我只是想自己学习Android上的移动开发，因此才开始自己编写代码。为了学习，我提出了一些案例。目前，我遇到一个我似乎无法自行解决的问题，因为我还没有足够的经验：
在存货中，用户需要抓几个动物。如果用户单击动物档案，则应该有另一个页面提示您所选动物的档案信息。
当前，当我单击清单列表中的动物时。如果有人可以帮助指导我 寻求有效的解决方案？
这些是我编写的课程：
我怀疑InventoryActivity.java和AnimalProfile.java之间存在一些问题，其中在单击库存项目时，不会获取该项目的相关配置文件信息。
具体地说，我认为问题必须出在InventoryActivity.java 的以下代码段中：
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Intent newActivity;
switch (position){
case 0: newActivity = new Intent(InventoryActivity.this, AnimalProfile.class);
startActivity(newActivity);
break;
}
在我所有的代码下方：
package com.example.animalcrash;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import com.example.animalcrash.controller.DierController;
import com.example.animalcrash.model.Dier;
import java.util.ArrayList;
import java.util.Arrays;
public class InventoryActivity extends AppCompatActivity {
ListView listView;
/*int id[] = {0,1,2,3};
String mTitle[] = {"Robert", "Omer", "Mehmet", "Liza"};
String mDescription[] = {"Leeuw", "Vos", "Paard", "Rode panda"};*/
static int images[] = {R.drawable.grijsleeuw, R.drawable.grijsvos,
R.drawable.grijspaard, R.drawable.greyredpanda, R.drawable.greyredpanda};
Integer id[];
String mTitle[];
String mDescription[];
ArrayList<Integer> dId = new ArrayList<>();
ArrayList<String> dName = new ArrayList<>();
ArrayList<String> dDesc = new ArrayList<>();
ArrayList<String> dImg = new ArrayList<>();
/**
* Hieronder wordt foto's veranderd van de dieren als ze zijn gevangen
* @param id van het dier
* @param drawing het foto van het dier
*/
public static void updateImages(int id, Bitmap drawing) {
/*DierController dierController = new DierController();
Dier dier = dierController.getDierById(id);
String diernaam = dier.getNaam();
Drawable d = new BitmapDrawable(getResources(), drawing);
images[id] = drawing;*/
System.out.println("TRYING TO UPDATE THE IMAGE IN INVENTORY");
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_inventory);
listView = findViewById(R.id.myInventory);
// Omer testing
DierController dierController = new DierController();
for (Dier d: dierController.getDieren()) {
dId.add(d.getId());
dName.add(d.getNaam());
dDesc.add(d.getBeschrijving());
dImg.add(d.getAfbeelding());
}
System.out.println("TESTING THE DIER ID ARRAY:" + dId);
System.out.println("TESTING THE DIER NAME ARRAY:" + dName);
System.out.println("TESTING THE DIER DESC ARRAY:" + dDesc);
System.out.println("TESTING THE DIER IMG ARRAY:" + dImg);
id = new Integer[dId.size()];
id = dId.toArray(id);
mTitle = new String[dName.size()];
mTitle = dName.toArray(mTitle);
mDescription = new String[dDesc.size()];
mDescription = dDesc.toArray(mDescription);
System.out.println(Arrays.toString(id));
System.out.println(Arrays.toString(mTitle));
System.out.println(Arrays.toString(mDescription));
MyAdapter adapter = new MyAdapter(this, mTitle, mDescription, images, id);
listView.setAdapter(adapter);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Intent newActivity;
switch (position){
case 0: newActivity = new Intent(InventoryActivity.this, AnimalProfile.class);
startActivity(newActivity);
break;
}
}
});
}
class MyAdapter extends ArrayAdapter<String> {
Context context;
String rTitle[];
String rDescription[];
int rImgs[];
Integer rId[];
MyAdapter(Context c, String title[], String description[], int imgs[], Integer id[] ) {
super(c, R.layout.activity_detail, R.id.textView2, title);
this.context = c;
this.rTitle = title;
this.rDescription = description;
this.rImgs = imgs;
this.rId = id;
}
@NonNull
@Override
public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
LayoutInflater layoutInflater = (LayoutInflater) getApplicationContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View row = layoutInflater.inflate(R.layout.activity_detail, parent, false);
ImageView images = row.findViewById(R.id.girafGrijs);
TextView myTitle = row.findViewById(R.id.textView1);
TextView myDescrip = row.findViewById(R.id.textView2);
images.setImageResource(rImgs[position]);
myTitle.setText(rTitle[position] + " (id: " +rId[position] + ")");
myDescrip.setText(rDescription[position]);
return row;
}
}
}
package com.example.animalcrash;
import android.os.Bundle;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.widget.ImageView;
import android.widget.TextView;
public class AnimalProfile extends AppCompatActivity {
TextView profileName;
TextView levelDieren;
TextView descrip;
ImageView dierFoto;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.animal_profile);
Bundle bundle = getIntent().getExtras();
profileName = findViewById(R.id.profileName);
levelDieren = findViewById(R.id.levelDieren);
descrip = findViewById(R.id.descrip);
dierFoto = findViewById(R.id.animalProfilePhoto);
if (bundle != null) {
profileName.setText(bundle.getString("STRING_I_NEED"));
if (profileName.getText().toString().equalsIgnoreCase("Leeuw (id: 1)")){
dierFoto.setImageDrawable(ContextCompat.getDrawable(AnimalProfile.this,
R.drawable.leeuw));
} else if (profileName.getText().toString().equalsIgnoreCase("Vos (id: 2)")){
dierFoto.setImageDrawable(ContextCompat.getDrawable(AnimalProfile.this,
R.drawable.vos));
} else if (profileName.getText().toString().equalsIgnoreCase("Paard (id: 3)")){
dierFoto.setImageDrawable(ContextCompat.getDrawable(AnimalProfile.this,
R.drawable.paard));
} else if (profileName.getText().toString().equalsIgnoreCase("Rode Panda (id: 4)")){
dierFoto.setImageDrawable(ContextCompat.getDrawable(AnimalProfile.this,
R.drawable.redpanda));
} else if (profileName.getText().toString().equalsIgnoreCase("Neushoorn (id: 5)")){
dierFoto.setImageDrawable(ContextCompat.getDrawable(AnimalProfile.this,
R.drawable.neushoorn));
}
}
}
}
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:id="@+id/dierProfiel"
android:padding="16dp"
tools:context=".AnimalProfile">
<ImageView
android:id="@+id/animalProfilePhoto"
android:layout_width="550dp"
android:layout_height="550dp"
android:layout_marginStart="8dp"
android:layout_marginTop="32dp"
android:contentDescription="@string/animalProfilePhoto"
android:src="@drawable/standaardanimal"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<LinearLayout
android:layout_width="494dp"
android:layout_height="216dp"
android:layout_marginStart="36dp"
android:layout_marginTop="8dp"
android:layout_marginBottom="8dp"
android:orientation="vertical"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/animalProfilePhoto"
app:layout_constraintVertical_bias="1.0"
tools:ignore="MissingConstraints">
<TextView
android:id="@+id/profileName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:orientation="vertical"
android:text="@string/naam"
android:textColor="#000"
android:textSize="30sp"
android:textStyle="bold" />
<TextView
android:id="@+id/levelDieren"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:orientation="vertical"
android:text="@string/level"
android:textColor="#000"
android:textSize="24sp"
android:textStyle="normal" />
<TextView
android:id="@+id/descrip"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:text="@string/description"
android:textColor="#000"
android:textSize="20sp"
android:textStyle="italic"
/>
</LinearLayout>
<android.support.constraint.Guideline
android:id="@+id/guideline"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_begin="27dp" />
</android.support.constraint.ConstraintLayout>
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/layOutPerDier"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:padding="16dp"
tools:context=".InventoryActivity">
<ImageView
android:id="@+id/girafGrijs"
android:layout_width="75dp"
android:layout_height="75dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:contentDescription="@string/grijsgiraf"
android:src="@drawable/girafgrijs"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<LinearLayout
android:layout_width="494dp"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:orientation="vertical"
app:layout_constraintStart_toEndOf="@+id/girafGrijs"
tools:ignore="MissingConstraints"
tools:layout_editor_absoluteY="7dp">
<TextView
android:id="@+id/textView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:text="@string/naam"
android:textStyle="bold"
android:textColor="#000"
android:textSize="20sp" />
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:text="@string/description"
android:textColor="#181F46"
android:textStyle="italic"
android:textSize="20sp" />
</LinearLayout>
<android.support.constraint.Guideline
android:id="@+id/guideline"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_begin="27dp" />
</android.support.constraint.ConstraintLayout>