GridView、AutoTextView、Spinner、Gallery、ExpandableListView

GridView的案例

MainActivity

public class MainActivity extends AppCompatActivity {private GridView mGridView;    private LayoutInflater mInflater;    private List<Fruit> mFruits;    private MyGirdAdapter mAdapter;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        mGridView= (GridView) findViewById(R.id.gridview);        mInflater=getLayoutInflater();//mInflater有多种获取方式        mFruits=new ArrayList<>();        mAdapter=new MyGirdAdapter(mInflater,mFruits);        mGridView.setAdapter(mAdapter);        for(int i=0;i<10;i++) {            Fruit apple = new Fruit("菠萝", R.mipmap.pineapple);            Fruit peach = new Fruit("桃子", R.mipmap.peach);            Fruit banana = new Fruit("香蕉", R.mipmap.fbanana);            Fruit strawberry = new Fruit("草莓", R.mipmap.fstrawberry);            mFruits.add(apple);            mFruits.add(banana);            mFruits.add(strawberry);            mFruits.add(peach);        }    }

MyGridAdapter

public class MyGriAdapter extends BaseAdapter {    private List<Fruit> mFruits;    private LayoutInflater mInflater;    public MyGirdAdapter( LayoutInflater Inflater,List<Fruit> Fruits) {        mFruits = Fruits;       mInflater = Inflater;    }    @Override    public int getCount() {        return mFruits.size();    }    @Override    public Object getItem(int position) {        return position;    }    @Override    public long getItemId(int position) {        return position;    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {        ViewHolder viewHolder=null;        if(convertView==null){            convertView=mInflater.inflate(R.layout.item_gird,null);            viewHolder=new ViewHolder();            viewHolder.textView= (TextView) convertView.findViewById(R.id.textview);            viewHolder.imageView= (ImageView) convertView.findViewById(R.id.imageview);            convertView.setTag(viewHolder);        }else{            viewHolder= (ViewHolder) convertView.getTag();        }        Fruit fruit=mFruits.get(position);        viewHolder.textView.setText(fruit.getName());        viewHolder.imageView.setImageResource(fruit.getImg());        return convertView;    }    class ViewHolder{        TextView textView;        ImageView imageView;    }}

activity_main.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=".MainActivity"><GridView    android:id="@+id/gridview"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:numColumns="3"></GridView></RelativeLayout>

item_gird.xml

<?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"><TextView    android:id="@+id/textview"    android:layout_width="wrap_content"    android:layout_height="wrap_content" />    <ImageView        android:id="@+id/imageview"        android:layout_width="100dp"        android:layout_height="100dp"        android:src="@mipmap/pineapple"/></LinearLayout>

运行图

>

AutoTextView案例

MainActivity

public class MainActivity extends AppCompatActivity {    private AutoCompleteTextView mAutoTextView;    private ArrayAdapter<String> mAdapter;    private String [] mData={"layout_linear","layout_relative","layout_frame","view_text","view_image","view_button","editView","peach","pineapple"};    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        mAutoTextView= (AutoCompleteTextView) findViewById(R.id.auto_textview);        mAdapter=new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,mData);        mAutoTextView.setAdapter(mAdapter);    }

activity_main.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=".MainActivity">    <AutoCompleteTextView        android:id="@+id/auto_textview"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:hint="search"/></RelativeLayout>

运行图

Spinner案例

MainActivity

public class MainActivity extends AppCompatActivity {private Spinner mSpinner;    private ArrayAdapter<String > mAdapter;    private String [] mData={"layout_linear","layout_relative","layout_frame","view_text","view_image","view_button","editView","peach","pineapple"};    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        mSpinner= (Spinner) findViewById(R.id.spinner);       mAdapter=new ArrayAdapter<String>(this,android.R.layout.simple_dropdown_item_1line,mData);       mSpinner.setAdapter(mAdapter);    }

activity_main.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=".MainActivity">    <Spinner        android:id="@+id/spinner"        android:layout_width="match_parent"        android:layout_height="wrap_content">    </Spinner></RelativeLayout>

运行图

Gallery案例

MainActivity

public class MainActivity extends AppCompatActivity {    private Gallery mGallery;    private LayoutInflater mInflater;    private List<Fruit> mFruits;    private MyGalleryAdapter mAdapter;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);      setContentView(R.layout.activity_main);        mGallery= (Gallery) findViewById(R.id.gallery);        mInflater=getLayoutInflater();//mInflater有多种获取方式        mFruits=new ArrayList<>();        for(int i=0;i<10;i++) {            Fruit apple = new Fruit("菠萝", R.mipmap.pineapple);            Fruit peach = new Fruit("桃子", R.mipmap.peach);            Fruit banana = new Fruit("香蕉", R.mipmap.fbanana);            Fruit strawberry = new Fruit("草莓", R.mipmap.fstrawberry);            mFruits.add(apple);            mFruits.add(banana);            mFruits.add(strawberry);            mFruits.add(peach);        }        mAdapter=new MyGalleryAdapter(mInflater,mFruits);        mGallery.setAdapter(mAdapter);        mGallery.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {            @Override            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {                Log.d("mygallery","onItemSelected"+mFruits.get(position).getName());//得到居中位置上的图片的名称            }            @Override            public void onNothingSelected(AdapterView<?> parent) {            }        });    }

MyGalleryAdapter

public class MyGalleryAdapter extends BaseAdapter {    private List<Fruit> mFruits;    private LayoutInflater mInflater;    public MyGalleryAdapter(LayoutInflater mFruits, List<Fruit> mInflater) {        this.mFruits = mFruits;        this.mInflater = mInflater;    }    @Override    public int getCount() {        return mFruits.size();    }    @Override    public Object getItem(int position) {        return position;    }    @Override    public long getItemId(int position) {        return position;    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {        ViewHolder viewHolder=null;        if(convertView==null){            convertView=mInflater.inflate(R.layout.item_gird,null);            viewHolder=new ViewHolder();            viewHolder.textView= (TextView) convertView.findViewById(R.id.textview);            viewHolder.imageView= (ImageView) convertView.findViewById(R.id.imageview);            convertView.setTag(viewHolder);        }else{            viewHolder= (ViewHolder) convertView.getTag();        }        Fruit fruit=mFruits.get(position);        viewHolder.textView.setText(fruit.getName());        viewHolder.imageView.setImageResource(fruit.getImg());        return convertView;    }    class ViewHolder{        TextView textView;        ImageView imageView;    }}

Fruit类

public class Fruit {    private String name;    private int img;    public Fruit(String name, int img) {        this.name = name;        this.img = img;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public int getImg() {        return img;    }    public void setImg(int img) {        this.img = img;    }}

item_gallery.xml

<?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">    <TextView        android:id="@+id/textview"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        />    <ImageView        android:id="@+id/imageview"        android:layout_width="100dp"        android:layout_height="100dp"        android:src="@mipmap/pineapple"/></LinearLayout>

activity_main.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=".MainActivity"><Gallery    android:id="@+id/gallery"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:spacing="50dp"    android:unselectedAlpha="0.5"></Gallery></RelativeLayout>

运行图

ExpandableListView案例

MainActivity

public class MainActivity extends AppCompatActivity {private ExpandableListView mEListView;    private List<Clazz>  mClazzs;private MyExpandableAdapter mAdapter;    private LayoutInflater mInflater;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        mEListView= (ExpandableListView) findViewById(R.id.expandlistview);        initData();        mInflater=getLayoutInflater();        mAdapter=new MyExpandableAdapter(mClazzs,mInflater);        mEListView.setAdapter(mAdapter);    }    private void initData() {        mClazzs=new ArrayList<>();        Clazz clazz1=new Clazz("一班","201501");      List<Student> student1=new ArrayList<>();        student1.add(new Student("张三","18","男"));        student1.add(new Student("李四","17","男"));        student1.add(new Student("王五","19","女"));        student1.add(new Student("赵六", "20", "男"));        student1.add(new Student("李悦","23","女"));        student1.add(new Student("曹林林","20","女"));        student1.add(new Student("张方舟","8","女"));        clazz1.setStudents(student1);        Clazz clazz2=new Clazz("二班","201502");        List<Student> student2=new ArrayList<>();        student2.add(new Student("张三","18","男"));        student2.add(new Student("李四","17","男"));        student2.add(new Student("王五","19","女"));        student2.add(new Student("赵六","20","男"));        clazz2.setStudents(student2);        Clazz clazz3=new Clazz("三班","201503");        List<Student> student3=new ArrayList<>();        student3.add(new Student("张三","18","男"));        student3.add(new Student("李四","17","男"));        student3.add(new Student("王五","19","女"));        student3.add(new Student("赵六","20","男"));        student3.add(new Student("杜蛋蛋","5","男"));        student3.add(new Student("曹晓晓","21","女"));        clazz3.setStudents(student3);        mClazzs.add(clazz1);        mClazzs.add(clazz2);        mClazzs.add(clazz3);    }

Clazz类

public class Clazz {    private String clazzName;    private String clazzNum;    private List<Student> students;    public String getClazzName() {        return clazzName;    }    public void setClazzName(String clazzName) {        this.clazzName = clazzName;    }    public Clazz(String clazzName, String clazzNum) {        this.clazzName = clazzName;        this.clazzNum = clazzNum;    }    public List<Student> getStudents() {        return students;    }    public void setStudents(List<Student> students) {        this.students = students;    }    public String getClazzNum() {        return clazzNum;    }    public void setClazzNum(String clazzNum) {        this.clazzNum = clazzNum;    }}

