我在这个问题上需要一些帮助。当我将项目添加到网格布局时，添加到容器的一些重复项目以及滚动其位置时会发生变化。这是XML和Java代码。
布局：
<RelativeLayout
android:id="@+id/relativeLayout1"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TableRow android:layout_width="wrap_content" android:paddingTop="20dp" android:layout_height="wrap_content" android:id="@+id/tableRow2" android:layout_centerHorizontal="true" android:background="@color/transparent" android:minHeight="110dp">
<ImageView android:layout_height="wrap_content" android:layout_width="wrap_content" android:src="@drawable/school_logo_default" android:layout_gravity="bottom" android:id="@+id/school_logo"></ImageView>
</TableRow>
<ImageView
android:layout_width="fill_parent"
android:layout_height="90dip"
android:layout_alignParentTop="true"
android:src="@drawable/gradient_top"
android:scaleType="fitXY"
/>
<ImageView
android:layout_width="fill_parent"
android:layout_height="90dip"
android:layout_alignParentBottom="true"
android:src="@drawable/gradient_bottom"
android:scaleType="fitXY"
/>
<LinearLayout
android:id="@+id/top"
android:layout_width="fill_parent"
android:layout_height="wrap_content" android:gravity="left|top">
<TextView android:layout_height="wrap_content" android:textColor="@color/white" android:layout_weight="1" android:textStyle="bold" android:text="@string/userName" android:layout_width="wrap_content" android:layout_gravity="center_vertical" android:layout_marginRight="20dip" android:gravity="left|top" android:background="@color/transparent" android:paddingLeft="5dp" android:textSize="16px" android:paddingTop="5dp" android:id="@+id/username"></TextView>
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:paddingBottom="20dip"
android:layout_alignParentBottom="true"
android:id="@+id/bottom">
<ImageView android:layout_height="wrap_content" android:layout_width="wrap_content" android:id="@+id/screen_icon" android:src="@drawable/sl_tools"></ImageView>
</LinearLayout>
<TableRow android:layout_width="wrap_content" android:gravity="center" android:layout_height="wrap_content" android:id="@+id/tableRow1" android:layout_centerInParent="true" android:background="@color/transparent">
<ListView android:columnWidth="120dp" android:id="@+id/gridView1" android:numColumns="4" android:verticalSpacing="10dip" android:gravity="center" android:horizontalSpacing="10dip" android:scrollbars="vertical" android:layout_gravity="center" android:stretchMode="columnWidth" android:background="@color/transparent" android:paddingTop="140dip" android:paddingBottom="80dip"></ListView>
</TableRow>
</RelativeLayout>
</FrameLayout>
MyInternet类：
package com.explore.home;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.graphics.Color;
import android.net.Uri;
import android.os.Bundle;
import android.util.AndroidException;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.FrameLayout;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TableLayout;
import android.widget.TextView;
import android.widget.Toast;
import com.explore.objects.PInfoItem;
import com.explore.utils.DMS;
import com.explore.utils.Utils;
public class MyInternet extends Activity {
private static final String LOG = "My Internet";
public List<AppInfo> listApps = new ArrayList<AppInfo>();
LayoutInflater inflator;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
super.onCreate(savedInstanceState);
inflator = getLayoutInflater();
setContentView(R.layout.myinternet);
TextView tv = (TextView) findViewById(R.id.username);
tv.setText(DMS.userProfile.user_fname + " " + DMS.userProfile.user_lname);
FrameLayout lLayout = (FrameLayout) findViewById(R.id.myinternetlayout);
lLayout.setBackgroundColor(Color.parseColor(DMS.deviceSettings.Background_Color));
try
{
listApps = Utils.getAppsForScreen(getBaseContext(), "myinternet");
}
catch (IOException e)
{
Toast.makeText(getBaseContext(), "Error MyInternet - " +e.getMessage(), Toast.LENGTH_SHORT).show();
}
ImageView iv1 = (ImageView)findViewById(R.id.school_logo);
iv1.setImageBitmap(Utils.getBitmapByURL(DMS.deviceConfig.curriculum_loft_url + DMS.deviceSettings.School_Logo));
GridView gv = (GridView)findViewById(R.id.gridView1);
gv.setAdapter(new ButtonAdapter(this));
}
class MyOnClickListener implements OnClickListener {
private final int position;
public MyOnClickListener(int position) {
this.position = position;
}
public void onClick(View v) {
Log.i(LOG, "handler=" + listApps.get(position).appName);
try {
handler(listApps.get(position));
} catch (AndroidException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
private void handler(AppInfo appInfo) throws AndroidException, ClassNotFoundException
{
if(appInfo.type==0) // Shell Out APK
{
File realFilePath = new File("/data/data/com.explore.home/files/"+ appInfo.appFileName);
PackageManager pm = getBaseContext().getPackageManager();
PackageInfo packageInfo = pm.getPackageArchiveInfo( realFilePath.getAbsolutePath(),0);
//PackageManager pm = getPackageManager();
//Intent il = pm.getLaunchIntentForPackage(appInfo.packageName);
Intent il = pm.getLaunchIntentForPackage(packageInfo.packageName);
//Intent i = new Intent();
il.setAction(Intent.ACTION_MAIN);
il.addCategory(Intent.CATEGORY_LAUNCHER);
il.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
ComponentName cn = new ComponentName(packageInfo.packageName, il.getComponent().getClassName());
il.setComponent(cn);
startActivity(il);
return;
}
if(appInfo.type==1) // Shell Out Hyper Link
{
Uri uriUrl = Uri.parse(appInfo.url);
Intent intent = new Intent(Intent.ACTION_VIEW, uriUrl);
startActivity(intent);
}
else {
Toast.makeText(this, "Not Yet Implemented", Toast.LENGTH_LONG).show();
}
}
class ButtonAdapter extends BaseAdapter {
private Context mContext;
// Gets the context so it can be used later
public ButtonAdapter(Context c) {
mContext = c;
}
// Total number of things contained within the adapter
public int getCount() {
return listApps.size();
}
// Require for structure, not really used in my code.
public Object getItem(int position) {
return null;
}
// Require for structure, not really used in my code. Can
// be used to get the id of an item in the adapter for
// manual control.
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
TableLayout ll;
if (convertView == null) {
Log.i(LOG, "position=" + position);
Log.i(LOG, "count=" + listApps.size());
for(int i=0; i<listApps.size(); i++) {
Log.i(LOG, "apps=" + listApps.get(i).appName);
}
// if it's not recycled, initialize some attributes
AppInfo appInfo = listApps.get(position);
Log.i(LOG, "app name =" + appInfo.appName);
ll = (TableLayout)inflator.inflate(R.layout.app, null, true);
ImageView iv1 = (ImageView)ll.findViewById(R.id.app_icon);
TextView iv2 = (TextView)ll.findViewById(R.id.app_title);
iv2.setText(appInfo.appName);
if(appInfo.type==0)
{
iv1.setImageBitmap(Utils.getAPKIcon(getApplicationContext(), appInfo));
}else
{
if(appInfo.icon!=null)
{
iv1.setImageBitmap(appInfo.icon);
}
}
iv1.setOnClickListener(new MyOnClickListener(position));
iv2.setOnClickListener(new MyOnClickListener(position));
}
else {
ll = (TableLayout) convertView;
}
return ll;
}
}
}
请让我知道为什么添加了一些重复的项目而不是实际的项目。滚动他们的位置时已经改变了。
答案 0 :(得分：1)
删除条件并准备好
if (convertView == null)