WebViewのズームボタンを隠す

public class MainActivity extends Activity {
	private WebView webView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        webView = (WebView)findViewById(R.id.a);
        webView.getSettings().setJavaScriptEnabled(true);
        webView.getSettings().setSupportZoom(true);
        webView.getSettings().setSupportMultipleWindows(true);
        webView.getSettings().setBuiltInZoomControls(true); //       controler
        webView.getSettings().setDefaultZoom(ZoomDensity.CLOSE);//      
	
		//changeZoomControls(weView);
		//wv.setInitialScale(100);
		//
        webView.loadUrl("www.csdn.net");
		int sysVersion = Integer.parseInt(VERSION.SDK);
		if(sysVersion>=11){
			setZoomControlGoneX(webView.getSettings(),new Object[]{false});
		}else{
			setZoomControlGone(webView);
		}
		
		//ws.setDisplayZoomControls(false);//3.0      ，3.0     
		
	}
	
	
	//  webview         3.0   
	public void setZoomControlGoneX(WebSettings view ,Object[] args){
		 Class classType = view.getClass();
		 try { 
		     Class[] argsClass = new Class[args.length];  
		   
		     for (int i = 0, j = args.length; i < j; i++) {  
		         argsClass[i] = args[i].getClass();  
		     }
		     Method[] ms= classType.getMethods();
		     for (int i = 0; i < ms.length; i++) {
		    	 if(ms[i].getName().equals("setDisplayZoomControls")){
		    		 try {
		    			 ms[i].invoke(view, false);
						} catch (Exception e) {
							e.printStackTrace();
						}
		    		 break;
		    	 }
				//Log.e("test", ">>"+ms[i].getName());
			}

		}catch (Exception e) {
			e.printStackTrace();
		}
		 
	}
	
	
	//  webview         3.0  
	public void setZoomControlGone(View view) {  
	    Class classType;  
	    Field field;  
	    try {  
	        classType = WebView.class;  
	        field = classType.getDeclaredField("mZoomButtonsController");  
	        field.setAccessible(true);  
	        ZoomButtonsController mZoomButtonsController = new ZoomButtonsController(view);  
	        mZoomButtonsController.getZoomControls().setVisibility(View.GONE);  
	        try {  
	            field.set(view, mZoomButtonsController);  
	        } catch (IllegalArgumentException e) {  
	            e.printStackTrace();  
	        } catch (IllegalAccessException e) {  
	            e.printStackTrace();  
	        }  
	    } catch (SecurityException e) {  
	        e.printStackTrace();  
	    } catch (NoSuchFieldException e) {  
	        e.printStackTrace();  
	    }  
	}