有需要与h5通信的需求，写了一个helper类，处理与h5通信。
import android.content.Context;
import android.os.Handler;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.View;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
/**
* Created by Awen on 2016/12/14.
*/
public class WebViewHelper {
private final String CALLJS = "javascript:%s(%s)";
private WebView myBrowser;
private MyJavaScriptInterface myJavaScriptInterface;
private Handler mHandler; public WebViewHelper(WebView myBrowser, MyJavaScriptInterface myJavaScriptInterface, Handler handler) {
this.myBrowser = myBrowser;
this.myJavaScriptInterface = myJavaScriptInterface;
this.mHandler = handler;
} public void initWebView(String url) {
WebSettings webSettings = myBrowser.getSettings();
myBrowser.addJavascriptInterface(myJavaScriptInterface, "JavaScriptInterface");
webSettings.setJavaScriptEnabled(true);
webSettings.setAllowFileAccess(true);// 设置允许访问文件数据
webSettings.setSupportZoom(false);
webSettings.setBuiltInZoomControls(true);
webSettings.setJavaScriptCanOpenWindowsAutomatically(true);
webSettings.setCacheMode(WebSettings.LOAD_NO_CACHE);
webSettings.setDomStorageEnabled(true); //myBrowser.loadUrl(Config.getServerAddress().replace("/server", url));
myBrowser.loadUrl("http://192.168.1.14/h5" + url);
myBrowser.setWebViewClient(new WebViewClient() {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
});
myBrowser.setOnKeyListener(new View.OnKeyListener() {
@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK
&& event.getAction() == MotionEvent.ACTION_UP
&& myBrowser.canGoBack()) {
mHandler.sendEmptyMessage(0);
return true;
} return false;
} });
myBrowser.setWebChromeClient(new WebChromeClient());
} public static abstract class MyJavaScriptInterface {
protected Context mContext; public MyJavaScriptInterface() {
mContext = WtpApplication.getInstance();
} public abstract void requestShopId();
} public void callJs(String method, Object... param) {
String format = String.format(CALLJS, method, getParam(param));
myBrowser.loadUrl(format);
} public void callJsIntegerParam(String method, Object param) {
String tmp = (String) param;
while (tmp.length() > 1 && tmp.indexOf("0") == 0) {
tmp = tmp.replaceFirst("0", "");
}
callJs(method, tmp);
} private String getParam(Object... param) {
if (param == null || param.length < 1)
return "";
StringBuilder sb = new StringBuilder("");
for (Object str : param) {
sb.append("'").append(str).append("',");
}
return sb.deleteCharAt(sb.length()-1).toString();
} /**
* 返回上几步
* @param step 步数，为负数
*/
public void backStep(int step) {
if (myBrowser.canGoBackOrForward(step))
myBrowser.goBackOrForward(step);
}
}
调用类
public class TencentZoneFragment extends BaseSupperFragment<MainEvent> {
private final int SET_SHOP_ID = 1;
private final int SHOW_TOAST = 2;
@ViewById(R.id.wv_web)
WebView myBrowser; private WebViewHelper webViewHelper; @Override
public void initData() {
TencentJavaScriptInterface tencentJavaScriptInterface = new TencentJavaScriptInterface();
webViewHelper = new WebViewHelper(myBrowser, tencentJavaScriptInterface, handler);
webViewHelper.initWebView("/h5.html");
} @Override
public void onEventMainThread(MainEvent event) {
switch (event.getEventId()) {
case MainEvent.CLEAR_INFO:
int step = -2;
webViewHelper.backStep(step);
break;
}
}
public class TencentJavaScriptInterface extends WebViewHelper.MyJavaScriptInterface { @JavascriptInterface
public void requestShopId() {
handler.sendEmptyMessage(SET_SHOP_ID);
} @JavascriptInterface
public void showToast(String msg) {
Message message = Message.obtain();
message.what = SHOW_TOAST;
message.obj = msg; handler.sendMessage(message);
}
} private Handler handler = new Handler(){
@Override
public void handleMessage(Message msg) { switch (msg.what) {
case 0:
myBrowser.goBack();
break;
case SET_SHOP_ID:
webViewHelper.callJs("setId", 1);
break;
case SHOW_TOAST:
Object obj = msg.obj;
if (obj != null) {
ToastCommom.ToastShow((String) obj);
}
break;
}
}
};
}