Android 水平滚动图片库

Question

我想创建带有水平图片库的应用程序（一行和多列）。 首先我尝试使用gridview，但它只能用作垂直滚动。 我可以为此目的使用ListView 或GridView 吗？

Answer 1

使用 Horizo​​ntalScrollView 而不是 ListView 或 GirdView http://developer.android.com/reference/android/widget/HorizontalScrollView.html

Answer 2

TwoWayView 对我很有效。 https://github.com/lucasr/twoway-view/

Answer 3

HorizontalScrollView Documentation

要使用 Horizo​​ntalScrollView，您应该只有一个孩子。我之前使用它的方法是创建一个 TableLayout 并将图像添加到 TableRows 中。 TableLayout 可以有很多行或只有 1 行和很多列。

您可以将 ImageViews（或任何其他视图）添加到每一行，然后最后将 TableRow 添加到 TableLayout。完成 TableLayout 后，您需要做的就是：

    //createTable method is where you would loop through the images to add
    TableLayout table = createTable(rowCount, columnCount);
    HorizontalScrollView hozView = new HorizontalScrollView(this);
    hozView.addView(table);
    setContentView(hozView);

Answer 4

在 Horizo​​ntalScrollView 中创建 LinearLayout，然后动态创建 imageView 并将该 imageview 添加到 linearLayout。

示例代码：

<HorizontalScrollView 
android:id="@+id/horizontal_scroll"
android:layout_width="match_parent"
android:layout_height="wrap_content" >

    <LinearLayout
    android:id="@+id/linear"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="horizontal" >
    </LinearLayout>

</HorizontalScrollView>

在onCreate()方法中，从xml文件中获取linearLayout的id，并将动态创建的ImageView添加到linearlayout中：

    LinearLayout layout = (LinearLayout) findViewById(R.id.linear);
    for (int i = 0; i < 10; i++) {
        ImageView imageView = new ImageView(this);
        imageView.setId(i);
        imageView.setPadding(2, 2, 2, 2);
        imageView.setImageBitmap(BitmapFactory.decodeResource(
                getResources(), R.drawable.ic_launcher));
        imageView.setScaleType(ScaleType.FIT_XY);
        layout.addView(imageView);
    }

Answer 5

由于我们no longer have Gallery 小部件需要一点 DIY 噪音。您可以使用HorizontalScrollView 和嵌套的LinearLayout 创建一个水平滚动的缩略图条，并从您的活动中动态添加图像：

<HorizontalScrollView
    android:layout_width="match_parent"
    android:layout_height="72dp"
    android:layout_gravity="bottom"
    android:background="@color/black">
    <LinearLayout
        android:id="@+id/thumbnails"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:gravity="center_vertical"
        android:orientation="horizontal"
        android:paddingTop="2dp"/>
</HorizontalScrollView>

以下代码取自本教程：http://sourcey.com/android-horizontally-scrolling-pan-scan-and-zoom-image-gallery/ GalleryActivity 实现了您正在寻找的内容，并通过添加用于显示所选图像的ViewPager 元素和SubsamplingScaleImageView 来扩展您的请求，以便您可以平移、扫描和缩放所选图像：

package com.sourcey.imagegallerydemo;

import android.content.Context;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.support.v4.view.PagerAdapter;
import android.support.v7.app.AppCompatActivity;
import android.support.v4.view.ViewPager;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.LinearLayout;

import com.bumptech.glide.Glide;
import com.bumptech.glide.request.animation.GlideAnimation;
import com.bumptech.glide.request.target.SimpleTarget;
import com.davemorrissey.labs.subscaleview.ImageSource;
import com.davemorrissey.labs.subscaleview.SubsamplingScaleImageView;

import junit.framework.Assert;

import java.util.ArrayList;

import butterknife.ButterKnife;
import butterknife.InjectView;

public class GalleryActivity extends AppCompatActivity {
    public static final String TAG = "GalleryActivity";
    public static final String EXTRA_NAME = "images";

    private ArrayList<String> _images;
    private GalleryPagerAdapter _adapter;

    @InjectView(R.id.pager) ViewPager _pager;
    @InjectView(R.id.thumbnails) LinearLayout _thumbnails;
    @InjectView(R.id.btn_close) ImageButton _closeButton;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_gallery);
        ButterKnife.inject(this);

        _images = (ArrayList<String>) getIntent().getSerializableExtra(EXTRA_NAME);
        Assert.assertNotNull(_images);

        _adapter = new GalleryPagerAdapter(this);
        _pager.setAdapter(_adapter);
        _pager.setOffscreenPageLimit(6); // how many images to load into memory

        _closeButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Log.d(TAG, "Close clicked");
                finish();
            }
        });
    }

    class GalleryPagerAdapter extends PagerAdapter {

        Context _context;
        LayoutInflater _inflater;

        public GalleryPagerAdapter(Context context) {
            _context = context;
            _inflater = (LayoutInflater) _context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        }

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

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

        @Override
        public Object instantiateItem(ViewGroup container, final int position) {
            View itemView = _inflater.inflate(R.layout.pager_gallery_item, container, false);
            container.addView(itemView);

            // Get the border size to show around each image
            int borderSize = _thumbnails.getPaddingTop();

            // Get the size of the actual thumbnail image
            int thumbnailSize = ((FrameLayout.LayoutParams)
                    _pager.getLayoutParams()).bottomMargin - (borderSize*2);

            // Set the thumbnail layout parameters. Adjust as required
            LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(thumbnailSize, thumbnailSize);
            params.setMargins(0, 0, borderSize, 0);

            // You could also set like so to remove borders
            //ViewGroup.LayoutParams params = new ViewGroup.LayoutParams(
            //        ViewGroup.LayoutParams.WRAP_CONTENT,
            //        ViewGroup.LayoutParams.WRAP_CONTENT);

            final ImageView thumbView = new ImageView(_context);
            thumbView.setScaleType(ImageView.ScaleType.CENTER_CROP);
            thumbView.setLayoutParams(params);
            thumbView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Log.d(TAG, "Thumbnail clicked");

                    // Set the pager position when thumbnail clicked
                    _pager.setCurrentItem(position);
                }
            });
            _thumbnails.addView(thumbView);

            final SubsamplingScaleImageView imageView =
                    (SubsamplingScaleImageView) itemView.findViewById(R.id.image);

            // Asynchronously load the image and set the thumbnail and pager view
            Glide.with(_context)
                    .load(_images.get(position))
                    .asBitmap()
                    .into(new SimpleTarget<Bitmap>() {
                        @Override
                        public void onResourceReady(Bitmap bitmap, GlideAnimation anim) {
                            imageView.setImage(ImageSource.bitmap(bitmap));
                            thumbView.setImageBitmap(bitmap);
                        }
                    });

            return itemView;
        }

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

完整的 Android 项目已在 Github 上发布：https://github.com/sourcey/imagegallerydemo

如果您有所需的内容，请选择一个答案...

Answer 6

查看工作中的demo from here

随着 RecyclerView 库的发布，您可以轻松实现水平和垂直列表方向。这可以通过使用 LinearLayoutManager 来实现，您可以为其指定水平或垂直方向，如下所示...

 LinearLayoutManager horizontalLayoutManager = new LinearLayoutManager(MainActivity.this, LinearLayoutManager.HORIZONTAL, false);

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