Question

我输了，所以我可以请一些关于如何将列表项链接到单独的活动的帮助吗？我只是希望能够在点击行时执行操作，并且数据是行包含任何想法吗？谢谢 main.java：

package com.sevenhack;
import java.util.List;
import android.app.Activity;
import android.app.ListActivity;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
public class Main extends ListActivity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        setListAdapter(new MyAdapter(this, 
                android.R.layout.simple_list_item_1, R.id.textView1,
                getResources().getStringArray(R.array.itemlist)));
    }

private class MyAdapter extends ArrayAdapter<String> {

    public MyAdapter(Context context, int resource, int textViewResourceId,
            String[] strings) {
        super(context, resource, textViewResourceId, strings);
        // TODO Auto-generated constructor stub
    }
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View row = inflater.inflate(R.layout.itemlist, parent , false);
        String[] items = getResources().getStringArray(R.array.itemlist);
        ImageView iv = (ImageView) row.findViewById(R.id.imageView1);
        TextView tv = (TextView) row.findViewById(R.id.textView1);
        tv.setText(items[position]);



        return row;
    }

}

}

布局＆GT; itemlist.xml：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" android:layout_marginTop="100dp"
    >


<ImageView
    android:id="@+id/imageView1"
    android:layout_width="40dp"
    android:layout_height="40dp"
    android:layout_alignParentRight="true"
    android:layout_alignParentTop="true" android:src="@drawable/ic_securee"/>

<TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignBottom="@+id/imageView1"
    android:layout_toLeftOf="@+id/imageView1"
    android:text="Large Text" android:layout_marginBottom="10dp"    
    android:layout_marginRight="5dp" android:textSize="20dp"/>

</RelativeLayout>

感谢。

Answer 1

您需要实施onListItemClick(....)。您可以在Activity。

中直接覆盖此方法

  @Override
    protected void onListItemClick(ListView l, View v, int position, long id)          
  {
     super.onListItemClick(l, v, position, id);

    // ListView Clicked item index
    int itemPosition=position;

     // ListView Clicked item value
   String  itemValue=(String)l.getItemAtPosition(position);

   Toast.makeText(yourActivity.this,"Click :Position :"+itemPosition+"ListItem : " +itemValue,Toast.LENGTH_SHORT).show();;

    }

点击list item后，调用onItemClick中的ListView Item Click Listener方法然后传递您Intent中的选定值。

Answer 2

您想要做的是以下内容：

1。）实现ListActivity的onListItemClick函数。

@Override
public void onListItemClick(ListView l, View v, int position, long id)
{
   super.onListItemClick(l, v, position, id);
   MyItem myItem = (MyItem) this.getListAdapter().getItem(position);
   ... //will need to add more things here
}

2。）你的MyItem＆＃39; class必须实现Parcelable接口。这可以使用Parcelabler自动执行，此处为：http://www.parcelabler.com/

3。）将项目发送到意图中的新活动。

Intent intent = new Intent(this, OtherActivity.class);
intent.putExtra("argument", myItem);
startActivity(intent);

4.。）在你的其他活动中，从意图中获取Parcelable。

public class OtherActivity extends Activity
{
   private MyItem myItem;

   @Override
   public void onCreate(Bundle onSaveInstance)
   {
      super.onCreate(onSaveInstance);
      this.myItem = (MyItem) getIntent().getExtras().getParcelable("argument");
      ...
   }
}

5.。）对其他活动中的项目执行您想要的操作，例如显示其数据。为此，指定布局XML，并在onCreate（...）函数中按ID查找视图，并根据Intent中收到的项设置其参数。

编辑：这是我根据你的东西放在一起的样本：

public class MyListActivity extends ListActivity
{
   /** Called when the activity is first created. */
   @Override
   public void onCreate(Bundle savedInstanceState)
   {
      super.onCreate(savedInstanceState);
      setListAdapter(new MyAdapter(this, R.layout.itemlist, R.id.textView1, getResources()
            .getStringArray(R.array.hello_world)));
   }

   @Override
   public void onListItemClick(ListView l, View v, int position, long id)
   {
      super.onListItemClick(l, v, position, id);
      String myItem = (String) this.getListAdapter().getItem(position);
      Intent intent = new Intent(this, OtherActivity.class);
      intent.putExtra("hello", myItem);
      startActivity(intent);
   }

   private class MyAdapter extends ArrayAdapter<String>
   {

      public MyAdapter(Context context, int resource, int textViewResourceId, String[] strings)
      {
         super(context, resource, textViewResourceId, strings);
         // TODO Auto-generated constructor stub
      }

      @Override
      public View getView(int position, View convertView, ViewGroup parent)
      {
         LayoutInflater inflater = (LayoutInflater)     getSystemService(Context.LAYOUT_INFLATER_SERVICE);
         View row = inflater.inflate(R.layout.itemlist, parent, false);
         String[] items = getResources().getStringArray(R.array.hello_world);
         TextView tv = (TextView) row.findViewById(R.id.textView1);
         tv.setText(items[position]);

         return row;
      }
   }
}

下一步：

public class OtherActivity extends Activity
{
   @Override
   protected void onCreate(Bundle savedInstanceState)
   {
      super.onCreate(savedInstanceState);
      String data = getIntent().getExtras().getString("hello");
      System.out.println(data);
   }
}

/res/values/array.xml：

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string-array name="hello_world">
        <item name="hello">Hello</item>
        <item name="world">World</item>
    </string-array>
</resources>

/res/layout/itemlist.xml：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" android:layout_marginTop="100dp"
    >

<TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginBottom="10dp"    
    android:layout_marginRight="5dp" android:textSize="20dp"/>

</RelativeLayout>

的AndroidManifest.xml：

<?xml version="1.0" encoding="utf-8"?>
    <manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.exa.ex.testproject"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="19" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.exa.ex.testproject.MyListActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name="com.example.exa.ex.testproject.OtherActivity"
            android:label="@string/app_name" >
        </activity>
    </application>

</manifest>

我有一个listview如何将其连接到另一个活动

2 个答案: