android 监听webView滑动距离和标题栏颜色渐变

import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.util.Log;
import android.view.ActionMode;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.AbsoluteLayout;
import android.widget.FrameLayout;
import android.widget.ProgressBar;
import android.widget.TextView;

import com.tencent.smtt.sdk.WebSettings;
import com.tencent.smtt.sdk.WebView;
import com.tencent.smtt.sdk.WebViewClient;
import com.yuanxin.clan.R;
import com.yuanxin.clan.core.app.UserNative;
import com.yuanxin.clan.core.company.utils.MyWebChromeClient;
import com.yuanxin.clan.core.util.FastJsonUtils;
import com.yuanxin.clan.mvp.entity.UserAgentParam;
import com.yuanxin.clan.mvp.utils.CommonString;

import java.util.ArrayList;
import java.util.List;

public class X5WebView extends WebView {
private ProgressBar progressbar;  //进度条
private int progressHeight = 10;  //进度条的高度，默认10px
TextView title;
private ActionMode mActionMode;
private List<String> mActionList = new ArrayList<>();
private WebViewClient client = new WebViewClient() {
/**
* 防止加载网页时调起系统浏览器
*/
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}

// 重写 WebViewClient  的  shouldInterceptRequest （）
// API 21 以下用shouldInterceptRequest(WebView view, String url)
// API 21 以上用shouldInterceptRequest(We
10a72
bView view, WebResourceRequest request)
// 下面会详细说明

// API 21 以下用shouldInterceptRequest(WebView view, String url)
//        @Override
//        public WebResourceResponse shouldInterceptRequest(WebView view, String url) {
//            if (url.contains("jquery.js"))
//       {
//          String localPath = url.replaceFirst("^http.*[tag]\\]", "");
//          try
//          {
//             InputStream is = getContext().getAssets().open(localPath);
//             String mimeType = "text/javascript";
//             if (localPath.endsWith("css"))
//             {
//                mimeType = "text/css";
//             }
//             return new WebResourceResponse(mimeType, "UTF-8", is);
//          }
//          catch (Exception e)
//          {
//             e.printStackTrace();
//          }
//       }
//            return super.shouldInterceptRequest(view, url);
//        }
//
//
//        // API 21 以上用shouldInterceptRequest(WebView view, WebResourceRequest request)
//        @TargetApi(Build.VERSION_CODES.LOLLIPOP)
//        @Override
//        public WebResourceResponse shouldInterceptRequest(WebView view, WebResourceRequest request) {
//            String url = request.getUrl().toString();
//            if (url.contains("[tag]"))
//            {
//                String localPath = url.replaceFirst("^http.*[tag]\\]", "");
//                try
//                {
//                    InputStream is = getContext().getAssets().open(localPath);
//                    String mimeType = "text/javascript";
//                    if (localPath.endsWith("css"))
//                    {
//                        mimeType = "text/css";
//                    }
//                    return new WebResourceResponse(mimeType, "UTF-8", is);
//                }
//                catch (Exception e)
//                {
//                    e.printStackTrace();
//                }
//            }
//            return super.shouldInterceptRequest(view, request);
//        }
};
public OnScrollListener listener;
/**
* This is called in response to an internal scroll in this view (i.e., the
* view scrolled its own contents). This is typically as a result of
* {@link #scrollBy(int, int)} or {@link #scrollTo(int, int)} having been
* called.
*
* @param l Current horizontal scroll origin.
* @param t Current vertical scroll origin.
* @param oldl Previous horizontal scroll origin.
* @param oldt Previous vertical scroll origin.
*/
@Override
protected void onScrollChanged(int l, int t, int oldl, int oldt) {
super.onScrollChanged(l, t, oldl, oldt);

if (listener != null){
if (t - oldt <= 2){
listener.onScrollDown();
}
if(oldt - t >= 2) {
listener.onScrollUp();
}
listener.scrollHeight(t);
}
}
public void setListener(OnScrollListener listener){
this.listener = listener;
}

public interface OnScrollListener{
void onScrollUp();//上滑
void onScrollDown();//下滑
void scrollHeight(int h);
}
//这两个方法会在用户长按选择web文本时，在弹出菜单前被调用。
@Override
public ActionMode startActionMode(ActionMode.Callback callback) {
ActionMode actionMode = startActionMode(callback);
Log.e("hxw", actionMode.toString());
return resolveActionMode(actionMode);
}

@Override
public ActionMode startActionMode(ActionMode.Callback callback, int type) {
ActionMode actionMode = startActionMode(callback, type);
Log.e("hxw", actionMode.toString() + " " + type);
return resolveActionMode(actionMode);
}

