Android 为 Webview 设置缩放
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Set zoom for Webview
提问by Farha Ansari
I have a WebView and 2 urls to open it it. What I want to do is, when i set a zoom level for 1st url, and then i go to 2nd url, it should also have the same zoom level. Right now, the zoom level resets for both.
我有一个 WebView 和 2 个 url 来打开它。我想要做的是，当我为第一个 url 设置缩放级别，然后转到第二个 url 时，它也应该具有相同的缩放级别。现在，两者的缩放级别都会重置。
Thanks, Farha
谢谢，法哈
回答by Samuel
this will be applicable in this scenario i believe
我相信这将适用于这种情况
mWebView.setInitialScale(ZOOM_LEVEL);
where ZOOM_LEVEL for example can be 25 for 25% 150 for 150%
例如，其中 ZOOM_LEVEL 可以是 25 表示 25% 150 表示 150%
回答by Praveen
use the webSettingsclass
使用webSettings类
webview.getSettings().setDefaultZoom(WebSettings.ZoomDensity.FAR);
Notice that although webSettingsis available since API Level 1, WebSettings.ZoomDensityis available since API Level 7. Works well for all device resolutions.
请注意，虽然webSettings可用，因为API等级1，WebSettings.ZoomDensity是可用，因为API级别7.非常适用于所有的设备分辨率。
Also, in order to enable zoom on the webView, add the following code:
另外，为了在 webView 上启用缩放，添加以下代码：
webView.getSettings().setBuiltInZoomControls(true);
回答by King of Masses
setDefaultZoom is deprecated.
setDefaultZoom 已弃用。
webview.getSettings().setDefaultZoom(WebSettings.ZoomDensity.FAR);
So instead of that you can use like below,
所以你可以像下面这样使用，
webview.setInitialScale(1);
webview.getSettings().setLoadWithOverviewMode(true);
webview.getSettings().setUseWideViewPort(true);
This help you to remove
这可以帮助您删除
setDefaultZoom(WebSettings.ZoomDensity.FAR).
回答by John Weidner
Before you leave the first page, use
在离开第一页之前，使用
int scale = 100 * webView.getScale();
Then after you load the second page, use
然后在加载第二页后，使用
webView.setInitialScale( scale );
回答by yuttadhammo
@John gave the right idea, but one command is enough, since you can get and set before the page shows:
@John 给出了正确的想法，但是一个命令就足够了，因为您可以在页面显示之前获取和设置：
private class MyWebViewClient extends WebViewClient {
public void onPageFinished(WebView view, String url) {
view.setInitialScale((int)(100*view.getScale()));
}
}
then just set this as your WebView's client:
然后将其设置为您的 WebView 的客户端：
webview.setWebViewClient(new MyWebViewClient());
回答by Sumit Sahoo
You can set the zoom to 0.1f
您可以将缩放设置为 0.1f
mWebView.zoomBy(0.1f);
mWebView.zoomBy(0.1f);
回答by KHALID
try this thing
试试这个
int default_zoom_level=100;
Point Scroll=new Point(0,0);
webview1.setInitialScale(default_zoom_level);
webview1.loadData("url");
After doing zoomIn/ZoomOut or Scrolling.Since Scale may be get to change so calculate scale level and scrolling along X and Y Axis.
在执行 zoomIn/ZoomOut 或 Scrolling.Since Scale 之后，可能会发生变化，因此计算缩放级别并沿 X 和 Y 轴滚动。
int current_scale_level=(int)webview1.getScale()*100;
Scroll.x=webview1.getScrollX();
Scroll.y=webview1.getScrollY();
then before loading of next webview do this
webview2.setInitialScale(current_scale_level);
webview2.loadData("url");
webview2.scrollTo(Scroll.x,Scroll.y);
回答by DeepakPanwar
I found this blog helpful:
我发现这个博客很有帮助：
It will help you set initial zoom level and on seek-change content of webview resizes
它将帮助您设置初始缩放级别和 webview 调整大小的搜索更改内容
// Set the initial progress of seek bar mSeekBar.setProgress(mWebView.getSettings().getTextZoom()/25);
// 设置搜索栏的初始进度 mSeekBar.setProgress(mWebView.getSettings().getTextZoom()/25);
// Set a change listener for seek bar
mSeekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int i, boolean b) {
/*
public abstract void setTextZoom (int textZoom)
Sets the text zoom of the page in percent. The default is 100.
Parameters
textZoom : the text zoom in percent
*/
// Zoom the web page text
// We will allow text zooming 25% to 300%
mWebView.getSettings().setTextZoom(i*25);
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
});
http://android--code.blogspot.in/2016/01/android-how-to-change-webview-text-size.html
http://android--code.blogspot.in/2016/01/android-how-to-change-webview-text-size.html
回答by sunil
Zooming of WebView can be controlled programatically by zoomIn()and zoomOut()methods
可以通过zoomIn()和zoomOut()方法以编程方式控制 WebView 的缩放
