需要用适配器。
ArrayAdapter 仅显示文本,有泛型。 常用"android.R.layout.simple_list_item_1",只有一个TextView。
SimpleAdapter 可以自定义显示,没有泛型。创建Map类型的集合。需要创建HashMap 和显示数据的布局文件(item.xml),map.put添加数据再用SimpleAdapter创建适配器。
布局:
<ListView
android:id="@+id/lv"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
java:
ArrayAdapter
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ListView lv = (ListView) findViewById(R.id.lv);
ArrayList<String> list = new ArrayList<>();
for (int i = 0; i < 100; i++) {
list.add(i + "");
}
ArrayAdapter<String> adapter = new ArrayAdapter<>(this
, android.R.layout.simple_list_item_1, list);
lv.setAdapter(adapter);
}
}
SimpleAdapter
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.app.Activity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.GridView;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Spinner;
public class MainActivity extends Activity {
ListView lv;
String[] names = { "范冰冰", "李晨", "王宝强" };
String[] contents = {"简介1","简介2","简介3"};
int[] imgs = { R.mipmap.1, R.mipmap.2, R.mipmap.3 };
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lv = (ListView) findViewById(R.id.lv);
List<HashMap<String, Object>> data = new ArrayList<HashMap<String, Object>>();
for (int i = 0; i < 3; i++) {
HashMap<String, Object> map = new HashMap<String, Object>();
map.put("img", ids[i]);
map.put("name", names[i]);
map.put("content", contents[i]);
data.add(map);
}
SimpleAdapter adapter = new SimpleAdapter(this, data,
R.layout.item_lv_star,
new String[] { "img", "name", "content" }, new int[] {R.id.img, R.id.name, R.id.content });
lv.setAdapter(adapter);
}
}
每一项的布局item.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<ImageView
android:id="@+id/img"
android:layout_width="80dp"
android:layout_height="100dp"
android:src="@mipmap/ic_launcher" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_toRightOf="@id/img"
android:orientation="vertical"
android:padding="10dp" >
<TextView
android:id="@+id/name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="名称" />
<TextView
android:id="@+id/content"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:text="简介" />
</LinearLayout>
</RelativeLayout>