我有一个从json API获取的购买列表，如下所示：
public class MainActivity extends AppCompatActivity {
private WebView mWebviewPop;
private WebView view;
private FrameLayout mContainer;
private Context mContext;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
CookieManager cookieManager = CookieManager.getInstance();
cookieManager.setAcceptCookie(true);
view = (WebView) this.findViewById(R.id.webView);
mContainer = (FrameLayout) findViewById(R.id.webview_frame);
view.getSettings().setJavaScriptEnabled(true);
view.getSettings().setUserAgentString("Mozilla/5.0 (Linux; Android 4.4.2; ZTE T221 Build/KOT49H) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.85 Mobile Safari/537.36");
view.getSettings().setAppCacheEnabled(true);
view.getSettings().setLoadWithOverviewMode(true);
view.getSettings().setUseWideViewPort(true);
view.getSettings().setDatabaseEnabled(true);
view.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
view.getSettings().setSupportMultipleWindows(true);
view.getSettings().setAllowFileAccess(true);
view.getSettings().setDomStorageEnabled(true);
view.invalidate();
view.setWebViewClient(new MyBrowser() {
});
view.getSettings().setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);
view.loadUrl("http://mysite");
view.setWebChromeClient(new UriChromeClient() {
});
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
if (!prefs.getBoolean("firstTime", false)) {
Intent alarmIntent = new Intent(this, AlarmReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, alarmIntent, 0);
AlarmManager manager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.set(Calendar.HOUR_OF_DAY, 18);
calendar.set(Calendar.MINUTE, 30);
calendar.set(Calendar.SECOND, 1);
manager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
AlarmManager.INTERVAL_DAY, pendingIntent);
SharedPreferences.Editor editor = prefs.edit();
editor.putBoolean("firstTime", true);
editor.apply();
}
mContext=this.getApplicationContext();
}
private class MyBrowser extends WebViewClient {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (url.startsWith("tel:") || url.startsWith("sms:") || url.startsWith("smsto:") || url.startsWith("mailto:") || url.startsWith("mms:") || url.startsWith("mmsto:") || url.startsWith("market:") || url.startsWith("https://youtu")) {
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
startActivity(intent);
return true;
} else {
view.loadUrl(url);
return true;
}
}
@Override
public void onReceivedSslError(WebView view, SslErrorHandler handler,
SslError error) {
Log.d("onReceivedSslError", "onReceivedSslError");
//super.onReceivedSslError(view, handler, error);
}
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event)
{
if ((keyCode == KeyEvent.KEYCODE_BACK) && view.canGoBack()) {
view.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
}
class UriChromeClient extends WebChromeClient {
@Override
public boolean onCreateWindow(WebView view, boolean isDialog,
boolean isUserGesture, Message resultMsg) {
CookieManager cookieManager = CookieManager.getInstance();
cookieManager.setAcceptCookie(true);
mWebviewPop = new WebView(mContext);
mWebviewPop.setVerticalScrollBarEnabled(false);
mWebviewPop.getSettings().setLoadWithOverviewMode(true);
mWebviewPop.getSettings().setUseWideViewPort(true);
mWebviewPop.setHorizontalScrollBarEnabled(false);
mWebviewPop.setWebViewClient(new MyBrowser());
mWebviewPop.getSettings().setDatabaseEnabled(true);
mWebviewPop.getSettings().setJavaScriptEnabled(true);
mWebviewPop.getSettings().setSavePassword(true);
mWebviewPop.getSettings().setAppCacheEnabled(true);
mWebviewPop.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
mWebviewPop.getSettings().setSupportMultipleWindows(true);
mWebviewPop.getSettings().setAllowFileAccess(true);
mWebviewPop.getSettings().setDomStorageEnabled(true);
mWebviewPop.setLayoutParams(new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.MATCH_PARENT));
mContainer.addView(mWebviewPop);
WebView.WebViewTransport transport = (WebView.WebViewTransport) resultMsg.obj;
transport.setWebView(mWebviewPop);
resultMsg.sendToTarget();
return true;
}
@Override
public void onCloseWindow(WebView window) {
Log.d("onCloseWindow", "called");
}
}
我想要做的是获得以下输出，其中[{'quantity': '7', 'productUuid': '12345', 'unitPrice': 1234, 'name': 'apple'}, {'quantity': '7', 'productUuid': '12346', 'unitPrice': 4321, 'name': 'orange'}, {'quantity': '5', 'productUuid': '12345', 'unitPrice': 1234, 'name': 'apple'}]
被比较，并且为同一productUuid添加了数量以反映所述产品的总销售额：
productUuid我尝试了以下操作，将相关的键和值复制到一个列表中（我认为）更容易操作，但它不起作用，我觉得可能更容易解决我的问题。
[{'quantity': '12', 'productUuid': '12345', 'unitPrice': 1234, 'name': 'apple'}, {'quantity': '7', 'productUuid': '12346', 'unitPrice': 4321, 'name': 'orange'}]
感谢您的建议！
答案 0 :(得分：0)
最后花了更多的时间来完成它。我首先创建了一个uuids列表，然后迭代它以添加数量。
def add_quantities(json_list):
'''adds quantities for the same productUuid and returns a new dict with total quantities for each product'''
# create a list to store uuids and another to store purchase dicts
uuids = []
list_of_totals = []
for purchase in json_list:
if purchase['productUuid'] not in uuids:
uuids.append(purchase['productUuid'])
# iterate through list of uuids against dict and add quantities for corresponding uuids
for uuid in uuids:
uuid_qty = 0
totals = {}
for purchase in json_list:
if uuid in purchase['productUuid']:
uuid_qty = uuid_qty + int(purchase['quantity'])
unitPrice = purchase['unitPrice']
name = purchase['name']
totals.update({'productUuid': uuid, 'quantity': uuid_qty, 'unitPrice': unitPrice, 'name': name})
list_of_totals.append(totals)
return list_of_totals
欢迎任何使这更好的想法。