Question

我的目标

所以我想在我的Android应用程序中解析图片库的图片。我们说我有 5（或更多）图片库，每个图片库中都有可变数量的图片

我的GalleryOverview给了我ListView，让我们说

缩略图
描述
日期

单击ListView中的一个项目，可以在PictureDetail Activity中为我提供整个图库。单击Pic本身，它会打开SinglePicture Activity以全分辨率为我提供Pic

当前状态

因此，活动树不是问题所在，我能够解析并加载1个图库，其中包含静态数量的图片。我失败的地方：JSON-Parsing（我自己选择哪个结构）并插入本地SQLTable

OVERVIEW.CLASS

public class Overview extends AppCompatActivity {

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

    RecyclerView.LayoutManager layoutManager = new GridLayoutManager(this, 2);
    RecyclerView recyclerView = (RecyclerView) findViewById(R.id.rv_images);
    recyclerView.setHasFixedSize(true);
    recyclerView.setLayoutManager(layoutManager);

    Overview.ImageGalleryAdapter adapter = new Overview.ImageGalleryAdapter(getApplicationContext(),SinglePicture.getSpacePhotos());
    recyclerView.setAdapter(adapter);

}

private class ImageGalleryAdapter extends RecyclerView.Adapter<ImageGalleryAdapter.MyViewHolder>  {

    @Override
    public ImageGalleryAdapter.MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

        Context context = parent.getContext();
        LayoutInflater inflater = LayoutInflater.from(context);

        // Inflate the layout
        View photoView = inflater.inflate(R.layout.gallery_costume_item_layout, parent, false);

        ImageGalleryAdapter.MyViewHolder viewHolder = new ImageGalleryAdapter.MyViewHolder(photoView);
        return viewHolder;
    }

    @Override
    public void onBindViewHolder(ImageGalleryAdapter.MyViewHolder holder, int position) {

        SinglePicture spacePhoto = mSpacePhotos[position];
        ImageView imageView = holder.mPhotoImageView;

        Glide.with(mContext)
                .load(spacePhoto.getUrl())
                .into(imageView);
    }

    @Override
    public int getItemCount() {
        return (mSpacePhotos.length);
    }

    public class MyViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {

        public ImageView mPhotoImageView;

        public MyViewHolder(View itemView) {

            super(itemView);
            mPhotoImageView = (ImageView) itemView.findViewById(R.id.iv_photo);
            itemView.setOnClickListener(this);
        }

        @Override
        public void onClick(View view) {

            int position = getAdapterPosition();
            if(position != RecyclerView.NO_POSITION) {
                SinglePicture spacePhoto = mSpacePhotos[position];

                Intent intent = new Intent(mContext, PictureDetail.class);
                intent.putExtra(PictureDetail.EXTRA_SPACE_PHOTO, spacePhoto);
                startActivity(intent);
            }
        }
    }

    private SinglePicture[] mSpacePhotos;
    private Context mContext;

    public ImageGalleryAdapter(Context context, SinglePicture[] spacePhotos) {
        mContext = context;
        mSpacePhotos = spacePhotos;
    }
}

}

图片细节

public class PictureDetail extends AppCompatActivity {

public static final String EXTRA_SPACE_PHOTO = "PictureDetail.SPACE_PHOTO";

private ImageView mImageView;

@SuppressLint("CheckResult")
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.gallery_detail);

    mImageView = (ImageView) findViewById(R.id.image);
    SinglePicture spacePhoto = getIntent().getParcelableExtra(EXTRA_SPACE_PHOTO);

    Glide.with(this)

            .asBitmap()

            .load(spacePhoto.getUrl())

            //.listener(new RequestListener<String, Bitmap>()
            .listener(new RequestListener<Bitmap>() {
                @Override
                public boolean onLoadFailed(@Nullable GlideException e, Object model, Target<Bitmap> target, boolean isFirstResource) {
                    return false;
                }

                @Override
                public boolean onResourceReady(Bitmap resource, Object model, Target<Bitmap> target, DataSource dataSource, boolean isFirstResource) {
                    return false;
                }



                public void onPalette(Palette palette) {
                    if (null != palette) {
                        ViewGroup parent = (ViewGroup) mImageView.getParent().getParent();
                        parent.setBackgroundColor(palette.getDarkVibrantColor(Color.GRAY));
                    }
                }
            })

            .into(mImageView);

}

}

参与JSON

public class JSON_GallReader extends AppCompatActivity {


SQLiteDatabase sqLiteDatabase;
String HttpJSonURL = config.JSON_GL;
ProgressDialog progressDialog;

