在WebView上以編程方式雙擊

Question

我有一個通用活動，其中包含一個webview來顯示不同的基於HTML的內容。

每個html內容都有這樣的元標記。

<meta name="viewport" content="width=device-width,height=device-height, minimum-scale=0.4, maximum-scale=3,initial-scale=0.5"> 

並且WebView以編程方式配置為使用這些代碼使屏幕中的內容適合。

WebView webView = (WebView) findViewById(R.id.webview1);
        webView.getSettings().setJavaScriptEnabled(true);
        webView.getSettings().setLoadWithOverviewMode(true);        
        webView.getSettings().setUseWideViewPort(true);     
        webView.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY);
        webView.setScrollbarFadingEnabled(true);
        webView.getSettings().setBuiltInZoomControls(true);    
        webView.getSettings().setLoadsImagesAutomatically(true);
        webView.getSettings().setLightTouchEnabled(true);
        webView.getSettings().setDomStorageEnabled(true);

        webView.setBackgroundColor(0);

不幸的是，元代碼和webview配置都不適合屏幕中的內容; 但雙擊適合內容優秀。 所以我想我能以編程方式模擬webview上的雙擊嗎？

Answer 1

/**
 * 
 */
package com.y2cf.hoppr.utils.viewutils;

import android.content.Context;
import android.os.SystemClock;
import android.util.AttributeSet;
import android.util.Log;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.webkit.WebView;

/**
 * @author rajesh
 *
 */
public class MyWebView extends WebView {


    private GestureDetector gestureDetector;

    /**
     * @param context
     */
    public MyWebView(Context context) {
        super(context);
        gestureDetector = new GestureDetector(context, new GestureListener());
        // TODO Auto-generated constructor stub
    }

    /**
     * @param context
     * @param attrs
     */
    public MyWebView(Context context, AttributeSet attrs) {
        super(context, attrs);
        gestureDetector = new GestureDetector(context, new GestureListener());
        // TODO Auto-generated constructor stub
    }

    /**
     * @param context
     * @param attrs
     * @param defStyle
     */
    public MyWebView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        gestureDetector = new GestureDetector(context, new GestureListener());
        // TODO Auto-generated constructor stub
    }


    public void simulateDoubleTap()
    {

        simulateDoubleTapEvent(0);
        simulateDoubleTapEvent(2);
        simulateDoubleTapEvent(2);
        simulateDoubleTapEvent(1);
        simulateDoubleTapEvent(0);
    }

    private void simulateDoubleTapEvent(int action)
    {
        long downTime = SystemClock.uptimeMillis();
        long eventTime = SystemClock.uptimeMillis() + 100;
        float x = 0.0f;
        float y = 0.0f;
        // List of meta states found here: developer.android.com/reference/android/view/KeyEvent.html#getMetaState()
        int metaState = 0;
        MotionEvent me = MotionEvent.obtain(
            downTime, 
            eventTime, 
            action, 
            x, 
            y, 
            metaState
        );
        dispatchTouchEvent(me);
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        // TODO Auto-generated method stub
        return gestureDetector.onTouchEvent(event);
    }

    private class GestureListener extends GestureDetector.SimpleOnGestureListener {

        @Override
        public boolean onDown(MotionEvent e) {
            return true;
        }
        // event when double tap occurs
        @Override
        public boolean onDoubleTap(MotionEvent e) {
            float x = e.getX();
            float y = e.getY();

            Log.d("Double Tap", "Tapped at: (" + x + "," + y + ")");

            return true;
        }
    }

}

創建一個這樣的類並調用simulateDoubleTap（）方法。 希望這會有所幫助，你的webview應該是這個類的一個實例。