2018-06-05-ListView

ListView

静态的词条匹配

通过android:entries属性来创建

1. 首先在res/values下创建arrays.xml文件

2. 加载到Activity

public class MainActivity extends AppCompatActivity {
    private ListView listView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        listView = (ListView) findViewById(R.id.listView);
        //添加时间监听
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView parent, View view, int position, long id) {
                TextView tv = (TextView) view;
                Toast.makeText(MainActivity.this,tv.getText(),Toast.LENGTH_SHORT).show();
            }
        });
    }
    
}

ListView专用的Activity：ListActivity

注意：对于 ListView专用的Activity：ListActivity来说，他不需要配置布局文件，只需要有数据文件

1. 首先在res/values下创建arrays.xml文件

2. Activity

public class Main3Activity extends ListActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        
        //使用android提供的样式
        ArrayAdapter arrayAdapter = ArrayAdapter.createFromResource(this, R.array.name, android.R.layout.simple_list_item_1);
        setListAdapter(arrayAdapter);
    }

    //设置事件监听
    @Override
    protected void onListItemClick(ListView l, View v, int position, long id) {
        Toast.makeText(this,((TextView)v).getText(),Toast.LENGTH_SHORT).show();
    }
}

ListView和ListActivity单选框和多选框

1. xml文件布局

2. Activity

public class Main4ctivity extends AppCompatActivity {

    private ListView listView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main4ctivity);

        listView = (ListView) findViewById(R.id.listView2);

        String[] arr = getResources().getStringArray(R.array.name);
        
        //单选框
//        ArrayAdapter arrayAdapter = new ArrayAdapter(this,android.R.layout.simple_list_item_single_choice,arr);
//        listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);

       //多选框
        ArrayAdapter arrayAdapter1 = new ArrayAdapter(this,android.R.layout.simple_list_item_multiple_choice,arr);
        listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);

        listView.setAdapter(arrayAdapter1);
    }

}

ListView实现图文列表

1. xml布局文件

2. ListView每单元的布局文件

3. Activity

public class Main5Activity extends AppCompatActivity {

    private ListView listView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main5);

        listView = (ListView) findViewById(R.id.listView3);

        //准备数据，每一个HashMap是一条记录
        
        //这俩个内容对应着Map的两个key，"title"、"icon"
        HashMap title1 = new HashMap<>();
        title1.put("title","title-1");
        title1.put("icon",android.R.drawable.alert_dark_frame);
        HashMap title2 = new HashMap<>();
        title2.put("title", "title-2");
        title2.put("icon",android.R.drawable.arrow_up_float);
        HashMap title3 = new HashMap<>();
        title3.put("title", "title-3");
        title3.put("icon",android.R.drawable.bottom_bar);

        //适配器中是ArrayList类型的数据，ArrayList中每条是ListView的一行数据
        ArrayList> list = new ArrayList<>();
        list.add(title1);
        list.add(title2);
        list.add(title3);

        //把数据填充到Adapter中
        SimpleAdapter sa = new SimpleAdapter(this,list,R.layout.list_item_5,new String[]{"title","icon"},new int[]{R.id.textView2,R.id.imageView});
        listView.setAdapter(sa);
    }

}

L	文字Map	图片Map
I	文字Map	图片Map
S	文字Map	图片Map
T	文字Map	图片Map

自定义的ListView

1. xml文件，添加ListView

2. 自定义的ListView每行的布局文件

3. Activity，绑定自定义的适配器

public class Main6Activity extends AppCompatActivity {

    private ListView listView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main6);

        listView = (ListView) findViewById(R.id.listView4);
        listView.setAdapter(new MyAdapter(this));


    }


    static class MyAdapter extends BaseAdapter{
        private String[] titles = {"title-1","title-2","title-3","title-4","title-5"};
        private int[] icons = {android.R.drawable.ic_btn_speak_now,
                android.R.drawable.alert_dark_frame,
                android.R.drawable.alert_light_frame,
                android.R.drawable.arrow_down_float,
                android.R.drawable.arrow_up_float,
        };
        private Context context;

        public MyAdapter(Context context){
            this.context = context;
        }

        @Override
        public int getCount() {
            return titles.length;
        }

        @Override
        public Object getItem(int position) {
            return titles[position];
        }

        @Override
        public long getItemId(int position) {
            return position;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
        
            //获取资源文件
            LayoutInflater inflater = LayoutInflater.from(context);
            View view = inflater.inflate(R.layout.list_item_6, null);

            //获取布局文件
            TextView textView = (TextView) view.findViewById(R.id.textView2);
            ImageView imageView = (ImageView) view.findViewById(R.id.imageView);
            
            //添加文字图片到布局中
            textView.setText(titles[position]);
            imageView.setImageResource(icons[position]);


            //返回视图
            return view;
        }
    }

}