带有ImageView和TextView的Android片段自定义适配器
我正在尝试实现这样的功能-。带有ImageView和TextView的Android片段自定义适配器,android,android-fragments,baseadapter,Android,Android Fragments,Baseadapter,我正在尝试实现这样的功能-。 这是我的BaseAdapter类 public class ImageAdapter extends BaseAdapter { private Context mContext; LayoutInflater in = (LayoutInflater) mContext .getSystemService(Context.LAYOUT_INFLATER_SERVICE); public ImageAdapter(Context c) {
这是我的BaseAdapter类
public class ImageAdapter extends BaseAdapter {
private Context mContext;
LayoutInflater in = (LayoutInflater) mContext
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
public ImageAdapter(Context c) {
mContext = c;
}
public int getCount() {
return mThumbIds.length;
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder view;
if (convertView == null) {
view = new ViewHolder();
convertView = in.inflate(R.layout.country_row, null);
view.txtView = (TextView) convertView
.findViewById(R.id.countryName);
view.txtView.setText(countryName[position]);
convertView.setTag(view);
} else {
view = (ViewHolder) convertView.getTag();
}
view.imgView = (ImageView) convertView.findViewById(R.id.countryImage);
view.imgView.setImageResource(mThumbIds[position]);
return convertView;
}
private Integer[] mThumbIds = { R.drawable.india_flag,
R.drawable.china_flag, R.drawable.argentina_flag,
R.drawable.england_flag, R.drawable.france_flag,
R.drawable.united_states_flag, R.drawable.uruguay_flag,
R.drawable.pakistan_flag, R.drawable.united_kingdom_flag,
R.drawable.italy_flag, R.drawable.germany_flag,
R.drawable.brazil_flag, R.drawable.belgium_flag,
R.drawable.denmark_flag, R.drawable.czech_republic_flag,
R.drawable.jamaica_flag, R.drawable.indonesia_flag,
R.drawable.kenya_flag, R.drawable.korea_flag,
R.drawable.ireland_flag,
};
private String[] countryName = { "India", "China", "Argentina", "England",
"France", "United States", "Uruguay", "Pakistan", "United Kingdom",
"Italy", "Germany", "Brazil", "Belgium", "Denmark",
"Czech Republic", "Jamaica", "Indonesia", "Kenya", "Korea",
"Ireland"
};
public static class ViewHolder {
public ImageView imgView;
public TextView txtView;
}
country_row.xml包含ImageView和TextView。Countries类扩展了Fragment,Countries.xml包含GridView(我想我在这个类中弄错了什么,但我无法更正它) }
country\u row.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
android:id="@+id/relativeLayout1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
xmlns:android="http://schemas.android.com/apk/res/android"
android:padding="5dp">
<ImageView
android:layout_height="128dp"
android:id="@+id/countryImage"
android:layout_width="128dp"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true">
</ImageView>
<TextView
android:layout_height="wrap_content"
android:id="@+id/countryName"
android:layout_width="wrap_content"
android:layout_below="@+id/countryImage"
android:layout_marginTop="2dp"
android:layout_centerHorizontal="true"
android:textSize="18sp"
android:ellipsize="marquee"></TextView>
</RelativeLayout>
<?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:background="#ffffff"
android:orientation="vertical" >
<GridView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/myGrid"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:columnWidth="130dp"
android:gravity="center"
android:horizontalSpacing="10dp"
android:numColumns="auto_fit"
android:padding="10dp"
android:stretchMode="columnWidth"
android:verticalSpacing="10dp" />
</LinearLayout>
<LinearLayout 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:orientation="horizontal">
<fragment
android:name="com.example.fragmentsproject.Countries"
android:id="@+id/frag1"
android:layout_weight="1"
android:layout_width="0px"
android:layout_height="match_parent"/>
<fragment
android:name="com.example.fragmentsproject.Capitals"
android:id="@+id/frag2"
android:layout_weight="1"
android:layout_width="0px"
android:layout_height="match_parent"/>
</LinearLayout>
}
这是我的日志
02-20 17:44:50.576: E/AndroidRuntime(1362): FATAL EXCEPTION: main
02-20 17:44:50.576: E/AndroidRuntime(1362): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.fragmentsproject/com.example.fragmentsproject.MainActivity}: android.view.InflateException: Binary XML file line #7: Error inflating class fragment
02-20 17:44:50.576: E/AndroidRuntime(1362): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1815)
02-20 17:44:50.576: E/AndroidRuntime(1362): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1831)
02-20 17:44:50.576: E/AndroidRuntime(1362): at android.app.ActivityThread.access$500(ActivityThread.java:122)
02-20 17:44:50.576: E/AndroidRuntime(1362): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1024)
02-20 17:44:50.576: E/AndroidRuntime(1362): at android.os.Handler.dispatchMessage(Handler.java:99)
02-20 17:44:50.576: E/AndroidRuntime(1362): at android.os.Looper.loop(Looper.java:132)
02-20 17:44:50.576: E/AndroidRuntime(1362): at android.app.ActivityThread.main(ActivityThread.java:4123)
02-20 17:44:50.576: E/AndroidRuntime(1362): at java.lang.reflect.Method.invokeNative(Native Method)
02-20 17:44:50.576: E/AndroidRuntime(1362): at java.lang.reflect.Method.invoke(Method.java:491)
02-20 17:44:50.576: E/AndroidRuntime(1362): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
02-20 17:44:50.576: E/AndroidRuntime(1362): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
02-20 17:44:50.576: E/AndroidRuntime(1362): at dalvik.system.NativeStart.main(Native Method)
02-20 17:44:50.576: E/AndroidRuntime(1362): Caused by: android.view.InflateException: Binary XML file line #7: Error inflating class fragment
02-20 17:44:50.576: E/AndroidRuntime(1362): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:688)
02-20 17:44:50.576: E/AndroidRuntime(1362): at android.view.LayoutInflater.rInflate(LayoutInflater.java:724)
02-20 17:44:50.576: E/AndroidRuntime(1362): at android.view.LayoutInflater.inflate(LayoutInflater.java:479)
请有人帮帮我,
提前谢谢。尝试删除xmlns:android=”http://schemas.android.com/apk/res/android“来自GridView声明。我也建议改变 setAdapter(新的ImageAdapter(view.getContext()) 对此 setAdapter(新的ImageAdapter(getActivity())
您提供的跟踪中的根本原因是“02-20 17:44:50.576:E/AndroidRuntime(1362):由以下原因引起:android.view.InflateException:Binary XML文件行#7:错误膨胀类片段”, 因此,请确保您正在使用:
import android.support.v4.app.Fragment;
作为一个班级,与您的国家/地区班级一起扩展。另外,使用片段的活动应该扩展FragmentActivity,而不是常规活动。进口:
import android.support.v4.app.FragmentActivity;
此外,我不建议您以这种方式初始化类字段:
LayoutInflater in = (LayoutInflater) mContext
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
因为mContext字段可以在构造函数调用后保存空引用。最好在构造函数中执行一些条件检查。将LayoutFlater放入getView 像
删除GridView标签xmlns:android=”“中的这一行,然后再试一次。这对我不起作用!国家和首都的名称空间是什么?
import android.support.v4.app.FragmentActivity;
LayoutInflater in = (LayoutInflater) mContext
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater in = (LayoutInflater) mContext
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);