应用程式从ListView实作崩溃
[英]App crashing from listview implementaion
问题描述
I recently tried to create a custom row for listview. 
我最近尝试为listview创建一个自定义行。 I tried to do it off a tutorial but it crashes when I tried to change it so the rows work with what I want my app to display. 我试图从一个教程中删除它，但是当我尝试更改它时它崩溃了，因此行与我希望我的应用程序显示的内容一起工作。 Error readout is at the bottom. 错误读数在底部。
Also not related to the problem but I was curious if I am able to use imageId as my holder in the custom adapter class for each of the 3 images I want to be in the row or if they need to be unique. 同样与问题无关，但是我很好奇我是否能够将imageId用作自定义适配器类中我想排成一行的3个图像中每个图像的持有人，或者它们是否需要唯一。
holder.img2.setImageResource(imageId[position]); holder.img2.setImageResource（imageId [position]）;
-----Homeactivitylistview.java----------- ----- Homeactivitylistview.java -----------
public class HomeActivityListview extends AppCompatActivity {
ListView lv;
Context context;
ArrayList dogName;
ArrayList dogID;
public static int [] dogImages={R.id.dogimage};
public static String [] dogNames={};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home_activity_listview);
context=this;
lv=(ListView) findViewById(R.id.listView);
lv.setAdapter(new CustomAdapter(this, dogImages));
}
public void sendProfile(View view) {
Intent intent = new Intent(getApplicationContext(), DogProfileActivity.class);
startActivity(intent);
}
public void NumberOne(View view) {
AlertDialog.Builder alertDlg = new AlertDialog.Builder(this);
alertDlg.setMessage("Confirm Dog went number one");
alertDlg.setCancelable(false);
alertDlg.setPositiveButton("Confirm", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
//HomeActivity.super.onBackPressed();
}
});
alertDlg.setNegativeButton("Change", new DialogInterface.OnClickListener(){
@Override
public void onClick(DialogInterface dialog, int which) {
//HomeActivity.super.onBackPressed();
}
});
alertDlg.create().show();
}
public void NumberTwo(View view) {
AlertDialog.Builder alertDlg = new AlertDialog.Builder(this);
alertDlg.setMessage("Confirm Dog went number two");
alertDlg.setCancelable(false);
alertDlg.setPositiveButton("Confirm", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
//HomeActivity.super.onBackPressed();
}
});
alertDlg.setNegativeButton("Change", new DialogInterface.OnClickListener(){
@Override
public void onClick(DialogInterface dialog, int which) {
//HomeActivity.super.onBackPressed();
}
});
alertDlg.create().show();
}
public void AddNewDog(View view) {
Intent intent = new Intent(getApplicationContext(), NewDogActivity.class);
startActivity(intent);
}
}
------------------- customadapter.java ------------------------- ------------------- customadapter.java -------------------------
public class CustomAdapter extends BaseAdapter{
String [] result;
Context context;
int [] imageId;
private static LayoutInflater inflater=null;
public CustomAdapter(HomeActivityListview homeActivityListview, int[] dogImages) {
// TODO Auto-generated constructor stub
context=homeActivityListview;
imageId=dogImages;
inflater = ( LayoutInflater )context.
getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return imageId.length;
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
public class Holder
{
ImageView img;
ImageView img1;
ImageView img2;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
Holder holder=new Holder();
View rowView;
rowView = inflater.inflate(R.layout.home_single_row, null);
holder.img=(ImageView) rowView.findViewById(R.id.dogimage);
holder.img1=(ImageView) rowView.findViewById(R.id.dog1num1);
holder.img2=(ImageView) rowView.findViewById(R.id.dog1num2);
holder.img.setImageResource(imageId[position]);
holder.img1.setImageResource(imageId[position]);
holder.img2.setImageResource(imageId[position]);
rowView.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Toast.makeText(context, "You Clicked "+result[position], Toast.LENGTH_LONG).show();
}
});
return rowView;
}
}
----------------------singlerow.xml-------------------------- ---------------------- singlerow.xml ------------------------- --
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageButton
android:layout_width="150dip"
android:layout_height="150dip"
android:id="@+id/dogimage"
android:clickable="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:background="@drawable/dogpic"
android:onClick="sendProfile"/>
<ImageButton
android:layout_width="75dip"
android:layout_height="75dip"
android:id="@+id/dog1num1"
android:background="@drawable/num1"
android:clickable="true"
android:onClick="NumberOne"
android:layout_marginLeft="30dp"
android:layout_marginTop="75dp" />
<ImageButton
android:layout_width="75dip"
android:layout_height="75dip"
android:id="@+id/dog1num2"
android:background="@drawable/num2"
android:clickable="true"
android:onClick="NumberTwo"
android:layout_marginLeft="25dp"
android:layout_marginTop="75dp" />
------------homescreen.xml------------------ ------------ homescreen.xml ------------------
<?xml version="1.0" encoding="utf-8"?>
<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:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="cs495capstone.edu.bsu.doggydid.HomeActivityListview
"
android:background="@drawable/screenbackground">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/selectprofiletext"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:textColor="#2c7134"
android:text="Select a profile or make a post:"
/>
<ListView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/listView"
android:layout_above="@+id/newdogbutton"
android:entries="@array/dogs"
android:layout_below="@+id/selectprofiletext"
android:layout_marginTop="10dip" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Add new dog"
android:id="@+id/newdogbutton"
android:background="#2c7134"
android:allowUndo="true"
android:textColor="#f3ca83"
android:clickable="true"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:onClick="AddNewDog"
/>
</RelativeLayout>
------------------ Error readout ------------------------ ------------------错误读出------------------------
04-07 14:06:40.998 2532-2532/cs495capstone.edu.bsu.doggydid E/AndroidRuntime: FATAL EXCEPTION: main Process: cs495capstone.edu.bsu.doggydid, PID: 2532 android.content.res.Resources$NotFoundException: Resource "cs495capstone.edu.bsu.doggydid:id/dogimage" (7f0d008e) is not a Drawable (color or path): TypedValue{t=0x12/d=0x0 a=2 r=0x7f0d008e} at android.content.res.Resources.loadDrawableForCookie(Resources.java:2390) at android.content.res.Resources.loadDrawable(Resources.java:2330) at android.content.res.Resources.getDrawable(Resources.java:758) at android.content.Context.getDrawable(Context.java:402) at android.support.v4.content.ContextCompatApi21.getDrawable(ContextCompatApi21.java:26) at android.support.v4.content.ContextCompat.getDrawable(ContextCompat.java:321) at android.support.v7.widget.TintManager.getDrawable(TintManager.java:175) at android.support.v7.widget.TintManager.getDrawable(TintManager.java:168) at android.support.v7.widget.AppCompatImageHelper.setImageResource(AppComp
2 个解决方案
解决方案1
1 2016-04-07 18:20:52
You have to pass a drawable - 您必须通过绘画-
holder.img.setImageResource(R.drawable.dogpic); holder.img1.setImageResource(R.drawable.dogpic); holder.img2.setImageResource(R.drawable.dogpic);
public static int [] dogImages={R.id.dogimage};
You are passing Id, you should pass drawable instead. 您正在传递ID，而应该传递drawable。
解决方案2
0 已采纳 2016-04-07 18:35:22
You should pass a drawable instead of id which usually represents a view.Replace your dogImage with suitable resource such as R.drawable.desired_name .Then in your getView() use it as 您应该传递一个drawable而不是通常代表一个视图的id。用适当的资源（例如R.drawable.desired_name然后在getView()中将其用作
holder.img.setimageResource(image[position])
or 要么
holder.img.setImageDrawable(ContextCompat.getDrawable(Context,image[position]))
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