我有这个代码：
[...]
{
webView = (WebView) findViewById(R.id.webView1);
webView.setInitialScale(getScale(Double.parseDouble(pubPages)));
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setSupportZoom(true);
webView.getSettings().setBuiltInZoomControls(true);
webView.getSettings().setDefaultZoom(WebSettings.ZoomDensity.FAR);
webView.getSettings().setLoadWithOverviewMode(true);
webView.getSettings().setUseWideViewPort(true);
webView.setPadding(0, 0, 0, 0);
webView.setWebChromeClient(new WebChromeClient() {
public void onProgressChanged(WebView view, int progress)
{
activity.setTitle("Loading...");
activity.setProgress(progress * 100);
if(progress == 100)
activity.setTitle(R.string.app_name);
}
});
webView.setWebViewClient(new WebViewClient() {
@Override
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl)
{
// Handle the error
}
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url)
{
view.loadUrl(url);
return true;
}
});
webView.loadUrl("http://urltoshow");
}
private int getScale(double numPages){
DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
int screenHeight = dm.heightPixels;
Double val = (new Double(screenHeight-40)/(new Double(1024)));
val = val * 100d;
return val.intValue();
}
它工作得很好，但我想不允许将侧面缩放到低于其自然高度。
放大"是"，缩小"是"但要达到一定程度。
如何做到这一点？
面向子孙后代：
public class CustomWebView extends WebView {
static final int NONE = 0;
static final int DRAG = 1;
static final int ZOOM = 2;
int mode = NONE;
PointF start = new PointF();
PointF mid = new PointF();
float oldDist = 1f;
float scale = 0f;
float oldscale = 0f;
int displayHeight;
public CustomWebView(Context context) {
super(context);
}
public CustomWebView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public CustomWebView(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
boolean consumed = super.onTouchEvent(ev);
if (isClickable())
switch (ev.getAction() & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_DOWN:
start.set(ev.getX(), ev.getY());
mode = DRAG;
break;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_POINTER_UP:
mode = NONE;
break;
case MotionEvent.ACTION_POINTER_DOWN:
oldDist = spacing(ev);
if (oldDist > 5f) {
midPoint(mid, ev);
mode = ZOOM;
}
break;
case MotionEvent.ACTION_MOVE:
if (mode == DRAG) {
}
else if (mode == ZOOM) {
float newDist = spacing(ev);
if (newDist > 5f) {
scale = newDist / oldDist;
if(scale>1){
if(Math.abs(oldscale-scale)>0.3){
zoomIn();
oldscale = scale;
}
}
System.out.println(scale);
if(scale<1){
if((getContentHeight()*getScale()>displayHeight)){
zoomOut();
System.out.println(getScale());
}
}
}
}
break;
}
return consumed;
}
private float spacing(MotionEvent event) {
float x = event.getX(0) - event.getX(1);
float y = event.getY(0) - event.getY(1);
return FloatMath.sqrt(x * x + y * y);
}
private void midPoint(PointF point, MotionEvent event) {
float x = event.getX(0) + event.getX(1);
float y = event.getY(0) + event.getY(1);
point.set(x / 2, y / 2);
}
}
这很好。
webview.getSettings().setBuiltInZoomControls(true);
如果你想控制放大-缩小，那么不要使用默认的放大控制。在您的xml文件集中。。
<ZoomControls android:id="@+id/zoomctrl"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="top|center_horizontal"
/>
现在。在您的活动中声明并初始化ZoomControls zc;
class CurOverlay extends Overlay {
private GeoPoint pointToDraw;
public void setPointToDraw(GeoPoint point) {
pointToDraw = point;
}
public OnTouchListener mMapTouch = new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
Log.v("TAG", "inside onTouch");
zoomlvl = curmapView.getZoomLevel();
if (zoomlvl == 19)
zc.setIsZoomInEnabled(false);
else if (zoomlvl == 1)
zc.setIsZoomOutEnabled(false);
else {
zc.setIsZoomInEnabled(true);
zc.setIsZoomOutEnabled(true);
}
return false;
}
};
...
....
}
对于放大和缩小的点击事件是。。
zc.setOnZoomInClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
zc.setIsZoomOutEnabled(true);
curmapController.zoomIn();
if (curmapView.getZoomLevel() == 19)
zc.setIsZoomInEnabled(false);
}
});
zc.setOnZoomOutClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
zc.setIsZoomInEnabled(true);
curmapController.zoomOut();
if (curmapView.getZoomLevel() == 1)
zc.setIsZoomOutEnabled(false);
}
});
希望这张地图能帮助你。。
FrameLayout mContentView = (FrameLayout) getWindow().
getDecorView().findViewById(android.R.id.content);
final View zoom = this.myWebView.getZoomControls();
mContentView.addView(zoom, ZOOM_PARAMS);
zoom.setVisibility(View.GONE);
用这个！！