我以线性布局动态填充了图像，该图像放置在Horizontal Scrollview中。我启用了自动滚动水平滚动视图的功能，延迟了1分钟。我已经将左右填充设置为水平滚动视图，因为它是从屏幕中央出现的，并滚动到左侧并在屏幕中央结束。自动滚动效果很好。我的问题是，当我单击滚动视图中的图像时，需要将该图像移到屏幕中央，然后继续自动滚动。我已经从问题Android : Locating the item at center position of the screen after selecting it ,In the horizontalscrollview的答案中搜索并找到答案来放置单击的项目中心。但就我而言，点击的项目并没有居中。
final int duration = 1000;
final int pixelsToMove = 50;
private final Handler mHandler = new Handler(Looper.getMainLooper());
private final Runnable SCROLLING_RUNNABLE = new Runnable() {
@Override
public void run() {
horizontalScrollView1.smoothScrollBy(pixelsToMove, 0);
mHandler.postDelayed(this, duration);
}
};
HorizontalScrollView horizontalScrollView1 = (HorizontalScrollView) findViewById(R.id.horizontalScrollView1);
LinearLayout layLandmarks = (LinearLayout) findViewById(R.id.layLandmarks);
final ImageView[] dynamic_imageView = new ImageView[jsonArray.length()];
for (int i = 0; i < jsonArray.length(); i++) {
dynamic_imageView[i] = new ImageView(Activity.this);
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(70, 70);
dynamic_imageView[i].setLayoutParams(lp);
Glide.with(Activity.this)
.load(imageUrl)
.override(30, 30)
.error(R.drawable.button_white_color1)
.into(dynamic_imageView[i]);
dynamic_imageView[i].setId(i);
dynamic_imageView[i].setTag("landmarkName");
layLandmarks.addView(dynamic_imageView[i], i);
horizontalScrollView1.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
int padding = getResources().getDisplayMetrics().widthPixels / 2;
horizontalScrollView1.setPadding(padding, 0, padding, 0);
horizontalScrollView1.setClipToPadding(false);
}
});
Display display = getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
final int width = size.x;
dynamic_imageView[i].setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
int center = (width - dynamic_imageView[i].getWidth())/2;
horizontalScrollView1.scrollTo(dynamic_imageView[i].getLeft() - center, dynamic_imageView[i].getTop());
}
});
}
mHandler.postDelayed(SCROLLING_RUNNABLE, 100);
添加我的布局文件：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/black_transparent_background">
<VideoView
android:id="@+id/videoView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center" />
<Button
android:id="@+id/btnBack"
android:layout_width="15dp"
android:layout_height="20dp"
android:layout_marginLeft="10dp"
android:layout_marginTop="25dp"
android:background="@drawable/back_arrow" />
<TextView
android:id="@+id/txtEventTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginTop="25dp"
android:layout_toRightOf="@id/btnBack"
android:text="Santa Rosa Marathon"
android:textColor="@color/white"
android:textSize="@dimen/text_24" />
<Button
android:id="@+id/btnCamera"
android:layout_width="50dp"
android:layout_height="30dp"
android:layout_alignParentRight="true"
android:layout_margin="20dp"
android:background="@drawable/camera_icon_white" />
<RelativeLayout
android:id="@+id/laySeekbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true">
<RelativeLayout
android:id="@+id/seekBarLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="5dp"
android:layout_marginLeft="17dp"
android:layout_marginRight="17dp"
android:background="@drawable/seekbar_layout_background">
<SeekBar
android:id="@+id/seekBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:progressBackgroundTint="@color/white"
android:thumb="@drawable/seekbar_thumb"
android:visibility="gone"
/>
</RelativeLayout>
<HorizontalScrollView
android:id="@+id/horizontalScrollView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_gravity="center_horizontal"
android:fillViewport="true"
android:scrollbars="none">
<LinearLayout
android:id="@+id/layLandmarks"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@android:color/transparent"
android:orientation="horizontal">
</LinearLayout>
</HorizontalScrollView>
</RelativeLayout>
<RelativeLayout
android:id="@+id/laySeekbarText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/btnCircle"
android:layout_centerInParent="true"
android:layout_marginBottom="5dp"
android:background="@drawable/seekbar_text_back">
<TextView
android:id="@+id/seekBarProgressValue"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:gravity="center"
android:padding="2dp"
android:text="0 mi"
android:textColor="@color/black" />
<TextView
android:id="@+id/txtVideoElevationValue"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/seekBarProgressValue"
android:layout_centerHorizontal="true"
android:padding="2dp"
android:text="0 sqft"
android:textColor="@color/black" />
</RelativeLayout>
<Button
android:id="@+id/btnCircle"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_alignParentBottom="true"
android:layout_centerInParent="true"
android:background="@drawable/seekbar_thumb" />
<Button
android:id="@+id/btnStart"
android:layout_width="20dp"
android:layout_height="30dp"
android:layout_alignParentBottom="true"
android:layout_centerInParent="true"
android:background="@drawable/start_icon" />
<ProgressBar
android:id="@+id/videoProgress"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:visibility="gone" />
</RelativeLayout>