在Android平台上,当软键盘弹出时,可能会发现页面的某些元素被键盘遮挡或隐藏。如果你正在使用NativeScript开发应用程序,可能会遇到这个问题,其中包括在TextView元素下隐藏文字的情况。
为了解决这个问题,可以使用软键盘状态监听器来检测键盘的出现和消失,并相应地调整应用程序的布局。以下是一个解决方法,可以在NativeScript中实现:
1.在app.module.ts文件中导入相关模块:
import { NgModule, NO_ERRORS_SCHEMA } from "@angular/core"; import { NativeScriptModule } from "nativescript-angular/nativescript.module"; import { NativeScriptFormsModule } from "nativescript-angular/forms";
2.在组件中创建一个视图容器,并使用软键盘状态监听器来检测键盘的出现:
import { Component, ElementRef } from "@angular/core"; import { PlatformLocation } from '@angular/common'; import * as application from 'application'; import { isAndroid } from "platform"; import * as utils from "utils/utils";
@Component({ selector: "app-component", templateUrl: "./app.component.html" }) export class AppComponent{ public container: ElementRef;
constructor(private location: PlatformLocation) { this.location.onPopState(() => { if (application.android) { application.android.off(application.AndroidApplication.activityBackPressedEvent); } }); }
ngAfterViewInit() { this.container = this.containerElementRef.nativeElement; let layout = this.container.nativeElement; layout.getViewTreeObserver().addOnGlobalLayoutListener(new android.view.ViewTreeObserver.OnGlobalLayoutListener({ onGlobalLayout: function () { let top = layout.getY(); let bottom = utils.layout.toDevicePixels(application.android.startActivity.getWindow().getDecorView().getHeight()); let viewportHeight = bottom - top; let holderTop = utils.layout.toDevicePixels(layout.getChildAt(0).getTop()); if (holderTop + layout.getHeight() > viewportHeight) { layout.scrollTo(0, holderTop + layout.getHeight()