+drinkCost.get(position));
((ViewPager) container).addView(itemView);
return itemView;
}
@Override
public void destroyItem(ViewGroup container, int position,
Object object) {
container.removeView((View)object);
}
@Override
public int getCount() {
return(5);
}
@Override
public float getPageWidth(int position) {
return(0.5f);
}
@Override
public boolean isViewFromObject(View view, Object object) {
return(view == object);
}
}
public class ImageTask extends AsyncTask<String,String, List<SpaceModel> > {
@Override
protected void onPreExecute() {
super.onPreExecute();
// dialog.show();
}
@Override
protected List<SpaceModel> doInBackground(String... params) {
HttpURLConnection connection = null;
BufferedReader reader = null;
try {
Log.d("activity: ", "SignInActivity");
URL url = new URL(params[0]);
connection = (HttpURLConnection) url.openConnection();
connection.connect();
InputStream stream = connection.getInputStream();
reader = new BufferedReader(new InputStreamReader(stream));
StringBuffer buffer = new StringBuffer();
String line ="";
while ((line = reader.readLine()) != null){
buffer.append(line);
}
String finalJson = buffer.toString();
JSONObject parentObject = new JSONObject(finalJson);
JSONArray parentArray = parentObject.getJSONArray("spaces");
List<SpaceModel> spaceModelList = new ArrayList<>();
Gson gson = new Gson();
for(int i=0; i<parentArray.length(); i++) {
JSONObject finalObject = parentArray.getJSONObject(i);
/**
* below single line of code from Gson saves you from writing the json parsing yourself which is commented below
*/
SpaceModel spaceModel = gson.fromJson(finalObject.toString(), SpaceModel.class);
spaceModelList.add(spaceModel);
}
return spaceModelList;
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
} finally {
if(connection != null) {
connection.disconnect();
}
try {
if(reader != null) {
reader.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
@Override
protected void onPostExecute(final List<SpaceModel> result) {
super.onPostExecute(result);
// dialog.dismiss();
int arrayCount = 0;
if(result != null) {
int count = 0;
Iterator<Map.Entry> iterator = loc.entrySet().iterator();
while (iterator.hasNext()) {
Map.Entry entry = (Map.Entry) iterator.next();
String value = (String) entry.getValue();
System.out.println("Key : " + entry.getKey() + " Value :" + entry.getValue());
String[] parts = value.split(";");
topPicksName.add(parts[1]);
topPicksCost.add(parts[2]);
topPicksImage.add(parts[3]);
staffPick.add(parts[4]);
bestSeller.add(parts[5]);
trending.add(parts[6]);
}
topPicksPager=(ViewPager) rootView.findViewById(R.id.top_picks_pager);
topPicksPager.setAdapter(new LandingPageAdapter(getActivity(), topPicksName,
topPicksCost, topPicksImage, staffPick, bestSeller, trending));
if (isNetworkAvailable() == true){
} else {
showInternetDialog();
}
} else {
Toast.makeText(getActivity(), "Not able to fetch data from server, please check url.", Toast.LENGTH_SHORT).show();
}
}
}
Page xml：
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical">
<ImageView
android:id="@+id/image"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<app.android.taji.com.drinkdelivery.layout.GalleryTextView
android:id="@+id/name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="13dp"
android:layout_marginTop="235dp"
android:gravity="center"
android:text="Tito's Handmade Vodka"/>
<app.android.taji.com.drinkdelivery.layout.GalleryTextView
android:id="@+id/cost"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="13dp"
android:layout_marginTop="250dp"
android:gravity="center"
android:text="$18.99 - $26.99"/>
</FrameLayout>
ViewPager xml：
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:vpi="http://schemas.android.com/tools"
android:orientation="vertical">
<ScrollView
android:id="@+id/scrollView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:fillViewport="true"
android:orientation="vertical" >
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:custom="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<com.daimajia.slider.library.SliderLayout
android:id="@+id/slider"
android:layout_width="wrap_content"
android:layout_height="230dp"/>
<com.daimajia.slider.library.Indicators.PagerIndicator
android:id="@+id/custom_indicator"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
custom:selected_color="#0095BF"
custom:unselected_color="#55333333"
custom:shape="oval"
/>
<com.daimajia.slider.library.Indicators.PagerIndicator
android:id="@+id/custom_indicator2"
style="@style/AndroidImageSlider_Corner_Oval_Orange"
android:layout_centerHorizontal="true"
android:layout_alignParentBottom="true"
/>
</LinearLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="@+id/top_picks_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingLeft="10dp"
android:paddingTop="15dp"
android:paddingBottom="5dp"
android:text="Top Picks"/>
<android.support.v4.view.ViewPager
android:id="@+id/top_picks_pager"
android:layout_width="match_parent"
android:layout_below="@+id/top_picks_text"
android:background="#000000"
android:layout_height="270dp"/>
<TextView
android:id="@+id/top_collections_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingBottom="5dp"
android:paddingTop="15dp"
android:paddingLeft="10dp"
android:layout_below="@+id/top_picks_pager"
android:text="Collections For You"/>
<android.support.v4.view.ViewPager
android:id="@+id/collections_pager"
android:layout_width="match_parent"
android:layout_below="@id/top_collections_text"
android:layout_height="200dp"/>
</RelativeLayout>
</LinearLayout>
</ScrollView>
</RelativeLayout>