我正在尝试在我的网页浏览器中实现进度条，但它没有显示任何进展我收到此警告“类型MainActivity.MyWebViewClient永远不会在本地使用”行
私有类MyWebViewClient扩展了WebChromeClient {
CODE
package com.abc.browser;
import android.app.Activity;
import android.app.DownloadManager;
import android.app.DownloadManager.Request;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.view.Gravity;
import android.view.KeyEvent;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.DownloadListener;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.EditText;
import android.widget.FrameLayout;
import android.widget.LinearLayout;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.TextView.OnEditorActionListener;
public class MainActivity extends Activity {
private WebView mWebView;
private EditText urlEditText;
private ProgressBar progress;
// FULL-SCREEN VIDEO-1
private LinearLayout mContentView;
private FrameLayout mCustomViewContainer;
private View mCustomView;
private WebChromeClient.CustomViewCallback mCustomViewCallback;
FrameLayout.LayoutParams COVER_SCREEN_GRAVITY_CENTER = new FrameLayout.LayoutParams(
ViewGroup.LayoutParams.WRAP_CONTENT,
ViewGroup.LayoutParams.WRAP_CONTENT, Gravity.CENTER);
private WebChromeClient mWebChromeClient;
// FULL-SCREEN VIDEO-1
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
findViewById(R.id.menu2).setVisibility(View.GONE);
findViewById(R.id.set_1_b).setVisibility(View.GONE);
findViewById(R.id.set_2_b).setVisibility(View.GONE);
findViewById(R.id.reload_btn).setVisibility(View.GONE);
findViewById(R.id.menu3).setVisibility(View.GONE);
findViewById(R.id.menu1).setVisibility(View.GONE);
// FULL-SCREEN VIDEO-2
mContentView = (LinearLayout) findViewById(R.id.linearlayout);
mWebView = (WebView) findViewById(R.id.webView);
mCustomViewContainer = (FrameLayout) findViewById(R.id.fullscreen_custom_content);
mWebChromeClient = new WebChromeClient() {
@Override
public void onShowCustomView(View view,
WebChromeClient.CustomViewCallback callback) {
// if a view already exists then immediately terminate the new
// one
if (mCustomView != null) {
callback.onCustomViewHidden();
return;
}
// Add the custom view to its container.
mCustomViewContainer.addView(view, COVER_SCREEN_GRAVITY_CENTER);
mCustomView = view;
mCustomViewCallback = callback;
// hide main browser view
mContentView.setVisibility(View.GONE);
// Finally show the custom view container.
mCustomViewContainer.setVisibility(View.VISIBLE);
mCustomViewContainer.bringToFront();
}
@Override
public void onHideCustomView() {
if (mCustomView == null)
return;
// Hide the custom view.
mCustomView.setVisibility(View.GONE);
// Remove the custom view from its container.
mCustomViewContainer.removeView(mCustomView);
mCustomView = null;
mCustomViewContainer.setVisibility(View.GONE);
mCustomViewCallback.onCustomViewHidden();
// Show the content view.
