Question

在我们的项目中，对于listview项目，它将链接到相同的内容。但是我们需要为所有listview项目提供不同的活动。例如：如果我们单击History listview，它将打开相关的历史记录活动。。但是所有listview项目的相同历史活动都是开放的.plz有助于解决。

java代码：

import android.app.ListActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;

public class OurSchool extends ListActivity{

 String[] listItems={"History", "Mission And Objectives", "Principals Forewords", "School System", 
         "Calender", "Rules And Regulations", "Our Traditional", "Our Alumini Council","Our Pholosophy","Our Branches"};
 boolean[] listImages= {true, true, true, true, true,true, true, true, true, true};


    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.our_school);
        setListAdapter(new ImageAdapter(this, R.layout.our_school, R.id.text1, R.id.image1, listItems, listImages ));
        this.getListView().setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                    final int pos, long id) {
                Intent i = new Intent(getApplicationContext(), History.class);
                String product = null;
                // sending data to new activity
                i.putExtra("product", product);
                startActivity(i);
            }
        });

    }


    }

History.java：

    import android.app.Activity;
import android.os.Bundle;
import android.webkit.WebView;

public class History extends Activity {

    WebView mWebView;
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.history);   

        mWebView = (WebView)findViewById(R.id.webview);
        mWebView.setBackgroundColor(0);
        mWebView.setBackgroundResource(R.drawable.bg);
        mWebView.getSettings().setBuiltInZoomControls(true);
        mWebView.loadUrl("file:///android_asset/History.html");     

    }
}

history.xml：

<?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="vertical" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:layout_gravity="center"
        android:text="About :LITTLE FLOWERS PUBLIC SCHOOL"
        android:textAppearance="?android:attr/textAppearanceLarge" />

    <WebView
        android:id="@+id/webview"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" />


</LinearLayout>

谢谢，

Answer 1

您需要将listViewItem Position传递给NextActivity。

 @Override
        public void onItemClick(AdapterView<?> parent, View view,
                final int pos, long id) {
            Intent i = new Intent(getApplicationContext(), History.class);
            // sending data to new activity
            i.putExtra("pos", pos);
            startActivity(i);
        }

然后你的nextActivity看起来像

public class History extends Activity {

WebView mWebView;
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.history);   

    int pos = getIntent().getIntExtra("pos",0);      

    mWebView = (WebView)findViewById(R.id.webview);
    mWebView.setBackgroundColor(0);
    mWebView.setBackgroundResource(R.drawable.bg);
    mWebView.getSettings().setBuiltInZoomControls(true);
    switch (pos) {
    case 0:
        mWebView.loadUrl("file:///android_asset/History.html");
        break;
    case 1:
        mWebView.loadUrl("file:///android_asset/Objective.html");
        break;
    case 2:
        mWebView.loadUrl("file:///android_asset/Principles.html");
        break;
    case 3:
        mWebView.loadUrl("file:///android_asset/Calender.html");
        break;
    case 4:
        mWebView.loadUrl("file:///android_asset/ShcoolSystem.html");
        break;

    default:
        mWebView.loadUrl("file:///android_asset/History.html");
        break;
    }    

  }
 }

Answer 2

您可能需要稍微更改一下逻辑。在目前的代码中，您只在Intent中使用History.class。这就是为什么它为每个列表项开放。您可能必须根据单击的项目更改类名称。

例如

String item = (String)parent.getItemAtPosition(position);
Intent i;
if(item.equals("History")
  {
  i = new Intent(getApplicationContext(), History.class);
  } 
  else if("Mission And Objectives")
  { i = new Intent(getApplicationContext(), AnotherClass.class);}

android中的listview：它应用于所有listview项目的一个活动

2 个答案: