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其實我有兩個網頁瀏覽,我想基於第一個webview縮放/平移其他webview。對於這個應用程序已經使用了以下代碼,它可以很好地適用於android 3.0,但在後面的設備上它不起作用。我檢查並拋出異常 - 我未找到Field找不到mZoomManager的異常。如何在Java中縮放/縮放Android WebView
我想知道縮放webview的任何替代方法嗎?無法使用webView.setInitialScale();
public void setScale(float scale_factor) throws IllegalArgumentException,
IllegalAccessException, ClassNotFoundException {
try {
float temp_scale = scale_factor * 0.01f;
Class<WebView> webViewClass = (Class<WebView>) this.getClass()
.getSuperclass();
Field mZoomManagerField = webViewClass
.getDeclaredField("mZoomManager");
mZoomManagerField.setAccessible(true);
Object mZoomManagerInstance = mZoomManagerField.get(this);
Class<?> zoomManagerClass;
try {
zoomManagerClass = Class.forName("android.webkit.ZoomManager");
Field mInitialScale = zoomManagerClass
.getDeclaredField("mInitialScale");
mInitialScale.setAccessible(true);
mInitialScale.set(mZoomManagerInstance, temp_scale);
Field mActualScale = zoomManagerClass
.getDeclaredField("mActualScale");
mActualScale.setAccessible(true);
if (temp_scale >=1) {
mActualScale.set(mZoomManagerInstance, temp_scale);
} else {
Field mDefaultScale = zoomManagerClass
.getDeclaredField("mDefaultScale");
mDefaultScale.setAccessible(true);
Object obj=temp_scale;
mDefaultScale.set(mZoomManagerInstance, obj);
mActualScale.set(mZoomManagerInstance, temp_scale);
}
Field mInvActualScale = zoomManagerClass
.getDeclaredField("mInvActualScale");
mInvActualScale.setAccessible(true);
mInvActualScale.set(mZoomManagerInstance, 1/temp_scale);
} catch (Exception e) {
e.printStackTrace();
}
} catch (NoSuchFieldException e) {
e.printStackTrace();
}
}