mContentView.setVisibility(View.VISIBLE);
}
};
// FULL-SCREEN VIDEO-2
WebSettings webSettings = mWebView.getSettings();
webSettings.setPluginState(WebSettings.PluginState.ON);
webSettings.setJavaScriptEnabled(true);
webSettings.setUseWideViewPort(true);
webSettings.setLoadWithOverviewMode(true);
mWebView.loadUrl("http://www.google.com");
mWebView.setWebViewClient(new HelloWebViewClient());
// Download manager
mWebView.setDownloadListener(new DownloadListener() {
public void onDownloadStart(String url, String userAgent,
String contentDisposition, String mimetype,
long contentLength) {
Request request = new Request(Uri.parse(url));
request.allowScanningByMediaScanner();
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
request.setDestinationInExternalPublicDir(
Environment.DIRECTORY_DOWNLOADS, "download");
DownloadManager dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
dm.enqueue(request);
}
});
// **//
// URL BAR AND PROGRESS BAR
progress = (ProgressBar) findViewById(R.id.progressBar);
progress.setMax(100);
urlEditText = (EditText) findViewById(R.id.urlField);
// Use Done/search button in keyboard as go button
urlEditText.setOnEditorActionListener(new OnEditorActionListener() {
public boolean onEditorAction(TextView arg0, int arg1, KeyEvent arg2) {
// Toast.makeText(getApplicationContext(), "some key pressed",
// Toast.LENGTH_LONG).show();
String url = urlEditText.getText().toString();
if (url.endsWith(".ac") || url.endsWith(".ac.uk")
|| url.endsWith(".ad") || url.endsWith(".ae")
|| url.endsWith(".aero") || url.endsWith(".af")
|| url.endsWith(".ag") || url.endsWith(".ai")
|| url.endsWith(".al") || url.endsWith(".am")
|| url.endsWith(".an") || url.endsWith(".ao")
|| url.endsWith(".aq") || url.endsWith(".ar")
|| url.endsWith(".arpa") || url.endsWith(".as")
|| url.endsWith(".asia") || url.endsWith(".at")
|| url.endsWith(".au") || url.endsWith(".aw")
|| url.endsWith(".ax") || url.endsWith(".az")
|| url.endsWith(".ba") || url.endsWith(".bb")
|| url.endsWith(".bd") || url.endsWith(".be")
|| url.endsWith(".bf") || url.endsWith(".bg")
|| url.endsWith(".bh") || url.endsWith(".bi")
|| url.endsWith(".biz") || url.endsWith(".bj")
|| url.endsWith(".bm") || url.endsWith(".bn")
|| url.endsWith(".bo") || url.endsWith(".br")
|| url.endsWith(".bs") || url.endsWith(".bt")
|| url.endsWith(".bv") || url.endsWith(".bw")
|| url.endsWith(".by") || url.endsWith(".bz")
|| url.endsWith(".ca") || url.endsWith(".cat")
|| url.endsWith(".cc") || url.endsWith(".cd")
|| url.endsWith(".cf") || url.endsWith(".cg")
|| url.endsWith(".ch") || url.endsWith(".ci")
|| url.endsWith(".ck") || url.endsWith(".cl")
|| url.endsWith(".cm") || url.endsWith(".cn")
|| url.endsWith(".co") || url.endsWith(".co.uk")
|| url.endsWith(".com") || url.endsWith(".coop")
|| url.endsWith(".cr") || url.endsWith(".cs")
|| url.endsWith(".cu") || url.endsWith(".cv")
|| url.endsWith(".cx") || url.endsWith(".cy")
|| url.endsWith(".cz") || url.endsWith(".dd")
|| url.endsWith(".de") || url.endsWith(".dj")
|| url.endsWith(".dk") || url.endsWith(".dm")
|| url.endsWith(".do") || url.endsWith(".dz")
|| url.endsWith(".ec") || url.endsWith(".edu")
|| url.endsWith(".ee") || url.endsWith(".eg")
|| url.endsWith(".eh") || url.endsWith(".er")
|| url.endsWith(".es") || url.endsWith(".et")