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

    SQLiteDataBaseBuild();
    SQLiteTableBuild();
    DeletePreviousData();

    new StoreJSonDataInToSQLiteClass(JSON_GallReader.this).execute();

}

private class StoreJSonDataInToSQLiteClass extends AsyncTask<Void, Void, Void> {

    public Context context;

    String FinalJSonResult;


    public StoreJSonDataInToSQLiteClass(Context context) {

        this.context = context;
    }

    @Override
    protected void onPreExecute() {

        super.onPreExecute();

        progressDialog = new ProgressDialog(JSON_GallReader.this);
        progressDialog.setTitle("LOADING");
        progressDialog.setMessage("Please Wait");
        progressDialog.show();

    }

    @Override
    protected Void doInBackground(Void... arg0) {

        HttpServiceClass httpServiceClass = new HttpServiceClass(HttpJSonURL);

        try {
            httpServiceClass.ExecutePostRequest();


            if (httpServiceClass.getResponseCode() == 200) {

                FinalJSonResult = httpServiceClass.getResponse();

                if (FinalJSonResult != null) {

                    JSONArray jsonArray = null;
                    try {

                        JSONObject jsonObj = new JSONObject(FinalJSonResult);

                        // Getting JSON Array node
                        JSONArray gallery = jsonObj.getJSONArray("gallery");


                        // looping through the Gallery
                        for (int i = 0; i < gallery.length(); i++) {
                            JSONObject c = gallery.getJSONObject(i);
                            final int id = i;
                            String jr_id = c.getString("id");
                            String jr_descr = c.getString("cover");
                            String jr_name = c.getString("title");
                            String jr_date = c.getString("descr");

**这是问题**

                            String SQLiteDataBaseQuery = "INSERT INTO overall_table (id,des,name,date,imgurl,fburl,fbid) VALUES('"+id+"', '"+jr_descr+"',** HERE IS THE PROBLEM** );";

                            sqLiteDatabase.execSQL(SQLiteDataBaseQuery);



                        }


                    } catch (JSONException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                }
            } else {

                Toast.makeText(context, httpServiceClass.getErrorMessage(), Toast.LENGTH_SHORT).show();
            }
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }



        return null;
    }

    @Override
    protected void onPostExecute(Void result)

    {
        sqLiteDatabase.close();

        progressDialog.dismiss();

        Toast.makeText(JSON_Reader.this,"Load Done", Toast.LENGTH_LONG).show();

    }
}


public void SQLiteDataBaseBuild(){

    sqLiteDatabase = openOrCreateDatabase(SQLiteHelper.DATABASE_NAME, Context.MODE_PRIVATE, null);

}


public void SQLiteTableBuild(){

        sqLiteDatabase.execSQL("CREATE TABLE IF NOT EXISTS "+SQLiteHelper.TAB_NAME+"("+SQLiteHelper.table_id+" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "
            + SQLiteHelper.table_desc+" VARCHAR, " and so on..


}


public void DeletePreviousData(){

    sqLiteDatabase.execSQL("DELETE FROM "+ TAB_NAME+"");

