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【Harmony OS】【JAVA UI】webView动画加载资源加载动画交互

在HarmonyOS中webview加载网页的时候,需要有进度条,或者加载动画进行用户感知的交互,这样可以优化用户体验,因此今天写一篇加载动画(效果如下)用于同学们进行学习,怎么实现?首先我们需要学习“​​CommonDialog​​​”“ ​​WebView​​​”“​​动画开发指导​​​三个知识储备

我们分为“准备阶段”,“自定义CommonDialog实现”,“动画实现”,“webview的实现”,“运行效果”五个步骤进行实现。

【Harmony OS】【JAVA UI】webView动画加载资源加载动画交互_Java UI

1.准备阶段

在resources \base\ media\目录下准备一张loading图片(图片如下)存放位置如下

【Harmony OS】【JAVA UI】webView动画加载资源加载动画交互_webview_02

Loading图片

【Harmony OS】【JAVA UI】webView动画加载资源加载动画交互_webview_03

存放位置

2.       自定义CommonDialog的实现

2.1新建xml命名为general_dialog.xml,在该xml文件绘画一张图片(代码如下)

<?xml version="1.0" encoding="utf-8"?>

<DirectionalLayout

xmlns:ohos="http://schemas.huawei.com/res/ohos"

ohos:height="80vp"

ohos:orientation="vertical"

ohos:alignment="center"

ohos:width="80vp">

<Image

ohos:id="$+id:loading"

ohos:height="match_parent"

ohos:width="match_parent"

ohos:scale_mode="clip_center"

ohos:image_src="$media:loading"/>

</DirectionalLayout>

效果图如下【Harmony OS】【JAVA UI】webView动画加载资源加载动画交互_动画交互_04

2.2新建GeneralDialog文件,我们参考HarmonyOS 的​​自定义​​​​CommonDialog场景示例​​

具体代码如下

package com.harmony.alliance.mydemo.utils;

import java.util.Optional;

import com.harmony.alliance.mydemo.ResourceTable;
import ohos.agp.animation.Animator;
import ohos.agp.animation.AnimatorProperty;
import ohos.agp.animation.AnimatorValue;
import ohos.agp.colors.RgbColor;
import ohos.agp.components.*;
import ohos.agp.components.element.ShapeElement;
import ohos.agp.utils.LayoutAlignment;
import ohos.agp.window.dialog.CommonDialog;
import ohos.agp.window.service.WindowManager;
import ohos.app.Context;

public class GeneralDialog {
private float dim = -1f;
private CommonDialog sDialog;
private Context mContext;
private boolean mOutsideTouchClosable = false;
public GeneralDialog(Context context){
this.mContext=context;
}
public void show() {
if (sDialog != null) {
sDialog.show();
if (dim >= 0) {
changeDialogDim(sDialog, dim);
}
}
}
public void remove(){
if (sDialog != null) {
sDialog.destroy();
}
}
public void create() {
sDialog = new CommonDialog(mContext);
sDialog.setSize(ComponentContainer.LayoutConfig.MATCH_CONTENT, ComponentContainer.LayoutConfig.MATCH_CONTENT);
sDialog.setAlignment(LayoutAlignment.CENTER);
sDialog.setOffset(0,0);
sDialog.setTransparent(true);
sDialog.setContentCustomComponent(initDialog(sDialog));
sDialog.setAutoClosable(mOutsideTouchClosable);
}



private void changeDialogDim(CommonDialog dialog, float dim) {
Optional<WindowManager.LayoutConfig> configOpt = dialog.getWindow().getLayoutConfig();
configOpt.ifPresent(config -> {
config.dim = dim;
dialog.getWindow().setLayoutConfig(config);
});
}

public interface ClickedListener{
void onClick(GeneralDialog dialog);
}


private Component initDialog(CommonDialog sDialog) {
Component dialogLayout = LayoutScatter.getInstance(mContext).parse(ResourceTable.Layout_general_dialog, null, false);
dialogLayout.setBackground(new ShapeElement(){{
setRgbColor(RgbColor.fromArgbInt(ResourceTool.getColor(mContext, ResourceTable.Color_bg_dialog_light, 0xffffff)));
setCornerRadius(ResourceTool.getFloat(mContext, ResourceTable.Float_dialog_corner_radius, 0));
}});
Image image= (Image) dialogLayout.findComponentById(ResourceTable.Id_loading);

return dialogLayout;
}

}

 2.2.3在MainAbility的onStart的方法下调用如下代码

GeneralDialog mGeneralDialog = new GeneralDialog(getContext());

mGeneralDialog.create();

mGeneralDialog.show();