|| url.endsWith(".eu") || url.endsWith(".fi")
|| url.endsWith(".firm") || url.endsWith(".fj")
|| url.endsWith(".fk") || url.endsWith(".fm")
|| url.endsWith(".fo") || url.endsWith(".fr")
|| url.endsWith(".fx.ga") || url.endsWith(".gb")
|| url.endsWith(".gd") || url.endsWith(".ge")
|| url.endsWith(".gf") || url.endsWith(".gh")
|| url.endsWith(".gi") || url.endsWith(".gl")
|| url.endsWith(".gm") || url.endsWith(".gn")
|| url.endsWith(".gov") || url.endsWith(".gov.uk")
|| url.endsWith(".gp") || url.endsWith(".gq")
|| url.endsWith(".gr") || url.endsWith(".gs")
|| url.endsWith(".gt") || url.endsWith(".gu")
|| url.endsWith(".gw") || url.endsWith(".gy")
|| url.endsWith(".hk") || url.endsWith(".hm")
|| url.endsWith(".hn") || url.endsWith(".hr")
|| url.endsWith(".ht") || url.endsWith(".hu")
|| url.endsWith(".id") || url.endsWith(".ie")
|| url.endsWith(".il") || url.endsWith(".im")
|| url.endsWith(".in") || url.endsWith(".info")
|| url.endsWith(".int") || url.endsWith(".io")
|| url.endsWith(".iq") || url.endsWith(".ir.is")
|| url.endsWith(".it") || url.endsWith(".je")
|| url.endsWith(".jm") || url.endsWith(".jo")
|| url.endsWith(".jobs") || url.endsWith(".jp")
|| url.endsWith(".ke") || url.endsWith(".kg")
|| url.endsWith(".kh") || url.endsWith(".ki")
|| url.endsWith(".km") || url.endsWith(".kn")
|| url.endsWith(".kp") || url.endsWith(".kr")
|| url.endsWith(".kw") || url.endsWith(".ky")
|| url.endsWith(".kz") || url.endsWith(".la")
|| url.endsWith(".lb") || url.endsWith(".lc")
|| url.endsWith(".li") || url.endsWith(".lk")
|| url.endsWith(".lr") || url.endsWith(".ls")
|| url.endsWith(".lt") || url.endsWith(".ltd.uk")
|| url.endsWith(".lu") || url.endsWith(".lv")
|| url.endsWith(".ly") || url.endsWith(".ma")
|| url.endsWith(".mc") || url.endsWith(".md")
|| url.endsWith(".me") || url.endsWith(".me.uk")
|| url.endsWith(".mg") || url.endsWith(".mh")
|| url.endsWith(".mil") || url.endsWith(".mk")
|| url.endsWith(".ml") || url.endsWith(".mm")
|| url.endsWith(".mn") || url.endsWith(".mo")
|| url.endsWith(".mobi") || url.endsWith(".mod.uk")
|| url.endsWith(".mp") || url.endsWith(".mq")
|| url.endsWith(".mr") || url.endsWith(".ms")
|| url.endsWith(".mt") || url.endsWith(".mu")
|| url.endsWith(".museum") || url.endsWith(".mv")
|| url.endsWith(".mw") || url.endsWith(".mx")
|| url.endsWith(".my") || url.endsWith(".mz.na")
|| url.endsWith(".name") || url.endsWith(".nato")
|| url.endsWith(".nc") || url.endsWith(".ne")
|| url.endsWith(".net") || url.endsWith(".net.uk")
|| url.endsWith(".nf") || url.endsWith(".ng")
|| url.endsWith(".nhs.uk") || url.endsWith(".ni")
|| url.endsWith(".nl") || url.endsWith(".no")
|| url.endsWith(".nom") || url.endsWith(".np")
|| url.endsWith(".nr") || url.endsWith(".nt")
|| url.endsWith(".nu") || url.endsWith(".nz")
|| url.endsWith(".om") || url.endsWith(".org")
|| url.endsWith(".org.uk") || url.endsWith(".pa")
|| url.endsWith(".pe") || url.endsWith(".pf")
|| url.endsWith(".pg") || url.endsWith(".ph")
|| url.endsWith(".pk") || url.endsWith(".pl")
|| url.endsWith(".plc.uk") || url.endsWith(".pm")
|| url.endsWith(".pn") || url.endsWith(".post")
|| url.endsWith(".pr") || url.endsWith(".pro")
|| url.endsWith(".ps") || url.endsWith(".pt")
|| url.endsWith(".pw") || url.endsWith(".py")
|| url.endsWith(".qa") || url.endsWith(".re")
