Question

我想将pictureActivity.java数组传递给另一个类imageAdapter.java。我确实在toast上获得了imgPath结果，但我不知道如何将字符串移动到另一个类。

PictureActivity.java

ArrayList<HashMap<String, String>> imgList = new ArrayList<HashMap<String, String>>();

    try {
        imageLink = json.getJSONArray(TAG_IMG);

        for(int i = 0; i < imageLink.length(); i++){
            JSONObject c = imageLink.getJSONObject(i);
            String imgPath = c.getString(TAG_PATH);

            HashMap<String, String> map = new HashMap<String, String>();
            map.put(TAG_PATH, imgPath);

            imgList.add(map);
            Toast.makeText(this, map.get(TAG_PATH), Toast.LENGTH_LONG).show();
        }
    }catch (JSONException e) {
        e.printStackTrace();
    }
    ((Gallery) findViewById(R.id.gallery))
            .setAdapter(new ImageAdapter(this));

ImageAdapter.java

public class ImageAdapter extends BaseAdapter {

    private Context myContext;
    public String[] myRemoteImages = {
            //How to add imagepath here??
    };

我想将数组字符串放在myRemoteImages上。

Answer 1

您可以在初始化适配器类对象时传递数组适配器：

((Gallery) findViewById(R.id.gallery))
            .setAdapter(new ImageAdapter(this, imgList));

并在你的适配器类中创建一个这样的构造函数：

public class ImageAdapter extends BaseAdapter {
  ArrayList<HashMap<String, String>> data = null;
  public String[] myRemoteImages;
  private Context myContext;

  public ImageAdapter(Context context, ArrayList<HashMap<String, String>> data){
   this.mContext = context;
   this.data = data;

   myRemoteImages = new String[this.data.size()];
   for(int i=0; i<this.data.size(); i++){
     HashMap<String, String> map = this.data.get(i);
     myRemoteImages[i] = map.get(TAG_PATH).toString();
   }

  }
}

在适配器类中获取ArrayList后，您可以从中获取所需的任何值。

如何将Arraylist字符串传递给另一个类的适配器？

1 个答案: