- 首先，我們先為三種不同的AdapterView建立共同使用來顯示資料的Layout： my_base_adapter_layout.xml:
- 在這裡，我在res資料夾中設置了arrays.xml，紀錄了圖片資源的名稱:
- 再來，為展示三種不同AdapterView的Activity建立它們各自的Layout，其中都各自在右下角有一個按鈕，用來切換到不同的Activity： ListView的layout，activity_listview.xml:
- 最後，我們建立三個極為相似的Activity用來顯示不同的AdapterView，為了避免過多不重要的程式碼影響閱讀，這裡只寫出Activity中onCreate()方法中的程式碼：
- 可以看到這三個Activity內的程式碼基本上沒有區別，只差在finvViewById得到的不同AdapterView還有在setAdapter()中的getView()裡getLayoutInflater().inflate()所給的Layout參數不同而已，最後的成品如下面影片所示:
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="horizontal" android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center_vertical"> <ImageView android:layout_width="50dp" android:layout_height="50dp" android:id="@+id/imageView" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:textAppearance="?android:attr/textAppearanceLarge" android:text="Large Text" android:id="@+id/textView" /> </LinearLayout>
<?xml version="1.0" encoding="utf-8"?> <resources> <string-array name="pictrueNames"> <item>菊花</item> <item>沙漠</item> <item>繡球花</item> <item>水母</item> </string-array> </resources>
<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" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity"> <ListView android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/listView" android:layout_centerHorizontal="true" android:layout_above="@+id/listviewLinearLayout" /> <RelativeLayout android:orientation="horizontal" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:id="@+id/listviewLinearLayout"> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Spinner示範" android:id="@+id/spinnerButton" android:layout_alignParentTop="true" android:layout_alignParentRight="true" android:layout_alignParentEnd="true" /> </RelativeLayout> </RelativeLayout>Spinner的layout，activity_lspinner.xml:
<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" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" android:paddingBottom="@dimen/activity_vertical_margin" tools:context="com.example.gjun.AdapterViews_example.SpinnerActivity"> <Spinner android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/spinner" android:layout_alignParentTop="true" android:layout_alignParentLeft="true" android:layout_alignParentStart="true" />
<RelativeLayout android:orientation="horizontal" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:id="@+id/spinnerLinearLayout"> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Gallery示範" android:id="@+id/galleryButton" android:layout_alignParentTop="true" android:layout_alignParentRight="true" android:layout_alignParentEnd="true" /> </RelativeLayout> </RelativeLayout>Gallery的layout，activity_gallery.xml:
<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" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" android:paddingBottom="@dimen/activity_vertical_margin" tools:context="com.example.gjun.AdapterViews_example.GalleryActivity" android:gravity="center"> <Gallery android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/gallery" android:layout_alignParentLeft="true" android:layout_alignParentStart="true" android:spacing="60dp" android:layout_above="@+id/spinerLinearLayout" /> <RelativeLayout android:orientation="horizontal" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:id="@+id/spinerLinearLayout"> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="ListView示範" android:id="@+id/listViewButton" android:layout_alignParentTop="true" android:layout_alignParentRight="true" android:layout_alignParentEnd="true" /> </RelativeLayout> </RelativeLayout>
ListViewActivity.java：
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_listview);
final String[] pictureNames = getResources().getStringArray(R.array.pictrueNames);
final int[] pictureResourceIds = new int[]{R.drawable.chrysanthemum, R.drawable.desert, R.drawable.hydrangeas, R.drawable.jellyfish};
ListView listView = (ListView) findViewById(R.id.listView);
listView.setAdapter(new BaseAdapter() {
@Override
public int getCount() {
return pictureNames.length;
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
LinearLayout my_base_adapter_layout = (LinearLayout) getLayoutInflater().inflate(R.layout.my_base_adapter_layout,null);
ImageView imageView = (ImageView) my_base_adapter_layout.findViewById(R.id.imageView);
TextView textView = (TextView) my_base_adapter_layout.findViewById(R.id.textView);
imageView.setImageResource(pictureResourceIds[position]);
textView.setText(pictureNames[position]);
return my_base_adapter_layout;
}
});
Button spinnerButton = (Button) findViewById(R.id.spinnerButton);
spinnerButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(ListViewActivity.this,SpinnerActivity.class);
startActivity(intent);
}
});
SpinnerActivity.java：@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_spinner);
final String[] pictureNames = getResources().getStringArray(R.array.pictrueNames);
final int[] pictureResourceIds = new int[]{R.drawable.chrysanthemum, R.drawable.desert, R.drawable.hydrangeas, R.drawable.jellyfish};
Spinner spinner = (Spinner) findViewById(R.id.spinner);
spinner.setAdapter(new BaseAdapter() {
@Override
public int getCount() {
return pictureNames.length;
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
LinearLayout my_base_adapter_layout = (LinearLayout) getLayoutInflater().inflate(R.layout.my_base_adapter_layout,null);
ImageView imageView = (ImageView) my_base_adapter_layout.findViewById(R.id.imageView);
TextView textView = (TextView) my_base_adapter_layout.findViewById(R.id.textView);
imageView.setImageResource(pictureResourceIds[position]);
textView.setText(pictureNames[position]);
return my_base_adapter_layout;
}
});
Button galleryButton = (Button) findViewById(R.id.galleryButton);
galleryButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(SpinnerActivity.this,GalleryActivity.class);
startActivity(intent);
}
});
GalleryActivity.java：@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_gallery);
final String[] pictureNames = getResources().getStringArray(R.array.pictrueNames);
final int[] pictureResourceIds = new int[]{R.drawable.chrysanthemum, R.drawable.desert, R.drawable.hydrangeas, R.drawable.jellyfish};
Gallery gallery = (Gallery) findViewById(R.id.gallery);
gallery.setAdapter(new BaseAdapter() {
@Override
public int getCount() {
return pictureNames.length;
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
LinearLayout my_base_adapter_layout = (LinearLayout) getLayoutInflater().inflate(R.layout.my_base_adapter_layout,null);
ImageView imageView = (ImageView) my_base_adapter_layout.findViewById(R.id.imageView);
TextView textView = (TextView) my_base_adapter_layout.findViewById(R.id.textView);
imageView.setImageResource(pictureResourceIds[position]);
textView.setText(pictureNames[position]);
return my_base_adapter_layout;
}
});
Button listViewButton = (Button) findViewById(R.id.listViewButton);
listViewButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(GalleryActivity.this,ListViewActivity.class);
startActivity(intent);
}
});
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