webview加载html5网页访问android 代码 - 黑马程序员技术交流社区

package com.testwebview;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.widget.Button;
import android.widget.Toast;
public class MainActivity extends Activity {
private WebView mWebView;
private Button androidCallJSBtn;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
}
@SuppressLint({ "JavascriptInterface", "SetJavaScriptEnabled" })
private void initView() {
mWebView = (WebView) findViewById(R.id.webview);
WebSettings mWebSettings = mWebView.getSettings();
mWebSettings.setJavaScriptEnabled(true); //加上这句话才能使用javascript方法
mWebView.addJavascriptInterface(new Object() {//增加接口方法,让html页面调用
public void callJavaMethod() {
Toast.makeText(getApplicationContext(), "JS调用Android成功", Toast.LENGTH_LONG).show();
}
}, "demo");
mWebView.loadUrl("file:///android_asset/demo.html"); //加载页面
androidCallJSBtn = (Button) findViewById(R.id.androidCallJSBtn);
androidCallJSBtn.setOnClickListener(new Button.OnClickListener() { //给button添加事件响应,执行JavaScript的fillContent()方法
public void onClick(View v) {
mWebView.loadUrl("javascript:callJavaScriptMethod()");
}
});
}
}

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