android基础-AdapterView及子类

1.AdapterView及子类

1.1 列表视图（ListView）和ListActivity

1.2 Adapter接口及实现类

1.3 自动完成文本框（AutoCompleteTextView）的功能和用法

public class MainActivity extends AppCompatActivity {
    AutoCompleteTextView actv;
    MultiAutoCompleteTextView mauto;
    // 定义字符串数组，作为提示的文本
    String[] books = new String[]{
            "Java讲义",
            "Ajax讲义",
            "XML讲义",
    };
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        // 创建一个ArrayAdapter，封装数组
        ArrayAdapter<String> aa = new ArrayAdapter<String>(this,
                android.R.layout.simple_dropdown_item_1line, books);
        actv = (AutoCompleteTextView)findViewById(R.id.auto);
        // 设置Adapter
        actv.setAdapter(aa);
        mauto = (MultiAutoCompleteTextView)findViewById(R.id.mauto);
        // 设置Adapter
        mauto.setAdapter(aa);
        // 为MultiAutoCompleteTextView设置分隔符
        mauto.setTokenizer(new MultiAutoCompleteTextView.CommaTokenizer());
    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <!-- 定义一个自动完成文本框，
        指定输入一个字符后进行提示 -->
    <AutoCompleteTextView
        android:id="@+id/auto"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:completionHint="请选择您喜欢的图书："
        android:dropDownHorizontalOffset="10dp"
        android:completionThreshold="1"/>
    <!-- 定义一个MultiAutoCompleteTextView组件 -->
    <MultiAutoCompleteTextView
        android:id="@+id/mauto"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:completionThreshold="1"/>
</LinearLayout>

1.4 可展开的列表组件（ExpandableListView）

public class MainActivity extends AppCompatActivity {
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //创建一个BaseExpandableListAdapter对象
        ExpandableListAdapter adapter = new BaseExpandableListAdapter()
        {
            int[] logos = new int[]
                    {
                            R.drawable.p,
                            R.drawable.z,
                            R.drawable.t
                    };
            private String[] armTypes = new String[]
                    { "神族兵种", "虫族兵种", "人族兵种"};
            private String[][] arms = new String[][]
                    {
                            { "狂战士", "龙骑士", "黑暗圣堂", "电兵" },
                            { "小狗", "刺蛇", "飞龙", "自爆飞机" },
                            { "机枪兵", "护士MM" , "幽灵" }
                    };
            // 获取指定组位置、指定子列表项处的子列表项数据
            @Override
            public Object getChild(int groupPosition, int childPosition)
            {
                return arms[groupPosition][childPosition];
            }
            @Override
            public long getChildId(int groupPosition, int childPosition)
            {
                return childPosition;
            }
            @Override
            public int getChildrenCount(int groupPosition)
            {
                return arms[groupPosition].length;
            }
            private TextView getTextView()
            {
                AbsListView.LayoutParams lp = new AbsListView.LayoutParams(
                        ViewGroup.LayoutParams.MATCH_PARENT, 64);
                TextView textView = new TextView(MainActivity.this);
                textView.setLayoutParams(lp);
                textView.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT);
                textView.setPadding(36, 0, 0, 0);
                textView.setTextSize(20);
                return textView;
            }
            // 该方法决定每个子选项的外观
            @Override
            public View getChildView(int groupPosition, int childPosition,
                                     boolean isLastChild, View convertView, ViewGroup parent)
            {
                TextView textView = getTextView();
                textView.setText(getChild(groupPosition, childPosition)
                        .toString());
                return textView;
            }
            // 获取指定组位置处的组数据
            @Override
            public Object getGroup(int groupPosition)
            {
                return armTypes[groupPosition];
            }
            @Override
            public int getGroupCount()
            {
                return armTypes.length;
            }
            @Override
            public long getGroupId(int groupPosition)
            {
                return groupPosition;
            }
            // 该方法决定每个组选项的外观
            @Override
            public View getGroupView(int groupPosition, boolean isExpanded,
                                     View convertView, ViewGroup parent)
            {
                LinearLayout ll = new LinearLayout(MainActivity.this);
                ll.setOrientation(0);
                ImageView logo = new ImageView(MainActivity.this);
                logo.setImageResource(logos[groupPosition]);
                ll.addView(logo);
                TextView textView = getTextView();
                textView.setText(getGroup(groupPosition).toString());
                ll.addView(textView);
                return ll;
            }
            @Override
            public boolean isChildSelectable(int groupPosition,
                                             int childPosition)
            {
                return true;
            }
            @Override
            public boolean hasStableIds()
            {
                return true;
            }
        };
        ExpandableListView expandListView = (ExpandableListView) findViewById(R.id.list);
        expandListView.setAdapter(adapter);
    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <ExpandableListView
        android:id="@+id/list"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:childIndicator="@mipmap/ic_launcher"/>
</LinearLayout>

