-3
我已經創建了一個ArrayAdapter列表視圖,當我運行它,它顯示我在運行時一個空的活動,我不知道錯:的ListView從ArrayAdapter
這裏是在MainActivity和一個ArrayAdapter類
public class MainActivity extends Activity {
String [] title ;
ListView list;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
list = (ListView) findViewById(R.id.list);
title = getResources().getStringArray(R.array.titles);
list.setAdapter(new MyAdapter(MainActivity.this, title));
}
}
class MyAdapter extends ArrayAdapter{
String [] title;
Context context;
public MyAdapter(Context context, String[] title) {
super(context,R.layout.single_row,R.id.img);
this.title = title;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
TextView tv;
ImageView iv;
View row = convertView;
if(row==null)
{
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = inflater.inflate(R.layout.single_row, parent, false);
}
tv = (TextView) row.findViewById(R.id.title);
tv.setText(title[position]);
iv = (ImageView) row.findViewById(R.id.img);
iv.setImageResource(R.drawable.arrow);
return row;
}
}
activity_main.xml中包含的ListView
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">
<ListView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/list"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
</RelativeLayout>
single_row.xml包含列表視圖中的元素
<?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">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/img"
android:src="@drawable/arrow"
android:layout_margin="15dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="New Text"
android:textSize="@dimen/abc_action_bar_stacked_max_height"
android:id="@+id/title"
android:layout_gravity="center_vertical" />
</LinearLayout>
</LinearLayout>
抱歉,如果我沒有添加任何圖片我沒有足夠的聲譽 –
實施BaseAdapter類自定義列表視圖,更有效,請嘗試使用它作爲Moubeen的回答顯示 – mrahmat
我猜有問題用你的xml MainActivity。你能把它放在這裏嗎? – Simar