Question

我正在尝试将 seismic_text.java 文件中的函数 getUrlContents（string）调用到我的 MainActivity.java 文件中。如何从文件中的任何位置调用该函数？任何信息或提示表示赞赏。我在下面包含我的文件。

这是我的 MainActivity.java ：

package bt.alfaquake;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.app.NotificationManager;
import android.content.Intent;
import android.view.View;
import android.app.PendingIntent;
import android.support.v7.app.ActionBarActivity;
import android.support.v4.app.NotificationCompat;
import bt.alfaquake.seismic_text;

public class MainActivity extends AppCompatActivity {   

    NotificationCompat.Builder notification;
    private static final int uniqueID = 123;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        notification = new NotificationCompat.Builder(this);
    }    
}

这是我的 seismic_text.java ：包装bt.alfaquake;

import java.net.*;
import java.io.*;

public class seismic_text {

        public static String getUrlContents(String theUrl) {
            StringBuilder content = new StringBuilder();
            try
            {
                URL url = new URL(theUrl);
                URLConnection urlConnection = url.openConnection();

                BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));
                String line;

                while ((line = bufferedReader.readLine()) != null)
                {
                    content.append(line + "\n");
                }
                bufferedReader.close();
            }
            catch(Exception e)
            {
                e.printStackTrace();
            }
            return content.toString();
        }
    }
}

Answer 1

只需在MainActivty.java中调用它：

seismic_text.getUrlContents(url);

Answer 2

你可以调用seismic_text.getUrlContents（url）;但它会导致NetworkOnMainThreadException

只需将此调用包装到Simple AsynkTask。

new MyTask().execute();

并从您的代码中调用它：

using System.Xml.Serialization;

// 
// This source code was auto-generated by xsd, Version=4.0.30319.1.
// 


/// <remarks/>
[System.CodeDom.Compiler.GeneratedCodeAttribute("xsd", "4.0.30319.1")]
[System.SerializableAttribute()]
[System.Diagnostics.DebuggerStepThroughAttribute()]
[System.ComponentModel.DesignerCategoryAttribute("code")]
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true)]
[System.Xml.Serialization.XmlRootAttribute(Namespace = "", IsNullable = false)]


public partial class Request
    {

    private string sNameField;



    /// <remarks/>
    public string SName
    {
        get
        {
            return this.sNameField;
        }
        set
        {
            this.sNameField = value;
        }
    }



    /// <remarks/>
    public Message Message
    {
        get
        {
            return this.messageField;
        }
        set
        {
            this.messageField = value;
        }
    }
}

/// <remarks/>
[System.CodeDom.Compiler.GeneratedCodeAttribute("xsd", "4.0.30319.1")]
[System.SerializableAttribute()]
[System.Diagnostics.DebuggerStepThroughAttribute()]
[System.ComponentModel.DesignerCategoryAttribute("code")]
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = false)]

public partial class Message
{

    private AddO addOField;

    /// <remarks/>
    [System.Xml.Serialization.XmlElementAttribute(Namespace = "http://pd.com")]
    public AddO AddO
    {
        get
        {
            return this.addOField;
        }
        set
        {
            this.addOField = value;
        }
    }
}

/// <remarks/>
   [System.CodeDom.Compiler.GeneratedCodeAttribute("xsd", "4.0.30319.1")]
[System.SerializableAttribute()]
[System.Diagnostics.DebuggerStepThroughAttribute()]
[System.ComponentModel.DesignerCategoryAttribute("code")]
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true, Namespace = "http://pd.com")]
[System.Xml.Serialization.XmlRootAttribute(Namespace = "http://pd.com", IsNullable = false)]
public partial class AddO
{

    private CaseD caseD;

    /// <remarks/>
    [System.Xml.Serialization.XmlElementAttribute(Namespace = "http://www.a.com")]
    public CaseD CaseD
    {
        get
        {
            return this.caseDField;
        }
        set
        {
            this.caseDField = value;
        }
    }
}

/// <remarks/>
[System.CodeDom.Compiler.GeneratedCodeAttribute("xsd", "4.0.30319.1")]
[System.SerializableAttribute()]
[System.Diagnostics.DebuggerStepThroughAttribute()]
[System.ComponentModel.DesignerCategoryAttribute("code")]
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true, Namespace = "http://www.a.com")]
[System.Xml.Serialization.XmlRootAttribute(Namespace = "http://www.a.com", IsNullable = false)]
public partial class CaseD
{

    private CaseA caseAField;

    /// <remarks/>
    [System.Xml.Serialization.XmlElementAttribute(Namespace = "http://www.z.com")]
    public CaseA CaseA
    {
        get
        {
            return this.caseAField;
        }
        set
        {
            this.caseAField = value;
        }
    }
}

/// <remarks/>
[System.CodeDom.Compiler.GeneratedCodeAttribute("xsd", "4.0.30319.1")]
[System.SerializableAttribute()]
[System.Diagnostics.DebuggerStepThroughAttribute()]
[System.ComponentModel.DesignerCategoryAttribute("code")]
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true, Namespace = "http://www.z.com")]
[System.Xml.Serialization.XmlRootAttribute(Namespace = "http://www.z.com", IsNullable = false)]
public partial class CaseA
{

    private Doc docField;

    /// <remarks/>
    [System.Xml.Serialization.XmlElementAttribute(Namespace = "http://www.a.com")]
    public DocuE DocE
    {
        get
        {
            return this.docEField;
        }
        set
        {
            this.docEField = value;
        }
    }
}

如何从Android Studio中的java中的另一个文件导入类？

2 个答案: