Intellij Android-活动区域的底部出现白色区域

时间：2018-09-23 20:57:49

标签： xml android-layout android-studio listview

在我的ListView活动中，活动的底部出现了一个大的白色区域，我无法弄清楚为什么以及如何修复它，至于我为什么在这里，它是一个使用arraylist中的对象的listview ，自定义适配器和xml模板，该模板在listview中填充了对象数据。希望这些信息对您有所帮助，感谢您的帮助，因为我完全迷路了。

activity_product_list.xml（列表活动）

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
        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:fitsSystemWindows="true"
        tools:context=".ProductList"
        android:orientation="vertical">

    <include layout="@layout/toolbarnormal"
             android:id="@+id/toolbar"/>

    <ScrollView
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

        <ListView
                android:id="@+id/lstProducts"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:clipToPadding="true">



        </ListView>

    </ScrollView>

</LinearLayout>

ProductListLayout.xml（模板）

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginTop="10dp"
        android:background="@color/bodyLight">

    <RelativeLayout
            android:id="@+id/relProductContainer"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@drawable/border"
            android:layout_centerHorizontal="true"
            android:layout_centerVertical="true"
            android:layout_marginTop="10dp"
>

        <ImageView
                android:id="@+id/imgProductPic"
                android:layout_width="250dp"
                android:layout_height="250dp"
                android:layout_centerHorizontal="true"
                android:src="@drawable/placeholder"
                android:padding="5dp"
        />

        <TextView
                android:id="@+id/txtProductName"
                android:layout_width="240dp"
                android:layout_height="wrap_content"
                android:text="Product name"
                android:layout_below="@+id/imgProductPic"
                android:layout_centerHorizontal="true"
                android:textSize="24sp"
                android:maxLines="2"
                android:textAllCaps="false"
                android:textAlignment="center"
                android:layout_marginTop="5dp"
        />

        <TextView
                android:id="@+id/txtProductPrice"
                android:layout_width="240dp"
                android:layout_height="wrap_content"
                android:text="£49.99"
                android:layout_below="@+id/txtProductName"
                android:layout_centerHorizontal="true"
                android:textSize="15sp"
                android:layout_marginTop="5dp"
                android:maxLines="2"
                android:textAlignment="center"
                android:textAllCaps="false"
        />


        <EditText
                android:id="@+id/etProductAmount"
                android:layout_width="70dp"
                android:layout_height="wrap_content"
                android:inputType="number"
                android:ems="10"
                android:layout_below="@+id/txtProductPrice"
                android:layout_toLeftOf="@+id/btnAddToBasket"
                android:layout_alignLeft="@+id/imgProductPic"
                android:layout_alignBottom="@id/btnAddToBasket"
                android:text="1"
                android:textAlignment="center"
        />

        <Button
                android:id="@+id/btnAddToBasket"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Add to basket"
                android:textAllCaps="true"
                android:textAlignment="center"
                android:textSize="14sp"
                android:layout_below="@+id/txtProductPrice"
                android:layout_alignRight="@+id/imgProductPic"
                android:layout_marginTop="10dp"
        />

    </RelativeLayout>

</RelativeLayout>

ProductList.java 

package com.example.jack.cbdcalculator;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ImageButton;
import android.widget.ListView;

import java.util.ArrayList;

public class ProductList extends AppCompatActivity {

    private ImageButton imgbtnBack;
    private ListView lstProducts;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_product_list);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        lstProducts = (ListView) findViewById(R.id.lstProducts);

        ArrayList<ProductObject> productObjectArrayList = new ArrayList<ProductObject>();

            ProductObject productObject = new ProductObject("Love Hemp™ 800mg 8% CBD Oil – 10ml", "A bottle contains 800MG of CBD Oil – 8% Purity in 10ml",
                "Certified Organic Hemp.\n" +
                        "Non-GMO, Vegan friendly, CO2 Extracted.\n" +
                        "Fast-Acting.\n" +
                        "Peppermint flavour available.\n" +
                        "Sourced from High-CBD Hemp cultivated in the US.\n" +
                        "Strict GMP Manufacturing & Quality Control process.\n" +
                        "Public Third-Party Lab Test Results.",
                    "https://i1.wp.com/benefitcbduk.co.uk/wp-content/uploads/2018/02/what-are-the-benefits-of-cbd.jpg?fit=1200%2C1200&ssl=1", 49.99);

        ProductObject productObject2 = new ProductObject("Koi CBD – Multi-Purpose CBD Vape or Tincture Oil (250MG-1000MG)",
                "A novel Cannabidiol product from Koi CBD, the Multi-Purpose CBD Vape E-liquid or Tincture CBD Oil. Can’t decide whether to buy Vape or CBD Oil? Why not do both?",
                " No Flavoured Additives.\n" +
                        "> Non-Psychoactive (Zero THC).\n" +
                        "> Hexane Free.\n" +
                        "> GMO Free.\n" +
                        "> Pesticide Free.\n" +
                        "> Multi-Purpose – Perfect vape juice to add to other e-liquids and ideal for use as a tincture or to add to other foods/drinks.",
                "https://i2.wp.com/benefitcbduk.co.uk/wp-content/uploads/2018/06/koi-cbd-250-gold.png?fit=1080%2C1080&ssl=1", 44.99);

            productObjectArrayList.add(productObject);
            productObjectArrayList.add(productObject2);

