【Android基础入门〖8〗】SimpleAdapter之一
2013-11-03 09:49
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目录(?)[+]
SimpleAdapter
listItem 中存放所有要显示的所有列数据,每 new 一个map,即 在显示的列表中 新建一行数据,Title (自定义)、Image(自定义) 只是别名,分别对应 每一行的布局 item_layout 中的 资源 ID , Title => R.id.item_text,Image => R.id.item_image。
package com.michael.training;
import java.util.ArrayList;
import java.util.HashMap;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_layout);
ListView listView = (ListView)findViewById(R.id.mListView);
ArrayList<HashMap<String, Object>> listItem = new ArrayList<HashMap<String, Object>>();
HashMap<String, Object> map = new HashMap<String, Object>();
map.put("Title", "NO.1 开发环境搭建");
map.put("Image", R.drawable.item);
listItem.add(map);
map = null;
map = new HashMap<String, Object>();
map.put("Title", "NO.2 四大组件");
map.put("Image", R.drawable.item);
listItem.add(map);
SimpleAdapter listAdapter = new SimpleAdapter( this,
listItem,
R.layout.item_layout,
new String[] {"Title", "Image"},
new int[] {R.id.item_text,R.id.item_img});
listView.setAdapter(listAdapter);
listView.setOnItemClickListener(listener);
}
OnItemClickListener listener=new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,long arg3) {
Toast.makeText(getApplicationContext(),((Integer)arg2).toString()+"-----"+((Integer)arg2).toString(), Toast.LENGTH_SHORT).show();
}
};
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
只放了个ListView。
<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 = ".MainActivity" >
<ListView
android:id = "@+id/mListView"
android:layout_width = "match_parent"
android:layout_height = "match_parent" />
</RelativeLayout>
即ListView中每一行显示的布局,我定义了一个图片和一个文本。
<? 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 = "match_parent"
android:layout_gravity = "center_vertical" xmlns:tools = "http://schemas.android.com/tools" tools:ignore = "HardcodedText" >
<ImageView
android:id = "@+id/item_img"
android:layout_width = "wrap_content"
android:layout_height = "wrap_content"
android:layout_alignParentTop = "true"
android:layout_marginLeft = "10dp"
android:src = "@drawable/item"
android:contentDescription = "imageflag" />
<TextView
android:id = "@+id/item_text"
android:layout_width = "wrap_content"
android:layout_height = "wrap_content"
android:layout_alignBottom = "@+id/item_img"
android:layout_alignParentRight = "true"
android:layout_alignParentTop = "true"
android:layout_marginTop = "4dp"
android:layout_marginLeft = "24dp"
android:layout_toRightOf = "@+id/item_img"
android:gravity = "center_vertical"
android:text = "环境搭建"
android:textStyle = "bold" />
</RelativeLayout>
转载请注明出处!http://blog.csdn.net/mkrcpp/article/details/9792191
SimpleAdapter
Activity
主程序listItem 中存放所有要显示的所有列数据,每 new 一个map,即 在显示的列表中 新建一行数据,Title (自定义)、Image(自定义) 只是别名,分别对应 每一行的布局 item_layout 中的 资源 ID , Title => R.id.item_text,Image => R.id.item_image。
package com.michael.training;
import java.util.ArrayList;
import java.util.HashMap;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_layout);
ListView listView = (ListView)findViewById(R.id.mListView);
ArrayList<HashMap<String, Object>> listItem = new ArrayList<HashMap<String, Object>>();
HashMap<String, Object> map = new HashMap<String, Object>();
map.put("Title", "NO.1 开发环境搭建");
map.put("Image", R.drawable.item);
listItem.add(map);
map = null;
map = new HashMap<String, Object>();
map.put("Title", "NO.2 四大组件");
map.put("Image", R.drawable.item);
listItem.add(map);
SimpleAdapter listAdapter = new SimpleAdapter( this,
listItem,
R.layout.item_layout,
new String[] {"Title", "Image"},
new int[] {R.id.item_text,R.id.item_img});
listView.setAdapter(listAdapter);
listView.setOnItemClickListener(listener);
}
OnItemClickListener listener=new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,long arg3) {
Toast.makeText(getApplicationContext(),((Integer)arg2).toString()+"-----"+((Integer)arg2).toString(), Toast.LENGTH_SHORT).show();
}
};
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
main_layout.xml
主页面布局只放了个ListView。
<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 = ".MainActivity" >
<ListView
android:id = "@+id/mListView"
android:layout_width = "match_parent"
android:layout_height = "match_parent" />
</RelativeLayout>
item_layout.xml
item布局即ListView中每一行显示的布局,我定义了一个图片和一个文本。
<? 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 = "match_parent"
android:layout_gravity = "center_vertical" xmlns:tools = "http://schemas.android.com/tools" tools:ignore = "HardcodedText" >
<ImageView
android:id = "@+id/item_img"
android:layout_width = "wrap_content"
android:layout_height = "wrap_content"
android:layout_alignParentTop = "true"
android:layout_marginLeft = "10dp"
android:src = "@drawable/item"
android:contentDescription = "imageflag" />
<TextView
android:id = "@+id/item_text"
android:layout_width = "wrap_content"
android:layout_height = "wrap_content"
android:layout_alignBottom = "@+id/item_img"
android:layout_alignParentRight = "true"
android:layout_alignParentTop = "true"
android:layout_marginTop = "4dp"
android:layout_marginLeft = "24dp"
android:layout_toRightOf = "@+id/item_img"
android:gravity = "center_vertical"
android:text = "环境搭建"
android:textStyle = "bold" />
</RelativeLayout>
成果
转载请注明出处!http://blog.csdn.net/mkrcpp/article/details/9792191
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