图片浏览器完成

app/src/main/java/cn/yunliyunwai/beyondclouds/ui/common/PhotoViewerActivity.java

@@ -12,6 +12,7 @@ import androidx.appcompat.app.AppCompatActivity;
 import androidx.fragment.app.Fragment;
 import androidx.fragment.app.FragmentManager;
 import androidx.fragment.app.FragmentPagerAdapter;
+import androidx.viewpager.widget.ViewPager;
 
 import com.bumptech.glide.Glide;
 
@@ -20,11 +21,13 @@ import cn.yunliyunwai.beyondclouds.databinding.FragmentPhotoBinding;
 
 public class PhotoViewerActivity extends AppCompatActivity {
 
-    public static final String ARGS_PHOTO_LINKS = "PHOTO_LINKS";
+    public static final String ARG_PHOTO_LINKS = "PHOTO_LINKS";
+    public static final String ARG_CURRENT_INDEX = "CURRENT_INDEX";
 
     ActivityPhotoviewerBinding binding;
 
     private String[] mPhotos;
+    private int mCurrentIndex;
 
     @Override
     protected void onCreate(@Nullable Bundle savedInstanceState) {
@@ -33,10 +36,30 @@ public class PhotoViewerActivity extends AppCompatActivity {
         setContentView(binding.getRoot());
 
         Intent intent = getIntent();
-        mPhotos = intent.getStringArrayExtra(ARGS_PHOTO_LINKS);
+        mPhotos = intent.getStringArrayExtra(ARG_PHOTO_LINKS);
+        mCurrentIndex = intent.getIntExtra(ARG_CURRENT_INDEX, 0);
+        binding.txtCurrentIndex.setText((mCurrentIndex + 1) + "");
+        binding.txtImgCount.setText(mPhotos.length + "");
 
         PhotosPagerAdapter adapter = new PhotosPagerAdapter(getSupportFragmentManager(), mPhotos);
         binding.viewPager.setAdapter(adapter);
+        binding.viewPager.setCurrentItem(mCurrentIndex);
+        binding.viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
+            @Override
+            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
+
+            }
+
+            @Override
+            public void onPageSelected(int position) {
+                binding.txtCurrentIndex.setText((position + 1) + "");
+            }
+
+            @Override
+            public void onPageScrollStateChanged(int state) {
+
+            }
+        });
     }
 
     public static class PhotosPagerAdapter extends FragmentPagerAdapter {

app/src/main/java/cn/yunliyunwai/beyondclouds/ui/handler/NavHandlers.java

@@ -207,9 +207,10 @@ public class NavHandlers {
         view.getContext().startActivity(intent);
     }
 
-    public static void toPhotoViewer(View view, String[] photoLinks) {
+    public static void toPhotoViewer(View view, String[] photoLinks, int currentIndex) {
         Intent intent = new Intent(view.getContext(), PhotoViewerActivity.class);
-        intent.putExtra(PhotoViewerActivity.ARGS_PHOTO_LINKS, photoLinks);
+        intent.putExtra(PhotoViewerActivity.ARG_PHOTO_LINKS, photoLinks);
+        intent.putExtra(PhotoViewerActivity.ARG_CURRENT_INDEX, currentIndex);
         view.getContext().startActivity(intent);
     }
 }

app/src/main/java/cn/yunliyunwai/beyondclouds/view/DynamicGridLayout.java

@@ -128,10 +128,11 @@ public class DynamicGridLayout extends ViewGroup {
             int left = computePosition(currentCol, imageSize) + getPaddingLeft();
             int top = computePosition(currentRow, imageSize) + getPaddingTop();
             imageView.layout(left, top, left + imageSize, top + imageSize);
+            final int currentIndex = i;
             imageView.setOnClickListener(new OnClickListener() {
                 @Override
                 public void onClick(View v) {
-                    NavHandlers.toPhotoViewer(v, mImgUrls.toArray(new String[0]));
+                    NavHandlers.toPhotoViewer(v, mImgUrls.toArray(new String[0]), currentIndex);
                 }
             });
         }

app/src/main/res/layout/activity_photoviewer.xml

 <?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout
-    android:background="#000000"
-    xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
-    android:layout_height="match_parent">
+<androidx.constraintlayout.widget.ConstraintLayout android:background="#000000"
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
 
     <androidx.viewpager.widget.ViewPager
         android:id="@+id/view_pager"
         android:layout_width="match_parent"
         android:layout_height="match_parent" />
 
+    <LinearLayout
+        android:id="@+id/img_indicator"
+        app:layout_constraintStart_toStartOf="@id/view_pager"
+        app:layout_constraintEnd_toEndOf="@id/view_pager"
+        app:layout_constraintBottom_toBottomOf="@id/view_pager"
+        android:layout_marginBottom="10dp"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal">
+        <TextView
+            android:id="@+id/txt_current_index"
+            android:text="1"
+            android:textSize="24dp"
+            android:typeface="serif"
+            android:textColor="@color/colorWhite"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"/>
+        <TextView
+            android:text="/"
+            android:textColor="#f2f2f2"
+            android:typeface="serif"
+            android:textSize="16dp"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"/>
+        <TextView
+            android:id="@+id/txt_img_count"
+            android:text="9"
+            android:typeface="serif"
+            android:textColor="#f2f2f2"
+            android:textSize="14dp"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"/>
+    </LinearLayout>
 </androidx.constraintlayout.widget.ConstraintLayout>
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