效果如图：
?没有直接获取文本的方法，用的是通过js注入，调用js函数，使用js调用Android的方法并传入界面的<html></html>里面的内容。
布局内容：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:orientation="vertical">
<EditText
android:id="@+id/et_url"
android:maxLines="1"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<Button
android:id="@+id/btn_go"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="go" />
<LinearLayout
android:id="@+id/lin_web"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"/>
</LinearLayout>
<ScrollView
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1">
<TextView
android:id="@+id/tv"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:typeface="monospace" />
</ScrollView>
</LinearLayout>界面代码：?
import android.annotation.SuppressLint;
import android.net.http.SslError;
import android.os.Build;
import android.os.Bundle;
import android.util.Log;
import android.view.ViewGroup;
import android.webkit.JavascriptInterface;
import android.webkit.SslErrorHandler;
import android.webkit.WebResourceRequest;
import android.webkit.WebResourceResponse;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.TextView;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;
public class WebActivity extends AppCompatActivity {
private final String TAG = "WebActivity";
private WebView webView;
private TextView tv;
private EditText etUrl;
private Button btnGo;
private LinearLayout webLin;
@SuppressLint({"AddJavascriptInterface", "SetJavaScriptEnabled"})
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_web);
tv = findViewById(R.id.tv);
webLin = findViewById(R.id.lin_web);
etUrl = findViewById(R.id.et_url);
btnGo = findViewById(R.id.btn_go);
etUrl.setText("www.baidu.com");
addWebView();
initWebSetting();
initListener();
}
private void initListener() {
btnGo.setOnClickListener(v -> {
String url = etUrl.getText().toString();
if(!url.startsWith("http")){
url = "https://"+url;
}
webView.loadUrl(url);
});
}
@SuppressLint("AddJavascriptInterface")
private void addWebView() {
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
webView = new WebView(getApplicationContext());
webView.setLayoutParams(params);
webLin.addView(webView);
webView.addJavascriptInterface(new InJavaScriptLocalObj(),"java_obj");
webView.setWebViewClient(webViewClient);
}
private WebViewClient webViewClient = new WebViewClient(){
@Override
public void onPageFinished(WebView view, String url) {
// 在结束加载网页时会回调
Log.i(TAG, "onPageFinished: "+url);
etUrl.setText(url);
// 获取页面内容
view.loadUrl("javascript:window.java_obj.showSource("
+ "document.getElementsByTagName('html')[0].innerHTML);");
super.onPageFinished(view, url);
}
@Override
public void onReceivedError(WebView view, int errorCode,
String description, String failingUrl) {
// 加载错误的时候会回调，在其中可做错误处理，比如再请求加载一次，或者提示404的错误页面
super.onReceivedError(view, errorCode, description, failingUrl);
tv.setText(description);
Log.i(TAG, "onReceivedError: description:"+description);
Log.i(TAG, "onReceivedError: failingUrl:"+failingUrl);
}
@Override
public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
// handler.cancel();// Android默认的处理方式
handler.proceed();// 接受所有网站的证书
}
@Override
public WebResourceResponse shouldInterceptRequest(WebView view,
WebResourceRequest request) {
// 在每一次请求资源时，都会通过这个函数来回调
return super.shouldInterceptRequest(view, request);
}
};
public final class InJavaScriptLocalObj{
@JavascriptInterface
public void showSource(String html) {
html = html.replaceAll(">",">\n\t");
html = html.replaceAll("</","\n</");
tv.setText(html);
}
}
@SuppressLint("SetJavaScriptEnabled")
private void initWebSetting() {
WebSettings webSettings = webView.getSettings();
webSettings.setDefaultZoom(WebSettings.ZoomDensity.MEDIUM); //设置页面默认缩放密度
webSettings.setDefaultTextEncodingName("UTF-8"); //设置默认的文本编码名称，以便在解码html页面时使用
webSettings.setAllowContentAccess(true); //启动或禁用WebView内的内容URL访问
webSettings.setAppCacheEnabled(false); //设置是否应该启用应用程序缓存api
webSettings.setBuiltInZoomControls(false); //设置WebView是否应该使用其内置的缩放机制
webSettings.setUseWideViewPort(true); //设置WebView是否应该支持viewport
webSettings.setLoadWithOverviewMode(true); //不管WebView是否在概述模式中载入页面，将内容放大适合屏幕宽度
webSettings.setCacheMode(WebSettings.LOAD_NO_CACHE); //重写缓存的使用方式
webSettings.setJavaScriptCanOpenWindowsAutomatically(true); //告知js自动打开窗口
webSettings.setLoadsImagesAutomatically(true); //设置WebView是否应该载入图像资源
webSettings.setAllowFileAccess(true); //启用或禁用WebView内的文件访问
webSettings.setDomStorageEnabled(true); //设置是否启用了DOM存储API,
//支持屏幕缩放
webSettings.setSupportZoom(true);
//支持js
webSettings.setJavaScriptEnabled(true);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
webSettings.setMixedContentMode(WebSettings.MIXED_CONTENT_ALWAYS_ALLOW);
}
}
@Override
public void onPause() {
super.onPause();
webView.onPause();
webView.pauseTimers();
}
@Override
public void onResume() {
super.onResume();
webView.onResume();
webView.resumeTimers();
}
@Override
protected void onDestroy() {
webLin.removeView(webView);
if (webView != null) {
webView.clearHistory();
((ViewGroup) webView.getParent()).removeView(webView);
webView.loadUrl("about:blank");
webView.stopLoading();
webView.setWebChromeClient(null);
webView.setWebViewClient(null);
webView.destroy();
webView = null;
}
super.onDestroy();
}
}