Android CV系列 > 图片选择 最多几张带加号~

 

1.下载个加号

---

2.

maven { url "https://jitpack.io" }

//支持多选的安卓相册
compile 'com.yanzhenjie:album:2.0.2'
//Glide
compile 'com.github.bumptech.glide:glide:3.7.0'
//RecyclerView 快速适配器
compile 'com.github.CymChad:BaseRecyclerViewAdapterHelper:2.9.30'
//design26.1.0
implementation 'com.android.support:design:26.1.0'

---

3.Adapter

public class MyAdapter extends BaseQuickAdapter<ImageInfo, BaseViewHolder> {

    public MyAdapter(int layoutResId, @Nullable List<ImageInfo> data) {
        super(layoutResId, data);
    }

    @Override
    protected void convert(BaseViewHolder helper, ImageInfo item) {
        Object imagePathOrResId = item.getImagePathOrResId();
        ImageView imageItem = helper.getView(R.id.imageItem);
        if (imagePathOrResId instanceof String) {
            File file = CompressHelper.getDefault(mContext).compressToFile(new File((String) imagePathOrResId));
            Glide.with(mContext)
                    .load(file)
                    .into(imageItem);
        } else {
            int imagePathOrResId1 = (int) imagePathOrResId;
            Glide.with(mContext)
                    .load(imagePathOrResId1)
                    .into(imageItem);
        }
    }

//    @Override
//    public int getItemCount() {
//        return 6;
//    }
}

---

4.Bean

public class ImageInfo {
    private Object imagePathOrResId;

    public Object getImagePathOrResId() {
        return imagePathOrResId;
    }

    public void setImagePathOrResId(Object imagePathOrResId) {
        this.imagePathOrResId = imagePathOrResId;
    }

    public ImageInfo(Object imagePathOrResId) {
        this.imagePathOrResId = imagePathOrResId;
    }

    @Override
    public String toString() {
        return "ImageInfo{" +
                "imagePathOrResId=" + imagePathOrResId +
                '}';
    }
}

---

5.MainAc

public class MainActivity extends AppCompatActivity {

    private int ACTIVITY_REQUEST_SELECT_PHOTO = 12138;//随意
    private RecyclerView recyclerView;
    private int size;
    private List<ImageInfo> list = new ArrayList<>();
    private MyAdapter myAdapter;
    private int count = 6;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();

        list.add(new ImageInfo(R.drawable.add));

        myAdapter = new MyAdapter(R.layout.item_image, list);
        GridLayoutManager gridLayoutManager = new GridLayoutManager(this, 3);
        recyclerView.setLayoutManager(gridLayoutManager);
        recyclerView.setAdapter(myAdapter);
        myAdapter.setOnItemClickListener(new BaseQuickAdapter.OnItemClickListener() {

            @Override
            public void onItemClick(BaseQuickAdapter adapter, View view, int position) {

                if (list.get(position).getImagePathOrResId() instanceof String || list.size() >= 7) {
                    return;
                }
                Album.image(MainActivity.this) // 选择图片。
                        .multipleChoice()
                        .requestCode(ACTIVITY_REQUEST_SELECT_PHOTO)
                        .camera(true)//有照相机
                        .columnCount(3)//一行三个
                        .selectCount(count)//选择一个
                        .onResult(new Action<ArrayList<AlbumFile>>() {
                            @Override
                            public void onAction(int requestCode, @NonNull ArrayList<AlbumFile> result) {

                                size = result.size();//选了几个
                                count = count - size;
                                if (size > 0) {
                                    for (int i = 0; i < size; i++) {
                                        list.add(new ImageInfo(result.get(i).getPath()));
                                    }
                                    for (int i = 0; i < list.size(); i++) {
                                        Object imagePathOrResId = list.get(i).getImagePathOrResId();
                                        if (imagePathOrResId instanceof Integer) {
                                            list.remove(i);
                                        }
                                    }
                                    if (list.size() < 6) {
                                        list.add(new ImageInfo(R.drawable.add));
                                    }
                                    myAdapter.notifyDataSetChanged();
                                }
                            }
                        })
                        .start();
            }
        });

        myAdapter.setOnItemLongClickListener(new BaseQuickAdapter.OnItemLongClickListener() {
            @Override
            public boolean onItemLongClick(BaseQuickAdapter adapter, View view, int position) {
                if(list.size()>0){

                    if(list.get(position).getImagePathOrResId() instanceof String){
                        myAdapter.remove(position);
                        count++;
                    }
                    if(list.size()==5 && list.get(4).getImagePathOrResId() instanceof String){
                        list.add(new ImageInfo(R.drawable.add));
                    }
                }
                return true;
            }
        });
    }

    private void initView() {
        recyclerView = (RecyclerView) findViewById(R.id.recyclerView);
    }
}

---

6.MainXml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
    tools:context="com.as.mydemo666.MainActivity">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recyclerView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>
</LinearLayout>

---

7.item_image

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="horizontal">

    <ImageView
        android:id="@+id/imageItem"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:padding="5dp"
        android:scaleType="fitXY" />
</LinearLayout>