Question

我想添加一个按钮和按钮Clicklistenner。我无法找到添加按钮的位置，当我点击按钮时，我想更改imageview（查看器区域）的透明度并更改位置文本并显示它。

public class SlideshowDialogFragment extends DialogFragment {
    private String TAG = SlideshowDialogFragment.class.getSimpleName();
    private ArrayList<Image> images;
    private ViewPager viewPager;
    private MyViewPagerAdapter myViewPagerAdapter;
    private TextView lblCount, lblTitle, lblDate;
    private int selectedPosition = 0;
    private AdView mAdView;
    private Button button;

    static SlideshowDialogFragment newInstance() {
        SlideshowDialogFragment f = new SlideshowDialogFragment();
        return f;
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.fragment_image_slider, container, false);
        viewPager = (ViewPager) v.findViewById(R.id.viewpager);
        lblCount = (TextView) v.findViewById(R.id.lbl_count);
        lblTitle = (TextView) v.findViewById(R.id.title);
        lblDate = (TextView) v.findViewById(R.id.date);
        button = (Button) v.findViewById(R.id.button); 

        mAdView = (AdView) v.findViewById(R.id.adView2);
        AdRequest adRequest = new AdRequest.Builder()
                .build();
        mAdView.loadAd(adRequest);

        images = (ArrayList<Image>) getArguments().getSerializable("images");
        selectedPosition = getArguments().getInt("position");

        Log.e(TAG, "position: " + selectedPosition);
        Log.e(TAG, "images size: " + images.size());

        myViewPagerAdapter = new MyViewPagerAdapter();
        viewPager.setAdapter(myViewPagerAdapter);
        viewPager.addOnPageChangeListener(viewPagerPageChangeListener);

        setCurrentItem(selectedPosition);

        //Toast start
        Context context = v.getContext();
        CharSequence text = "Hello Click Fragment!";
        int duration = Toast.LENGTH_SHORT;

        Toast toast = Toast.makeText(context, text, duration);
        toast.show();
        //Toast finish

        return v;



    }

    private void setCurrentItem(int position) {
        viewPager.setCurrentItem(position, false);
        displayMetaInfo(selectedPosition);
    }

    //  page change listener
    ViewPager.OnPageChangeListener viewPagerPageChangeListener = new ViewPager.OnPageChangeListener() {

        @Override
        public void onPageSelected(int position) {
            displayMetaInfo(position);
        }

        @Override
        public void onPageScrolled(int arg0, float arg1, int arg2) {

        }

        @Override
        public void onPageScrollStateChanged(int arg0) {

        }
    };

    private void displayMetaInfo(int position) {
        lblCount.setText("<  "+  (position + 1) + " of " + images.size()+"   >");

        Image image = images.get(position);
        lblTitle.setText(image.getName());
        lblDate.setText(image.getTimestamp());

    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setStyle(DialogFragment.STYLE_NORMAL, android.R.style.Theme_Black_NoTitleBar_Fullscreen);

    }


    //  adapter
    public class MyViewPagerAdapter extends PagerAdapter {

        private LayoutInflater layoutInflater;

        public MyViewPagerAdapter() {
        }

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

            layoutInflater = (LayoutInflater) getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            View view = layoutInflater.inflate(R.layout.image_fullscreen_preview, container, false);

            ImageView imageViewPreview = (ImageView) view.findViewById(R.id.image_preview);

            Image image = images.get(position);

            Glide.with(getActivity()).load(image.getLarge())
                    .thumbnail(0.5f)
                    .crossFade()
                    .diskCacheStrategy(DiskCacheStrategy.ALL)
                    .into(imageViewPreview);

            container.addView(view);

            return view;
        }

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

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


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

布局XML：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:ads="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="bottom">

    <android.support.v4.view.ViewPager
        android:id="@+id/viewpager"
        android:layout_width="match_parent"
        android:layout_height="400dp"
        android:background="@android:color/black" />

    <TextView
        android:id="@+id/lbl_count"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="20dp"
        android:textColor="@android:color/white"
        android:textSize="16dp"z
        android:textStyle="bold" />

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Button" />

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_below="@+id/viewpager"
        android:background="@color/colorPrimaryDark"
        android:padding="10dp">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">

            <com.google.android.gms.ads.AdView
                android:id="@+id/adView2"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_alignParentBottom="true"
                android:layout_centerHorizontal="true"
                android:layout_marginTop="15dp"
                ads:adSize="BANNER"
                ads:adUnitId="@string/banner_home_footer">
      </com.google.android.gms.ads.AdView>

            <TextView
                android:id="@+id/title"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_margin="10dp"
                android:textColor="@android:color/white"
                android:textSize="16dp"
                android:textStyle="bold" />

            <TextView
                android:id="@+id/date"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_alignParentBottom="true"
                android:layout_alignParentLeft="true"
                android:layout_margin="10dp"
                android:textColor="@android:color/white" />

        </LinearLayout>
    </ScrollView>

</RelativeLayout>

Answer 1

要添加OnClickListener，您应该在onCreateView函数的按钮上使用函数setOnClickListener。

片段和添加按钮单击

1 个答案: