我是初级Android开发人员并制作一个Android应用程序，用户可以在其中销售和购买物品。
我非常严重地请求帮助。
Here is the UI i am trying to make
我在这里制作水平图像滚动条。我已尝试使用线性布局中的ImageViews，回收器视图适配器（使用水平布局管理器），但它并没有解决我的问题。 基本上，此图像滚动视图中的图像来自不同的活动，也来自此（添加产品活动），用户可以从相机或图库中添加图像，也可以删除它... 所以我的问题是，有什么最简单的方法可以处理图像水平滚动吗？是否有任何图书馆可以使用，因此我可以在我的水平图像滚动视图中轻松管理图像？或者你喜欢的任何方法请跟我分享........... 致谢
答案 0 :(得分：0)
我认为你尝试了错误的东西，你应该尝试使用android ViewPager 对于您的问题，您应该查看this example ，以下是This Link
中查看页面的示例代码<强> main.xml中
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<HorizontalScrollView android:layout_width="fill_parent"
android:layout_height="wrap_content">
<LinearLayout android:id="@+id/_linearLayout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
</LinearLayout>
</HorizontalScrollView>
<android.support.v4.view.ViewPager android:id="@+id/_viewPager"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#000000"
android:visibility="gone" />
</RelativeLayout>
<强> cell.xml
<?xml version="1.0" encoding="UTF-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/linearLayout1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical" >
<ImageView android:id="@+id/_image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<TextView android:id="@+id/_imageName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"/>
</LinearLayout>
页面适配器CLass
import android.app.Activity;
import android.os.Parcelable;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.View;
import android.widget.ImageView;
public class GalleryPagerAdapter extends PagerAdapter {
private Activity activity;
private int[] drawableIDs;
public GalleryPagerAdapter(Activity activity,int[] drawableIDs){
this.activity = activity;
this.drawableIDs = drawableIDs;
}
@Override
public int getCount() {
return drawableIDs.length;
}
/**
* Create the page for the given position. The adapter is responsible
* for adding the view to the container given here, although it only
* must ensure this is done by the time it returns from
* {@link #finishUpdate()}.
*
* @param container The containing View in which the page will be shown.
* @param position The page position to be instantiated.
* @return Returns an Object representing the new page. This does not
* need to be a View, but can be some other container of the page.
*/
@Override
public Object instantiateItem(View collection, int position) {
ImageView imageView = new ImageView(activity);
imageView.setBackgroundResource(drawableIDs[position]);
((ViewPager) collection).addView(imageView,0);
return imageView;
}
/**
* Remove a page for the given position. The adapter is responsible
* for removing the view from its container, although it only must ensure
* this is done by the time it returns from {@link #finishUpdate()}.
*
* @param container The containing View from which the page will be removed.
* @param position The page position to be removed.
* @param object The same object that was returned by
* {@link #instantiateItem(View, int)}.
*/
@Override
public void destroyItem(View collection, int position, Object view) {
((ViewPager) collection).removeView((ImageView) view);
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view==((ImageView)object);
}
/**
* Called when the a change in the shown pages has been completed. At this
* point you must ensure that all of the pages have actually been added or
* removed from the container as appropriate.
* @param container The containing View which is displaying this adapter's
* page views.
*/
@Override
public void finishUpdate(View arg0) {}
@Override
public void restoreState(Parcelable arg0, ClassLoader arg1) {}
@Override
public Parcelable saveState() {
return null;
}
@Override
public void startUpdate(View arg0) {}
}
最后，活动
import android.app.Activity;
import android.os.Bundle;
import android.support.v4.view.ViewPager;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
public class TestingActivity extends Activity {
// mainLayout is the child of the HorizontalScrollView ...
private LinearLayout mainLayout;
// this is an array that holds the IDs of the drawables ...
private int[] images = {R.drawable.dd1, R.drawable.dd2,
R.drawable.dd3, R.drawable.dd4, R.drawable.dd5, R.drawable.dd6, R.drawable.dd7};
private View cell;
private TextView text;
private ViewPager viewPager;
@Override
public void onBackPressed() {
if(viewPager != null && viewPager.isShown()){
viewPager.setVisibility(View.GONE);
}
else{
super.onBackPressed();
}
}
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
viewPager = (ViewPager) findViewById(R.id._viewPager);
mainLayout = (LinearLayout) findViewById(R.id._linearLayout);
for (int i = 0; i < images.length; i++) {
cell = getLayoutInflater().inflate(R.layout.cell, null);
final ImageView imageView = (ImageView) cell.findViewById(R.id._image);
imageView.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
viewPager.setVisibility(View.VISIBLE);
viewPager.setAdapter
(new GalleryPagerAdapter(TestingActivity.this, images));
viewPager.setCurrentItem(v.getId());
}
});
imageView.setId(i);
text = (TextView) cell.findViewById(R.id._imageName);
imageView.setImageResource(images[i]);
text.setText("Image#"+(i+1));
mainLayout.addView(cell);
}
}
}
如果您不想使用ViewPager，那么您应该以水平方式尝试RecyclerView，使用RecyclerView，您可以使用自动位置检查实时添加和删除视图this tutorial for more help