Bild-Schieberegler zeigt nicht alle Folien an

Question

Ich entwickle einen Begrüßungsbildschirm, der vier Folien zeigen wird. Ich habe den Adapter erstellt und in der Aktivität festgelegt. Jedes Ding funktioniert gut, aber das Problem ist der Bildschirm zeigt nur erste und dritte Folie. Aber wenn ich manuell scrolle, kann ich alle Bildschirme sehen. Ich bin nicht in der Lage herauszufinden, warum dies geschieht.

Hier ist meine Aktivitätsklasse:

public class ProgramLandingActivity extends AppCompatActivity implements View.OnClickListener { 

    private String TAG = ProgramLandingActivity.class.getSimpleName(); 
    ActivityProgramLandingBinding binding; 
    private ViewPager viewPager; 
    private MyViewPagerAdapter myViewPagerAdapter; 
    private int[] layouts = { 
      R.drawable.slider3, 
      R.drawable.slider1, 
      R.drawable.slider2, 
      R.drawable.slider4}; 

    private int[] icons = { 
      R.drawable.note, 
      R.drawable.mic, 
      R.drawable.up_arrow, 
      R.drawable.weight}; 

    private String[] text = { 
      "Personalized Running Programs \n and flexible calender", 
      "Audio tips in Hindi and English \n From your mentors,\n Gul Panag and Milind Soman", 
      "Track your running, see achievements and share daily progress","includes weight loss and running performance nutrition plans"}; 

    private ArrayList<Integer> layoutArray = new ArrayList<Integer>(); 
    private ArrayList<Integer> layouticons = new ArrayList<Integer>(); 
    private ArrayList<String> layouttext = new ArrayList<String>(); 
    private static int currentPage = 0; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     binding = DataBindingUtil.setContentView(this,R.layout.activity_program_landing); 

     if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) { 
      getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS); 
     } 

     intializeViews(); 

     setAdapter(); 

    } 

    private void setAdapter() { 
     for (int i = 0; i < layouts.length; i++) { 
      layoutArray.add(layouts[i]); 
      layouticons.add(icons[i]); 
      layouttext.add(text[i]); 
      myViewPagerAdapter = new MyViewPagerAdapter(this, layoutArray,layouticons,layouttext); 
      viewPager.setAdapter(myViewPagerAdapter); 
      CirclePageIndicator indicator = (CirclePageIndicator) findViewById(R.id.indicator); 
      indicator.setViewPager(viewPager); 

      Log.d("laypou_length", String.valueOf(layouts.length)); 

     // Auto start of viewpager 
      final Handler handler = new Handler(); 
      final Runnable Update = new Runnable() { 
       public void run() { 
        if (currentPage == layouts.length) { 
         currentPage = 0; 
        } 
        viewPager.setCurrentItem(currentPage++, true); 
       } 
      }; 
      Timer swipeTimer = new Timer(); 
      swipeTimer.schedule(new TimerTask() { 
       @Override 
       public void run() { 
        handler.post(Update); 
       } 
      }, 2500, 2500); 

      indicator.setOnPageChangeListener(new ViewPager.OnPageChangeListener(){ 

       @Override 
       public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { 

       } 

       @Override 
       public void onPageSelected(int position) { 
        currentPage = position; 

       } 

       @Override 
       public void onPageScrollStateChanged(int state) { 

       } 
      }); 
     } 
    } 


    private void intializeViews() { 
     viewPager = (ViewPager) findViewById(R.id.view_pager); 

    } 

Meine Adapterklasse:

class MyViewPagerAdapter extends PagerAdapter { 


    private ArrayList<Integer> layouts; 
    private ArrayList<Integer> icons; 
    private ArrayList<String> text; 
    private LayoutInflater inflater; 
    private Context context; 

    public MyViewPagerAdapter(Context context,ArrayList<Integer> layouts, ArrayList<Integer> icons,ArrayList<String> text) { 
     this.context = context; 
     this.layouts=layouts; 
     this.icons = icons; 
     this.text=text; 
     inflater = LayoutInflater.from(context); 
    } 

    @Override 
    public Object instantiateItem(ViewGroup container, int position) { 

     View myImageLayout = inflater.inflate(R.layout.slider,container,false); 
     ImageView myImage = (ImageView) myImageLayout.findViewById(R.id.image1); 
     ImageView icon = (ImageView)myImageLayout.findViewById(R.id.icon); 
     TextViewWithFont slider_text = (TextViewWithFont)myImageLayout.findViewById(R.id.text_program_landing_body); 

     myImage.setImageResource(layouts.get(position)); 
     icon.setImageResource(icons.get(position)); 
     slider_text.setText(text.get(position)); 
     container.addView(myImageLayout, 0); 
     return myImageLayout; 
    } 

    @Override 
    public int getCount() { 
     return layouts.size(); 
    } 

    @Override 
    public boolean isViewFromObject(View view, Object object) { 
     return view == object; 
    } 

    @Override 
    public void destroyItem(ViewGroup container, int position, Object object) { 
     View view = (View) object; 
     container.removeView(view); 
    } 
} 

Kann mir jemand sagen, was ich falsch mache?

Answer 1

versuchen, diese Sie können für die automatische Scroll-Benutzer Zeit wie dieser

Timer timer; 
timer = new Timer(); 
timer.scheduleAtFixedRate(new RemindTask(), 0, 3000); // delay*/ 

private class RemindTask extends TimerTask { 
    int current = viewPager.getCurrentItem(); 

    @Override 
    public void run() { 
     runOnUiThread(new Runnable() { 
      public void run() { 

       if (current < layouts.length) { 
        viewPager.setCurrentItem(current); 
        current += 1; 
       } else { 
        timer.cancel(); 
       } 
      } 
     }); 

    } 
} 

Answer 2

wie das Problem Looks ist in der Put-Drucke ‚viewpager.setCurrentPage‘ für die ‚current‘ dort und sehen, ob es zweimal angerufen werden.

Lassen Sie mich die Beobachtung in den Kommentaren wissen. Prost :)