Android中js和原生交互的示例代碼

public class MainActivity extends Activity {
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    JavaScriptInterface JSInterface;
    WebView wv;
    wv = (WebView) findViewById(R.id.wv_test);
    wv.getSettings().setJavaScriptEnabled(true); ///------- 設(shè)置javascript 可用
    JSInterface = new JavaScriptInterface(this); ////------
    wv.addJavascriptInterface(JSInterface, "JSInterface"); // 設(shè)置js接口 第一個參數(shù)事件接口實例，第二個是實例在js中的別名，這個在js中會用到
    wv.loadUrl("file:///android_asset/test.html");
  }
}

public class JavaScriptInterface {
  Context mContext;
  JavaScriptInterface(Context c) {
    mContext = c;
  }

  @JavascriptInterface
  public void doSomething() {
   //點擊webwiew網(wǎng)頁里按鈕時候要做的事

  }
}