java - Android-Listview setOnItemClickListener 错误

Question

我有 MenuActivity，有显示餐厅菜单的 ListView ，它使用称为 FoodAdapter 的适配器。它有效，我正在尝试制作菜单的详细信息，如果您单击菜单，则会出现包含食物详细信息的 FoodDetailActivity。

MenuActivity ListView 单击 > FoodDetailActivity 显示食物详细信息。

但问题出现了，当我点击菜单 ListView 上的项目时，空白屏幕出现大约 500 毫秒，然后返回到 MainActivity。我的假设是我在 MenuActivity.java 上这段代码的 putExtra Intent 中可能做错了什么，或者我的手机不支持布局。

orderListView.setOnItemClickListener(new AdapterView.OnItemClickListener(){
            @Override
            public void onItemClick(AdapterView<?>parent, View view, int position, long id) {
                Intent i = new Intent(MenuActivity.this, FoodDetailActivity.class);
                Food currentFood = foods.get(position);
                //Log.e("FOOD NAME", currentFood.getFoodName());
                i.putExtra("name", currentFood.getFoodName());
                i.putExtra("image", currentFood.getmImageResource());
                i.putExtra("price", currentFood.getFoodPrice());
                i.putExtra("type", currentFood.getType());
                startActivityForResult(i, REQUEST_CODE);

            }

这里是完整的MenuActivity.java代码

public class MenuActivity extends AppCompatActivity {
    public static final int REQUEST_CODE = 1;
    FoodAdapter adapter;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_menu);
        //arraylist to make model array from Food class
        final ArrayList<Food> foods = new ArrayList<>();
        foods.add(new Food("AYAM BAKAR", "Ayam Bakar pak budi", R.drawable.a1, 50000));
        foods.add(new Food("AYAM GORENG", "Ayam Bakar pak budi", R.drawable.a2, 50000));
        foods.add(new Food("AYAM REBUS", "Ayam Bakar pak budi", R.drawable.a3, 50000));
        foods.add(new Food("AYAM KECAP", "Ayam Bakar pak budi", R.drawable.a4, 50000));

        adapter = new FoodAdapter(this, foods);
        ListView orderListView = (ListView) findViewById(R.id.order_list_view);
        orderListView.setAdapter(adapter);
        orderListView.setOnItemClickListener(new AdapterView.OnItemClickListener(){
            @Override
            public void onItemClick(AdapterView<?>parent, View view, int position, long id) {
                Intent i = new Intent(MenuActivity.this, FoodDetailActivity.class);
                Food currentFood = foods.get(position);
                //Log.e("FOOD NAME", currentFood.getFoodName());
                i.putExtra("name", currentFood.getFoodName());
                i.putExtra("image", currentFood.getmImageResource());
                i.putExtra("price", currentFood.getFoodPrice());
                i.putExtra("type", currentFood.getType());
                startActivityForResult(i, REQUEST_CODE);

            }
        });

    }

这里是 FoodDetailActivity.java

public class FoodDetailActivity extends AppCompatActivity {
    private int item = 0;
    private int price = 0;
    TextView sumTextView;
    TextView priceTotalTextView;
    TextView txtName, txtQuantity, txtPrice;
    Button btnAdd, btnCart;
    public static SQLiteOpenHelper sqLiteHelper;
    public static String DATABASENAME = "cartDB.db";
    public static String TABLENAME = "cart";
    public static String ID = "id";
    public static String NAME = "name";
    public static String QUANTITY = "quantity";
    public static String PRICE = "price";
    SQLiteDatabase db;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_food_detail);
        init();
String name = getIntent().getStringExtra("name");
        String type1 = getIntent().getStringExtra("type");
        int image;
        image = getIntent().getIntExtra("image", -1);
        price = getIntent().getIntExtra("price", -1);
        //Log.e("SECOND ACTIVITY", name);

        TextView nameTextView = (TextView) findViewById(R.id.food_name_text_view);
        nameTextView.setText(name);
        TextView type = (TextView) findViewById(R.id.type);
        type.setText(type1);
        ImageView imageView = (ImageView) findViewById(R.id.food_image);
        imageView.setImageResource(image);
        imageView.setVisibility(View.VISIBLE);
        TextView priceTextView = (TextView) findViewById(R.id.price_detail_text_view);
        priceTextView.setText(Integer.toString(price));

        sumTextView = (TextView)findViewById(R.id.sum_text_view);
        priceTotalTextView = (TextView) findViewById(R.id.price_total_text_view);
        Button incrementButton = (Button) findViewById(R.id.increment_button);
        incrementButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                increment();
            }
        });
        Button decrementButton = (Button) findViewById(R.id.decrement_button);
        decrementButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                decrement();
            }
        });
    }
    private void init(){
        txtName = findViewById(R.id.food_name_text_view);
        txtQuantity = findViewById(R.id.sum_text_view);
        txtPrice = findViewById(R.id.price_total_text_view);
        btnAdd = findViewById(R.id.order_button);
        btnCart = findViewById(R.id.cart_button);

