我需要通过地图方法从我的图像文件动态导入图像(几个)。首先,我想为图像文件设置一个基本URL,然后从包含image属性的JSON文件中读取图像的名称,然后相应地设置图像src。JSON文件如下所示:
{
"title": "Blue Stripe Stoneware Plate",
"brand": "Kiriko",
"price": 40,
"description": "Lorem ipsum dolor sit amet...",
"image": "blue-stripe-stoneware-plate.jpg"
},
{
"title": "Hand Painted Blue Flat Dish",
"brand": "Kiriko",
"price": 28,
"description": "Lorem ipsum dolor sit amet...",
"image": "hand-painted-blue-flat-dish.jpg"
},
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我已经阅读了redux的产品,它非常适合=>
const products = this.props.products;
console.log(products, 'from redux');
const fetchProducts = [];
for (let key in products) {
fetchProducts.push({
...products[key]
});
}
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现在,我想定义一个像这样的基本URL,稍后通过在map方法中添加JSON文件中的图像名称来用作图像src:
const baseUrl = '../../components/assets/images/';
const fetchProducts = [];
for (let key in products) {
fetchProducts.push({ …Run Code Online (Sandbox Code Playgroud) 我是android中的新手,我想将db中的数据获取到textview。
但有错误,我无法纠正此问题。
请帮我。
这是数据库类
public class blockornot1 {
String TAG;
private dbHelper1 ourHelper;
private final Context ourContext;
private SQLiteDatabase ourDatabese;
public final static String DATABASE_NAME1="databasename.db";
public final String DATABASE_TABLE="numbersTable";
public final String KEY_NAME="personname";
public final String KEY_ID="id";
public final int DATABASE_VERSION =2;
public class dbHelper1 extends SQLiteOpenHelper{
public dbHelper1 (Context context) {
super (context,DATABASE_NAME1,null,DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("CREATE TABLE "+ DATABASE_TABLE+ "("+KEY_ID+ " INTEGER PRIMARY KEY AUTOINCREMENT, "
+ KEY_NAME + "TEXT NOT NULL);");
Log.v(TAG, "creat"); …Run Code Online (Sandbox Code Playgroud) android ×1
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