Android WebView实现页内跳转以及缩放

配置WebView缩放 参数：

//设置可以支持缩放        
webView.getSettings().setSupportZoom(true);        
//设置true,才能让Webivew支持&lt;meta&gt;标签的viewport属性
webView.getSettings().setUseWideViewPort(true);        
//设置出现缩放工具        
webView.getSettings().setBuiltInZoomControls(true);        
//设置隐藏缩放控件        
webView.getSettings().setDisplayZoomControls(false);        
//最小缩放等级        
webView.setInitialScale(60);

配置WebView页内跳转：

webView.setWebViewClient(new WebViewClient(){    
    @Override    
    public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
        //在WebView中加载要打开的链接        
        view.loadUrl(request.getUrl().toString());        
        return true;    
    }    

    //页面开始加载    
    @Override    
    public void onPageStarted(WebView view, String url, Bitmap favicon) {        
        super.onPageStarted(view, url, favicon);        
        Log.e("WebViewActivity-->", "onPageStarted：");    
    }    

    //页面加载完成的回调方法    
    @Override    
    public void onPageFinished(WebView view, String url) {        
        super.onPageFinished(view, url);        
        Log.e("WebViewActivity-->", "onPageFinished：");    
    }
});

完整内容：

public class WebViewActivity extends BaseActivity {

    @BindView(R.id.web_view)
    WebView webView;
    @BindView(R.id.top_bar)
    TopBar topBar;
    private String url = "https://juejin.cn/";

    @SuppressLint("JavascriptInterface")
    @Override
    protected void init() {
        //横屏设置
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);

        topBar.setOnClickListener(v -> finish());

        webView.getSettings().setJavaScriptEnabled(true);
        webView.setWebViewClient(new WebViewClient(){
            @Override
            public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
                //在WebView中加载要打开的链接
                view.loadUrl(request.getUrl().toString());
                return true;
            }

            //页面开始加载
            @Override
            public void onPageStarted(WebView view, String url, Bitmap favicon) {
                super.onPageStarted(view, url, favicon);
                Log.e("WebViewActivity-->", "onPageStarted：");
            }

            //页面加载完成的回调方法
            @Override
            public void onPageFinished(WebView view, String url) {
                super.onPageFinished(view, url);
                Log.e("WebViewActivity-->", "onPageFinished：");
            }
        });
        webView.setWebChromeClient(new WebChromeClient(){
            @Override
            public void onReceivedTitle(WebView view, String title) {
                super.onReceivedTitle(view, title);
                //展示当前网页标题
                topBar.setTitle(title);
            }
        });
        //支持编码
        webView.getSettings().setDefaultTextEncodingName("utf-8");
        webView.getSettings().setDomStorageEnabled(true);
        //开启安全模式
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            webView.getSettings().setSafeBrowsingEnabled(true);
        }
        //缩放
        //设置可以支持缩放
        webView.getSettings().setSupportZoom(true);
        //设置true,才能让Webivew支持<meta>标签的viewport属性
        webView.getSettings().setUseWideViewPort(true);
        //设置出现缩放工具
        webView.getSettings().setBuiltInZoomControls(true);
        //设置隐藏缩放控件
        webView.getSettings().setDisplayZoomControls(false);
        //最小缩放等级
        webView.setInitialScale(100);
        webView.loadUrl(url);
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (webView.canGoBack() &amp;&amp; keyCode == KeyEvent.KEYCODE_BACK) {
            webView.goBack();
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        webView.destroy();
        webView = null;
    }

    @Override
    protected int setLayoutResourceID() {
        return R.layout.activity_web_view;
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // TODO: add setContentView(...) invocation
        ButterKnife.bind(this);
    }
}