Question

我正在使用复选框将图库中的图像显示到我的自定义网格视图中。我只能选择6张图片。

我有以下代码

public class MultiPhotoSelectActivity extends BaseActivity {

    private ArrayList<String> imageUrls;
    private DisplayImageOptions options;
    private ImageAdapter imageAdapter;
    CheckBox mCheckBox;
    int pos;
    ArrayList<String> selectedItems;
    ArrayList<String> selectedimgs = new ArrayList<String>();
    RelativeLayout rl_gallery_row,rl_gallery_async;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.ac_image_grid);

        //Bundle bundle = getIntent().getExtras();
        //imageUrls = bundle.getStringArray(Extra.IMAGES);
        rl_gallery_async = (RelativeLayout) findViewById(R.id.RelativeLayout_galleryas);
        final String[] columns = { MediaStore.Images.Media.DATA, MediaStore.Images.Media._ID };
        final String orderBy = MediaStore.Images.Media.DATE_TAKEN;
        Cursor imagecursor = managedQuery(
                MediaStore.Images.Media.EXTERNAL_CONTENT_URI, columns, null,
                null, orderBy + " DESC");

        this.imageUrls = new ArrayList<String>();

        for (int i = 0; i < imagecursor.getCount(); i++) {
            imagecursor.moveToPosition(i);
            int dataColumnIndex = imagecursor.getColumnIndex(MediaStore.Images.Media.DATA);
            imageUrls.add(imagecursor.getString(dataColumnIndex));

            System.out.println("=====> Array path => "+imageUrls.get(i));
        }


        options = new DisplayImageOptions.Builder()
            .showStubImage(R.drawable.stub_image)
            .showImageForEmptyUri(R.drawable.image_for_empty_url)
            .cacheInMemory()
            .cacheOnDisc()
            .build();

        imageAdapter = new ImageAdapter(this, imageUrls);

        GridView gridView = (GridView) findViewById(R.id.gridview);
        gridView.setAdapter(imageAdapter);
        /*gridView.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                startImageGalleryActivity(position);
            }
        });*/
    }

    @Override
    protected void onStop() {
        imageLoader.stop();
        super.onStop();
    }

    public void btnChoosePhotosClick(View v){

        selectedItems = imageAdapter.getCheckedItems();
        Toast.makeText(MultiPhotoSelectActivity.this, "Total photos selected: "+selectedItems.size(), Toast.LENGTH_SHORT).show();
        Log.d(MultiPhotoSelectActivity.class.getSimpleName(), "Selected Items: " + selectedItems.toString());
    }


    public class ImageAdapter extends BaseAdapter {

        ArrayList<String> mList;
        LayoutInflater mInflater;
        Context mContext;
        SparseBooleanArray mSparseBooleanArray;

        public ImageAdapter(Context context, ArrayList<String> imageList) {
            // TODO Auto-generated constructor stub
            mContext = context;
            mInflater = LayoutInflater.from(mContext);
            mSparseBooleanArray = new SparseBooleanArray();
            mList = new ArrayList<String>();
            this.mList = imageList;

        }

        public ArrayList<String> getCheckedItems() {
            ArrayList<String> mTempArry = new ArrayList<String>();

            for(int i=0;i<mList.size();i++) {
                if(mSparseBooleanArray.get(i)) {
                    mTempArry.add(mList.get(i));
                }
            }

            return mTempArry;
        }

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

        @Override
        public Object getItem(int position) {
            return null;
        }

        @Override
        public long getItemId(int position) {
            return position;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            pos = position;
            if(convertView == null) {
                convertView = mInflater.inflate(R.layout.row_multiphoto_item, null);
            }

            mCheckBox = (CheckBox) convertView.findViewById(R.id.checkBox1);
            final ImageView imageView = (ImageView) convertView.findViewById(R.id.imageView1);
            rl_gallery_row = (RelativeLayout) findViewById(R.id.Relativelayout_gallery_row);

            imageLoader.displayImage("file://"+imageUrls.get(position), imageView, options, new SimpleImageLoadingListener() {
                @Override
                public void onLoadingComplete(Bitmap loadedImage) {
                    Animation anim = AnimationUtils.loadAnimation(MultiPhotoSelectActivity.this, R.anim.fade_in);
                    imageView.setAnimation(anim);
                    anim.start();
                }
            });

            mCheckBox.setTag(position);
            //mCheckBox.setId(position);
            mCheckBox.setChecked(mSparseBooleanArray.get(position));
            mCheckBox.setOnCheckedChangeListener(mCheckedChangeListener);

            //mCheckBox.setId(position);
            //holder.imageview.setId(position);
            return convertView;
        }

        OnCheckedChangeListener mCheckedChangeListener = new OnCheckedChangeListener()
        {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)
            {
                mSparseBooleanArray.put((Integer) buttonView.getTag(), isChecked);
                selectedItems = imageAdapter.getCheckedItems();
                if(selectedItems.size() > 5 )
                {
                    mCheckBox.setEnabled(false); // disable checkbox 
                }
            }
        };
    }
}

现在，当超过限制时，我无法自动取消选中该复选框。请帮忙..

Answer 1

我认为你的条件不满意取消勾选复选框，尝试在你的病情中吐司

Android设置条件在onCheckedChanged

1 个答案: