效果图：
1、android端代码：
package io.github.xudaojie.qrcode;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.Window;
import android.webkit.GeolocationPermissions;
import android.webkit.JavascriptInterface;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
private static final int REQUEST_QR_CODE = 1;
private WebView webview;
//加载的目标url
private static final String WEB_URL = "file:///android_asset/index.html";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
}
private void initView() {
webview = (WebView) findViewById(R.id.webview);
WebSettings settings = webview.getSettings();
//打开js和安卓通信
settings.setJavaScriptEnabled(true);
//打开h5定位
settings.setDomStorageEnabled(true);
settings.setGeolocationEnabled(true);
//加载本地assets目录下的网页
webview.loadUrl(WEB_URL);
webview.setWebViewClient(new MyWebViewClient());
webview.setWebChromeClient(new MyWebChromeClient());
//核心方法, 用于处理js被执行后的回调;//参1是回调接口的实现类;参2是js回调对象的名称
//JS调用方式:window.iosAndroid.xxx,xxx为JsInterface的方法名称
webview.addJavascriptInterface(new JsInterface(), "iosAndroid");
}
/**
* WebViewClient客户端
*/
class MyWebViewClient extends WebViewClient {
@Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
}
@Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
}
}
/**
* WebChromeClient客户端
*/
class MyWebChromeClient extends WebChromeClient {
@Override
public void onProgressChanged(WebView view, int newProgress) {
super.onProgressChanged(view, newProgress);
}
@Override
public void onReceivedTitle(WebView view, String title) {
super.onReceivedTitle(view, title);
}
//开启才能使用H5定位
@Override
public void onGeolocationPermissionsShowPrompt(String origin, GeolocationPermissions.Callback callback) {
callback.invoke(origin, true, true);
super.onGeolocationPermissionsShowPrompt(origin, callback);
}
}
/**
* 给js调用的接口
*/
class JsInterface {
/**
* 注意:此处一定要加该注解,否则在4.1+系统上运行失败
* 打开摄像头扫描
*/
@JavascriptInterface
public void openQrScaner() {
System.out.println("js调用Android啦");
Intent i = new Intent(MainActivity.this, SimpleCaptureActivity.class);
MainActivity.this.startActivityForResult(i, REQUEST_QR_CODE);
}
}
/**
* 获取扫描结果
*
* @param requestCode
* @param resultCode
* @param data
*/
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
webview.loadUrl("javascript:openURL(" + 123456789 + ")");
if (resultCode == RESULT_OK && requestCode == REQUEST_QR_CODE && data != null) {
String result = data.getStringExtra("result");
Toast.makeText(MainActivity.this, result, Toast.LENGTH_SHORT).show();
}
}
}
2、html代码：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>demo001</title>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no"/>
</head>
<body>
<button id="btn">二维码扫描</button>
<script type="text/javascript">
var btn = document.getElementById("btn");
btn.onclick = function () {
//调用android的方法,webview.addJavascriptInterface(new JsInterface(), "iosAndroid");
window.iosAndroid.openQrScaner();
}
//给android调用的方法，并传递参数orderid
function openURL(orderid) {
window.location.href = "https://www.baidu.com/?orderid=" + orderid;
}
</script>
</body>
</html>