WebView相关
2018-09-03
第一次记录文章，有不对的地方，请见谅。
WebView内存泄漏问题
public void destroy() {
if (mWebView !=null) {
mWebView.loadUrl("about:blank");
mWebView.removeAllViews();
releaseConfigCallback();
mWebView.destroy();
mWebView =null;
}
}
private void releaseConfigCallback() {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) {// JELLY_BEAN
try {
Field field = WebView.class.getDeclaredField("mWebViewCore");
field = field.getType().getDeclaredField("mBrowserFrame");
field = field.getType().getDeclaredField("sConfigCallback");
field.setAccessible(true);
field.set(null, null);
}catch (NoSuchFieldException e) {
e.printStackTrace();
}catch (IllegalAccessException e) {
e.printStackTrace();
}
}else if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {// KITKAT
try {
Field sConfigCallback = Class.forName("android.webkit.BrowserFrame").getDeclaredField("sConfigCallback");
if (sConfigCallback !=null) {
sConfigCallback.setAccessible(true);
sConfigCallback.set(null, null);
}
}catch (NoSuchFieldException e) {
e.printStackTrace();
}catch (ClassNotFoundException e) {
e.printStackTrace();
}catch (IllegalAccessException e) {
e.printStackTrace();
}
}
}
WebView初始化准备
public ReveeWeb prepare(Context context) {
mWebView.setVerticalScrollBarEnabled(false);
mWebView.setAlwaysDrawnWithCacheEnabled(true);
mWebView.setAnimationCacheEnabled(true);
mWebView.setDrawingCacheBackgroundColor(Color.WHITE);
mWebView.setDrawingCacheEnabled(true);
mWebView.setWillNotCacheDrawing(false);
mWebView.setSaveEnabled(true);
mWebView.setFocusable(true);
mWebView.setFocusableInTouchMode(true);
WebSettings settings = mWebView.getSettings();
settings.setTextZoom(100);
settings.setJavaScriptEnabled(true);
settings.setDomStorageEnabled(true);
settings.setSupportZoom(true);
settings.setBuiltInZoomControls(true);
settings.setDisplayZoomControls(false);
settings.setLayoutAlgorithm(WebSettings.LayoutAlgorithm.NARROW_COLUMNS);
settings.setUseWideViewPort(true);
settings.setLoadWithOverviewMode(true);
settings.setPluginState(WebSettings.PluginState.ON_DEMAND);
// settings.setMediaPlaybackRequiresUserGesture(false);
// 图片延迟加载，加快web的加载速度
settings.setLoadsImagesAutomatically(Build.VERSION.SDK_INT >=19);
// 根据网络状态改变缓存策略
if (isNetworkConnected(context)) {
settings.setCacheMode(WebSettings.LOAD_DEFAULT);
}else {
settings.setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);
}
settings.setAppCacheEnabled(true);
settings.setAppCachePath(context.getCacheDir().toString());
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
settings.setMixedContentMode(WebSettings.MIXED_CONTENT_ALWAYS_ALLOW);
}
mWebView.setWebViewClient(new ReveeWebViewClient());
return this;
}
Android和JS的调用
webView.loadUrl("javascript:(function () {\n" +
" var btn = document.getElementsByClassName('x-video-button')[0];\n" +
" if (btn != null) {\n" +
" btn.click();\n" +
" }\n" +
" var video = document.getElementsByTagName('video')[0];\n" +
" video.volume = 0;\n" +
" video.addEventListener('timeupdate', function () {\n" +
" window.android.onTimeUpdate(this.currentTime);\n" +
" });\n" +
" video.addEventListener('ended', function () {\n" +
" window.android.onEnd();\n" +
" });\n" +
"\n" +
" video.play();\n" +
"})()");
/**
* js回调接口
*/
private class WebViewCallback {
private double currentTime;
/**
* 监听video标签的timeupdate，如果播放时长超过了15秒，证明播放两个广告完成了，已经进入正片，表示播放成功
*
* @param time
*/
@JavascriptInterface
public void onTimeUpdate(double time) {
currentTime = time;
Log.e("guoxing", "time:" + time);
// 时间大于0证明已经开始播放广告了，视频播放任务调起成功
if (time >0 && !playSuccess) {
playSuccess =true;
Log.e("guoxing", "playSuccess========================");
if (listener !=null) {
listener.onPlaySuccess();
}
}
// 时间大于指定的时长，说明任务完成了，但是视频可能还处于播放状态
if (time >mDuration && !onDuration) {
onDuration =true;
isPlay =true;
Log.e("guoxing", "onDuration======================");
if (listener !=null) {
listener.onDuration();
}
new Handler(Looper.getMainLooper()).post(new Runnable() {
@Override
public void run() {
release();
}
});
}
}
/**
* 监听video标签的ended回调，表示视频播放完成
*/
@JavascriptInterface
public void onEnd() {
Log.e("guoxing", "onEnd=========================");
if (currentTime >mDuration &&listener !=null) {
listener.onEnd();
}
}
}
拿到Cookie
CookieManager cookieManager = CookieManager.getInstance();
String CookieStr = cookieManager.getCookie(url);
以后再补充。。