    }
    private void increment(){
        item++;
        sumTextView.setText(Integer.toString(item));
        priceTotalTextView.setText(Integer.toString(sumOfProduct(price)));
    }
    private void decrement(){
        if (item<1){
            Toast.makeText(this, "Maaf Order Minimal 1", Toast.LENGTH_SHORT).show();
            return;
        }
        item = item-1;
        sumTextView.setText(Integer.toString(item));
        priceTotalTextView.setText(Integer.toString(sumOfProduct(price)));
    }
    private int sumOfProduct(int price){

        return item*price;
    }
}

这是错误日志，我不知道应该显示哪一个:

2019-12-26 18:11:21.255 24053-24053/? E/libc: Access denied finding property "persist.vendor.sys.activitylog"
2019-12-26 18:11:21.992 24053-24122/com.rifinew.rumahpohon E/OpenGLRenderer: Device claims wide gamut support, cannot find matching config, error = EGL_SUCCESS
2019-12-26 18:11:22.025 24053-24122/com.rifinew.rumahpohon E/ion: ioctl c0044901 failed with code -1: Invalid argument

//when i click on listview to get detail listview activity
2019-12-26 18:12:58.736 24187-24187/? E/libc: Access denied finding property "persist.vendor.sys.activitylog"
2019-12-26 18:12:58.745 24187-24203/? E/inew.rumahpoho: Failed to send DDMS packet REAQ to debugger (-1 of 20): Broken pipe
2019-12-26 18:12:59.140 24187-24257/? E/OpenGLRenderer: Device claims wide gamut support, cannot find matching config, error = EGL_SUCCESS
2019-12-26 18:12:59.197 24187-24257/? E/ion: ioctl c0044901 failed with code -1: Invalid argument
<br><br>
//and this one too
2019-12-26 18:33:59.065 26392-26392/? E/libc: Access denied finding property "persist.vendor.sys.activitylog"
2019-12-26 18:34:02.040 26392-26392/com.rifinew.rumahpohon E/ANR_LOG: >>> msg's executing time is too long
2019-12-26 18:34:02.040 26392-26392/com.rifinew.rumahpohon E/ANR_LOG: Blocked msg = { when=-2s949ms what=110 target=android.app.ActivityThread$H obj=AppBindData{appInfo=ApplicationInfo{98d9e1e com.rifinew.rumahpohon}} } , cost  = 2929 ms
2019-12-26 18:34:02.040 26392-26392/com.rifinew.rumahpohon E/ANR_LOG: >>>Current msg List is:
2019-12-26 18:34:02.042 26392-26392/com.rifinew.rumahpohon E/ANR_LOG: Current msg <1>  = { when=-2s945ms what=159 target=android.app.ActivityThread$H obj=ClientTransaction hashCode, mActivityToken = android.os.BinderProxy@ada6ff }
2019-12-26 18:34:02.043 26392-26392/com.rifinew.rumahpohon E/ANR_LOG: Current msg <2>  = { when=-2s688ms what=149 target=android.app.ActivityThread$H obj=android.os.BinderProxy@ada6ff }
2019-12-26 18:34:02.043 26392-26392/com.rifinew.rumahpohon E/ANR_LOG: >>>CURRENT MSG DUMP OVER<<<
2019-12-26 18:34:02.545 26392-26426/com.rifinew.rumahpohon E/OpenGLRenderer: Device claims wide gamut support, cannot find matching config, error = EGL_SUCCESS
2019-12-26 18:34:02.605 26392-26426/com.rifinew.rumahpohon E/ion: ioctl c0044901 failed with code -1: Invalid argument
//begining of the crash
    --------- beginning of crash
E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.rifinew.rumahpohon, PID: 26392
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.rifinew.rumahpohon/com.rifinew.rumahpohon.FoodDetailActivity}: android.view.InflateException: Binary XML file line #149: Attempt to invoke virtual method 'boolean java.lang.String.equals(java.lang.Object)' on a null object reference
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3181)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3318)
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:113)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:71)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2044)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:226)
        at android.app.ActivityThread.main(ActivityThread.java:7212)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:576)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:956)
     Caused by: android.view.InflateException: Binary XML file line #149: Attempt to invoke virtual method 'boolean java.lang.String.equals(java.lang.Object)' on a null object reference
     Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.equals(java.lang.Object)' on a null object reference
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:784)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:750)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:900)
        at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:861)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:903)
        at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:861)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:903)
        at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:861)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
        at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:469)
        at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
        at com.rifinew.rumahpohon.FoodDetailActivity.onCreate(FoodDetailActivity.java:40)
        at android.app.Activity.performCreate(Activity.java:7378)
        at android.app.Activity.performCreate(Activity.java:7369)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1271)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3161)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3318)
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:113)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:71)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2044)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:226)
        at android.app.ActivityThread.main(ActivityThread.java:7212)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:576)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:956)

XML activity_food_detail.xml 有点复杂我觉得把代码放在这里不好。我做错了什么？

Answer 1

问题是我不知道为什么，但是 XML

<!-- <view
                android:layout_width="1dp"
                android:layout_height="match_parent"
                android:layout_marginTop="10dp"
                android:layout_marginBottom="10dp"
                android:background="@color/colorPrimary"/>-->

绘制一条小线的 VIEW 标签不知何故导致我的手机崩溃，感谢@unownsp 帮助我解决了这个错误