MainActivity.java
package test.com.myimageview;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.ImageSwitcher;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.ViewSwitcher;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity {
List<Drawable> drawableList = new ArrayList<Drawable>();//存放图片
TextView arrowLeftTextView;//左箭头
TextView arrowRightTextView;//右箭头
private int index=0;//
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
drawableList.add(getResources().getDrawable(R.drawable.image01));//图片01
drawableList.add(getResources().getDrawable(R.drawable.image02));//图片02
drawableList.add(getResources().getDrawable(R.drawable.image03));//图片03
drawableList.add(getResources().getDrawable(R.drawable.image04));//图片04
final ImageSwitcher imageSwitcher = findViewById(R.id.imageSwitcher_is);
arrowLeftTextView = findViewById(R.id.arrow_left_iv);
arrowRightTextView = findViewById(R.id.arrow_right_iv);
//工厂
imageSwitcher.setFactory(new ViewSwitcher.ViewFactory() {
@Override
public View makeView() {
return new ImageView(MainActivity.this);
}
});
imageSwitcher.setImageDrawable(drawableList.get(index++));//初始化显示第一张图片
arrowLeftTextView.setOnClickListener(new View.OnClickListener(){//左箭头单击事件
@Override
public void onClick(View view)
{
imageSwitcher.setImageDrawable(drawableList.get(index--));
if(index<0)//如果到达了图片的开始,则直接显示最后一张图片
{
index = drawableList.size()-1;
}
}
});
arrowRightTextView.setOnClickListener(new View.OnClickListener(){//右箭头单击事件
@Override
public void onClick(View view)
{
imageSwitcher.setImageDrawable(drawableList.get(index++));
if(index>=drawableList.size())//如果点击到达图片的末尾,则回到第一张图片
{
index = 0;
}
}
});
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center">
<TextView
android:id="@+id/arrow_left_iv"
android:layout_width="50dp"
android:layout_height="50dp"
android:text="<"
android:gravity="center"/>
<ImageSwitcher
android:id="@+id/imageSwitcher_is"
android:layout_width="150dp"
android:layout_height="150dp"/>
<TextView
android:id="@+id/arrow_right_iv"
android:layout_width="50dp"
android:layout_height="50dp"
android:text=">"
android:gravity="center"/>
</LinearLayout>
</android.support.design.widget.CoordinatorLayout>