Student类

public class Student {    private  String studentName;    private  String age;    private  String sex;    private  String lable;    public String getStudentName() {        return studentName;    }    public void setStudentName(String studentName) {        this.studentName = studentName;    }    public String getAge() {        return age;    }    public void setAge(String age) {        this.age = age;    }    public String getSex() {        return sex;    }    public void setSex(String sex) {        this.sex = sex;    }    public String getLable() {        return lable;    }    public void setLable(String lable) {        this.lable = lable;    }    public Student(String studentName, String age, String sex) {        this.studentName = studentName;        this.age = age;        this.sex = sex;    }}

MyExpandableAdapter

public class MyExpandableAdapter extends BaseExpandableListAdapter {    private List<Clazz> mClazzs;    private LayoutInflater mInflater;    public MyExpandableAdapter(List<Clazz> mClazzs, LayoutInflater mInflater) {        this.mClazzs = mClazzs;        this.mInflater = mInflater;    }    @Override    public int getGroupCount() {        return mClazzs.size();    }    @Override    public int getChildrenCount(int groupPosition) {        return mClazzs.get(groupPosition).getStudents().size();    }    @Override    public Object getGroup(int groupPosition) {        return groupPosition;    }    @Override    public Object getChild(int groupPosition, int childPosition) {        return childPosition;    }    @Override    public long getGroupId(int groupPosition) {        return groupPosition;    }    @Override    public long getChildId(int groupPosition, int childPosition) {        return childPosition;    }    @Override    public boolean hasStableIds() {        return false;    }    @Override    public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {        convertView = mInflater.inflate(R.layout.item_clazz, null);        TextView textviewClazzName = (TextView) convertView.findViewById(R.id.textview_clazz_name);        TextView textviewClazzNum = (TextView) convertView.findViewById(R.id.textview_clazz_num);        TextView textviewClazzStudents = (TextView) convertView.findViewById(R.id.textview_clazz_students);        Clazz clazz = mClazzs.get(groupPosition);        textviewClazzName.setText(clazz.getClazzName());        textviewClazzNum.setText(clazz.getClazzNum());        textviewClazzStudents.setText("总人数：" + clazz.getStudents().size());        return convertView;    }    @Override    public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {        convertView = mInflater.inflate(R.layout.item_student, null);        TextView textviewStudentName = (TextView) convertView.findViewById(R.id.textview_student_name);        TextView textviewStudentAge = (TextView) convertView.findViewById(R.id.textview_student_age);        TextView textviewStudentSex = (TextView) convertView.findViewById(R.id.textview_student_sex);        Clazz clazz = mClazzs.get(groupPosition);        List<Student> students = clazz.getStudents();        Student student = students.get(childPosition);        textviewStudentName.setText(student.getStudentName());        textviewStudentAge.setText(student.getAge());        textviewStudentSex.setText(student.getSex());        return convertView;    }    @Override    public boolean isChildSelectable(int groupPosition, int childPosition) {        return false;    }}

activity_main.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=".MainActivity">   <ExpandableListView      android:id="@+id/expandlistview"       android:layout_width="match_parent"       android:layout_height="match_parent">   </ExpandableListView></RelativeLayout>

item_clazz.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="horizontal"    android:gravity="center_vertical"    android:background="@drawable/back"    ><TextView    android:id="@+id/textview_clazz_name"    android:layout_width="wrap_content"    android:layout_height="wrap_content" />    <TextView        android:id="@+id/textview_clazz_num"        android:layout_width="wrap_content"        android:layout_height="wrap_content" />    <TextView        android:id="@+id/textview_clazz_students"        android:layout_width="wrap_content"        android:layout_height="wrap_content" /></LinearLayout>

item_student.xml

<?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"><TextView    android:id="@+id/textview_student_name"    android:layout_width="wrap_content"    android:layout_height="wrap_content" />    <TextView        android:id="@+id/textview_student_sex"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_marginLeft="20dp"        android:layout_marginRight="20dp"/>    <TextView        android:id="@+id/textview_student_age"        android:layout_width="wrap_content"        android:layout_height="wrap_content" /></LinearLayout>

运行图

总结

1、先建立Activity，用setContentView()加载布局。
2、在XML文件中添加GridView布局（或者是AutoTextView、Spinner、Gallery等布局）。
3、用findViewById找到GridView布局的id号。
4、GridView布局显示数据的时候，必须设置adapter

设置adapter

继承BaseAdapter
实现四个方法（有些布局不止四个方法，比如ExpandableListView）
getView()方法
写内部类ViewHolder
5、初始化数据
6初始化Adapter
7、调用GridView的setAdapter（）。