Блог

Я планирую разработать приложение для Android, в котором клиент сможет изменять фон приложения и устанавливать свои личные изображения или фотографии в качестве фона. Но это означает, что изображений не будет в «drawables», я очень новичок в Android, я очень долго искал это, кто-нибудь, пожалуйста, может мне помочь.

Попробуйте это…

     public class GalleryAdapter extends Activity {
        private int count;
        private Bitmap[] thumbnails;
        private boolean[] thumbnailsselection;
        private String[] arrPath;
        private ImageAdapter imageAdapter;

        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.image_selector);
            final String[] columns = { MediaStore.Images.Media.DATA,MediaStore.Images.Media._ID };
            final String orderBy = MediaStore.Images.Media._ID;
            Cursor imagecursor = managedQuery(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, columns, null,null,orderBy);
            int image_column_index = imagecursor.getColumnIndex(MediaStore.Images.Media._ID);
            this.count = imagecursor.getCount();
            this.thumbnails = new Bitmap[this.count];
            this.arrPath = new String[this.count];
            this.thumbnailsselection = new boolean[this.count];

            for (int i = 0; i < this.count; i  ) {
                imagecursor.moveToPosition(i);
                int id = imagecursor.getInt(image_column_index);
                int dataColumnIndex = imagecursor.getColumnIndex(MediaStore.Images.Media.DATA);
                thumbnails[i] = MediaStore.Images.Thumbnails.getThumbnail(
                getApplicationContext().getContentResolver(), id,
                MediaStore.Images.Thumbnails.MICRO_KIND, null);
                arrPath[i] = imagecursor.getString(dataColumnIndex);
            }

            GridView imagegrid = (GridView) findViewById(R.id.PhoneImageGrid);
            imageAdapter = new ImageAdapter();
            imagegrid.setAdapter(imageAdapter);
            imagecursor.close();
            final Button selectBtn = (Button) findViewById(R.id.selectBtn);
            selectBtn.setOnClickListener(new OnClickListener() {
                public void onClick(View v) {
                    final int len = thumbnailsselection.length;
                    int cnt = 0;
                    String selectImages = "";
                    for (int i = 0; i < len; i  ){
                        if (thumbnailsselection[i]) {
                            cnt  ;
                            selectImages = selectImages   arrPath[i]   "|";
                        }
                    }

                    if (cnt == 0) {
                        Toast.makeText(getApplicationContext(), "Please select at least one image", Toast.LENGTH_LONG).show();
                    } else {
                        Toast.makeText(getApplicationContext(), "You've selected Total "   cnt   " image(s).",Toast.LENGTH_LONG).show();
                        Log.d("SelectedImages", selectImages);
                    }
                }
            });
        }

        public class ImageAdapter extends BaseAdapter {
            private LayoutInflater mInflater;
            public ImageAdapter() {
                mInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            }

            public int getCount() {
                return count;
            }
            public Object getItem(int position) {
                return position;
            }
            public long getItemId(int position) {
                return position;
            }
            public View getView(int position, View convertView, ViewGroup parent) {
                ViewHolder holder;
                if (convertView == null) {
                    holder = new ViewHolder();
                    convertView = mInflater.inflate(R.layout.gallery_item,null);
                    holder.imageview = (ImageView) convertView.findViewById(R.id.thumbImage);
                    holder.checkbox = (CheckBox) convertView.findViewById(R.id.itemCheckBox);
                    convertView.setTag(holder);

                } else {
                    holder = (ViewHolder) convertView.getTag();
                }
                holder.checkbox.setId(position);
                holder.imageview.setId(position);
                holder.checkbox.setOnClickListener(new OnClickListener() {
                    public void onClick(View v) {
                        CheckBox cb = (CheckBox) v;
                        int id = cb.getId();
                        if (thumbnailsselection[id]) {
                            cb.setChecked(false);
                            thumbnailsselection[id] = false;
                        } else {
                            cb.setChecked(true);
                            thumbnailsselection[id] = true;
                        }
                    }
                });
                holder.imageview.setOnClickListener(new OnClickListener() {
                    public void onClick(View v) {
                        int id = v.getId();
                        Intent intent = new Intent();
                        intent.setAction(Intent.ACTION_VIEW);
                        intent.setDataAndType(Uri.parse("file://"   arrPath[id]),"image/*");
                        startActivity(intent);
                    }
                });
                holder.imageview.setImageBitmap(thumbnails[position]);
                holder.checkbox.setChecked(thumbnailsselection[position]);
                holder.id = position;
                return convertView;
            }
        }
        class ViewHolder {
            ImageView imageview;
            CheckBox checkbox;
            int id;
        }

}
  

image_selector.xml

 <?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">
    <Button android:id="@ id/selectBtn" 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" 
        android:text="Select"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true" 
        android:minWidth="200px" />
    <GridView android:id="@ id/PhoneImageGrid"
        android:layout_width="fill_parent" 
        android:layout_height="fill_parent"
        android:numColumns="auto_fit" 
        android:verticalSpacing="10dp"
        android:horizontalSpacing="10dp" 
        android:columnWidth="90dp"
        android:stretchMode="columnWidth" 
        android:gravity="center"
        android:layout_above="@id/selectBtn" />
</RelativeLayout>
  

gallery_item.xml

 <?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">
    <ImageView android:id="@ id/thumbImage" 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" 
        android:layout_centerInParent="true" />
    <CheckBox android:id="@ id/itemCheckBox" 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" 
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true" />
</RelativeLayout>