如何从按钮HTML调用活动Android

Question

我想问如何从我的底部HTML调用Android Studio上的活动。

这是我的按钮html代码：

<button id="button" class="buttonHome" style="background:url(assets/scan.png)"></button>

这是我的java.activity:

@Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
this.architectView.onPostCreate();
try {
this.architectView.load("file:///android_asset/cobarealobjek/index.html");
} catch (IOException e) {
e.printStackTrace();
}
}

这是我的.xml:

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.geowikitudes.RealObjectActivity">
<com.wikitude.architect.ArchitectView
android:id="@+id/architectView_real"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
</com.wikitude.architect.ArchitectView>
</FrameLayout>

Answer 1

如果您可以选择使用WebView而不是ArchitectView，您可能需要尝试使用JavascriptInterface。

您必须为接口定义一个类，然后将其绑定到WebViewClient，例如AppInterface。

import android.webkit.JavascriptInterface;
import android.content.Context;
import android.content.Intent;
public class AppInterface {
Context mContext;
public AppInterface(Context context) {
mContext = context;
}
// This is where you define the methods you want to be able to call from your web app
// You have to annotate such methods with @JavascriptInterface
@JavascriptInterface
public void startMyActivity() {
Intent intent = new Intent();
intent.setClass(mContext, SecondActivity.class);  // Assuming SecondActivity is the name of activity you want to open
mContext.startActivity(intent);
}
}

在你的主要活动文件中，你可以有这样的东西：

import android.webkit.WebView;
import android.webkit.WebViewClient;
Webview webView;
WebViewClient webVC;
// ...
@Override
public void onCreate(Bundle savedInstanceState) {
// ...
webView = (WebView) findViewById(R.id.webview);  // Assuming you have a webview with the id of "webview" defined in your layout
webVC = WebViewClient();
webView.setWebViewClient(webVC);
webView.getSettings().setJavascriptEnabled(true);
webView.addJavascriptInterface(new AppInterface(this), "Android");  // You can set the second parameter to any other string, just make sure that you change it accordingly in your javascript
webView.loadUrl("yourURL");
// ...
}

最后，在HTML/javascript代码中，您需要通过提供的javascript接口调用函数：<button id="button" class="buttonHome" style="background:url(assets/scan.png)" onclick="Android.startMyActivity();"></button>

我希望这能有所帮助。