java-将Onclick()添加到ArrayList中的项目
2020年01月20日
作者:佚名
我创建了一个由多个项目(图像和文本)组成的水平滚动,但是如何向这些项目中的每个事件添加点击事件.
我已经按照本教程来了解自己的位置:
https://www.youtube.com/watch?v=sTJm1Ys9jMI
MainActivity.java:
CarouselPicker carouselPicker1,carouselPicker2,carouselPicker3; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); carouselPicker1 = (CarouselPicker) findViewById(R.id.carouselPicker1); carouselPicker2 = (CarouselPicker) findViewById(R.id.carouselPicker2); carouselPicker3 = (CarouselPicker) findViewById(R.id.carouselPicker3); //Carousel 1 with all images List<CarouselPicker.PickerItem> itemsImages = new ArrayList<>(); itemsImages.add(new CarouselPicker.DrawableItem(R.mipmap.ic_launcher)); itemsImages.add(new CarouselPicker.DrawableItem(R.mipmap.ic_launcher_round)); itemsImages.add(new CarouselPicker.DrawableItem(R.mipmap.ic_launcher)); itemsImages.add(new CarouselPicker.DrawableItem(R.mipmap.ic_launcher)); itemsImages.add(new CarouselPicker.DrawableItem(R.mipmap.ic_launcher)); itemsImages.add(new CarouselPicker.DrawableItem(R.mipmap.ic_launcher)); itemsImages.add(new CarouselPicker.DrawableItem(R.mipmap.ic_launcher)); itemsImages.add(new CarouselPicker.DrawableItem(R.mipmap.ic_launcher)); itemsImages.add(new CarouselPicker.DrawableItem(R.mipmap.ic_launcher)); itemsImages.add(new CarouselPicker.DrawableItem(R.mipmap.ic_launcher)); itemsImages.add(new CarouselPicker.DrawableItem(R.mipmap.ic_launcher)); itemsImages.add(new CarouselPicker.DrawableItem(R.mipmap.ic_launcher)); itemsImages.add(new CarouselPicker.DrawableItem(R.mipmap.ic_launcher)); itemsImages.add(new CarouselPicker.DrawableItem(R.mipmap.ic_launcher)); CarouselPicker.CarouselViewAdapter imageAdapter = new CarouselPicker.CarouselViewAdapter(this,itemsImages,0); carouselPicker1.setAdapter(imageAdapter); //Carousel 2 with all text List<CarouselPicker.PickerItem> textItems = new ArrayList<>(); textItems.add(new CarouselPicker.TextItem("One",20)); textItems.add(new CarouselPicker.TextItem("Two",20)); textItems.add(new CarouselPicker.TextItem("Three",20)); CarouselPicker.CarouselViewAdapter textAdapter = new CarouselPicker.CarouselViewAdapter(this,textItems,0); carouselPicker2.setAdapter(textAdapter); //Carousel 3 with both List<CarouselPicker.PickerItem> mixItems = new ArrayList<>(); mixItems.add(new CarouselPicker.TextItem("One",20)); mixItems.add(new CarouselPicker.DrawableItem(R.mipmap.ic_launcher_round)); mixItems.add(new CarouselPicker.TextItem("Three",20)); mixItems.add(new CarouselPicker.DrawableItem(R.mipmap.ic_launcher)); CarouselPicker.CarouselViewAdapter mixAdapter = new CarouselPicker.CarouselViewAdapter(this,mixItems,0); carouselPicker3.setAdapter(mixAdapter);
Activity_Main.xml:
<?xml version="1.0" encoding="utf-8"?> <LinearLayout 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:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" tools:context="MainActivity"> <in.goodiebag.carouselpicker.CarouselPicker android:id="@+id/carouselPicker1" android:layout_marginTop="20dp" android:layout_marginBottom="20dp" android:background="#FFF" android:layout_width="match_parent" android:layout_height="wrap_content" app:items_visible="three" /> <in.goodiebag.carouselpicker.CarouselPicker android:id="@+id/carouselPicker2" android:layout_marginTop="20dp" android:layout_marginBottom="20dp" android:background="#FFF" android:layout_width="match_parent" android:layout_height="wrap_content" app:items_visible="three" /> <in.goodiebag.carouselpicker.CarouselPicker android:id="@+id/carouselPicker3" android:layout_marginTop="20dp" android:layout_marginBottom="20dp" android:background="#FFF" android:layout_width="match_parent" android:layout_height="wrap_content" app:items_visible="three" /> </LinearLayout>
Gradle脚本:
dependencies { implementation fileTree(dir: 'libs',include: ['*.jar']) implementation 'com.android.support:appcompat-v7:28.0.0' implementation 'com.android.support.constraint:constraint-layout:1.1.3' testImplementation 'junit:junit:4.12' androidTestImplementation 'com.android.support.test:runner:1.0.2' androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2' //add Library implementation "com.github.Vatican-Cameos:CarouselPicker:v1.0" } allprojects { repositories { google() jcenter() maven { url 'https://jitpack.io'} } }
如何为MainActivy.java中显示的每个图像添加按钮功能?