}

}

当前的JSON（也可以自由编辑这个）

{
  "gallery": [
    {
      "cover": "https://storage.googleapis.com/creator-academy-assets/thumbnails/thumbnails-z1-1.png",
      "title": "Test Gallery 1",
      "desc": "Here you go number one",
      "pics": [
        "https://storage.googleapis.com/creator-academy-assets/thumbnails/thumbnails-z1-1.png",
        "https://storage.googleapis.com/creator-academy-assets/thumbnails/thumbnails-z1-1.png",
        "https://storage.googleapis.com/creator-academy-assets/thumbnails/thumbnails-z1-1.png",
        "https://storage.googleapis.com/creator-academy-assets/thumbnails/thumbnails-z1-1.png",
        "https://storage.googleapis.com/creator-academy-assets/thumbnails/thumbnails-z1-1.png",
        "https://storage.googleapis.com/creator-academy-assets/thumbnails/thumbnails-z1-1.png",
        "https://storage.googleapis.com/creator-academy-assets/thumbnails/thumbnails-z1-1.png",
        "https://storage.googleapis.com/creator-academy-assets/thumbnails/thumbnails-z1-1.png"
      ]
    },
    {
      "cover": "https://storage.googleapis.com/creator-academy-assets/thumbnails/thumbnails-z1-1.png",
      "title": "Here you go number 2",
      "desc": "Hier steht die Beschreibung zur Gallery",
      "pics": [
        "https://storage.googleapis.com/creator-academy-assets/thumbnails/thumbnails-z1-1.png",
        "https://storage.googleapis.com/creator-academy-assets/thumbnails/thumbnails-z1-1.png",
        "https://storage.googleapis.com/creator-academy-assets/thumbnails/thumbnails-z1-1.png",
        "https://storage.googleapis.com/creator-academy-assets/thumbnails/thumbnails-z1-1.png",
        "https://storage.googleapis.com/creator-academy-assets/thumbnails/thumbnails-z1-1.png",
        "https://storage.googleapis.com/creator-academy-assets/thumbnails/thumbnails-z1-1.png",
        "https://storage.googleapis.com/creator-academy-assets/thumbnails/thumbnails-z1-1.png"
      ]
    },
    {
      "cover": "https://storage.googleapis.com/creator-academy-assets/thumbnails/thumbnails-z1-1.png",
      "title": "Here you go number three",
      "desc": "Hier steht die Beschreibung zur Gallery",
      "pics": [
        "https://storage.googleapis.com/creator-academy-assets/thumbnails/thumbnails-z1-1.png",
        "https://storage.googleapis.com/creator-academy-assets/thumbnails/thumbnails-z1-1.png",
        "https://storage.googleapis.com/creator-academy-assets/thumbnails/thumbnails-z1-1.png",
        "https://storage.googleapis.com/creator-academy-assets/thumbnails/thumbnails-z1-1.png",
        "https://storage.googleapis.com/creator-academy-assets/thumbnails/thumbnails-z1-1.png",
        "https://storage.googleapis.com/creator-academy-assets/thumbnails/thumbnails-z1-1.png",
        "https://storage.googleapis.com/creator-academy-assets/thumbnails/thumbnails-z1-1.png",
        "https://storage.googleapis.com/creator-academy-assets/thumbnails/thumbnails-z1-1.png",
        "https://storage.googleapis.com/creator-academy-assets/thumbnails/thumbnails-z1-1.png",
        "https://storage.googleapis.com/creator-academy-assets/thumbnails/thumbnails-z1-1.png",
        "https://storage.googleapis.com/creator-academy-assets/thumbnails/thumbnails-z1-1.png",
        "https://storage.googleapis.com/creator-academy-assets/thumbnails/thumbnails-z1-1.png",
        "https://storage.googleapis.com/creator-academy-assets/thumbnails/thumbnails-z1-1.png",
        "https://storage.googleapis.com/creator-academy-assets/thumbnails/thumbnails-z1-1.png",
        "https://storage.googleapis.com/creator-academy-assets/thumbnails/thumbnails-z1-1.png",
        "https://storage.googleapis.com/creator-academy-assets/thumbnails/thumbnails-z1-1.png",
        "https://storage.googleapis.com/creator-academy-assets/thumbnails/thumbnails-z1-1.png"
      ]
    }
  ]
}

问题

正如你所看到的，在我的JSON_GallReader中，当我循环浏览我的JSON长度时，我并没有真正得到如何通过一个数组（图库）进行循环，该数组成为了＃34; pics＆＃34;阵列 - 基本上我能够 JSONArray pics = jsonObj.getJSONArray（＆＃34; pics＆＃34;）; 和 for（int j = 0; j＆lt; pics.length（）; j ++）{ ...

BUT

有没有办法将我的所有链接放在1个表中，还是我必须为所有链接创建一个单独的表？

我的第二个想法如下：也许我应该得到两个JSON，一个用于解析图像库，另一个只包含IMG链接，当点击ListView项目时，它将动态解析。会更好吗？我使用GLIDE btw。

Answer 1

您可以通过以下代码将所有pics数组存储到单个列表中

List<String> pics_list =new ArrayList();
JsonObject response=new JsonObject(s);
JsonArray gallery =response.getJsonArray("gallery");
if(gallery!=null && gallery.length()>0){
for(int i=0;i<gallery.length();i++){
JsonObject json=gallery.getJsonObject(i);
JsonArray pics =json.getJsonArray("pics");
String [] arr=new String[pics.length];
for(int j=0; j<pics.length();j++){

arr[j]=pics.optstring(i);

}
for(int k=0 ;k<arr.length();k++){
pics_list.add(arr[k]);
}


}

}

之后，您可以使用sqlite中的update或create命令将此列表保存到数据库中

Android图片库JSON / SQLite w /可变图像数量

1 个答案: