android 嵌入服务端页面二 之WebView与页面互调
16lz
2021-01-23
WebView引入页面及回调处理
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="@color/white" android:orientation="vertical" > <!-- 头部和尾部为重用和统一风格 --> <!-- 头部 --><include layout="@layout/jx_two_page_header"/><WebView android:id="@+id/wvTicketOne" android:layout_width="fill_parent" android:layout_height="fill_parent" /> <!-- 尾部 --><include android:id="@+id/footer" layout="@layout/jx_two_footer"/></LinearLayout>
在Activity的onCreate方法中加载页面
@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);requestWindowFeature(Window.FEATURE_NO_TITLE);setContentView(R.layout.ticket_one);/** * 在android 2.3以后进行了较为严格的限制 * 该类可以用来帮助开发者改进他们编写的应用。 * 并且提供了各种的策略， * 这些策略能随时检查和报告开发者开发应用中存在的问题 */StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder().detectDiskReads().detectDiskWrites().detectNetwork() .penaltyLog().build());StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder().detectLeakedSqlLiteObjects().penaltyLog().penaltyDeath().build());Intent fromInent = getIntent();ticketId = fromInent.getStringExtra("ticketId");//是否管理员String isManage = mPreferences.getString(Constants.USER_IS_MANAGE, String.valueOf(false));//找到WebView控件wvTicketOne = (WebView) findViewById(R.id.wvTicketOne);//设置为可访问页面JS，在Activity和页面直接互调时使用wvTicketOne.getSettings().setJavaScriptEnabled(true);wvTicketOne.setWebViewClient(new WebViewClient());//在onCreate 方法中调用WebView的loadUrl方法加载页面内容wvTicketOne.loadUrl(Constants.URL_TICKET_ONE + ticketId+"&isManage="+isManage);//添加页面可访问的JS接口wvTicketOne.addJavascriptInterface(new JavaScriptInterface(), "android");// Activity间跳转：转到踏勘单TextView takandan = (TextView) findViewById(R.id.tanKanDan);takandan.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {Intent intent = new Intent(TicketOneActivity.this,TicketTanKanDan.class);intent.putExtra("ticketId", ticketId);startActivity(intent);}});//返回按钮：这里做了最简单的处理，直接把当前Activity给关掉，//程序自动返回到上一个Activity（前提是上一个Activity没有销毁）ImageButton btnBack = (ImageButton) findViewById(R.id.cursor_back);btnBack.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {finish();}});//隐藏(后退、1/1、前进、刷新)按钮ImageButton cursor_left = (ImageButton) findViewById(R.id.cursor_left);cursor_left.setVisibility(View.INVISIBLE);ImageButton cursor_right = (ImageButton) findViewById(R.id.cursor_right);cursor_right.setVisibility(View.INVISIBLE);ImageButton cursor_refresh = (ImageButton) findViewById(R.id.cursor_refresh);cursor_refresh.setVisibility(View.INVISIBLE);TextView tv_infoTotal=(TextView)findViewById(R.id.infoTotal);tv_infoTotal.setVisibility(View.INVISIBLE);TextView tv_infoView=(TextView)findViewById(R.id.infoView);tv_infoView.setVisibility(View.INVISIBLE);TextView tv_infoNum=(TextView)findViewById(R.id.infoNum);tv_infoNum.setVisibility(View.INVISIBLE);}
在Activity中创建一个页面可访问的JavaScript接口，供页面调用
private class JavaScriptInterface {private MediaPlayer mediaPlayer;public JavaScriptInterface(){mediaPlayer = new MediaPlayer();}/** * 播放 * @param url 播放文件路径 */public void playMusic(String url){if(mediaPlayer.isPlaying()){mediaPlayer.reset();}try{mediaPlayer.setDataSource(url);mediaPlayer.prepare();mediaPlayer.start();}catch (Exception e) {e.printStackTrace();}}/** * 暂停 */public void stopMusic(){if(mediaPlayer.isPlaying()){mediaPlayer.stop();}}/** * GPS显示 * @param gps */public void showGps(String gps){Intent i = new Intent(TicketOneActivity.this, MapActivity.class);i.putExtra("gps", gps);startActivity(i);}/** * 提示信息 * @param msg */public void showMsg(String msg){if(CommonUtils.validateStr(msg)){Toast.makeText(TicketOneActivity.this, msg, Toast.LENGTH_SHORT).show();}if(CommonUtils.matchString(msg, "提交成功")){finish();}}}
上面的showMsg方法在页面被调用
//页面调用Activity中的JavaScriptInterface方法 function Msg(msg){ if (window.android){ window.android.showMsg(msg); }else{alert(msg); } }----------------------------------------------
在Activity中，也可以将处理的结果返回给页面。以下是一个在任务监听中将结果返回给页面JS的例子。
/** * 签名任务监听 * * @author lihua */private TaskListener signTicketTaskListener = new TaskAdapter() {@Overridepublic void onPostExecute(GenericTask task, String result) {//处理完成删除本地文件FileHelper.delFiles(REC_DIR);JSONObject signInfo = (JSONObject) getApi().getBackResult(result,getApplicationContext());String data = "";String signdate = "";try {data = signInfo.getString("result");signdate = signInfo.getString("signdate");} catch (JSONException e) {e.printStackTrace();}String [] signArray = CommonUtils.splitByTag(data, "$");String words = "",sign ="",gps="",voice="",gid = "",gdt="";//add editif(signArray!=null&&signArray.length>0)for (String s : signArray) {if(s!=null&&s.startsWith(Constants.START_TAG_WORD))words = s.replace(Constants.START_TAG_WORD, "");if(s!=null&&s.startsWith(Constants.START_TAG_SIGN))sign = s.replace(Constants.START_TAG_SIGN, "");if(s!=null&&s.startsWith(Constants.START_TAG_GPS))gps = s.replace(Constants.START_TAG_GPS, "");}String cbstr ="";//页面显示设置,调用页面名称为cbTicketSign的js函数cbstr= "javascript:cbTicketSign('"+words+"','"+Constants.SERVER_FILE_CONTENT_TICKET + sign+"','"+gps+"','"+signdate+"'"+")";System.out.println("cbstr:"+cbstr);wvTicketOne.loadUrl(cbstr);//关闭提示对话框mDialog.dismiss();}@Overridepublic String getName() {return "Login";}};页面JS针对Activity的回调函数和JS的普通函数没有多大区别，以下是上面Activity中调用的JS函数。
//工作票签名回调 function cbTicketSign(sAttr, words, sign, gps ,voice , date){if(sAttr=="workGroupSign"){$('#workGroupSignLbl').html(words);$('#workGroupSignLbl').hide();$('#workGroupSignImg').show();$("#workGroupSignImg").attr("src","${root }"+sign);$("#workGroupSignGps").attr("src","${root}/images/ticket/gps.png");$("#workGroupSignGps").bind("click",function(){ showGps(gps); }); } }
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