Question

我已经编写了一个程序来从一个url获取json数据，其中有一个图像位于base64和其他textview数据中，我能够在我的textview中显示数据，我也能够将它转换为位图但是我不知道如何在我的代码中使用它，我使用imageloader库来显示我的图像。我需要一些帮助

 url = url.toString().concat(veh_code);
        httpCalls = new HTTPCalls();
        JSONObject jsonObj = httpCalls.jo(url, imeiNumber, verificationCode, 
        appname);
        try {
            driverDetails = httpCalls.getJSONfromURL(url, imeiNumber, 
            clientCode, verificationCode);
             for (int i = 0; i < driverDetails.length(); i++) {
                 JSONObject c = driverDetails.getJSONObject(i);
                 reg_no = c.getString(TAG_REGISTRATION_NO);
                 driver_name = c.getString(TAG_DRIVER_NAME);
                 driver_code = c.getString(TAG_DRIVER_CODE);
                 driver_photo = c.getString(TAG_DRIVER_PHOTO);
                 phone_no = c.getString(TAG_PHONE_NO);
                // try{
                // byte[] decodedString = Base64.decode(driver_photo, 
                // Base64.DEFAULT);
                // Bitmap decodedByte = 
                // BitmapFactory.decodeByteArray(decodedString, 0, 
                // decodedString.length);
                 HashMap<String, String> driver_details = new  
                 HashMap<String, String>();
                 driver_details.put(TAG_REGISTRATION_NO, reg_no);
                 driver_details.put(TAG_DRIVER_NAME, driver_name);
                 driver_details.put(TAG_DRIVER_CODE, driver_code);
                 driver_details.put(TAG_DRIVER_PHOTO, driver_photo);
                 driver_details.put(TAG_PHONE_NO, phone_no);
                 resultsList.add(driver_details);
                //}
                // catch(Exception e){
                //   e.printStackTrace();
                // }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

ListViewAdapter adapter = new ListViewAdapter(getApplicationContext(), 
resultsList);
lv.setAdapter(adapter);

上面的代码用于从url获取所有json数据，我已经注释掉了我将base64转换为位图的代码，但我不知道如何将它添加到我的arraylist中，它只接受字符串。< / p>

我的ListViewAdapter.java

public class ListViewAdapter extends BaseAdapter {

Context context;
LayoutInflater inflater;
ArrayList<HashMap<String, String>> data = new  
ArrayList<HashMap<String,String>>();
ImageLoader imageLoader;
HashMap<String, String> resultp = new HashMap<String, String>();
int position;
TextView driverName, driverCode,reg_no,phone_no;
ImageView driverPhoto;

public ListViewAdapter(Context context, ArrayList<HashMap<String, String>> 
    arraylist) {
    this.context = context;
    data = arraylist;
    imageLoader = new ImageLoader(context);
}

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

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

@Override
public long getItemId(int position) {
    return 0;
}

public View getView(final int position, View convertView, ViewGroup parent) 
    {
    inflater = (LayoutInflater) 
    context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View itemView = inflater.inflate(R.layout.driver_details_row, parent, 
    false);
    resultp = data.get(position);
    driverName = (TextView) itemView.findViewById(R.id.DriverName);
    driverCode = (TextView) itemView.findViewById(R.id.DriverCode);
    reg_no = (TextView) itemView.findViewById(R.id.regNo);
    phone_no = (TextView) itemView.findViewById(R.id.PhoneNo);
    driverPhoto = (ImageView) itemView.findViewById(R.id.driverImage);
    driverName.setText(resultp.get(DriverDetails.TAG_DRIVER_NAME));
    driverCode.setText(resultp.get(DriverDetails.TAG_DRIVER_CODE));
    reg_no.setText(resultp.get(DriverDetails.TAG_REGISTRATION_NO));
    phone_no.setText(resultp.get(DriverDetails.TAG_PHONE_NO));
    imageLoader.DisplayImage(resultp.get(DriverDetails.TAG_DRIVER_PHOTO), 
    driverPhoto);
    return itemView;
}

}

来自imageloader类的方法

public void DisplayImage(String url, ImageView imageView) {
    imageViews.put(imageView, url);
    Bitmap bitmap = memoryCache.get(url);
    if (bitmap != null)
        imageView.setImageBitmap(bitmap);
    else {
        queuePhoto(url, imageView);
        imageView.setImageResource(stub_id);
    }
}

我还尝试添加一个接受字符串和位图的arraylist，但我在上面的方法上遇到错误，因为该方法只接受字符串和imageview但不接受位图和imageview

需要一些帮助才能显示base64并将其转换为我的imageview。

如何将base64中的json字符串转换为android中的位图

0 个答案: