java Android Webview不会从按钮侦听器加载Url

Question

它会加载站点，但只有当它不在Action Listener中时才会加载。 即使我在onCreate方法中向下加载url，它也能工作。 我已经检查了Webview是否不可见，按钮侦听器也可以工作

在编写了几个小时的其他代码后，问题开始了

WebView wbvCheckURL; Button btnSearch; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); wbvCheckURL = findViewById(R.id.wbvCheckURL); btnSearch = findViewById(R.id.btnSearch); wbvCheckURL.setWebChromeClient(new WebChromeClient() { @Override public void onProgressChanged(WebView view, int newProgress) { ... } @Override public void onReceivedTitle(WebView view, String title) { ... } }); wbvCheckURL.getSettings().setJavaScriptEnabled(true); wbvCheckURL.setWebViewClient(new WebViewClient()); // When i do it like this it works: // wbvCheckURL.loadUrl("http://www.google.de"); btnSearch.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { wbvCheckURL.loadUrl("http://www.google.de"); hideKeyboard(v); LoadCode(); } }); }

Answer 1

你可以试试我的。我的是另一种带有抽屉布局的网络视图。希望您了解如何插入webview

package com.example.appname;

import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.ImageButton;

import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.ShareActionProvider;
import androidx.appcompat.widget.Toolbar;
import androidx.core.view.MenuItemCompat;

public class Provokinc extends AppCompatActivity {

    private WebView webView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_provokinc);
        Toolbar toolbar = findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        webView = findViewById(R.id.webView);
        webView.setWebViewClient(new WebViewClient());
        webView.loadUrl("https://stackoverflow.com/questions/63438455/android-webview-doesnt-load-the-url-from-button-listener");

        WebSettings webSettings = webView.getSettings();
        webSettings.setJavaScriptEnabled(true);

        ImageButton ImageButton = (ImageButton) findViewById(R.id.imageButtonA);
        ImageButton ImageButton1 = (ImageButton) findViewById(R.id.imageButtonB);
        ImageButton ImageButton2 = (ImageButton) findViewById(R.id.imageButtonC);
        ImageButton ImageButton3 = (ImageButton) findViewById(R.id.imageButtonD);
        ImageButton ImageButton4 = (ImageButton) findViewById(R.id.imageButtonE);


        ImageButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                Intent int1 = new Intent(Provokinc.this,Main3Activity.class);
                startActivity(int1);
            }
        });

        ImageButton1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                Intent int2 = new Intent(Provokinc.this, Main2Activity.class);
                startActivity(int2);
            }
        });

        ImageButton2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                Intent int3 = new Intent(Provokinc.this, Provokinc.class);
                startActivity(int3);
            }
        });

        ImageButton3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                Intent int4 = new Intent(Provokinc.this, ActivityItemDetails.class);
                startActivity(int4);
            }
        });

        ImageButton4.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                Intent int5 = new Intent(Provokinc.this, MainActivity.class);
                startActivity(int5);
            }
        });
    }


    @Override
    public void onBackPressed(){
        if(webView.canGoBack()){
            webView.goBack();
        }                 else{
            super.onBackPressed();
        }
    }


}