package?arrayadapter.listview.immoc.myapplication001;
import?android.app.Activity;
import?android.os.Bundle;
import?android.widget.ArrayAdapter;
import?android.widget.ListView;
import?android.widget.SimpleAdapter;
import?java.util.HashMap;
import?java.util.List;
import?java.util.Map;
public?class?MainActivity?extends?Activity{
????private?ListView?listView1;
????private?ArrayAdapter<String>?arr_adapter;
????private?SimpleAdapter?sim_adpter;
????private?List<Map<String?,?Object>>??datalist;
????@Override
????protected?void?onCreate(Bundle?savedInstanceState)?{
????????super.onCreate(savedInstanceState);
????????setContentView(R.layout.activity_main);
????????listView1=(ListView)findViewById(R.id.listview);
//????????新建一個(gè)數(shù)據(jù)源適配器
//????????新建一個(gè)數(shù)據(jù)源
????????String[]arr_data?={"慕課1","慕課2","慕課3","慕課4","慕課5","慕課6"};
???????arr_adapter?=new?ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,arr_data);
//????????視圖加載適配器
//????????listView1.setAdapter(arr_adapter);
?????????sim_adpter=new?SimpleAdapter(this,getData(),R.layout.item?,new?String?[]?{"pic","txt"},new?int?[]?{R.id.pic,R.id.txt});
?????????listView1.setAdapter(sim_adpter);
????}
????private?List<Map<String,Object>>?getData()
????{
????????for(int?i=0;i<20;i++)
????????{
????????????Map<String,Object>map?=?new?HashMap<String,Object>();
????????????map.put("pic",R.mipmap.ic_launcher);
????????????map.put("txt","慕課網(wǎng)"+i+1);
????????????datalist.add(map);
????????}
????????return?datalist;
????}
}<?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">
????<ImageView
????????android:id="@+id/pic"
????????android:layout_width="80dp"
????????android:layout_height="80dp"
????????android:layout_margin="15dp"
????????android:src="@mipmap/ic_launcher"
????????/>
????<TextView
????????android:id="@+id/txt"
????????android:layout_width="wrap_content"
????????android:layout_height="wrap_content"
????????android:layout_gravity="center_horizontal"
????????android:text="demo"
????????/>
</LinearLayout><?xml?version="1.0"?encoding="utf-8"?>
<LinearLayout?xmlns:android="http://schemas.android.com/apk/res/android"
????xmlns:app="http://schemas.android.com/apk/res-auto"
????xmlns:tools="http://schemas.android.com/tools"
????android:layout_width="match_parent"
????android:layout_height="match_parent"
????tools:context=".MainActivity"
????android:orientation="vertical"
????>
????<ListView
????????android:id="@+id/listview"
????????android:layout_width="wrap_content"
????????android:layout_height="wrap_content"
????????></ListView>
</LinearLayout>
為什么白屏啊，Android stuio中運(yùn)行的，求大佬指點(diǎn)
慕前端0498997
2018-10-11 12:56:47