效果如下

【Harmony OS】【JAVA UI】webView动画加载资源加载动画交互_自定义_05

2.3动画实现

2.3.1动画的功能我们可以参考HarmonyOS​​动画开发指导​​​​AnimatorProperty​​的相关知识点,接下来我们initDialog开启image的动画功能代码如下

Image image= (Image) dialogLayout.findComponentById(ResourceTable.Id_loading);

animatorProperty = new AnimatorProperty();

animatorProperty.setTarget(image);

animatorProperty

.rotate(360)

//无限循环

.setLoopedCount(AnimatorValue.INFINITE)

//反弹力效果

.setCurveType(Animator.CurveType.BOUNCE);



if(sDialog!=null){

sDialog.setDestroyedListener(new CommonDialog.DestroyedListener() {

@Override

public void onDestroy() {

if(animatorProperty.isRunning()){

animatorProperty.stop();

}

}

});

}

2.3.2在GeneralDialog类写一个开启动画方法(代码如下)

public void   StartanimatorProperty(){

if(animatorProperty!=null&&animatorProperty.isRunning()){

animatorProperty.stop();

}

if(animatorProperty!=null&&!animatorProperty.isRunning()){

if(!animatorProperty.isRunning()){

animatorProperty.start();

}

}

}

2.3.3封一个工具类用于显示和播放和消失loading弹框(代码如下)

package com.harmony.alliance.mydemo.utils;

import ohos.app.Context;

public class LoadingDialogUtils {
private static GeneralDialog mGeneralDialog;
public static GeneralDialog getInstance(Context mContext){
if(mGeneralDialog==null){
mGeneralDialog=new GeneralDialog(mContext);
}
return mGeneralDialog;
}

public static void show(Context mContext){
LoadingDialogUtils.getInstance(mContext);
mGeneralDialog.create();
mGeneralDialog.show();
mGeneralDialog.StartanimatorProperty();
}
public static void dismiss(Context mContext){
LoadingDialogUtils.getInstance(mContext);
mGeneralDialog.remove();
}
}

2.3.4开启动画代码如下

LoadingDialogUtils.show(MainAbility.this);

关闭动画代码如下

LoadingDialogUtils.dismiss(MainAbility.this);

 2.4   webview的实现

webview 加载网页我们可以参考HarmonyOS的​​WebView的组件​​

2.4.1我们学观测​​Web状态的setWebAgent​​(代码如下)

webView.setWebAgent(new WebAgent() {

@Override

public void onLoadingPage(WebView webview, String url, PixelMap favicon) {

super.onLoadingPage(webview, url, favicon);

//todo 页面开始加载时自定义处理 开启动画

}



@Override

public void onPageLoaded(WebView webview, String url) {

super.onPageLoaded(webview, url);

// todo 页面加载结束后自定义处理 关闭动画

}



@Override

public void onLoadingContent(WebView webview, String url) {

super.onLoadingContent(webview, url);

// 加载资源时自定义处理

}



@Override

public void onError(WebView webview, ResourceRequest request, ResourceError error) {

super.onError(webview, request, error);

//todo 发生错误时自定义处理 关闭动画

}

});

2.4.2我们新建abilitySlice的java类,新建layout布局代码如下

<?xml version="1.0" encoding="utf-8"?>

<DirectionalLayout

xmlns:ohos="http://schemas.huawei.com/res/ohos"

ohos:height="match_parent"

ohos:width="match_parent"

ohos:orientation="vertical">

<ohos.agp.components.webengine.WebView

ohos:id="$+id:my_webView"

ohos:height="match_parent"

ohos:width="match_parent">

</ohos.agp.components.webengine.WebView>



</DirectionalLayout>

2.4.3 webview的java类代码如下

package com.harmony.alliance.mydemo.slice;

import com.harmony.alliance.mydemo.ResourceTable;
import com.harmony.alliance.mydemo.utils.LoadingDialogUtils;
import ohos.aafwk.ability.AbilitySlice;
import ohos.aafwk.content.Intent;
import ohos.agp.components.webengine.*;
import ohos.media.image.PixelMap;

