添加图片序号显示位置设置

Author: albert-lii

app/src/main/java/com/liyi/example/PicActivity.java

@@ -65,6 +65,7 @@ public void onItemClick(int i, View view) {
                     imageViewer = ImageViewer.newInstance();
                 }
                 imageViewer.setLocations(mRects)
+                        .setIndexGravity(ImageViewer.BOTTOM)
                         .setResources(i, mList, PicActivity.this)
                         .show(getSupportFragmentManager(), "pic");
             }

image-viewer/src/main/java/com/liyi/viewer/ImageViewer.java

@@ -14,6 +14,7 @@
 import android.support.v4.app.DialogFragment;
 import android.support.v4.view.ViewPager;
 import android.util.DisplayMetrics;
+import android.view.Gravity;
 import android.view.KeyEvent;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -33,6 +34,9 @@
  * A control for viewing images
  */
 public class ImageViewer extends DialogFragment implements DialogInterface.OnKeyListener {
+    public static final int TOP = 0;
+    public static final int BOTTOM = 1;
+
     private View contentView;
     private View v_bg;
     private PhotoView photoVi_current;
@@ -44,6 +48,7 @@ public class ImageViewer extends DialogFragment implements DialogInterface.OnKey
     private List<View> mViews;
     private ViewGroup.LayoutParams mCurrentParams;
 
+    private int mIndexGravity = TOP;
     // The location of the image on the screen
     private List<Rect> mLocations;
     // The sequence number of the first picture shown
@@ -84,6 +89,14 @@ private void initUI() {
             mAdapter.setData(mViews);
             viewpager.setAdapter(mAdapter);
             viewpager.setCurrentItem(mBeginIndex);
+            if (mViews.size() > 1) {
+                tv_index.setText((mBeginIndex + 1) + "/" + mViews.size());
+                if (mIndexGravity == BOTTOM) {
+                    tv_index.setGravity(Gravity.BOTTOM);
+                }
+            } else {
+                tv_index.setVisibility(View.GONE);
+            }
         }
     }
 
@@ -239,6 +252,17 @@ public void onPhotoTap(View view, float x, float y) {
         return this;
     }
 
+    /**
+     * Set the location of the image serial number
+     *
+     * @param gravity
+     * @return
+     */
+    public ImageViewer setIndexGravity(int gravity) {
+        mIndexGravity = gravity;
+        return this;
+    }
+
     /**
      * Zoom in to full-screen animation
      */
@@ -283,7 +307,6 @@ public void onAnimationUpdate(ValueAnimator animation) {
                     if (fraction == 1) {
                         if (mViews.size() > 1) {
                             tv_index.setVisibility(View.VISIBLE);
-                            tv_index.setText((mBeginIndex + 1) + "/" + mViews.size());
                         } else {
                             tv_index.setVisibility(View.GONE);
                         }

image-viewer/src/main/res/layout/dlgfmt_image_viewer.xml

@@ -20,6 +20,7 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="top|center_horizontal"
+        android:layout_marginBottom="10dp"
         android:layout_marginTop="10dp"
         android:textColor="@color/white"
         android:textSize="18sp"