1.5 Sppinner的功能和用法

public class MainActivity extends AppCompatActivity {
    Spinner spinner;
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        // 获取界面布局文件中的Spinner组件
        spinner = (Spinner) findViewById(R.id.spinner);
        String[] arr = { "孙悟空", "猪八戒", "唐僧" };
        // 创建ArrayAdapter对象
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_multiple_choice, arr);
        // 为Spinner设置Adapter
        spinner.setAdapter(adapter);
    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <!-- 定义了一个Spinner组件，
        指定显示该Spinner组件的数组 -->
    <Spinner
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:entries="@array/books"
        android:prompt="@string/tip"/>
    <Spinner
        android:id="@+id/spinner"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:prompt="@string/tip"/>
</LinearLayout>

1.6 AdapterViewFlipper的功能和用法

public class MainActivity extends AppCompatActivity {
    int[] imageIds = new int[]
            {
                    R.drawable.shuangzi, R.drawable.shuangyu,
                    R.drawable.chunv, R.drawable.tiancheng, R.drawable.tianxie,
                    R.drawable.sheshou, R.drawable.juxie, R.drawable.shuiping,
                    R.drawable.shizi, R.drawable.baiyang, R.drawable.jinniu,
                    R.drawable.mojie };
    private AdapterViewFlipper flipper;
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        flipper = (AdapterViewFlipper) findViewById(R.id.flipper);
        // 创建一个BaseAdapter对象，该对象负责提供Gallery所显示的列表项
        BaseAdapter adapter = new BaseAdapter()
        {
            @Override
            public int getCount()
            {
                return imageIds.length;
            }
            @Override
            public Object getItem(int position)
            {
                return position;
            }
            @Override
            public long getItemId(int position)
            {
                return position;
            }
            // 该方法返回的View代表了每个列表项
            @Override
            public View getView(int position, View convertView, ViewGroup parent)
            {
                // 创建一个ImageView
                ImageView imageView = new ImageView(MainActivity.this);
                imageView.setImageResource(imageIds[position]);
                // 设置ImageView的缩放类型
                imageView.setScaleType(ImageView.ScaleType.FIT_XY);
                // 为imageView设置布局参数
                imageView.setLayoutParams(new ViewGroup.LayoutParams(
                        ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
                return imageView;
            }
        };
        flipper.setAdapter(adapter);
    }
    public void prev(View source)
    {
        // 显示上一个组件
        flipper.showPrevious();
        // 停止自动播放
        flipper.stopFlipping();
    }
    public void next(View source)
    {
        // 显示下一个组件。
        flipper.showNext();
        // 停止自动播放
        flipper.stopFlipping();
    }
    public void auto(View source)
    {
        // 开始自动播放
        flipper.startFlipping();
    }
}

<?xml version="1.0" encoding="utf-8" ?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <AdapterViewFlipper
        android:id="@+id/flipper"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:flipInterval="5000"
        android:layout_alignParentTop="true"/>
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:onClick="prev"
        android:text="上一个"/>
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:onClick="next"
        android:text="下一个"/>
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentRight="true"
        android:onClick="auto"
        android:text="自动播放"/>
</RelativeLayout>

代码下载地址

1.7 StackView的功能和用法

public class MainActivity extends AppCompatActivity {
    StackView stackView;
    int[] imageIds = new int[]
            {
                    R.drawable.bomb5 , R.drawable.bomb6 , R.drawable.bomb7
                    , R.drawable.bomb8 , R.drawable.bomb9 , R.drawable.bomb10
                    , R.drawable.bomb11 , R.drawable.bomb12 , R.drawable.bomb13
                    , R.drawable.bomb14 , R.drawable.bomb15 , R.drawable.bomb16
            };
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        stackView = (StackView) findViewById(R.id.mStackView);
        // 创建一个List对象，List对象的元素是Map
        List<Map<String, Object>> listItems =
                new ArrayList<Map<String, Object>>();
        for (int i = 0; i < imageIds.length; i++)
        {
            Map<String, Object> listItem = new HashMap<String, Object>();
            listItem.put("image", imageIds[i]);
            listItems.add(listItem);
        }
        // 创建一个SimpleAdapter
        SimpleAdapter simpleAdapter = new SimpleAdapter(this,
                listItems
                // 使用/layout/cell.xml文件作为界面布局
                , R.layout.cell, new String[] { "image" },
                new int[] { R.id.image1 });
        stackView.setAdapter(simpleAdapter);
    }
    public void prev(View view)
    {
        // 显示上一个组件
        stackView.showPrevious();
    }
    public void next(View view)
    {
        // 显示下一个组件
        stackView.showNext();
    }
}

<?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">
    <StackView
        android:id="@+id/mStackView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:loopViews="true" />
    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="上一个"
            android:onClick="prev"/>
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="下一个"
            android:onClick="next"/>
    </LinearLayout>
</LinearLayout>