更新：感谢Hariharan先生，我现在可以将两个JSON数组合并到一个ListView中（我已将其更新为我的代码）
现在我需要将未收集的标记更改为黑白颜色我有这个代码可以改变黑白颜色但是如果我实现它会将所有标记图像更改为黑/白色
我该怎么办才能将B / W仅用于UncollectedStamps：
这是改变图像颜色的功能：
public Bitmap toGrayscale(Bitmap bmpOriginal)
{
int width, height;
height = bmpOriginal.getHeight();
width = bmpOriginal.getWidth();
Bitmap bmpGrayscale = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);
Canvas c = new Canvas(bmpGrayscale);
Paint paint = new Paint();
ColorMatrix cm = new ColorMatrix();
cm.setSaturation(0);
ColorMatrixColorFilter f = new ColorMatrixColorFilter(cm);
paint.setColorFilter(f);
c.drawBitmap(bmpOriginal, 0, 0, paint);
return bmpGrayscale;
}
，这是ListViewAdapter
public class ListViewAdapter extends BaseAdapter {
// Declare Variables
Context context;
LayoutInflater inflater;
ArrayList<HashMap<String, String>> data;
ImageLoader imageLoader;
HashMap<String, String> resultp = new HashMap<String, String>();
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) {
// Declare Variables
TextView tvStampName;
ImageView stampImage;
inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View itemView = inflater.inflate(R.layout.single_stamp_layout, parent, false);
// Get the position
resultp = data.get(position);
tvStampName = (TextView) itemView.findViewById(R.id.tvStampName);
stampImage = (ImageView) itemView.findViewById(R.id.stampImage);
tvStampName.setText(resultp.get(StampsActivity.TAG_STAMP_NAME));
// Passes stampImage images URL into ImageLoader.class
imageLoader.DisplayImage(TAG_STAMP_IMAGE_URL+resultp.get(StampsActivity.TAG_STAMP_IMAGE), stampImage);
Animation myFadeInAnimation = AnimationUtils.loadAnimation(context, R.anim.fadein);
stampImage.startAnimation(myFadeInAnimation);
return itemView;
}
}
这个JSON结果
{
"status": "1",
"tappedStamp": "15",
"message": "stamp message",
"stampimage": "stamp3.png",
"stampname": "stamp3",
"collectedStamp": [
{
"id": "14",
"stampname": "stamp2 ",
"message": "stamp2 message",
"stampimage": "stamp2.png"
},
{
"id": "15",
"stampname": "stamp3",
"message": "stamp message",
"stampimage": "stamp3.png"
}
],
"unCollectedStamp": [
{
"id": "12",
"stampname": "Testing MKH Stamp",
"message": "Testing MKH Stamp",
"stampimage": "award.png"
},
{
"id": "13",
"stampname": "stamp1",
"message": "stamp1 Message",
"stampimage": "stamp1.png"
},
{
"id": "16",
"stampname": "Testing MKH Stamp",
"message": "Testing MKH Stamp",
"stampimage": "award.png"
}
]
}
我想将JSONArrays的gatherStamp'和'unCollectedStamp'组合在同一个List
这是更新的代码 感谢Hariharan先生
@Override
protected Void doInBackground(Void... params) {
// Create an array
arraylistCollected = new ArrayList<HashMap<String, String>>();
arraylistUncollected = new ArrayList<HashMap<String, String>>();
this.sharedPref = getSharedPreferences(getString(R.string.key_storage),0);
this.eventID = sharedPref.getString("eventid", null);
this.kioskid = Settings.Secure.getString(getContentResolver(), Settings.Secure.ANDROID_ID);
this.tagid = sharedPref.getString("tagID", null);
this.accesstoken = sharedPref.getString("accesstoken", null);
try {
// building parameters for Logout
List<NameValuePair> param = new ArrayList<NameValuePair>();
param.add(new BasicNameValuePair(TAG_ACCESSTOKEN, accesstoken));
param.add(new BasicNameValuePair(TAG_KIOSK_ID, kioskid));
Log.d("request!", "Starting");
// Retrieve JSON Objects from the given URL address
jsonobject = JSONParser.makeHttpRequest(STAMPS_LIST_URL,"POST",param);
Log.d("Loding Stamps Attemp", jsonobject.toString());
// get tapped Stamp Image Url
tappedStampImageUrl = jsonobject.getString(TAG_STAMP_IMAGE);
// Locate UNCOLLECTED STAMPS array name in JSON
