向活动添加按钮以打开浏览器URL

Question

我想在我的一个活动中添加一个按钮(显示一篇新闻文章),因此当用户点击该按钮时,该文章将在其浏览器中打开.到目前为止,我已经在我的xml中添加了按钮,它出现了.我只是遇到点击监听器的麻烦.下面是我的代码,我收到'setOnClickListener'的错误,即'非静态方法'setOnClickListener(android.view.View.onClickListener)'无法从静态内容中引用.

我不确定这意味着什么!也许我不是在正确的地方调用方法,或者方法本身只有一个错误？

请有人看看,谢谢!

import android.content.Intent;
import android.media.Image;
import android.net.Uri;
import android.support.v4.app.ShareCompat;
import android.support.v4.view.MenuItemCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.ShareActionProvider;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.view.View.OnClickListener;

import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.JsonArrayRequest;
import com.android.volley.toolbox.JsonObjectRequest;
import com.android.volley.toolbox.NetworkImageView;

import org.json.JSONException;
import org.json.JSONObject;
public class NewsItemActivity extends AppCompatActivity {

    //Declare java object for the UI elements
    private TextView itemTitle;
    private TextView itemDate;
    private TextView itemContent;
    private NetworkImageView itemImage;

    private ShareActionProvider mShareActionProvider;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_news_item);

        itemTitle = (TextView) findViewById(R.id.itemTitle);
        itemDate = (TextView) findViewById(R.id.itemDate);
        itemContent = (TextView) findViewById(R.id.itemContent);
        itemImage = (NetworkImageView) findViewById(R.id.itemImage);

        EDANewsApp app = EDANewsApp.getInstance();

        Intent intent = getIntent();
        int itemId = intent.getIntExtra("newsItemId", 0);

        String url = "http://www.efstratiou.info/projects/newsfeed/getItem.php?id="+itemId;

        JsonObjectRequest request = new JsonObjectRequest(url, listener, errorListener);

        app.requestQueue.add(request);

        Button.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                Intent intent = getIntent();
                int itemId = intent.getIntExtra("newsItemId", 0);
                String shareUrl = "http://www.efstratiou.info/projects/newsfeed/getItem.php?id=" + itemId;

                Intent buttonIntent = new Intent();
                buttonIntent.setAction(Intent.ACTION_VIEW);
                buttonIntent.addCategory(Intent.CATEGORY_BROWSABLE);
                buttonIntent.setData(Uri.parse(shareUrl));
                startActivity(buttonIntent);
            }
        });
    };

activity_news_item.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".NewsItemActivity">

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical">

            <TextView
                android:id="@+id/itemTitle"
                android:layout_margin="15dp"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textSize="20sp"
                android:textStyle="bold"
                android:textColor="#3183b9"/>

            <TextView
                android:id="@+id/itemDate"
                android:layout_marginLeft="15dp"
                android:layout_marginBottom="15dp"
                android:textSize="16sp"
                android:textStyle="italic"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />

            <com.android.volley.toolbox.NetworkImageView
                android:id="@+id/itemImage"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                />

            <TextView
                android:id="@+id/itemContent"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_margin="20sp"
                android:textSize="16sp"
                />

            <Button
                android:id="@+id/BrowserButton"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="View in browser"
                android:layout_marginLeft="15dp"
                style="@style/BrowserButton"
                />

        </LinearLayout>
    </ScrollView>

</RelativeLayout>

Answer 1

更改

Button.setOnClickListener(new View.OnClickListener() { ... });

至

Button button = (Button) findViewById(R.id.BrowserButton);
button.setOnClickListener(new View.OnClickListener() { ... });

您需要setOnClickListener在实例上调用该方法Button,而不是在类本身上调用.