public class NewMyWebview extends AbilitySlice {
private WebView mMyWebview;
private static final String EXAMPLE_URL = "https://developer.harmonyos.com/cn/docs/documentation/doc-references/js-apis-fa-calls-pa-examples-0000000000618000";
@Override
protected void onStart(Intent intent) {
super.onStart(intent);
setUIContent(ResourceTable.Layout_new_my_webview);
mMyWebview= (WebView) findComponentById(ResourceTable.Id_my_webView);
WebConfig webConfig = mMyWebview.getWebConfig();
webConfig.setJavaScriptPermit(true);
webConfig.setWebStoragePermit(true);
webConfig.setDataAbilityPermit(true);
webConfig.setLoadsImagesPermit(true);
webConfig.setMediaAutoReplay(true);
webConfig.setLocationPermit(true);
webConfig.setSecurityMode(WebConfig.SECURITY_SELF_ADAPTIVE);
mMyWebview.setWebAgent(new WebAgent() {
@Override
public void onLoadingPage(WebView webview, String url, PixelMap favicon) {
super.onLoadingPage(webview, url, favicon);
//todo 页面开始加载时自定义处理 开启动画
LoadingDialogUtils.show(NewMyWebview.this);
}

@Override
public void onPageLoaded(WebView webview, String url) {
super.onPageLoaded(webview, url);
// todo 页面加载结束后自定义处理 关闭动画
LoadingDialogUtils.dismiss(NewMyWebview.this);
}

@Override
public void onLoadingContent(WebView webview, String url) {
super.onLoadingContent(webview, url);
// 加载资源时自定义处理
}

@Override
public void onError(WebView webview, ResourceRequest request, ResourceError error) {
super.onError(webview, request, error);
//todo 发生错误时自定义处理 关闭动画
LoadingDialogUtils.dismiss(NewMyWebview.this);
}
});
mMyWebview.load(EXAMPLE_URL);


}
}

2.5   运行效果如下

全部代码如下

2.5.1general_dialog.xml代码

<?xml version="1.0" encoding="utf-8"?>

<DirectionalLayout

xmlns:ohos="http://schemas.huawei.com/res/ohos"

ohos:height="80vp"

ohos:orientation="vertical"

ohos:alignment="center"

ohos:width="80vp">

<Image

ohos:id="$+id:loading"

ohos:height="match_parent"

ohos:width="match_parent"

ohos:scale_mode="clip_center"

ohos:image_src="$media:loading"/>



</DirectionalLayout>

2.5.2GeneralDialog的java类

//请根据实际工程/包名引入

package com.harmony.alliance.mydemo.utils;



import java.util.Optional;



import com.harmony.alliance.mydemo.ResourceTable;

import ohos.agp.animation.Animator;

import ohos.agp.animation.AnimatorProperty;

import ohos.agp.animation.AnimatorValue;

import ohos.agp.colors.RgbColor;

import ohos.agp.components.*;

import ohos.agp.components.element.ShapeElement;

import ohos.agp.utils.LayoutAlignment;

import ohos.agp.window.dialog.CommonDialog;

import ohos.agp.window.service.WindowManager;

import ohos.app.Context;



public class GeneralDialog {

private float dim = -1f;

private AnimatorProperty animatorProperty;

private CommonDialog sDialog;

private Context mContext;

private boolean mOutsideTouchClosable = false;

public GeneralDialog(Context context){

this.mContext=context;

}

public void show() {

if (sDialog != null) {

sDialog.show();

if (dim >= 0) {

changeDialogDim(sDialog, dim);

}

}

}

public void remove(){

if (sDialog != null) {

sDialog.destroy();

}

}

public void create() {

sDialog = new CommonDialog(mContext);

sDialog.setSize(ComponentContainer.LayoutConfig.MATCH_CONTENT, ComponentContainer.LayoutConfig.MATCH_CONTENT);

sDialog.setAlignment(LayoutAlignment.CENTER);

sDialog.setOffset(0,0);

sDialog.setTransparent(true);

sDialog.setContentCustomComponent(initDialog(sDialog));

sDialog.setAutoClosable(mOutsideTouchClosable);

}



public void StartanimatorProperty(){

if(animatorProperty!=null&&animatorProperty.isRunning()){

animatorProperty.stop();

}

if(animatorProperty!=null&&!animatorProperty.isRunning()){

if(!animatorProperty.isRunning()){

animatorProperty.start();

}

}

}



private void changeDialogDim(CommonDialog dialog, float dim) {

Optional<WindowManager.LayoutConfig> configOpt = dialog.getWindow().getLayoutConfig();

configOpt.ifPresent(config -> {

config.dim = dim;

dialog.getWindow().setLayoutConfig(config);

});

}



public interface ClickedListener{

void onClick(GeneralDialog dialog);

}





private Component initDialog(CommonDialog sDialog) {

Component dialogLayout = LayoutScatter.getInstance(mContext).parse(ResourceTable.Layout_general_dialog, null, false);

dialogLayout.setBackground(new ShapeElement(){{

setRgbColor(RgbColor.fromArgbInt(ResourceTool.getColor(mContext, ResourceTable.Color_bg_dialog_light, 0xffffff)));

setCornerRadius(ResourceTool.getFloat(mContext, ResourceTable.Float_dialog_corner_radius, 0));

