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我试图WebView在一个页面中显示两个s，但最后我意识到它很丑陋，所以我想知道是否有办法在这两个WebViews之间滑动，如果有，如何编码。

这是我的旧代码（WebView一页中有两个）

public class MainActivity extends Activity {

    @TargetApi(Build.VERSION_CODES.CUPCAKE)
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
      


        WebView webView = (WebView) findViewById(R.id.Webview1);
        WebView webView2 = (WebView) findViewById(R.id.Webview2);

        webView.getSettings().setBuiltInZoomControls(true);
        webView.getSettings().setSupportZoom(true);
        webView2.getSettings().setBuiltInZoomControls(true);
        webView2.getSettings().setSupportZoom(true);


        webView.setVerticalScrollBarEnabled(true);
        webView.setHorizontalScrollBarEnabled(true);
        webView2.setHorizontalScrollBarEnabled(true);
        webView2.setVerticalScrollBarEnabled(true);

        webView.getSettings().setJavaScriptEnabled(true);
        webView2.getSettings().setJavaScriptEnabled(true);

        webView.loadUrl("file:///android_asset/BarChart.html");
        webView2.loadUrl("file:///android_asset/PieChart.html");
    }
4

1 回答 1

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要在两个 webview 之间滑动，您需要自定义 webview，因为默认情况下 webview 没有滑动功能，并且在它们两者之间进行更改。下面的代码很好地做到了这一点。版本更改，还添加了顶部和底部滑动功能的代码。

import androidx.appcompat.app.AppCompatActivity;
import androidx.constraintlayout.widget.ConstraintLayout;

import android.os.Bundle;

import android.view.Gravity;
import android.view.ViewGroup;
import android.widget.Button;
import android.view.View;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.content.Context;
import android.view.MotionEvent;
import android.view.GestureDetector;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.widget.LinearLayout;
import android.widget.Toast;
import android.widget.LinearLayout.LayoutParams;

public class MainActivity extends AppCompatActivity {

    MyWebView webView1;
    MyWebView webView2;

    LinearLayout ll1;
    LinearLayout ll2;

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        ConstraintLayout parentLayout = (ConstraintLayout) findViewById(R.id.parentlayout);

        Button b1 = new Button(this);
        b1.setText("Mobile");
        b1.setWidth(140);
        Button b2 = new Button(this);
        b2.setText("Web");
        b2.setWidth(140);

        LinearLayout linearlayout1 = new LinearLayout(this);

        LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(
                ViewGroup.LayoutParams.MATCH_PARENT, 140);

        LinearLayout.LayoutParams buttonParams = new LinearLayout.LayoutParams(
                450, 140);

        linearlayout1.setLayoutParams(layoutParams);
        linearlayout1.setOrientation(LinearLayout.HORIZONTAL);
        linearlayout1.setGravity(Gravity.CENTER | Gravity.TOP);
        linearlayout1.addView(b1, buttonParams);
        linearlayout1.addView(b2, buttonParams);

        ll1 = new LinearLayout(this);
        ll2 = new LinearLayout(this);

        webView1 = new MyWebView(this);
        webView2 = new MyWebView(this);

        LinearLayout.LayoutParams layoutParams1 = new LinearLayout.LayoutParams(
                LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT);

        parentLayout.addView(linearlayout1);

        parentLayout.addView(ll1, layoutParams1);
        parentLayout.addView(ll2, layoutParams1);

        ll1.setVisibility(View.VISIBLE);
        ll2.setVisibility(View.INVISIBLE);

        LinearLayout.LayoutParams layoutParams2 = new LinearLayout.LayoutParams(
                LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT);

        layoutParams2.setMargins(30, 150, 30, 0);

        ll1.addView(webView1, layoutParams2);
        ll2.addView(webView2, layoutParams2);

        webView1.setInitialScale(1);
        webView1.getSettings().setJavaScriptEnabled(true);
        webView1.getSettings().setLoadWithOverviewMode(true);
        webView1.getSettings().setUseWideViewPort(true);
        webView1.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY);
        webView1.setScrollbarFadingEnabled(false);
        webView1.getSettings().setBuiltInZoomControls(true);
        webView1.getSettings().setDomStorageEnabled(true);
        webView1.setWebViewClient(new WebViewClient());
        webView1.loadUrl("http://example.com");


        webView2.setInitialScale(1);
        webView2.getSettings().setJavaScriptEnabled(true);
        webView2.getSettings().setLoadWithOverviewMode(true);
        webView2.getSettings().setUseWideViewPort(true);
        webView2.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY);
        webView2.setScrollbarFadingEnabled(false);
        webView2.getSettings().setBuiltInZoomControls(true);
        webView2.getSettings().setDomStorageEnabled(true);
        webView2.setWebViewClient(new WebViewClient());
        webView2.loadUrl("https://bestinternetsearch.com");

        getSupportActionBar().hide();

        // mobile view
        b1.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                // Do something in response to button click
                ll1.setVisibility(View.VISIBLE);
                ll2.setVisibility(View.INVISIBLE);

                show_toast("button1");
            }
        });

        // web view
        b2.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                // Do something in response to button click
                ll1.setVisibility(View.INVISIBLE);
                ll2.setVisibility(View.VISIBLE);

                show_toast("button2");
            }
        });

    }

    void show_toast(final String text) {
        Toast t = Toast.makeText(this, text, Toast.LENGTH_SHORT);
        t.show();
    }


    class MyWebView extends WebView {
        Context context;
        GestureDetector gd;
        MyWebView mywebview;

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

        public MyWebView(Context context) {
            super(context);
            this.context = context;
            gd = new GestureDetector(context, sogl);
            mywebview = this;
        }

        @Override
        public boolean onTouchEvent(MotionEvent event) {
            gd.onTouchEvent(event);
            return super.onTouchEvent(event);
        }

        GestureDetector.SimpleOnGestureListener sogl = new SimpleOnGestureListener() {
            public boolean onDown(MotionEvent event) {
                return true;
            }

            @Override
            public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
                float distanceX = e2.getX() - e1.getX();
                float distanceY = e2.getY() - e1.getY();

                if (Math.abs(distanceX) > Math.abs(distanceY)) {
                    if (Math.abs(distanceX) > Math.abs(distanceY) && Math.abs(distanceX) > SWIPE_DISTANCE_THRESHOLD && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) {
                        if (distanceX > 0) {
                            //mywebview.goForward();
                            //show_toast("swipe right");
                            ll1.setVisibility(View.VISIBLE);
                            ll2.setVisibility(View.INVISIBLE);
                        } else {
                            //mywebview.goBack();
                            //show_toast("swipe left");
                            ll1.setVisibility(View.INVISIBLE);
                            ll2.setVisibility(View.VISIBLE);
                        }
                        return true;
                    }
                }
                else if (Math.abs(distanceY) > SWIPE_DISTANCE_THRESHOLD && Math.abs(velocityY) > SWIPE_VELOCITY_THRESHOLD) {
                    if (distanceY > 0) {
                        show_toast("swipe bottom");
                        //onSwipeBottom();
                    } else {
                        show_toast("swipe top");
                        //onSwipeTop();
                    }
                    return true;
                }
                return false;
            }

        };

        void show_toast(final String text) {
            Toast t = Toast.makeText(context, text, Toast.LENGTH_SHORT);
            t.show();
        }


    }


    //@Override
    //public void onBackPressed() {  // navigation bar
        //webview.goBack();
        //super.onBackPressed();
    //}

}
于 2021-11-09T00:46:06.247 回答