我需要拥有默认铃声的URI。
我可以使用此代码
获得默认铃声import { Component, NgModule, VERSION } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { Observable } from 'rxjs/Observable';
import { Subject } from 'rxjs/Subject';
import 'rxjs/add/operator/filter';
import 'rxjs/add/operator/do';
import 'rxjs/add/operator/switchMap';
@Component({
selector: 'my-app',
template: `
<button (click)="model.on = !model.on; userClick$.next()">{{ model.on ? 'Stop' : 'Start' }}</button>
<h1>Numbers stream</h1>
<div *ngFor="let numberValue of (numbers$ | async)">
<h2>{{ numberValue }}</h2>
</div>
<label>{{ model.log }}</label>
`,
})
export class App {
model = {
on: false,
log: ''
}
userClick$ = new Subject<void>();
numbers$: Observable<number[]> = this.userClick$
.filter(() => !!this.model.on)
.do(() => this.model.log = '')
.switchMap(() => this.getRandomNumber())
.switchMap((num) => this.getExpNumber(num))
.switchMap((num) => this.getFloor(num))
.switchMap((num) => this.getCeil(num));
constructor() {
}
/**
* Runs after user click
*/
getRandomNumber(): Observable<number[]> {
return new Observable<number[]>(observer => {
this.model.log += ' getRandomNumber';
observer.next([Math.floor(Math.random() * 10) + 1]);
return () => {}
}
}
/**
* Depends on getRandomNumber and run after it
*/
getExpNumber(n: number): Observable<number[]> {
return new Observable<number[]>(observer => {
this.model.log += ' getExpNumber';
observer.next([Math.floor(Math.exp(n)]);
return () => {}
}
}
/**
* Runs in parallel with getCeil
*/
getFloor(n: number): Observable<number[]> {
return new Observable<number[]>(observer => {
this.model.log += ' getFloor';
observer.next([Math.floor(n)]);
return () => {}
}
}
/**
* Runs in parallel with getFloor
*/
getCeil(n: number): Observable<number[]> {
return new Observable<number[]>(observer => {
this.model.log += ' getCeil';
observer.next([Math.ceil(n)]);
return () => {}
}
}
}
@NgModule({
imports: [ BrowserModule ],
declarations: [ App ],
bootstrap: [ App ]
})
export class AppModule {}
在rt(铃声)中,我可以在截图中看到mUri,但它不是公共财产,所以我不能拥有它。
我怎么能拥有这个属性?
注意:RingtoneManager.java中有一个getUri,但它是隐藏的。
Uri uri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_RINGTONE);
Ringtone rt = RingtoneManager.getRingtone(context,uri);
答案 0 :(得分:0)
String directoryName = null;
try {
directoryName = "/parent_folder/sub-folder/";
String filePath = new File("").getAbsolutePath();
filePath.concat(directoryName);
File directory = new File(filePath);
if (! directory.exists()){
boolean created = directory.mkdirs();
if (!created) {
//TODO: add your code here
}
}
} catch (Exception e) {
e.printStackTrace();
}
答案 1 :(得分:0)
A &a = b;
希望这适合你! :)