}});

Image image= (Image) dialogLayout.findComponentById(ResourceTable.Id_loading);

animatorProperty = new AnimatorProperty();

animatorProperty.setTarget(image);

animatorProperty

.rotate(360)

//无限循环

.setLoopedCount(AnimatorValue.INFINITE)

//反弹力效果

.setCurveType(Animator.CurveType.BOUNCE);



if(sDialog!=null){

sDialog.setDestroyedListener(new CommonDialog.DestroyedListener() {

@Override

public void onDestroy() {

if(animatorProperty.isRunning()){

animatorProperty.stop();

}

}

});

}

return dialogLayout;

}



}

2.5.3LoadingDialogUtils的工具类如下

package com.harmony.alliance.mydemo.utils;



import ohos.app.Context;



public class LoadingDialogUtils {

private static GeneralDialog mGeneralDialog;

private static GeneralDialog getInstance(Context mContext){

if(mGeneralDialog==null){

mGeneralDialog=new GeneralDialog(mContext);

}

return mGeneralDialog;

}



public static void show(Context mContext){

LoadingDialogUtils.getInstance(mContext);

mGeneralDialog.create();

mGeneralDialog.show();

mGeneralDialog.StartanimatorProperty();

}

public static void dismiss(Context mContext){

LoadingDialogUtils.getInstance(mContext);

mGeneralDialog.remove();

}

}

2.5.4webViewAbilitySlice的layout的xml代码如下

<?xml version="1.0" encoding="utf-8"?>

<DirectionalLayout

xmlns:ohos="http://schemas.huawei.com/res/ohos"

ohos:height="match_parent"

ohos:width="match_parent"

ohos:orientation="vertical">

<ohos.agp.components.webengine.WebView

ohos:id="$+id:my_webView"

ohos:height="match_parent"

ohos:width="match_parent">

</ohos.agp.components.webengine.WebView>



</DirectionalLayout>

2.5.5 WebViewAbiltySlice的类代码如下

package com.harmony.alliance.mydemo.slice;



import com.harmony.alliance.mydemo.ResourceTable;

import com.harmony.alliance.mydemo.utils.LoadingDialogUtils;

import ohos.aafwk.ability.AbilitySlice;

import ohos.aafwk.content.Intent;

import ohos.agp.components.webengine.*;

import ohos.media.image.PixelMap;



public class NewMyWebview extends AbilitySlice {

private WebView mMyWebview;

private static final String EXAMPLE_URL = "https://developer.harmonyos.com/cn/docs/documentation/doc-references/js-apis-fa-calls-pa-examples-0000000000618000";

@Override

protected void onStart(Intent intent) {

super.onStart(intent);

setUIContent(ResourceTable.Layout_new_my_webview);

mMyWebview= (WebView) findComponentById(ResourceTable.Id_my_webView);

WebConfig webConfig = mMyWebview.getWebConfig();

webConfig.setJavaScriptPermit(true);

webConfig.setWebStoragePermit(true);

webConfig.setDataAbilityPermit(true);

webConfig.setLoadsImagesPermit(true);

webConfig.setMediaAutoReplay(true);

webConfig.setLocationPermit(true);

webConfig.setSecurityMode(WebConfig.SECURITY_SELF_ADAPTIVE);

mMyWebview.setWebAgent(new WebAgent() {

@Override

public void onLoadingPage(WebView webview, String url, PixelMap favicon) {

super.onLoadingPage(webview, url, favicon);

//todo 页面开始加载时自定义处理 开启动画

LoadingDialogUtils.show(NewMyWebview.this);

}



@Override

public void onPageLoaded(WebView webview, String url) {

super.onPageLoaded(webview, url);

// todo 页面加载结束后自定义处理 关闭动画

LoadingDialogUtils.dismiss(NewMyWebview.this);

}



@Override

public void onLoadingContent(WebView webview, String url) {

super.onLoadingContent(webview, url);

// 加载资源时自定义处理

}



@Override

public void onError(WebView webview, ResourceRequest request, ResourceError error) {

super.onError(webview, request, error);

//todo 发生错误时自定义处理 关闭动画

LoadingDialogUtils.dismiss(NewMyWebview.this);

}

});

mMyWebview.load(EXAMPLE_URL);

}

}

效果如下

【Harmony OS】【JAVA UI】webView动画加载资源加载动画交互_自定义_06


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