封装webview
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最近项目使用的webview比较多，记录一下
public class StrengthenWebView extends RelativeLayout { private String htmlPath = ""; //网页存放目录 private String jsonData = ""; //json数据字符串 private CallBackWebView contentWebView; private Context context; public boolean isViewLoaded = false; private boolean isHtmlLoaded = false; private int finishTime = 0; private WebViewCallBack callBack; private OnHeightChangeListener onHeightChangeListener; public StrengthenWebView(Context context, AttributeSet attrs) { super(context, attrs); TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.StrengthenWebView); htmlPath = typedArray.getString(R.styleable.StrengthenWebView_htmlPath); initView(context); } public StrengthenWebView(Context context, String htmlPath) { super(context); this.htmlPath = htmlPath; initView(context); } protected View initView(Context context) { this.context = context; View rootView = View.inflate(context,R.layout.view_strength_web_view, this); contentWebView = (CallBackWebView) rootView.findViewById(R.id.wv_strengthen);// WebViewUtils.setWebView(contentWebView); contentWebView.setWebViewClient(new WebViewClient(){ @Override public void onPageFinished(WebView view, String url) { super.onPageFinished(view, url); isHtmlLoaded = true; if (callBack!=null){ callBack.onPageFinish(); } finishTime++;// Logger.e("StrengthenWebView #########--------------########## onPageFinished "+isHtmlLoaded);// if (finishTime==1){// isHtmlLoaded = true;// } } @Override public boolean shouldOverrideUrlLoading(WebView view, String url) { view.loadUrl(url); return true; } @Override public void onReceivedError(WebView view, WebResourceRequest request, WebResourceError error) { super.onReceivedError(view, request, error); Logger.e("StrengthenWebView -----Error--"+request.toString()+" "+error.toString()); } }); contentWebView.loadUrl(htmlPath); JsonContacts jsonContacts = new JsonContacts(); contentWebView.addJavascriptInterface(jsonContacts, "jsonContacts"); contentWebView.addJavascriptInterface(new SetHeight(), "setHeight"); return rootView; } public void loadJson(){ int index = htmlPath.lastIndexOf("/"); String path =htmlPath.substring(index, htmlPath.length()); Logger.e("Strengthen Webview ------------ loadJson()"+path); contentWebView.evaluateJavascript("loadJson()", new ValueCallback<String>() { @Override public void onReceiveValue(String value) { if (value!=null){// isViewLoaded = true; JsonReader reader = new JsonReader(new StringReader(value)); reader.setLenient(true); try { if(reader.peek() != JsonToken.NULL) { if(reader.peek() == JsonToken.STRING) { String msg = reader.nextString(); if(msg != null) {// Toast.makeText(context.getApplicationContext(),// msg, Toast.LENGTH_LONG).show(); Logger.e("onReceiveValue -------- "+value+" "+msg); } } } } catch (IOException e) { Log.e("TAG", "MainActivity: IOException", e); } finally { try { reader.close(); } catch (IOException e) { // NOOP } } } } }); } public void setJsonData(String jsonData) { this.jsonData = jsonData; } public String getJsonData() { return jsonData; } public String getHtmlPath() { return htmlPath; } public void setHtmlPath(String htmlPath) { //htmlPath基本格式 "file:///android_asset/show.html" this.htmlPath = htmlPath; contentWebView.loadUrl(htmlPath); } public WebView getContentWebView() { return contentWebView; } public void refresh(){ contentWebView.reload(); } class SetHeight { private int realHeight; @JavascriptInterface public void setViewHeight(final String height) { Logger.e("Height is ------------ "+height+" "+contentWebView.getLayoutParams().height);// final int realHeight = DensityUtil.px2dip(getContext(), Float.parseFloat(height)); realHeight = Integer.parseInt(height); if (onHeightChangeListener!=null){ onHeightChangeListener.onViewHeightChanged(realHeight); } Activity activity = (Activity) context; activity.runOnUiThread(new Runnable() { @Override public void run() { ViewGroup.LayoutParams layoutParams = contentWebView.getLayoutParams(); layoutParams.height = realHeight; contentWebView.setLayoutParams(layoutParams); } }); } public int getRealHeight() { return realHeight; } public void setRealHeight(int realHeight) { this.realHeight = realHeight; } } class JsonContacts implements NativeAndJsContacts { @Override @JavascriptInterface public String getJsonData() {// Logger.e("StrengthenWebView() getJsonData ---------"+jsonData); if (!jsonData.equals("")){ String json = jsonData; return json; }else { return null; } } @JavascriptInterface public String getUrl(){ return CommonParams.BASE_URL; } @JavascriptInterface public String getToken(){ return MyApplication.userToken; } @JavascriptInterface public String getLanguage(){ return MyApplication.language; } } public boolean isHtmlLoaded() {// isHtmlLoaded = contentWebView.isLoadSuccess(); return isHtmlLoaded; } public interface WebViewCallBack{ void onPageFinish(); } public WebViewCallBack getCallBack() { return callBack; } public void setCallBack(WebViewCallBack callBack) { this.callBack = callBack; } public interface OnHeightChangeListener { //方法a public void onViewHeightChanged(int height); } //方法b,以定义的接口作为参数 public void setOnHeightChangeListener(OnHeightChangeListener onHeightChangeListener) { this.onHeightChangeListener = onHeightChangeListener; }}自定义属性<declare-styleable name="StrengthenWebView"> <attr name="htmlPath" format="string" /> </declare-styleable>
布局文件
<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent"> <com.lnsoft.fcis.android.CallBackWebView android:id="@+id/wv_strengthen" android:layout_width="match_parent" android:layout_height="match_parent"/></RelativeLayout>
其中CallBackWebViewpublic class CallBackWebView extends WebView { private boolean isLoadSuccess = false; private LoadedCallBack callBack; public CallBackWebView(Context context) { super(context); } public CallBackWebView(Context context, AttributeSet attrs) { super(context, attrs); } public CallBackWebView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); } public CallBackWebView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { super(context, attrs, defStyleAttr, defStyleRes); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); isLoadSuccess = true; if (callBack!=null){ callBack.onLoaded(); }// Logger.e("CallBackWebView ------------- isLoadSuccess="+isLoadSuccess); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { invalidate(); super.onMeasure(widthMeasureSpec, heightMeasureSpec); } public boolean isLoadSuccess() { return isLoadSuccess; } interface LoadedCallBack { public void onLoaded(); } public void setCallBack(LoadedCallBack callBack) { this.callBack = callBack; }}
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