            ProductAdapter productAdapter = new ProductAdapter(this, R.layout.productlistlayout, productObjectArrayList);
            lstProducts.setAdapter(productAdapter);

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main_menu, menu);
        return true;
    }

    public boolean onOptionsItemSelected(MenuItem item) {
        switch(item.getItemId()) {
            case R.id.basket:
                startActivity(new Intent(this, Basket.class));
            default:
                return super.onOptionsItemSelected(item);
        }
    }

}

ProductObject.java 

package com.example.jack.cbdcalculator;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ImageButton;
import android.widget.ListView;

import java.util.ArrayList;

public class ProductList extends AppCompatActivity {

    private ImageButton imgbtnBack;
    private ListView lstProducts;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_product_list);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        lstProducts = (ListView) findViewById(R.id.lstProducts);

        ArrayList<ProductObject> productObjectArrayList = new ArrayList<ProductObject>();

            ProductObject productObject = new ProductObject("Love Hemp™ 800mg 8% CBD Oil – 10ml", "A bottle contains 800MG of CBD Oil – 8% Purity in 10ml",
                "Certified Organic Hemp.\n" +
                        "Non-GMO, Vegan friendly, CO2 Extracted.\n" +
                        "Fast-Acting.\n" +
                        "Peppermint flavour available.\n" +
                        "Sourced from High-CBD Hemp cultivated in the US.\n" +
                        "Strict GMP Manufacturing & Quality Control process.\n" +
                        "Public Third-Party Lab Test Results.",
                    "https://i1.wp.com/benefitcbduk.co.uk/wp-content/uploads/2018/02/what-are-the-benefits-of-cbd.jpg?fit=1200%2C1200&ssl=1", 49.99);

        ProductObject productObject2 = new ProductObject("Koi CBD – Multi-Purpose CBD Vape or Tincture Oil (250MG-1000MG)",
                "A novel Cannabidiol product from Koi CBD, the Multi-Purpose CBD Vape E-liquid or Tincture CBD Oil. Can’t decide whether to buy Vape or CBD Oil? Why not do both?",
                " No Flavoured Additives.\n" +
                        "> Non-Psychoactive (Zero THC).\n" +
                        "> Hexane Free.\n" +
                        "> GMO Free.\n" +
                        "> Pesticide Free.\n" +
                        "> Multi-Purpose – Perfect vape juice to add to other e-liquids and ideal for use as a tincture or to add to other foods/drinks.",
                "https://i2.wp.com/benefitcbduk.co.uk/wp-content/uploads/2018/06/koi-cbd-250-gold.png?fit=1080%2C1080&ssl=1", 44.99);

            productObjectArrayList.add(productObject);
            productObjectArrayList.add(productObject2);

            ProductAdapter productAdapter = new ProductAdapter(this, R.layout.productlistlayout, productObjectArrayList);
            lstProducts.setAdapter(productAdapter);

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main_menu, menu);
        return true;
    }

    public boolean onOptionsItemSelected(MenuItem item) {
        switch(item.getItemId()) {
            case R.id.basket:
                startActivity(new Intent(this, Basket.class));
            default:
                return super.onOptionsItemSelected(item);
        }
    }

}

ProductAdapter.java 

package com.example.jack.cbdcalculator;

public class ProductObject {

    String productName, productDescription, productExtraInfo, productImageUrl;
    Double productPrice;

    public ProductObject(String productName, String productDescription, String productExtraInfo, String productImageUrl, Double productPrice) {
        this.productName = productName;
        this.productDescription = productDescription;
        this.productExtraInfo = productExtraInfo;
        this.productImageUrl = productImageUrl;
        this.productPrice = productPrice;
    }

    public String getProductName() {
        return productName;
    }

    public void setProductName(String productName) {
        this.productName = productName;
    }

    public String getProductDescription() {
        return productDescription;
    }

    public void setProductDescription(String productDescription) {
        this.productDescription = productDescription;
    }

    public String getProductExtraInfo() {
        return productExtraInfo;
    }

    public void setProductExtraInfo(String productExtraInfo) {
        this.productExtraInfo = productExtraInfo;
    }

    public String getProductImageUrl() {
        return productImageUrl;
    }

    public void setProductImageUrl(String productImageUrl) {
        this.productImageUrl = productImageUrl;
    }

    public Double getProductPrice() {
        return productPrice;
    }

    public void setProductPrice(Double productPrice) {
        this.productPrice = productPrice;
    }
}

1 个答案:

答案 0 :(得分：0)

在您的ProductListLayout.xml中，第一个android:layout_height="match_parent"声明应该具有一个常数或其他不占用屏幕内容的大小，而不是使属性与父项匹配。现在，您看到的是空白，因为仅显示第一个元素，因为没有其他空间。尝试将其更改为200dp。

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