jsonArrayUncollected = jsonobject.getJSONArray(TAG_UNCOLLECTED_STAMPS);
for (int i = 0; i < jsonArrayUncollected.length(); i++) {
HashMap<String, String> map = new HashMap<String, String>();
JSONObject jsonobject = jsonArrayUncollected.getJSONObject(i);
// Retrive JSON Objects
map.put(TAG_STAMPS_ID, jsonobject.getString(TAG_STAMPS_ID));
map.put(TAG_STAMP_IMAGE, jsonobject.getString(TAG_STAMP_IMAGE));
map.put(TAG_STAMP_NAME, jsonobject.getString(TAG_STAMP_NAME));
map.put(TAG_MESSAGE, jsonobject.getString(TAG_MESSAGE));
// Set the JSON Objects into the array
arraylistUncollected.add(map);
}
// Locate COLLECTED STAMPS array name in JSON
jsonArrayCollected = jsonobject.getJSONArray(TAG_COLLECTED_STAMPS);
for (int i = 0; i < jsonArrayCollected.length(); i++) {
HashMap<String, String> map = new HashMap<String, String>();
JSONObject jsonobject = jsonArrayCollected.getJSONObject(i);
// Retrive JSON Objects
map.put(TAG_STAMPS_ID, jsonobject.getString(TAG_STAMPS_ID));
map.put(TAG_STAMP_IMAGE, jsonobject.getString(TAG_STAMP_IMAGE));
map.put(TAG_STAMP_NAME, jsonobject.getString(TAG_STAMP_NAME));
map.put(TAG_MESSAGE, jsonobject.getString(TAG_MESSAGE));
// Set the JSON Objects into the array
arraylistCollected.add(map);
}
} catch (JSONException e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void args) {
imageLoader.DisplayImage(TAG_IMAGE_URL+tappedStampImageUrl, tappedStampImage);
Animation myFadeInAnimation = AnimationUtils.loadAnimation(StampsActivity.this, R.anim.fadein);
tappedStampImage.startAnimation(myFadeInAnimation);
// Locate the listview in listview_main.xml
//listview = (ListView) findViewById(R.id.listview);
gridView = (GridView) findViewById(R.id.gridView1);
// Pass the results into ListViewAdapter.java
adapter = new ListViewAdapter(StampsActivity.this, arraylistUncollected);
// Set the adapter to the ListView
//listview.setAdapter(adapter);
gridView.setAdapter(adapter);
// Close the progressdialog
mProgressDialog.dismiss();
}
}
在这部分
adapter = new ListViewAdapter(StampsActivity.this, arraylistCollected);
当我尝试拨打分配给'arraylistCollected' JSONArray的'collectedStamp'时，我收到此错误
No value for collectedStamp
当我从'unCollectedStamp'JSONArray成功获取数据时
但如果我在'collectedStamp'之前移动unCollectedStamp的for循环代码，我会收到错误消息
No value for unCollectedStamp
答案 0 :(得分：1)
试试这个..
你对两个for循环使用相同的jsonobject。你应该单独给。
for (int i = 0; i < jsonArrayUncollected.length(); i++) {
HashMap<String, String> map = new HashMap<String, String>();
JSONObject jsject = jsonArrayUncollected.getJSONObject(i);
// Retrive JSON Objects
map.put(TAG_STAMPS_ID, jsject .getString(TAG_STAMPS_ID));
map.put(TAG_STAMP_IMAGE, jsject .getString(TAG_STAMP_IMAGE));
map.put(TAG_STAMP_NAME, jsject .getString(TAG_STAMP_NAME));
map.put(TAG_MESSAGE, jsject .getString(TAG_MESSAGE));
// Set the JSON Objects into the array
arraylistUncollected.add(map);
}
// Locate COLLECTED STAMPS array name in JSON
jsonArrayCollected = jsonobject.getJSONArray(TAG_COLLECTED_STAMPS);
for (int i = 0; i < jsonArrayCollected.length(); i++) {
HashMap<String, String> map = new HashMap<String, String>();
JSONObject jsject= jsonArrayCollected.getJSONObject(i);
// Retrive JSON Objects
map.put(TAG_STAMPS_ID, jsject.getString(TAG_STAMPS_ID));
map.put(TAG_STAMP_IMAGE, jsject.getString(TAG_STAMP_IMAGE));
map.put(TAG_STAMP_NAME, jsject.getString(TAG_STAMP_NAME));
map.put(TAG_MESSAGE, jsject.getString(TAG_MESSAGE));
// Set the JSON Objects into the array
arraylistCollected.add(map);
}
修改
HashMap<String,ArrayList<HashMap<String, String>>> result = new HashMap<String,ArrayList<HashMap<String, String>>>();
result.put("Uncollected",arraylistUncollected);
result.put("Collected",arraylistCollected);