将所有图像从gallery加载到android中的Application

Question

我正在创建一个应用程序,其中我需要将库中的所有图像放入我的应用程序中,其中包含girdview.我希望所有文件夹中的所有图像都出现在gridview中.

String[] proj = { MediaStore.Images.Media.DATA, MediaStore.Images.Media._ID };
actualimagecursor = managedQuery(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, proj,
                      null, null, MediaStore.Images.Media.DEFAULT_SORT_ORDER);

actual_image_column_index = actualimagecursor.getColumnIndexOrThrow(MediaStore.Images.Media._ID);
actualimagecursor.moveToPosition(position);
String i = actualimagecursor.getString(actual_image_column_index);

我已将此代码添加到我的代码中,但我只获得了SD卡图像,没有获得其他文件夹图像.如何从画廊中获取所有图像？

提前致谢.

Answer 1

在Glide的帮助下工作解决方案.奖金部分是Glide将自动播放Gif.

import java.util.ArrayList;

import android.app.Activity;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.provider.MediaStore.MediaColumns;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.Toast;

import com.bumptech.glide.Glide;

/**
 * The Class GallarySample.
 */
public class GallarySample extends Activity {

    /** The images. */
    private ArrayList<String> images;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.gallery_activity);

        GridView gallery = (GridView) findViewById(R.id.galleryGridView);

        gallery.setAdapter(new ImageAdapter(this));

        gallery.setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> arg0, View arg1,
                    int position, long arg3) {
                if (null != images && !images.isEmpty())
                    Toast.makeText(
                            getApplicationContext(),
                            "position " + position + " " + images.get(position),
                            300).show();
                ;

            }
        });

    }

    /**
     * The Class ImageAdapter.
     */
    private class ImageAdapter extends BaseAdapter {

        /** The context. */
        private Activity context;

        /**
         * Instantiates a new image adapter.
         *
         * @param localContext
         *            the local context
         */
        public ImageAdapter(Activity localContext) {
            context = localContext;
            images = getAllShownImagesPath(context);
        }

        public int getCount() {
            return images.size();
        }

        public Object getItem(int position) {
            return position;
        }

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

        public View getView(final int position, View convertView,
                ViewGroup parent) {
            ImageView picturesView;
            if (convertView == null) {
                picturesView = new ImageView(context);
                picturesView.setScaleType(ImageView.ScaleType.FIT_CENTER);
                picturesView
                        .setLayoutParams(new GridView.LayoutParams(270, 270));

            } else {
                picturesView = (ImageView) convertView;
            }

            Glide.with(context).load(images.get(position))
                    .placeholder(R.drawable.ic_launcher).centerCrop()
                    .into(picturesView);

            return picturesView;
        }

        /**
         * Getting All Images Path.
         *
         * @param activity
         *            the activity
         * @return ArrayList with images Path
         */
        private ArrayList<String> getAllShownImagesPath(Activity activity) {
            Uri uri;
            Cursor cursor;
            int column_index_data, column_index_folder_name;
            ArrayList<String> listOfAllImages = new ArrayList<String>();
            String absolutePathOfImage = null;
            uri = android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI;

            String[] projection = { MediaColumns.DATA,
                    MediaStore.Images.Media.BUCKET_DISPLAY_NAME };

            cursor = activity.getContentResolver().query(uri, projection, null,
                    null, null);

            column_index_data = cursor.getColumnIndexOrThrow(MediaColumns.DATA);
            column_index_folder_name = cursor
                    .getColumnIndexOrThrow(MediaStore.Images.Media.BUCKET_DISPLAY_NAME);
            while (cursor.moveToNext()) {
                absolutePathOfImage = cursor.getString(column_index_data);

                listOfAllImages.add(absolutePathOfImage);
            }
            return listOfAllImages;
        }
    }
}

gridView的布局文件

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <GridView
        android:id="@+id/galleryGridView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:columnWidth="280dp"
        android:gravity="center"
        android:horizontalSpacing="2dp"
        android:numColumns="2"
        android:padding="2dp"
        android:stretchMode="columnWidth"
        android:verticalSpacing="2dp" >
    </GridView>

</RelativeLayout>

Answer 2

您使用MediaStore.Images.Media.EXTERNAL_CONTENT_URI的只是外部存储.对于内部存在MediaStore.Images.Media.INTERNAL_CONTENT_URI.您可以使用MergeCursor组合两个查询结果.