|| url.endsWith(".ro") || url.endsWith(".ru")
|| url.endsWith(".rw") || url.endsWith(".sa")
|| url.endsWith(".sb") || url.endsWith(".sc")
|| url.endsWith(".sch.uk") || url.endsWith(".sd")
|| url.endsWith(".se") || url.endsWith(".sg")
|| url.endsWith(".sh") || url.endsWith(".si")
|| url.endsWith(".sj") || url.endsWith(".sk")
|| url.endsWith(".sl") || url.endsWith(".sm")
|| url.endsWith(".sn") || url.endsWith(".so")
|| url.endsWith(".sr") || url.endsWith(".store")
|| url.endsWith(".su") || url.endsWith(".sv")
|| url.endsWith(".sy") || url.endsWith(".sz")
|| url.endsWith(".tc") || url.endsWith(".td")
|| url.endsWith(".tel") || url.endsWith(".tf")
|| url.endsWith(".tg") || url.endsWith(".th")
|| url.endsWith(".tj") || url.endsWith(".tk")
|| url.endsWith(".tl") || url.endsWith(".tm")
|| url.endsWith(".tn") || url.endsWith(".to")
|| url.endsWith(".tp") || url.endsWith(".tr")
|| url.endsWith(".travel") || url.endsWith(".tt")
|| url.endsWith(".tv") || url.endsWith(".tw")
|| url.endsWith(".tz") || url.endsWith(".ua")
|| url.endsWith(".ug") || url.endsWith(".uk")
|| url.endsWith(".um") || url.endsWith(".us")
|| url.endsWith(".uy") || url.endsWith(".va")
|| url.endsWith(".vc") || url.endsWith(".ve")
|| url.endsWith(".vg") || url.endsWith(".vi")
|| url.endsWith(".vn") || url.endsWith(".vu")
|| url.endsWith(".web") || url.endsWith(".wf")
|| url.endsWith(".ws") || url.endsWith(".xxx")
|| url.endsWith(".ye") || url.endsWith(".yt")
|| url.endsWith(".yu") || url.endsWith(".za")
|| url.endsWith(".zm") || url.endsWith(".zr")
|| url.endsWith(".zw")) {
if (!url.startsWith("http://")
&& !url.startsWith("https://")) {
url = "http://" + url;
}
} else
url = "https://www.google.com/search?q="
+ url.replace(" ", "+");// Prefix (replace spaces
// with a '+' sign)
mWebView.loadUrl(url);
if (validateUrl(url)) {
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.loadUrl(url);
MainActivity.this.progress.setProgress(10);
}
return false;
}
private boolean validateUrl(String url) {
return true;
}
});
// **//
}
private class MyWebViewClient extends WebChromeClient {
@Override
public void onProgressChanged(WebView view, int newProgress) {
MainActivity.this.setValue(newProgress);
super.onProgressChanged(view, newProgress);
}
}
public void setValue(int progress) {
this.progress.setProgress(progress);
}
private class HelloWebViewClient extends WebViewClient {
@Override
public boolean shouldOverrideUrlLoading(WebView webview, String url) {
webview.setWebChromeClient(mWebChromeClient);
webview.loadUrl(url);
return true;
}
}
// FULL-SCREEN VIDEO-3
@Override
protected void onStop() {// plays video outside frame on back button and
// prevents from going back
super.onStop();
if (mCustomView != null) {
if (mCustomViewCallback != null)
mCustomViewCallback.onCustomViewHidden();
mCustomView = null;
}
}
@Override
public void onBackPressed() {// hide custom view (in which the video plays)
// on back button
super.onBackPressed();
if (mCustomView != null) {
mWebChromeClient.onHideCustomView();
} else {
finish();
}
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {// prevents the
// custom view from
// running in
// background when
// app is closed
if ((keyCode == KeyEvent.KEYCODE_BACK) && mWebView.canGoBack()) {
mWebView.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
// FULL-SCREEN VIDEO-3
}
}