Android ImageSwitcher 使用示例

单元格布局文件内容 res\layout\cell.xml

<?xml version="1.0" encoding="utf-8"?>
<ImageView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/cellImage"
    android:layout_width="80dp"
    android:layout_height="80dp"
    android:scaleType="fitCenter"
    />

主布局文件内容：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/colorGray"
    android:orientation="vertical"
    >

    <GridView
        android:id="@+id/gridView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:horizontalSpacing="2pt"
        android:verticalSpacing="2pt"
        android:numColumns="4"
        android:gravity="center"
        />

    <ImageSwitcher
        android:id="@+id/imageSwitcher"
        android:layout_width="300dp"
        android:layout_height="300dp"
        android:layout_gravity="center_horizontal"
        android:inAnimation="@android:anim/fade_in"
        android:outAnimation="@android:anim/fade_out"
        android:layout_marginTop="40dp"
        />

</LinearLayout>

主程序代码内容：

package com.toby.personal.testlistview;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.GridView;
import android.widget.ImageSwitcher;
import android.widget.ImageView;
import android.widget.SimpleAdapter;
import android.widget.ViewSwitcher;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class MainActivity extends AppCompatActivity {

    final private static String TAG = "Toby_Test";


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        final int[] imageIds = new int[]{
                R.drawable.img01, R.drawable.img02, R.drawable.img03, R.drawable.img04,
                R.drawable.img05, R.drawable.img06, R.drawable.img07, R.drawable.img08,
                R.drawable.img09, R.drawable.img10, R.drawable.img11, R.drawable.img12
        };

        List<Map<String, Object>> listItems = new ArrayList<>();

        for (int i = 0; i < imageIds.length; ++i) {
            Map<String, Object> listItem = new HashMap<>();
            listItem.put("image", imageIds[i]);
            listItems.add(listItem);
        }

        final ImageSwitcher imageSwitcher = (ImageSwitcher) findViewById(R.id.imageSwitcher);

        imageSwitcher.setFactory(new ViewSwitcher.ViewFactory() {
            @Override
            public View makeView() {
                ImageView imageView = new ImageView(MainActivity.this);
                imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
                imageView.setLayoutParams(new ImageSwitcher.LayoutParams(
                        ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT ));
                return imageView;
            }
        });

        GridView gridView = (GridView) findViewById(R.id.gridView);

        SimpleAdapter simpleAdapter = new SimpleAdapter(this, listItems, R.layout.cell,
                new String[] { "image" }, new int[] {R.id.cellImage});

        gridView.setAdapter(simpleAdapter);

        gridView.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                imageSwitcher.setImageResource(imageIds[position]);
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {
            }
        });

        gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                imageSwitcher.setImageResource(imageIds[position]);
            }
        });

    }

}

程序运行效果图：

ImageSwitcher 使用示例

参考文献：《疯狂Android讲义（第2版）》