android java和js交互

android本地java代码和javascript的交互

java调用js

mWebView = (WebView) findViewById(R.id.web_view);
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.addJavascriptInterface(this, "jsbridge");
mWebView.loadUrl("file:///android_asset/demo_java_js_call.html");

不带参数

mBtnJavaCallJsWithoutParam.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mWebView.loadUrl("javascript:java_call_js_without_param()");
}
});

带参数

mBtnJavaCallJsWithParam.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String param = "'a param from java'";//注意引号
mWebView.loadUrl("javascript:java_call_js_with_param("
+ param
+ ")"
);
}
});

js调用java

mWebView.addJavascriptInterface(this, "jsbridge");

不带参数

js:
<a onClick="window.jsbridge.callFromJs()">点击这里-->调用java代码，无参数</a><br/>

java:
@JavascriptInterface
public void callFromJs() {
Toast.makeText(this, "callFromJs, 无参", Toast.LENGTH_LONG).show();
}

带参数

js:
<a onClick="window.jsbridge.callFromJsWithParam('来自js的参数')">点击这里-->调用java代码并传递参数</a><br/>

java:
@JavascriptInterface
public void callFromJsWithParam(String param) {
Toast.makeText(this, "callFromJs, 参数是：" + param, Toast.LENGTH_LONG).show();
}

其他