自定义了一个WebView和WebChromeClient,需要在自定义的WebChromeClient内重写onProgressChanged方法,把使用自定义View的类界面中的ProgressBar传递进去,这样该怎么整呢?下面是三个类:
1.自定义WebChromeClient:

public class ZpWebChromeClient extends WebChromeClient {

    private OpenFileChooserCallBack mOpenFileChooserCallBack;
    
    public void openFileChooser(ValueCallback<Uri> uploadMsg) {
        openFileChooser(uploadMsg, "");
    }
    
    public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType) {
        if (mOpenFileChooserCallBack != null) {
            mOpenFileChooserCallBack.openFileChooserCallBack(uploadMsg, acceptType);
        }
    }
    
    public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture) {
        openFileChooser(uploadMsg, acceptType);
    }
    
    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
    public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, FileChooserParams fileChooserParams) {
        if (mOpenFileChooserCallBack != null) {
            mOpenFileChooserCallBack.showFileChooserCallBack(filePathCallback, fileChooserParams);
        }
        return true;
    }

    public void setOpenFileChooserCallBack(OpenFileChooserCallBack callBack) {
        mOpenFileChooserCallBack = callBack;
    }

    public interface OpenFileChooserCallBack {

        void openFileChooserCallBack(ValueCallback<Uri> uploadMsg, String acceptType);

        void showFileChooserCallBack(ValueCallback<Uri[]> filePathCallback, FileChooserParams fileChooserParams);
    }

    @Override
    public void onProgressChanged(WebView view, int newProgress) {
        super.onProgressChanged(view, newProgress);
//        if (newProgress == 100) {
//            progressBar.setVisibility(View.GONE);//todo:需要把progressbar传进来,加载完网页进度条消失
//        } else {
//            progressBar.setVisibility(View.VISIBLE);//开始加载网页时显示进度条
//            progressBar.setProgress(newProgress);//设置进度值
//        }
    }
}

2.自定义WebView:

public class ZpWebView extends WebView {

    private ZpWebChromeClient webChromeClient;

    public ZpWebView(Context context) {
        super(context);
        initWebView();
    }

    public ZpWebView(Context context, AttributeSet attrs) {
        super(context, attrs);
        initWebView();
    }

    public ZpWebView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        initWebView();
    }

    private void initWebView() {
        webChromeClient = new ZpWebChromeClient();
        setWebChromeClient(webChromeClient);
        WebSettings webviewSettings = getSettings();
        // 不支持缩放
        webviewSettings.setSupportZoom(false);
        // 自适应屏幕大小
        webviewSettings.setUseWideViewPort(true);
        webviewSettings.setLoadWithOverviewMode(true);
        String cacheDirPath = getContext().getFilesDir().getAbsolutePath() + "cache/";
        webviewSettings.setAppCachePath(cacheDirPath);
        webviewSettings.setAppCacheEnabled(true);

        webviewSettings.setDomStorageEnabled(true);
        webviewSettings.setAllowFileAccess(true);
        webviewSettings.setAppCacheMaxSize(1024 * 1024 * 8);
        webviewSettings.setJavaScriptEnabled(true);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            webviewSettings.setMixedContentMode(WebSettings.MIXED_CONTENT_ALWAYS_ALLOW);
        }
    }

    public void setOpenFileChooserCallBack(ZpWebChromeClient.OpenFileChooserCallBack callBack) {
        webChromeClient.setOpenFileChooserCallBack(callBack);
    }
}

3.使用到的类部分代码:

public class WebViewActivity extends BaseActivity {

    @BindView(R.id.wv_zp)
    ZpWebView mWebView;
    @BindView(R.id.pb_web_view)
    ProgressBar progressBar;    //需要传递的ProgressBar
    @BindView(R.id.fl_root_web_view)
    FrameLayout mRootView;

    private static final int REQUEST_FILE_CAMERA_CODE = 102;
    private final static int VIDEO_REQUEST = 120;
    // 默认图片压缩大小（单位：K）
    public static final int IMAGE_COMPRESS_SIZE_DEFAULT = 400;
    // 压缩图片最小高度
    public static final int COMPRESS_MIN_HEIGHT = 900;
    // 压缩图片最小宽度
    public static final int COMPRESS_MIN_WIDTH = 675;

    private ValueCallback<Uri> mUploadMsg;
    private ValueCallback<Uri[]> mUploadMsgs;
    // 相机拍照返回的图片文件
    private File mFileFromCamera;
    private static final String TAG = "WebViewActivity";

    public static void open(Context context, String url, String title) {
        Intent intent = new Intent(context, WebViewActivity.class);
        intent.putExtra("url", url);
        intent.putExtra("title", title);
        context.startActivity(intent);
    }

    @Override
    protected int getLayout() {
        return R.layout.activity_web_view;
    }

    @Override
    protected void initView(Bundle savedInstanceState) {
        String title = getIntent().getStringExtra("title");
        mTvTitle.setText(title);
    }
....省略了一片代码