webview 支持视频全屏播放

webview 支持视频全屏播放

遗留功能：未能自动识别视频横屏或竖屏全屏播放，默认均为竖屏全屏播放，后续继续优化

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   import android.annotation.SuppressLint;
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   import android.app.Activity;
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   import android.app.DownloadManager;
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   import android.content.Context;
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   import android.content.pm.ActivityInfo;
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   import android.net.Uri;
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   import android.os.Build;
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    import android.os.Environment;
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    import android.support.annotation.NonNull;
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    import android.support.annotation.Nullable;
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    import android.util.AttributeSet;
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    import android.view.KeyEvent;
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    import android.view.MotionEvent;
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    import android.view.View;
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    import android.view.ViewGroup;
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    import android.view.WindowManager;
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    import android.webkit.DownloadListener;
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    import android.webkit.WebChromeClient;
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    import android.webkit.WebSettings;
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    import android.webkit.WebView;
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    import android.widget.FrameLayout;
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    import android.widget.LinearLayout;
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    import android.widget.ProgressBar;
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    /**
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    *webview支持视频全屏播放 二次封装
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    */
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    public class CustomWebView extends WebView {
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    private boolean mIsFullScreen = false;
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    private Context mActivity;
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    private ProgressBar mProgressBar;
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    /**
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    * 视频全屏参数
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    */
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    protected static final FrameLayout.LayoutParams COVER_SCREEN_PARAMS = new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
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    private View customView;
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    private FrameLayout fullscreenContainer;
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    private WebChromeClient.CustomViewCallback customViewCallback;
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    public CustomWebView(@NonNull Context context) {
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    super(context);
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    mActivity = context;
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    initView();
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    }
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    public CustomWebView(@NonNull Context context, @Nullable AttributeSet attrs) {
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    super(context, attrs);
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    mActivity = context;
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    initView();
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    }
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    public CustomWebView(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
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    super(context, attrs, defStyleAttr);
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    mActivity = context;
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    initView();
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    }
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    @Override
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    protected void onMeasure(int widthMeasureSpec

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