android webview 獲取網頁form提交的資料

public class WebActivity extends BaseActivity {
    @ViewInject(R.id.web_view)
    private WebView mWebView;
    @ViewInject(R.id.tv_title_center)
    private TextView mTitle;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_faq);
        ViewUtils.inject(this);
        String title = getIntent().getStringExtra("title");
        if (!TextUtils.isEmpty(title)) {
            mTitle.setText(title);
        } else {
            findViewById(R.id.layout_title).setVisibility(View.GONE);
        }


        mWebView.addJavascriptInterface(new JavaScriptInterface(), "JSInterface");

        String url = getIntent().getStringExtra("url");
        mWebView.getSettings().setJavaScriptEnabled(true);
        mWebView.loadUrl(url);
        mWebView.setWebViewClient(new WebViewClient() {
            @Override
            public boolean shouldOverrideUrlLoading(WebView view, String url) {
                view.loadUrl(url);
                return true;
            }

            @Override
            public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
                handler.proceed();
            }

            @Override
            public void onPageFinished(WebView view, String url) {
                super.onPageFinished(view, url);
                view.loadUrl("javascript:" + buildInjection());
            }

        });
    }

    private String buildInjection() {
        StringBuilder sb = new StringBuilder();
        sb.append("document.getElementsByTagName('form')[0].onsubmit = function () {");
        sb.append("var applyname, pccc_applyname;var str = '';");
        sb.append("var inputs = document.getElementsByTagName('input');");
        sb.append("for (var i = 0; i < inputs.length; i++) {");
        sb.append("if (inputs[i].name.toLowerCase() === 'applyname') {applyname = inputs[i];}");
        sb.append("else if (inputs[i].name.toLowerCase() === 'pccc_applyname') {pccc_applyname= inputs[i];}");
        sb.append("}");
        sb.append("if (pccc_applyname!= null) {str += pccc_applyname.value;}");
        sb.append("if (applyname!= null) { str += ' , ' + applyname.value;}");
        sb.append("window.JSInterface.processFormInputs(str);");
        sb.append("return true;");
        sb.append("};");
        return sb.toString();
    }

    @OnClick(R.id.iv_tools_left)
    public void onBack(View view) {
        finish();
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_BACK && mWebView.canGoBack()) {
            mWebView.goBack();// 返回前一個頁面
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }

    class JavaScriptInterface {
        @JavascriptInterface
        public void processFormInputs(String html) {
            LogUtils.e("html-->" + html);
        }
    }
}