复写onkeyDown
@Override public boolean onKeyDown(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_BACK) { WebView webView = (WebView) findViewById(R.id.web_view); if(webView.canGoBack()){ webView.goBack(); return true; } } return super.onKeyDown(keyCode, event); }
当手机的返回键时 使用webview的goBack