android.webkit.WebView#setInitialScale ( )源码实例Demo

/**
 * Enables the required settings and features for the webview
 *
 * @param webView
 */
private void _makeWebSettings(WebView webView) {
    webView.setInitialScale(1);
    WebSettings webSettings = webView.getSettings();
    // Enable Javascript
    webSettings.setJavaScriptEnabled(true);
    // remove a weird white line on the right size
    webView.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY);

    webSettings.setUseWideViewPort(true);
    webSettings.setSupportZoom(true);
    webSettings.setBuiltInZoomControls(true);
    webSettings.setDisplayZoomControls(false);
    webSettings.setLoadWithOverviewMode(true);
    webSettings.setDomStorageEnabled(true); // Required for some NodeJS based code
}
 

@Override
public void onScaleChanged(WebView view, float oldScale, float newScale) {
    super.onScaleChanged(view, oldScale, newScale);
    if (newScale - oldScale > 7) {
        //异常放大，缩回去。
        view.setInitialScale((int) (oldScale / newScale * 100));
    }
}
 

@Override
public void setZoomScale(float scale) {
    if (mAgentWeb != null && mAgentWeb.getWebCreator() != null) {
        WebView webView = mAgentWeb.getWebCreator().getWebView();
        if (webView == null) {
            return;
        }
        webView.setInitialScale((int) (scale * 100));
    }
}
 

@Override
public void onScaleChanged(WebView view, float oldScale, float newScale) {
    super.onScaleChanged(view, oldScale, newScale);
    if (newScale - oldScale > 7) {
        view.setInitialScale((int) (oldScale / newScale * 100)); //异常放大，缩回去。
    }
}
 

@Override
public void onScaleChanged(WebView view, float oldScale, float newScale) {
	LogUtils.i(TAG, "onScaleChanged:" + oldScale + "   n:" + newScale);
	if (newScale - oldScale > CONSTANTS_ABNORMAL_BIG) {
		view.setInitialScale((int) (oldScale / newScale * 100));
	}
}
 

@Override
public void onScaleChanged(WebView view, float oldScale, float newScale) {
    super.onScaleChanged(view, oldScale, newScale);
    if (newScale - oldScale > 7) {
        view.setInitialScale((int) (oldScale / newScale * 100)); //异常放大，缩回去。
    }
}
 

static void setWebViewScale(WebView webView, float webViewHeight, int webViewContentHeight) {
    //case: regulate scale because WebView.getSettings().setLoadWithOverviewMode() does not work
    int scale = (int) (webViewHeight / webViewContentHeight * 100 + 1);

    LogUtil.d("fixZoomIn WB Height:" + webViewHeight + " getContentHeight:" + webViewContentHeight + " scale:" + scale );
    webView.setInitialScale(scale);
}
 

@Override
public void onScaleChanged(WebView view, float oldScale, float newScale) {
    super.onScaleChanged(view, oldScale, newScale);
    if (newScale - oldScale > 7) {
        view.setInitialScale((int) (oldScale / newScale * 100)); //异常放大，缩回去。
    }
}
 

@Override
public void onScaleChanged(WebView view, float oldScale, float newScale) {
    super.onScaleChanged(view, oldScale, newScale);
    if (newScale - oldScale > 7) {
        view.setInitialScale((int) (oldScale / newScale * 100)); //异常放大，缩回去。
    }
}
 

@Override
public void onScaleChanged(WebView view, float oldScale, float newScale) {
    super.onScaleChanged(view, oldScale, newScale);
    if (newScale - oldScale > 7) {
        view.setInitialScale((int) (oldScale / newScale * 100)); //异常放大，缩回去。
    }
}
 

@Override
public void onScaleChanged(WebView view, float oldScale, float newScale) {
    super.onScaleChanged(view, oldScale, newScale);
    if (newScale - oldScale > 7) {
        view.setInitialScale((int) (oldScale / newScale * 100)); //异常放大，缩回去。
    }
}
 

private void c()
{
    WebView webview = (WebView)findViewById(0x7f0a003b);
    WebSettings websettings = webview.getSettings();
    websettings.setUseWideViewPort(true);
    websettings.setLoadWithOverviewMode(true);
    webview.setLayerType(1, null);
    webview.setBackgroundColor(0);
    webview.setInitialScale((100 * getResources().getDisplayMetrics().densityDpi) / 480);
    webview.loadUrl("file:///android_asset/startup.gif");
    (new Handler()).postDelayed(new b(this), 4800L);
    C.setEnabled(false);
    r.setEnabled(false);
    s.setEnabled(false);
}
 

@TargetApi(Build.VERSION_CODES.LOLLIPOP)
private void setUpWebViewDefaults(WebView webView) {
    WebSettings settings = webView.getSettings();

    // 网页内容的宽度是否可大于WebView控件的宽度
    settings.setLoadWithOverviewMode(false);
    // 保存表单数据
    settings.setSaveFormData(true);
    // 是否应该支持使用其屏幕缩放控件和手势缩放
    settings.setSupportZoom(true);
    settings.setBuiltInZoomControls(true);
    settings.setDisplayZoomControls(false);
    // 启动应用缓存
    settings.setAppCacheEnabled(true);
    // 设置缓存模式
    settings.setCacheMode(WebSettings.LOAD_DEFAULT);
    // setDefaultZoom  api19被弃用
    // 设置此属性，可任意比例缩放。
    settings.setUseWideViewPort(true);
    // 缩放比例 1
    webView.setInitialScale(1);
    // 告诉WebView启用JavaScript执行。默认的是false。
    settings.setJavaScriptEnabled(true);
    //  页面加载好以后，再放开图片
    settings.setBlockNetworkImage(false);
    // 使用localStorage则必须打开
    settings.setDomStorageEnabled(true);
    // 排版适应屏幕
    settings.setLayoutAlgorithm(WebSettings.LayoutAlgorithm.NARROW_COLUMNS);
    // WebView是否支持多个窗口。
    settings.setSupportMultipleWindows(true);

    // webview从5.0开始默认不允许混合模式,https中不能加载http资源,需要设置开启。
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        settings.setMixedContentMode(WebSettings.MIXED_CONTENT_ALWAYS_ALLOW);
    }

    /** 设置字体默认缩放大小(改变网页字体大小,setTextSize  api14被弃用)*/
    settings.setTextZoom(100);

    // Enable remote debugging via chrome://inspect
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
        WebView.setWebContentsDebuggingEnabled(true);
    }

    // AppRTC requires third party cookies to work
    CookieManager cookieManager = CookieManager.getInstance();
    cookieManager.setAcceptThirdPartyCookies(webView, true);


}