到viewpager的左右导航不起作用 [英] left and right navigation to viewpager not working
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问题描述
我在我的应用程序中使用视图寻呼机，viewpager 工作完美，但我想添加 viewpagerindicator，以下是我的片段代码和 ui 设计的 xml 任何人都可以告诉我有什么问题吗?提前谢谢.............
I am using view pager in my app,viewpager is working perfect but i want to add viewpagerindicator,following is my snippet code and xml of ui design can any one tell me what is issue?thanks in advance.............
public class Test_Pager extends Activity{
private String strtd;
String[] imgStr;
ImageView imageView;
ArrayList<String> userImgArrayList;
String[] myURLs;
/*country list*/
JSONArray country_list=null;
private ServiceHandler sh;
private String jsonStr;
private JSONObject jsonObj;
private String user_img;
private String user_pro;
private static String PROFILE_VIEW_URL = "";
private static final String USER_IMG="product_images";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.test_pagerss);
userImgArrayList = getIntent().getStringArrayListExtra("user_images");
ViewPager viewPager = (ViewPager) findViewById(R.id.view_pager);
ImageAdapter adapter = new ImageAdapter(this);
viewPager.setAdapter(adapter);
// TitlePageIndicator titleIndicator = (TitlePageIndicator) findViewById(R.id.titles);
// titleIndicator.setViewPager(viewPager);
leftss=(ImageView)findViewById(R.id.lefticonsss);
rightss=(ImageView)findViewById(R.id.righticonsss);
imageView = (ImageView) findViewById(R.id.full_image_view);
PROFILE_VIEW_URL="";
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
sh = new ServiceHandler();
// Making a request to url and getting response
jsonStr = sh.makeServiceCall(PROFILE_VIEW_URL, ServiceHandler.GET);
Log.d("Response: ", "> " + jsonStr);
try {
jsonObj = new JSONObject(jsonStr);
/*proview_business = jsonObj.getString(PROFILE_VIEW_BUSINESS);
proview_subcat = jsonObj.getString(PROFILE_VIEW_SUB_CATAGORY);
proview_mainpro = jsonObj.getString(PROFILE_VIEW_MAINPRODUCTS);
proview_expr = jsonObj.getString(PROFILE_VIEW_EXPERIENCE);
proview_cmpname = jsonObj.getString(PROFILE_VIEW_COMPANYNAME);
proview_website = jsonObj.getString(PROFILE_VIEW_WEBSITE);*/
// user_img=jsonObj.getString(USER_IMG);
user_img=jsonObj.getString(USER_IMG);
user_img = "";
userImgArrayList = new ArrayList<String>();//declare userImgArrayList globally like ArrayList<String> userImgArrayList;
JSONArray picarray = jsonObj.getJSONArray(USER_IMG);
for(int i=0;i< picarray.length();i++)
{
user_img = picarray.getString(i);
userImgArrayList.add(user_img);
Log.d("mylog", "curent pro pic = " + user_img);
}
} catch (JSONException e) {
e.printStackTrace();
}
leftss.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
viewPager.setCurrentItem(+1,true);
}
});
}
public class ImageAdapter extends PagerAdapter {
Context context;
ImageAdapter(Context context)
{
this.context=context;
}
@Override
public int getCount() {
return USER_IMG.length();
}
@Override
public void destroyItem(View container, int position, Object object) {
((ViewPager) container).removeView((View) object);
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view == ((ImageView) object);
}
@Override
public Object instantiateItem(ViewGroup container, int position) {
ImageView imageView = new ImageView(context);
int padding = context.getResources().getDimensionPixelSize(
R.dimen.activity_horizontal_margin);
imageView.setPadding(padding, padding, padding, padding);
//imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
//Picasso.with(context).load(userImgArrayList.get(position)).into(imageView);
Picasso.with(context).load(userImgArrayList.get(position)).resize(200, 200) .into(imageView);
/*for(int i=0; i<myURLs.length;i++)
{
try {
url = new URL(myURLs[i]);
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
bmp = BitmapFactory.decodeStream(url.openConnection().getInputStream());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
imageView.setImageBitmap(bmp);
}
*/
// imageView.setImageURI(Uri.parse(imgStr[position]));
((ViewPager) container).addView(imageView, 0);
return imageView;
}
}
}
我的xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:background="@android:color/black"
android:gravity="center_horizontal"
>
<ImageView
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:src="@drawable/arrow"
android:rotation="180"
android:id="@+id/lefticonsss"
/>
<android.support.v4.view.ViewPager
android:id="@+id/view_pager"
android:layout_width="150dp"
android:layout_height="150dp"
/>
<ImageView android:id="@+id/full_image_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<ImageView
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:src="@drawable/arrow"
android:id="@+id/righticonsss"
/>
</LinearLayout>
推荐答案
我使用这个库 https://github.com/astuetz/PagerSlidingTabStrip
总结:
1. 在你的 onCreate 中执行此操作
1.do this in your onCreate
// Initialize the ViewPager and set an adapter
ViewPager pager = (ViewPager) findViewById(R.id.pager);
pager.setAdapter(new TestAdapter(getSupportFragmentManager()));
// Bind the tabs to the ViewPager
PagerSlidingTabStrip tabs = (PagerSlidingTabStrip) findViewById(R.id.tabs);
tabs.setViewPager(pager);
(可选)如果您将
OnPageChangeListener与ViewPager一起使用，则应将其设置在Widget而不是ViewPager直接.
(Optional) If you use an
OnPageChangeListenerwith yourViewPageryou should set it in theWidgetrather than on theViewPagerdirectly.
tabs.setOnPageChangeListener(mPageChangeListener);
这篇关于到viewpager的左右导航不起作用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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