Try Android and JS interaction

Use WebView to invoke the JS code on the Web page in 1.android.

Android can be implemented by WebView and JS Interaction, in the program to invoke the JS code, only the WebView control of the support JS property set to True, and then through the Loadurl can be directly called, as follows:

Mwebview.getsettings (). Setjavascriptenabled (True);

Mwebview.loadurl ("Javascript:test ()");

2. How to invoke Java code in Android on a Web page

Calling Java code in a Web page requires adding javascriptinterface to the WebView control. As shown below:

Mwebview.addjavascriptinterface (New Object () {

public void Clickonandroid () {

Mhandler.post (New Runnable () {

public void Run () {

Toast.maketext (test.this, "Test call Java", Toast.length_long). Show ();

}

});

}

}, "demo");

In the Web page, just like invoking the JS method, the call can be

<div id= ' B ' ><a onclick= "window.demo.clickOnAndroid ()" >b.c</a></div>

3. Java code calls JS and passes the parameter

First you need a JS function with parameters, such as function Test (str), and then simply pass in the parameters when you call JS, as follows:

Mwebview.loadurl ("Javascript:test (' AA ')");

Call Java functions and pass parameters in 4.Js

First, you need the function form with parameters, but be aware that the parameter here requires the final type, that is, you can not modify it later, if you need to modify the value, you may set the intermediate variable, and then modify. As shown below:

Mwebview.addjavascriptinterface (New Object () {

public void clickonandroid (final int i) {

Mhandler.post (New Runnable () {

public void Run () {

int j = i;

j + +;

Toast.maketext (test.this, "Test call Java" + string.valueof (j), Toast.length_long). Show ();

}

});

}

}, "demo");

Then in the HTML page, use the following code <div id= ' B ' ><a onclick= "window.demo.clickOnAndroid (2)" >B.C</A></DIV>

Try Android and JS interaction