Question

我是android应用程序的超级新手，我正在尝试创建一个仅在单击时加载网页的应用程序。但是，我不断收到错误消息：can't find symbol variable URL

这是我的MainActivity代码：

  package com.example.logger;

    import android.content.Intent;
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.view.View;


    public class MainActivity extends AppCompatActivity {
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
        }
        public void browser1(View view) {
            Intent browserIntent=new Intent(Intent.ACTION_VIEW,url.parse("xxxxxxxxxxx"));
        startActivity(browserIntent);
      }
}

请帮忙弄清楚我的缺失。

Answer 1

应该为Uri，而不是url

 Intent browserIntent=new Intent(Intent.ACTION_VIEW,Uri.parse("xxxxxxx"));

确保顶部有import android.net.Uri。

Answer 2

在清单文件中添加权限

 <uses-permission android:name="android.permission.INTERNET" />

将此添加到xml文件中

<WebView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/webview"
    android:layout_centerVertical="true"
    android:layout_centerHorizontal="true" />

在MainActivity中添加此

public class MainActivity extends AppCompatActivity {
    ProgressDialog pd;
    WebView wv;
    String url="www.google .com";

    private ImageView back3;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_social_media);
        back3 = (ImageView) findViewById(R.id.back3);
        back3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                onBackPressed();
            }
        });
        wv=(WebView)findViewById(R.id.webview);
        pd = new ProgressDialog(SocialMedia.this);
        pd.setCancelable(true);
        pd.setMessage("Loading....");
        // pd.setIcon(R.drawable.load);
        // wv.getSettings().setLoadsImagesAutomatically(true);
        wv.setWebViewClient(new MyBrowser(pd));
        wv.getSettings().setJavaScriptEnabled(true);

        wv.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
        wv.loadUrl(url);
    }
    public  class MyBrowser extends WebViewClient{
        ProgressDialog pd;

        public MyBrowser(ProgressDialog pd) {
            this.pd = pd;
            pd.show();
        }


        @Override
        public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
            view.loadUrl(url);
            return super.shouldOverrideUrlLoading(view, request);
        }

        @Override
        public void onPageFinished(WebView view, String url) {
            super.onPageFinished(view, url);
            if(pd.isShowing()){
                pd.dismiss();
            }
        }

        @Override
        public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
            super.onReceivedError(view, errorCode, description, failingUrl);
            Toast.makeText(getApplicationContext(),"Error"+description,Toast.LENGTH_SHORT).show();
        }
    }

}

如何创建一个加载网页的android按钮？

2 个答案: