自定义行listview适配器崩溃

Question

我尝试按照幻灯片youtube 6部分教程创建一个带有自定义行的列表视图。在他的教程中，他使用了1个图像和2个文本视图，我需要3个图像和3个文本视图，当我运行应用程序时，它在尝试加载列表视图时崩溃。

-------------家庭单行.xml-----------------------

<?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="vertical">

<TextView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="Lilly"
    android:textColor="#2c7134"
    android:textStyle="bold"
    android:id="@+id/dogName"
    android:textSize="24dp" />

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">

    <ImageButton
        android:id="@+id/dogimage"
        android:layout_width="150dip"
        android:layout_height="150dip"
        android:layout_alignParentLeft="true"
        android:clickable="true"
        android:onClick="sendProfile"
        android:scaleType="fitXY"
        android:src="@drawable/lilly"
        android:background="?attr/selectableItemBackground" />

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom"
        android:orientation="vertical">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Timestamp 1"
            android:textColor="#2c7134"
            android:id="@+id/timestamp1"/>

        <ImageButton
            android:id="@+id/dog1num1"
            android:layout_width="75dip"
            android:layout_height="75dip"
            android:layout_marginLeft="10dp"
            android:clickable="true"
            android:onClick="NumberOne"
            android:scaleType="fitXY"
            android:src="@drawable/num1"
            android:background="?attr/selectableItemBackground" />

    </LinearLayout>

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom"
        android:orientation="vertical">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Timestamp 1"
            android:textColor="#2c7134"
            android:id="@+id/timestamp2"/>

        <ImageButton
            android:id="@+id/dog1num2"
            android:layout_width="75dip"
            android:layout_height="75dip"
            android:layout_marginLeft="10dp"
            android:clickable="true"
            android:onClick="NumberOne"
            android:scaleType="fitXY"
            android:src="@drawable/num2"
            android:background="?attr/selectableItemBackground"/>

    </LinearLayout>

</LinearLayout>
</LinearLayout>

- Homelistview.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"
xmlns:app="http://schemas.android.com/apk/res-auto"
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:textColor="#2c7134"
    android:text="Select a profile or make a post:"
    android:layout_alignParentTop="true"
    android:layout_alignParentStart="true" />

<ListView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/listView"
    android:entries="@array/dogs"
    android:layout_below="@id/selectprofiletext"
    android:layout_above="@+id/newdogbutton" />

<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:onClick="AddNewDog"
    android:layout_alignParentBottom="true"
    android:layout_alignParentStart="true" />

</RelativeLayout>

Homeactivitylistview.java

public class HomeActivityListview extends AppCompatActivity {

    ListView list;
    Context context;
    ArrayList dogName;
    ArrayList dogID;
    int [] dogImages = {R.drawable.lilly, R.drawable.dogpic};
    public static int [] dogNames={R.id.dogName, R.id.dogName};
    int [] num1={R.id.dog1num1, R.id.dog1num1, R.id.dog1num1, R.id.dog1num1, R.id.dog1num1};
    int [] num2={R.id.dog1num2, R.id.dog1num2, R.id.dog1num2, R.id.dog1num2, R.id.dog1num2};
    String[] names;
    String[] timestamp1;
    String[] timestamp2;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_home_activity_listview);

        Resources res = getResources();
        names=res.getStringArray(R.array.names);
        timestamp1=res.getStringArray(R.array.timestamps1);
        timestamp2=res.getStringArray(R.array.timestamps2);
        context=this;

        list =(ListView) findViewById(R.id.listView);
        dogAdapter adapter=new dogAdapter(this, names, dogImages, num1, num2, timestamp1, timestamp2);
        list.setAdapter(adapter);
    }

class dogAdapter extends ArrayAdapter<String>
{
    Context context;
    int[] dogImages;
    int[] num1;
    int[] num2;
    String[] nameArray;
    String[] timestamp1Array;
    String[] timestamp2Array;
    dogAdapter(Context c, String[] names, int imgs[], int numb1[], int numb2[], String[] time1, String[] time2)
    {
        super(c,R.layout.home_single_row,R.id.dogName,names);
        this.context=c;
        this.dogImages=imgs;
        this.num1=numb1;
        this.num2=numb2;
        this.nameArray=names;
        this.timestamp1Array=time1;
        this.timestamp2Array=time2;
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        LayoutInflater inflater= (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View row=inflater.inflate(R.layout.home_single_row,parent, false);

        ImageView dogImg=(ImageView) row.findViewById(R.id.dogimage);
        ImageView img1=(ImageView) row.findViewById(R.id.dog1num1);
        ImageView img2=(ImageView) row.findViewById(R.id.dog1num2);
        TextView name=(TextView) row.findViewById(R.id.dogName);
        TextView time1=(TextView) row.findViewById(R.id.timestamp1);
        TextView time2=(TextView) row.findViewById(R.id.timestamp2);

        dogImg.setImageResource(dogImages[position]);
        img1.setImageResource(dogImages[position]);
        img2.setImageResource(dogImages[position]);
        name.setText(nameArray[position]);
        time1.setText(timestamp1Array[position]);
        time2.setText(timestamp2Array[position]);

        return row;
    }
}



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);
    }


}

04-22 15:49:36.597 28628-28628/cs495capstone.edu.bsu.doggydid E/Android runtime:致命异常:主进程:cs 495 capstone . edu . bsu . doggydid， PID:28628 Java . lang . out of memory error:无法分配4194316字节分配738608可用字节和721KB直到OOM在dal vik . system . VM runtime . newnonmovablearray(本机方法)在Android . graphics . bitmapfactory . bitmapfactory . decodestream(本机方法)在Android . graphics . bitmapfactory . Java:856 . decodestream(bitmapfactory . Java:856 在Android . widget . listview . measureheightofchildren(listview . Java:1305)在Android . widget . listview . on measure(listview . Java:1212)在Android . view . view . measure(view . Java:20151)在Android . widget . relative layout . measure child horizontal(relative layut . Java:716)在Android . widget . relative layout . on measure(relative layout . Java:462)在Android . view . view . view . measure(view

Answer 1

你错过了：

 list.setAdapter(dogAdapter);

setAdapter（）设置此ListView后面的数据。传递给此方法的适配器可以由WrapperListAdapter包装，具体取决于当前使用的ListView功能。例如，添加页眉和/或页脚将导致适配器被换行。

我认为视频中没有解释这一点！

//Get ListView reference.
list =(ListView) findViewById(R.id.listView);
//create the Adapter instance.
dogAdapter adapter=new dogAdapter(this, names, dogImages, num1, num2, timestamp1, timestamp2);
//Set the adapter to the ListView!
list.setAdapter(dogAdapter);