无论如何使用router.navigate将数据作为参数发送? 我的意思是,像this这样的例子,因为你可以看到路线有一个数据参数,但这样做它不起作用:
public class ListViewAdapter extends BaseAdapter {
// Declare Variables
Context mContext;
LayoutInflater inflater;
private List<AnimalNames> animalNamesList = null;
private ArrayList<AnimalNames> arraylist;
public ListViewAdapter(Context context, List<AnimalNames> animalNamesList) {
mContext = context;
this.animalNamesList = animalNamesList;
inflater = LayoutInflater.from(mContext);
this.arraylist = new ArrayList<AnimalNames>();
this.arraylist.addAll(animalNamesList);
}
public class ViewHolder {
TextView name;
}
@Override
public int getCount() {
return animalNamesList.size();
}
@Override
public AnimalNames getItem(int position) {
return animalNamesList.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
public View getView(final int position, View view, ViewGroup parent) {
final ViewHolder holder;
if (view == null) {
holder = new ViewHolder();
view = inflater.inflate(R.layout.listview_item, null);
// Locate the TextViews in listview_item.xml
holder.name = (TextView) view.findViewById(R.id.name);
view.setTag(holder);
} else {
holder = (ViewHolder) view.getTag();
}
// Set the results into TextViews
holder.name.setText(animalNamesList.get(position).getAnimalName());
return view;
}
// Filter Class
public void filter(String charText) {
charText = charText.toLowerCase(Locale.getDefault());
animalNamesList.clear();
if (charText.length() == 0) {
animalNamesList.addAll(arraylist);
} else {
for (AnimalNames wp : arraylist) {
if (wp.getAnimalName().toLowerCase(Locale.getDefault()).contains(charText)) {
animalNamesList.add(wp);
}
}
}
notifyDataSetChanged();
}
////Here My problem starts :
public static SpannableString highlightKeyword(CharSequence text, Pattern p, int fgcolor, int bgcolor) {
SpannableString ss = new SpannableString(text);
ColorStateList blueColor = new ColorStateList(new int[][]{new int[]{}}, new int[]{Color.BLUE});
int start = 0;
int end;
Matcher m = p.matcher(text);
while (m.find(start)) {
start = m.start();
end = m.end();
BackgroundColorSpan bgspan = new BackgroundColorSpan(bgcolor);
ss.setSpan(bgspan, start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
ForegroundColorSpan fgspan = new ForegroundColorSpan(fgcolor);
ss.setSpan(fgspan, start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
start = end;
}
return ss;
}
////But even did not the result word highlighted.
因为某些数据不是有效参数。我怎样才能做到这一点?我不想用queryParams发送参数。
答案 0 :(得分:294)
关于这个主题存在很多困惑,因为有很多不同的方法可以做到这一点。
以下是以下屏幕截图中使用的相应类型:
private route: ActivatedRoute
private router: Router
1)必需的路由参数:
2)路由可选参数:
3)路由查询参数:
4)您可以使用服务将数据从一个组件传递到另一个组件,而不使用路由参数。
有关示例,请参阅:https://blogs.msmvps.com/deborahk/build-a-simple-angular-service-to-share-data/
我有一个这方面的人:https://plnkr.co/edit/KT4JLmpcwGBM2xdZQeI9?p=preview
答案 1 :(得分:44)
Angular 7.2.0附带了一种新方法
https://angular.io/api/router/NavigationExtras#state
发送:
this.router.navigate(['action-selection'], { state: { example: 'bar' } });
收到:
constructor(private router: Router) {
console.log(this.router.getCurrentNavigation().extras.state.example); // should log out 'bar'
}
您可以在此处找到一些其他信息:
https://github.com/angular/angular/pull/27198
上面的链接包含此示例,可能会有用: https://stackblitz.com/edit/angular-bupuzn
答案 2 :(得分:6)
你可以用它。 Angular2 + / 4/5 - 使用数据导航 https://github.com/Hipparch/Angular2-navigate-with-data
答案 3 :(得分:4)
最新版本的angular(7.2 +)现在可以选择使用 NavigationExtras 传递其他信息。
主页组件
import {
Router,
NavigationExtras
} from '@angular/router';
const navigationExtras: NavigationExtras = {
state: {
transd: 'TRANS001',
workQueue: false,
services: 10,
code: '003'
}
};
this.router.navigate(['newComponent'], navigationExtras);
newComponent
test: string;
constructor(private router: Router) {
const navigation = this.router.getCurrentNavigation();
const state = navigation.extras.state as {
transId: string,
workQueue: boolean,
services: number,
code: string
};
this.test = "Transaction Key:" + state.transId + "<br /> Configured:" + state.workQueue + "<br /> Services:" + state.services + "<br /> Code: " + state.code;
}
输出
希望这会有所帮助!
答案 4 :(得分:0)
为此我在互联网上发现的最好的是ngx-navigation-with-data。 对于将数据从一个组件导航到另一组件而言,这非常简单且有益。 您只需要导入组件类并以非常简单的方式使用它即可。 假设您有住所和关于组件,然后想要发送数据
家庭组件
echo "some text" >> file.txt
关于组件
import { Component, OnInit } from '@angular/core';
import { NgxNavigationWithDataComponent } from 'ngx-navigation-with-data';
@Component({
selector: 'app-home',
templateUrl: './home.component.html',
styleUrls: ['./home.component.css']
})
export class HomeComponent implements OnInit {
constructor(public navCtrl: NgxNavigationWithDataComponent) { }
ngOnInit() {
}
navigateToABout() {
this.navCtrl.navigate('about', {name:"virendta"});
}
}
对于任何查询,请遵循https://www.npmjs.com/package/ngx-navigation-with-data
留言寻求帮助。
答案 5 :(得分:0)
@ dev-nish您的代码可以进行一些小的调整。 制作
const navigationExtras: NavigationExtras = {
state: {
transd: 'TRANS001',
workQueue: false,
services: 10,
code: '003'
}
};
进入
let navigationExtras: NavigationExtras = {
state: {
transd: '',
workQueue: ,
services: ,
code: ''
}
};
然后,如果您要专门发送某种类型的数据(例如,由于表单填写而导致的JSON),则可以按照前面说明的相同方式发送数据。
答案 6 :(得分:0)
在navigationExtra中,我们只能传递某些特定名称作为参数,否则它将显示错误,如下所示: 对于Ex-,我想在路由器导航中传递客户密钥,然后像这样传递-
this.Router.navigate(['componentname'],{cuskey: {customerkey:response.key}});
但是它显示出如下错误:
Argument of type '{ cuskey: { customerkey: any; }; }' is not assignable to parameter of type 'NavigationExtras'.
Object literal may only specify known properties, and 'cuskey' does not exist in type 'NavigationExt## Heading ##ras'
。
解决方案: 我们必须这样写:
this.Router.navigate(['componentname'],{state: {customerkey:response.key}});