这是MainActivity中的新代码:
package com.example.carouselpicker; import android.support.v4.view.ViewPager; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Toast; import java.util.ArrayList; import java.util.List; import in.goodiebag.carouselpicker.CarouselPicker; public class MainActivity extends AppCompatActivity { CarouselPicker carouselPicker1,carouselPicker3; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); carouselPicker1 = findViewById(R.id.carouselPicker1); carouselPicker2 = findViewById(R.id.carouselPicker2); carouselPicker3 = findViewById(R.id.carouselPicker3); //Carousel 1 with all images List<CarouselPicker.PickerItem> itemsImages = new ArrayList<>(); itemsImages.add(new CarouselPicker.DrawableItem(R.mipmap.ic_launcher)); itemsImages.add(new CarouselPicker.DrawableItem(R.mipmap.ic_launcher_round)); itemsImages.add(new CarouselPicker.DrawableItem(R.mipmap.ic_launcher)); itemsImages.add(new CarouselPicker.DrawableItem(R.mipmap.ic_launcher)); itemsImages.add(new CarouselPicker.DrawableItem(R.mipmap.ic_launcher)); itemsImages.add(new CarouselPicker.DrawableItem(R.mipmap.ic_launcher)); itemsImages.add(new CarouselPicker.DrawableItem(R.mipmap.ic_launcher)); itemsImages.add(new CarouselPicker.DrawableItem(R.mipmap.ic_launcher)); itemsImages.add(new CarouselPicker.DrawableItem(R.mipmap.ic_launcher)); itemsImages.add(new CarouselPicker.DrawableItem(R.mipmap.ic_launcher)); itemsImages.add(new CarouselPicker.DrawableItem(R.mipmap.ic_launcher)); itemsImages.add(new CarouselPicker.DrawableItem(R.mipmap.ic_launcher)); itemsImages.add(new CarouselPicker.DrawableItem(R.mipmap.ic_launcher)); itemsImages.add(new CarouselPicker.DrawableItem(R.mipmap.ic_launcher)); CarouselPicker.CarouselViewAdapter imageAdapter = new CarouselPicker.CarouselViewAdapter(this,0); carouselPicker3.setAdapter(mixAdapter); carouselPicker1.addOnPageChangeListener(new ViewPager.OnPageChangeListener() { @Override public void onPageScrolled(int position,float positionOffset,int positionOffsetPixels) { } @Override public void onPageSelected(int position) { //position of the selected item switch (position) { case 0: Toast toast = Toast.makeText(getApplicationContext(),"This is a message displayed in a Toast",Toast.LENGTH_SHORT); toast.show(); break; case 1: Toast oast = Toast.makeText(getApplicationContext(),Toast.LENGTH_SHORT); oast.show(); break; case 2: // do smth else break; //case 3,etc... } } @Override public void onPageScrollStateChanged(int state) { } }); } }
最佳答案
您应该按照此处的说明进行操作:
https://github.com/GoodieBag/CarouselPicker
为每个轮播选择器设置侦听器,然后为每个位置的特定逻辑使用开关盒:
carouselPicker.addOnPageChangeListener(new ViewPager.OnPageChangeListener() { @Override public void onPageScrolled(int position,int positionOffsetPixels) { } @Override public void onPageSelected(int position) { //position of the selected item switch (position) { case 0: //do smth Toast.makeText(MainActivity.this,"first item selected",Toast.LENGTH_SHORT).show(); break; case 1: // do smth else Toast.makeText(MainActivity.this,"second item selected",Toast.LENGTH_SHORT).show(); break; //case 3,etc... } } @Override public void onPageScrollStateChanged(int state) { } });
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