• ListView_Adpter


    1.List.xml:
    <?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
    <ImageView
    android:id="@+id/img3"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    />
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/relayout"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_toRightOf="@+id/img3"
    android:layout_centerInParent="true"
    >
    <TextView
    android:id="@+id/t1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    />
    <TextView
    android:id="@+id/t2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@+id/t1"
    />
    </RelativeLayout>
    </RelativeLayout>
    2.Main.xml:
    <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="#FFFAF0"
    >
    <Button
    android:id="@+id/btn"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="下一个视图布局"
    />
    <ListView
    android:id="@+id/list"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    />
    </LinearLayout>
    4. TestadpterActivity:
    /**
    * 自定义适配器
    *
    *
    @author hongj
    *
    */
    public class TestadpterActivity extends Activity {
    private ListView listview;
    private Myadpter myadpter;
    private Button button;
    private List<Student> list = new ArrayList<Student>();

    @Override
    public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    Student student = new Student();
    student.age="20";
    student.name="张三";
    student.sex="女";
    list.add(student);
    Student student2 = new Student();
    student2.age="20";
    student2.name="王五";
    student2.sex="男";
    list.add(student2);


    button = (Button) findViewById(R.id.btn);
    button.setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View v) {
    Intent intent = new Intent(TestadpterActivity.this,TestSimpleAdapter.class);
    startActivity(intent);
    }
    });
    listview = (ListView) findViewById(R.id.list);
    myadpter = new Myadpter();
    listview.setAdapter(myadpter);
    }

    private class Holder {
    TextView hTextView1;
    TextView hTextView2;
    ImageView imageView3;
    }

    class Myadpter extends BaseAdapter {
    private LayoutInflater inflater = null;

    public Myadpter() {
    super();
    inflater = LayoutInflater.from(TestadpterActivity.this);
    }

    @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) {
    Holder holder = new Holder();
    if (null == convertView) {
    convertView = inflater.inflate(R.layout.list, parent, false);
    }
    holder.hTextView1 = (TextView) convertView.findViewById(R.id.t1);
    holder.hTextView2 = (TextView) convertView.findViewById(R.id.t2);
    holder.imageView3 = (ImageView) convertView.findViewById(R.id.img3);

    holder.hTextView1.setText(list.get(position).name);
    holder.hTextView2.setText(list.get(position).sex);
    holder.imageView3.setImageResource(R.drawable.icon);
    return convertView;
    }

    }
    class Student{
    String name;
    String sex;
    String age;
    }
    }
    5. TestSimpleAdapter:
    import java.util.ArrayList;
    import java.util.HashMap;

    import android.app.Activity;
    import android.content.Intent;
    import android.os.Bundle;
    import android.view.View;
    import android.view.View.OnClickListener;
    import android.widget.Button;
    import android.widget.ListView;
    import android.widget.SimpleAdapter;

    public class TestSimpleAdapter extends Activity {

    private ListView listView;
    private Button button;
    private SimpleAdapter simpleAdapter;
    private ArrayList<HashMap<String, Object>> list = new ArrayList<HashMap<String,Object>>();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    listView = (ListView) findViewById(R.id.list);
    button = (Button) findViewById(R.id.btn);
    button.setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View v) {
    Intent intent = new Intent(TestSimpleAdapter.this,TestArrayAdapter.class);
    startActivity(intent);
    }
    });
    HashMap<String, Object> map = new HashMap<String, Object>();
    map.put("textview1", "textview1");
    map.put("textview2", "TEXTVIEW2");
    map.put("imag3", R.drawable.icon);
    String[] from ={"textview1","textview2","imag3"};
    int[] to ={R.id.t1,R.id.t2,R.id.img3};
    list.add(map);
    simpleAdapter = new SimpleAdapter(this, list, R.layout.list, from, to);
    listView.setAdapter(simpleAdapter);
    }
    }
    6. TestArrayAdapter:
    import java.util.ArrayList;
    import java.util.List;

    import android.app.Activity;
    import android.os.Bundle;
    import android.view.View;
    import android.widget.ArrayAdapter;
    import android.widget.Button;
    import android.widget.ListView;

    public class TestArrayAdapter extends Activity {

    private ArrayAdapter arrayAdapter;
    private ListView listView;
    private List list;
    private Button button;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    list = new ArrayList();
    list.add("你好,这是ArrayAdapter");
    listView = (ListView) findViewById(R.id.list);
    arrayAdapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1,list);
    listView.setAdapter(arrayAdapter);
    button = (Button) findViewById(R.id.btn);
    button.setVisibility(View.GONE);
    }
    }

    7.效果图:

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  • 原文地址:https://www.cnblogs.com/jh5240/p/2422392.html
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