Android_Menu

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代码块：

public class MainActivity extends AppCompatActivity {    int[] imgs={R.mipmap.img001,R.mipmap.img002,R.mipmap.img003,R.mipmap.img004,R.mipmap.img005,            R.mipmap.img001,R.mipmap.img002,R.mipmap.img003,R.mipmap.img004,R.mipmap.img005};    private ListView lv;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        lv=(ListView)findViewById(R.id.lv);        final List<Map<String,Object>> list=new ArrayList<>();        for (int i=0;i<10;i++){            Map<String,Object> map= new HashMap<>();            map.put("name","我是"+i);            map.put("img",imgs[i]);            map.put("phone","111222"+i);            list.add(map);        }        MyAdapter adapter=new MyAdapter(this,list);        lv.setAdapter(adapter);        lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {            @Override            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {                if(position==0){//第一个同学                    new AlertDialog.Builder(MainActivity.this).setMessage(list.get(position).get("name").toString()).show();                }else if(position==1){//第二个同学                    Calendar calendar=Calendar.getInstance();                    new DatePickerDialog(MainActivity.this, new DatePickerDialog.OnDateSetListener() {                        @Override                        public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) {                        }                    },calendar.get(Calendar.YEAR),calendar.get(Calendar.MONTH),calendar.get(Calendar.DAY_OF_MONTH)).show();                }else if(position==2){//第三个同学                    View inflate = View.inflate(MainActivity.this, R.layout.list_item, null);                    ImageView iv=(ImageView) inflate.findViewById(R.id.tv_iv);                    TextView tv_name=(TextView)inflate.findViewById(R.id.tv_name);                    TextView tv_phone=(TextView)inflate.findViewById(R.id.tv_phone);                    iv.setImageResource((int)list.get(position).get("img"));                    tv_name.setText(list.get(position).get("name").toString());                    tv_phone.setText(list.get(position).get("phone").toString());                    new AlertDialog.Builder(MainActivity.this).setView(inflate).show();                }            }        });    }}

适配器：

public class MyAdapter extends BaseAdapter {    Context context;    List<Map<String,Object>> list;    public MyAdapter(Context context, List<Map<String,Object>> list){        this.context=context;        this.list=list;    }    @Override    public int getCount() {        return list.size();    }    @Override    public Object getItem(int position) {        return list.get(position);    }    @Override    public long getItemId(int position) {        return position;    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {        Viewholder vh;        if(convertView==null){            convertView=View.inflate(context,R.layout.list_item,null);            vh=new Viewholder();            vh.tv_name=(TextView) convertView.findViewById(R.id.tv_name);            vh.tv_phone=(TextView)convertView.findViewById(R.id.tv_phone);            vh.tv_iv=(ImageView)convertView.findViewById(R.id.tv_iv);            convertView.setTag(vh);        }else {            vh=(Viewholder)convertView.getTag();        }        vh.tv_name.setText(list.get(position).get("name").toString());        vh.tv_phone.setText(list.get(position).get("phone").toString());        vh.tv_iv.setImageResource((int)list.get(position).get("img"));        return convertView;    }    class Viewholder{        ImageView tv_iv;        TextView tv_name;        TextView tv_phone;    }}

布局：

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/activity_main"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context="org.frxm.day02_menu.MainActivity">    <ListView        android:id="@+id/lv"        android:layout_width="match_parent"        android:layout_height="match_parent"        /></RelativeLayout>

item布局：

<?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">    <ImageView        android:id="@+id/tv_iv"        android:layout_width="80dp"        android:layout_height="80dp"/>    <TextView        android:id="@+id/tv_name"        android:layout_width="wrap_content"        android:layout_height="40dp"        android:layout_toRightOf="@id/tv_iv"        android:text="姓名"        android:gravity="center_vertical"/>    <TextView        android:id="@+id/tv_phone"        android:layout_width="wrap_content"        android:layout_height="40dp"        android:layout_toRightOf="@id/tv_iv"        android:layout_below="@id/tv_name"        android:text="手机号"        android:gravity="center_vertical"/></RelativeLayout>

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