更新：感谢 Hariharan 先生，现在我可以将两个 JSON 数组合并到一个 ListView 中（我已经更新了我的代码）
现在我需要将未收集的邮票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邮票图像更改为黑白颜色
我应该怎么做才能仅对 UncollectedStamps 实施 B/W：
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"
}
]
}
我想在同一个列表中结合 JSONArrays 'collectedStamp' 和 'unCollectedStamp'
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);
当我尝试调用'arraylistCollected'分配给'collectedStamp'JSONArray 时，我收到此错误
No value for collectedStamp
当我从“unCollectedStamp”JSONArray 成功获取数据时
但是，如果我在收到错误消息'collectedStamp'之前移动了 for 循环代码unCollectedStamp
No value for unCollectedStamp