有人能指出我在这个SimpleAdapter中获取ImageView的正确方向吗? TAG_IMAGE应该是Imageview。 我得到这个:类型失配:无法从ImageView转换为int。 是的,我是一个菜鸟。
protected void onPostExecute(String file_url) {
// dismiss the dialog after getting all products
pDialog.dismiss();
// updating UI from Background Thread
runOnUiThread(new Runnable() {
public void run() {
/**
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(
AllProductsActivity.this, productsList,
R.layout.list_item, new String[] { TAG_PID,
TAG_NAME, TAG_PRICE, TAG_RANDOM, TAG_IMAGE },
new int[] { R.id.pid, R.id.name, R.id.price,
R.id.random, R.id.image });
// Imageview to show
// updating listview
setListAdapter(adapter);
}
});
答案 0 :(得分:15)
Main.xml,下面给出了代码
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/textview"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<ListView
android:id="@+id/listview"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
listview_layout.xml并使用下面给出的代码更新内容
<?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="horizontal"
>
<ImageView
android:id="@+id/flag"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:contentDescription="@string/hello"
android:paddingTop="10dp"
android:paddingRight="10dp"
android:paddingBottom="10dp"
/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
>
<TextView
android:id="@+id/txt"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="15dp"
/>
<TextView
android:id="@+id/cur"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="10dp"
/>
</LinearLayout>
</LinearLayout>
MainActivity.java,下面给出代码
package com.example.list;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import android.app.Activity;
import android.os.Bundle;
import android.widget.ListView;
import android.widget.SimpleAdapter;
public class MainActivity extends Activity {
// Array of strings storing country names
String[] countries = new String[] {
"India",
"Pakistan",
"Sri Lanka",
"China",
"Bangladesh",
"Nepal",
"Afghanistan",
"North Korea",
"South Korea",
"Japan"
};
// Array of integers points to images stored in /res/drawable-ldpi/
int[] flags = new int[]{
R.drawable.india,
R.drawable.pakistan,
R.drawable.srilanka,
R.drawable.china,
R.drawable.bangladesh,
R.drawable.nepal,
R.drawable.afghanistan,
R.drawable.nkorea,
R.drawable.skorea,
R.drawable.japan
};
// Array of strings to store currencies
String[] currency = new String[]{
"Indian Rupee",
"Pakistani Rupee",
"Sri Lankan Rupee",
"Renminbi",
"Bangladeshi Taka",
"Nepalese Rupee",
"Afghani",
"North Korean Won",
"South Korean Won",
"Japanese Yen"
};
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// Each row in the list stores country name, currency and flag
List<HashMap<String,String>> aList = new ArrayList<HashMap<String,String>>();
for(int i=0;i<10;i++){
HashMap<String, String> hm = new HashMap<String,String>();
hm.put("txt", "Country : " + countries[i]);
hm.put("cur","Currency : " + currency[i]);
hm.put("flag", Integer.toString(flags[i]) );
aList.add(hm);
}
// Keys used in Hashmap
String[] from = { "flag","txt","cur" };
// Ids of views in listview_layout
int[] to = { R.id.flag,R.id.txt,R.id.cur};
// Instantiating an adapter to store each items
// R.layout.listview_layout defines the layout of each item
SimpleAdapter adapter = new SimpleAdapter(getBaseContext(), aList, R.layout.listview_layout, from, to);
// Getting a reference to listview of main.xml layout file
ListView listView = ( ListView ) findViewById(R.id.listview);
// Setting the adapter to the listView
listView.setAdapter(adapter);
}
}
运行应用程序