Question

当我使用下面的代码时，它给出了一个错误“对于类型对象，方法onTouch（运动事件）是未定义的。”错误在“return super.onTouch（event）;”行中。我不知道它是什么。我的应用程序是关于检测webview上的手势。很好地检测到手势，但它禁用了webview的内置手势，这就是我添加这段代码以便可以检测到内置手势的原因。

webView.setOnTouchListener(new View.OnTouchListener() {

@Override
  public boolean onTouch(View v, MotionEvent event) {
                if (gestureDetector.onTouchEvent(event)) {
                    return true;
                }
               return super.onTouch(event);
            }
        });}

如果有人想要整个代码......这里是

package i.rock.fb;

import android.os.Bundle;
import android.app.Activity;

import android.view.GestureDetector;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.MenuInflater;
import android.view.MotionEvent;
import android.view.View;
import android.webkit.WebView;


public class MainActivity extends Activity {

    @Override
    public boolean onCreateOptionsMenu(android.view.Menu menu) {

         super.onCreateOptionsMenu(menu);
         MenuInflater blowup=getMenuInflater();
         blowup.inflate(R.menu.main, menu);
         return true;
    }


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        WebView webView=(WebView)findViewById(R.id.webView);
    webView.setWebViewClient(new our());
    webView.getSettings().setBuiltInZoomControls(true);
    webView.getSettings().setJavaScriptEnabled(true);

    webView.loadUrl("file:///android_asset/www/index.html");




    @SuppressWarnings("deprecation")
    final GestureDetector gestureDetector = new GestureDetector(new GestureListener());

 webView.setOnTouchListener(new View.OnTouchListener() {

     @Override
     public boolean onTouch(View v, MotionEvent event) {
                if (gestureDetector.onTouchEvent(event)) {
                    return true;
                }
               return super.onTouch(event);
            }
        });}
    final class GestureListener extends SimpleOnGestureListener {

            private static final int SWIPE_THRESHOLD = 100;
            private static final int SWIPE_VELOCITY_THRESHOLD = 100;

            @Override
            public boolean onDown(MotionEvent e) {
                return true;
            }

            @Override
            public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
                boolean result = false;WebView webView=(WebView)findViewById(R.id.webView);
                try {
                    float diffY = e2.getY() - e1.getY();
                    float diffX = e2.getX() - e1.getX();
                    if (Math.abs(diffX) > Math.abs(diffY)) {
                        if (Math.abs(diffX) > SWIPE_THRESHOLD && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) {
                            if (diffX > 0) {

                                onSwipeRight();
                            } else {

                                onSwipeLeft();
                            }
                        }
                    } 

                } catch (Exception exception) {
                    exception.printStackTrace();
                }
                return result;

        }

     }




     public void onSwipeRight() {WebView webView=(WebView)findViewById(R.id.webView);
         webView.loadUrl("http://www.google.com");
        }

        public void onSwipeLeft() {WebView webView=(WebView)findViewById(R.id.webView);
         webView.loadUrl("http://www.google.com");

    }}

Answer 1

看看这个图书馆兄弟，也许我会帮助你 https://github.com/NikolayKolomiytsev/zTouch

Android手势无法正常工作

1 个答案: