在安卓应用中渲染HTML并实现分页,你可以使用WebView组件来加载和显示HTML内容,并结合JavaScript和CSS来实现分页效果。下面是一个简单的示例代码,演示如何在安卓应用中实现HTML渲染和分页功能:

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import android.annotation.SuppressLint;
import android.os.Bundle;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import androidx.appcompat.app.AppCompatActivity;
public class MainActivity extends AppCompatActivity {
    private WebView webView;
    @SuppressLint("SetJavaScriptEnabled")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        webView = findViewById(R.id.webview);
        // 设置WebView的配置
        WebSettings webSettings = webView.getSettings();
        webSettings.setJavaScriptEnabled(true); // 启用JavaScript
        // 设置WebView的客户端
        webView.setWebViewClient(new WebViewClient());
        webView.setWebChromeClient(new WebChromeClient());
        // 加载HTML内容
        String htmlContent = "Hello, WebView!
This is some sample HTML content.
";
        webView.loadDataWithBaseURL(null, htmlContent, "text/html", "UTF-8", null);
        // 执行JavaScript脚本以实现分页效果
        webView.setWebViewClient(new WebViewClient() {
            @Override
            public void onPageFinished(WebView view, String url) {
                super.onPageFinished(view, url);
                // 执行JavaScript脚本以实现分页效果
                String javascript = "javascript:(function() {" +
                        "    var maxScrollHeight = document.documentElement.scrollHeight;" +
                        "    var currentPage = 0;" +
                        "    var pageSize = window.innerHeight;" +
                        "    var pageCount = Math.ceil(maxScrollHeight / pageSize);" +
                        "    function nextPage() {" +
                        "        if (currentPage < pageCount - 1) {" +
                        "            currentPage++;" +
                        "            window.scrollTo(0, currentPage * pageSize);" +
                        "        }" +
                        "    }" +
                        "    function previousPage() {" +
                        "        if (currentPage > 0) {" +
                        "            currentPage--;" +
                        "            window.scrollTo(0, currentPage * pageSize);" +
                        "        }" +
                        "    }" +
                        "    window.addEventListener('keyup', function(event) {" +
                        "        if (event.key === 'ArrowRight' || event.key === 'PageDown') {" +
                        "            nextPage();" +
                        "        } else if (event.key === 'ArrowLeft' || event.key === 'PageUp') {" +
                        "            previousPage();" +
                        "        }" +
                        "    });" +
                        "})();";
                webView.loadUrl(javascript);
            }
        });
    }
}以上代码中,我们使用WebView加载了一个简单的HTML内容,并在WebView的onPageFinished回调中执行了JavaScript脚本来实现分页效果。JavaScript脚本监听了键盘事件,当用户按下"ArrowRight"、"PageDown"键时,会切换到下一页;当用户按下"ArrowLeft"、"PageUp"键时,会切换到上一页。
请注意,为了使JavaScript代码生效,我们需要在AndroidManifest.xml文件中添加android.permission.INTERNET权限。