//处理item，处理点击
private ActionMode resolveActionMode(ActionMode actionMode) {
if (actionMode != null) {
final Menu menu = actionMode.getMenu();
mActionMode = actionMode;
menu.clear();
Log.e("hxw", mActionList.toString());
for (int i = 0; i < mActionList.size(); i++) {
menu.add(mActionList.get(i));
}
for (int i = 0; i < menu.size(); i++) {
MenuItem menuItem = menu.getItem(i);
menuItem.setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
@Override
public boolean onMenuItemClick(MenuItem item) {
// getSelectedData((String) item.getTitle());
// releaseAction();

return true;
}
});
}
}
mActionMode = actionMode;
return actionMode;
}
//设置弹出action列表

public void setActionList(List<String> actionList) {
mActionList = actionList;
}

@SuppressLint("SetJavaScriptEnabled")
public X5WebView(Context arg0, AttributeSet arg1) {
super(arg0, arg1);
initWebViewSettings(arg0);
this.setWebViewClient(client);
this.setWebChromeClient(new MyWebChromeClient(arg0, progressbar));
// this.setWebChromeClient(chromeClient);
// WebStorage webStorage = WebStorage.getInstance();
this.getView().setClickable(true);
}

public void setProgressbarDrawable(Drawable d) {
progressbar.setProgressDrawable(d);
}

private void initWebViewSettings(Context context) {
//创建进度条
progressbar = new ProgressBar(context, null,
android.R.attr.progressBarStyleHorizontal);
//设置加载进度条的高度
progressbar.setLayoutParams(new AbsoluteLayout.LayoutParams(FrameLayout.LayoutParams.MATCH_PARENT, progressHeight, 0, 0));

Drawable drawable = context.getResources().getDrawable(R.drawable.progressbar_blue);
progressbar.setProgressDrawable(drawable);

//添加进度到WebView
addView(progressbar);

WebSettings webSetting = this.getSettings();
webSetting.setJavaScriptEnabled(true);
webSetting.setJavaScriptCanOpenWindowsAutomatically(true);
webSetting.setAllowFileAccess(true);
webSetting.setLayoutAlgorithm(WebSettings.LayoutAlgorithm.NARROW_COLUMNS);
webSetting.setSupportZoom(true);
webSetting.setBuiltInZoomControls(true);
webSetting.setUseWideViewPort(true);
webSetting.setSupportMultipleWindows(true);
// webSetting.setLoadWithOverviewMode(true);
webSetting.setAppCacheEnabled(false);
// webSetting.setDatabaseEnabled(true);
webSetting.setDomStorageEnabled(true);
webSetting.setGeolocationEnabled(true);
webSetting.setAppCacheMaxSize(Long.MAX_VALUE);
webSetting.setTextSize(WebSettings.TextSize.NORMAL);
// webSetting.setPageCacheCapacity(IX5WebSettings.DEFAULT_CACHE_CAPACITY);
webSetting.setPluginState(WebSettings.PluginState.ON_DEMAND);
// webSetting.setRenderPriority(WebSettings.RenderPriority.HIGH);
webSetting.setCacheMode(WebSettings.LOAD_DEFAULT);
webSetting.setDisplayZoomControls(false);
this.setWebContentsDebuggingEnabled(true);
String ua = webSetting.getUserAgentString();
UserAgentParam up = new UserAgentParam(CommonString.appTag, UserNative.getId(), UserNative.getName(), UserNative.getPhone(), UserNative.getPwd(), UserNative.getEpId());
webSetting.setUserAgent(ua + "&" + FastJsonUtils.toJSONString(up));

webSetting.setLoadsImagesAutomatically(true);
Log.e("hxw", webSetting.getUserAgentString());
// this.getSettingsExtension().setPageCacheCapacity(IX5WebSettings.DEFAULT_CACHE_CAPACITY);//extension
// settings 的设计
}

// @Override
// protected boolean drawChild(Canvas canvas, View child, long drawingTime) {
//    boolean ret = super.drawChild(canvas, child, drawingTime);
//    canvas.save();
//    Paint paint = new Paint();
//    paint.setColor(0x7fff0000);
//    paint.setTextSize(24.f);
//    paint.setAntiAlias(true);
//    if (getX5WebViewExtension() != null) {
//       canvas.drawText(this.getContext().getPackageName() + "-pid:"
//             + android.os.Process.myPid(), 10, 50, paint);
//       canvas.drawText(
//             "X5  Core:" + QbSdk.getTbsVersion(this.getContext()), 10,
//             100, paint);
//    } else {
//       canvas.drawText(this.getContext().getPackageName() + "-pid:"
//             + android.os.Process.myPid(), 10, 50, paint);
//       canvas.drawText("Sys Core", 10, 100, paint);
//    }
//    canvas.drawText(Build.MANUFACTURER, 10, 150, paint);
//    canvas.drawText(Build.MODEL, 10, 200, paint);
//    canvas.restore();
//    return ret;
// }

/*public X5WebView(Context arg0) {
super(arg0);
setBackgroundColor(85621);
}*/
}

mWebview.setListener(new X5WebView.OnScrollListener() {
@Override
public void onScrollUp() {
Logger.e("up");
}

@Override
public void onScrollDown() {
Logger.e("down");
}

@Override
public void scrollHeight(int h) {
if (h > 0) {
headLayout.setBackgroundResource(R.color.epblueyl);//标题栏颜色渐变
}
float f = (h + 0f) / 450;//滑动距离450px
if (f > 1) {
f = 1f;
}
if (f < 0) {
f = 0;
}
//                headLayout.setAlpha(f*1);
headLayout.setBackgroundColor(ColorUtils.changeAlpha(ContextCompat.getColor(YxServiceActivity.this, R.color.epblueyl),(int)(f * 1 * 0xff)));
}
});