Android各種Adapter用法

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ArrayAdapter比較簡單，但它只能用於顯示文字。

 1 public class MainActivity extends AppCompatActivity { 2     private Spinner myspinner; 3     private ArrayList<String> mlist=new ArrayList<String>(); 4     private ArrayAdapter myadapter; 5     @Override 6     protected void onCreate(Bundle savedInstanceState) { 7         super.onCreate(savedInstanceState); 8         setContentView(R.layout.activity_main); 9         myspinner=(Spinner)findViewById(R.id.spinner);10         myadapter=new ArrayAdapter<String>(this,android.R.layout.select_dialog_item,getdata(mlist));11         myspinner.setAdapter(myadapter);12     }13     private ArrayList<String> getdata(ArrayList<String> mArrayList){14         mArrayList.add("ENGLISH");15         mArrayList.add("CHINA");16         return mArrayList;17     }

ArrayAdapter主函數

1   <Spinner2         android:id="@+id/spinner"3         android:layout_width="match_parent"4         android:layout_height="wrap_content"5         android:layout_weight="1" />

關於Spinner的xml布局

Context為當前的環境變數，TextViewResourceId為頁面配置，List<T>表示資料來源。

 

SimpleAdapter則有很強的擴充性，可以自訂出各種效果

 1 import android.support.v7.app.AppCompatActivity; 2 import android.os.Bundle; 3 import android.widget.SimpleAdapter; 4 import android.widget.Spinner; 5 import java.util.ArrayList; 6 import java.util.HashMap; 7 import java.util.List; 8  9 /**10  * @author LinJinTang11  */12 public class MainActivity extends AppCompatActivity {13     private Spinner myspinner;14     private SimpleAdapter mysimpleadapter;15     private List<HashMap<String,Object>> myhashmaps;16     private HashMap<String,Object> mymap;17 18     @Override19     protected void onCreate(Bundle savedInstanceState) {20         super.onCreate(savedInstanceState);21         setContentView(R.layout.activity_main);22         myspinner = (Spinner) findViewById(R.id.spinner);23         mysimpleadapter=new SimpleAdapter(this,getdata(),R.layout.spinner_layout,new String[]{"image","title","info"},new int[]{R.id.img,R.id.title,R.id.info});24         myspinner.setAdapter(mysimpleadapter);25     }26     private List<HashMap<String ,Object>> getdata(){27         myhashmaps=new ArrayList<HashMap<String, Object>>();28         mymap=new HashMap<String,Object>();29         mymap.put("image",R.drawable.img1);30         mymap.put("title","CHINA");31         mymap.put("info","I LIKE CHINA");32         myhashmaps.add(mymap);33 34         mymap=new HashMap<String,Object>();35         mymap.put("image",R.drawable.img2);36         mymap.put("title","FRANCE");37         mymap.put("info","I LIKE FRANCE");38         myhashmaps.add(mymap);39 40         mymap=new HashMap<String,Object>();41         mymap.put("image",R.drawable.img3);42         mymap.put("title","ENGLISH");43         mymap.put("info","I LIKE ENGLISH");44         myhashmaps.add(mymap);45     return myhashmaps;46     }47 }

SimpleAdapter函數代碼

 1 <?xml version="1.0" encoding="utf-8"?> 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 3     xmlns:app="http://schemas.android.com/apk/res-auto" 4     android:layout_width="match_parent" 5     android:layout_height="match_parent" 6     android:orientation="horizontal"> 7  8     <ImageView 9         android:id="@+id/img"10         android:layout_width="100dp"11         android:layout_height="80dp"12         app:srcCompat="@mipmap/ic_launcher" />13 14     <LinearLayout15         android:layout_width="match_parent"16         android:layout_height="match_parent"17         android:orientation="vertical">18 19         <TextView20             android:id="@+id/title"21             android:layout_width="match_parent"22             android:layout_height="50dp"23             android:textSize="20dp"24             android:gravity="center"25             android:text="TextView" />26 27         <TextView28             android:id="@+id/info"29             android:layout_width="match_parent"30             android:layout_height="30dp"31             android:gravity="center"32             android:text="TextView" />33     </LinearLayout>34 </LinearLayout>

SimpleApadter頁面配置代碼

 1 <?xml version="1.0" encoding="utf-8"?> 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 3     xmlns:app="http://schemas.android.com/apk/res-auto" 4     xmlns:tools="http://schemas.android.com/tools" 5     android:layout_width="match_parent" 6     android:layout_height="match_parent" 7     tools:context="angrypig.lookingstar.MainActivity"> 8  9 10     <Spinner11         android:id="@+id/spinner"12         android:layout_width="match_parent"13         android:layout_height="wrap_content"14         android:layout_weight="1" />15 </LinearLayout>

關於Spinner的xml布局

Context為當前的環境變數，TextViewResourceId為頁面配置，List<T>表示資料來源，Form對應map的Key，to對應的是布局檔案的Id。

Android各種Adapter用法