实现将一个存放图片的集合赋值到Photoview中，并用Viewpager展示出来

MainActivity类

public class MainActivity extends AppCompatActivity {    private List<String> url=new ArrayList<>();    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        requestWindowFeature(Window.FEATURE_NO_TITLE);        setContentView(R.layout.activity_main);        TextView textView = (TextView) findViewById(R.id.tvIntent);        url.add("http://7xi8d6.com1.z0.glb.clouddn.com/2017-05-05-18251898_1013302395468665_8734429858911748096_n.jpg");        url.add("http://7xi8d6.com1.z0.glb.clouddn.com/2017-05-04-18299181_1306649979420798_1108869403736276992_n.jpg");        url.add("http://ww1.sinaimg.cn/large/61e74233ly1feuogwvg27j20p00zkqe7.jpg");        textView.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                //跳转到大图页面                new MyDialog(MainActivity.this,url).show();            }        });    }

自定义的一个viewpager类（为了避免viewpager与photoview的滑动冲突）

public class MyViewpager extends ViewPager {    public MyViewpager(Context context) {        super(context);    }    public MyViewpager(Context context, AttributeSet attrs) {        super(context, attrs);    }    @Override    public boolean onInterceptTouchEvent(MotionEvent ev) {        //为了避免viewpager与photoview的滑动冲突        try {            return super.onInterceptTouchEvent(ev);        } catch (Exception e) {            e.printStackTrace();            return false;        }    }}

Dialog类

public class MyDialog extends Dialog {    private List<String> url;    private Activity context;    public MyDialog(@NonNull Activity context, List<String> url) {        //调用系统构造方法，给dialog设置style样式       super(context,R.style.dialog_theme);        this.url=url;        this.context=context;    }    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.dialog_layout);        //拿屏幕的宽高,只有activity有getWindowManager这个方法,所有我们要强转成activity,        // dialog是挂载到activity上的,直接getContext就是他的activity        WindowManager windowManager = context.getWindowManager();        DisplayMetrics displayMetrics = new DisplayMetrics();        windowManager.getDefaultDisplay().getMetrics(displayMetrics);        int widthPixels = displayMetrics.widthPixels;        int heightPixels = displayMetrics.heightPixels;        //设置diaolog为全屏        Window window = getWindow();        WindowManager.LayoutParams attributes = window.getAttributes();        attributes.x=0;        attributes.y=0;        attributes.width=widthPixels;        attributes.height=heightPixels;        window.setAttributes(attributes);        //找到自己定义的viewpager控件        MyViewpager myViewpager = (MyViewpager) findViewById(R.id.myViewpager);        final TextView tvTitle = (TextView) findViewById(R.id.tvTitle);        MyViewpagerAdapter myViewpagerAdapter = new MyViewpagerAdapter(getContext(),url);        myViewpager.setAdapter(myViewpagerAdapter);        tvTitle.setText("1/"+url.size());        myViewpager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {            @Override            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {            }            @Override            public void onPageSelected(int position) {                tvTitle.setText(position+1+"/"+url.size());            }            @Override            public void onPageScrollStateChanged(int state) {            }        });    }}

style样式类

<resources>    <!-- Base application theme. -->    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">        <!-- Customize your theme here. -->        <item name="colorPrimary">@color/colorPrimary</item>        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>        <item name="colorAccent">@color/colorAccent</item>    </style>    <style name="dialog_theme" parent="@android:style/Theme.Dialog">        <!-- Customize your theme here. -->        <item name="android:windowBackground">@color/transparent</item>        <item name="android:background">@color/black</item>        <item name="android:backgroundDimEnabled">true</item>        <item name="android:windowIsTranslucent">true</item>    </style></resources>

colors样式类

<?xml version="1.0" encoding="utf-8"?><resources>    <color name="colorPrimary">#3F51B5</color>    <color name="colorPrimaryDark">#303F9F</color>    <color name="colorAccent">#FF4081</color>    <color name="black">#000000</color>    <color name="transparent">#00000000</color></resources>

Application类（该类需在清单文件的application标签下声明一下）

<application android:name=".app.MyApplication"></application>

该类为了配置Imageloader的全局配置

imageloader依赖了

compile 'com.nostra13.universalimageloader:universal-image-loader:1.9.5'

public class MyApplication extends Application {    @Override    public void onCreate() {        super.onCreate();        initImageLoader(this);    }    public static void initImageLoader(Context context){        String path = Environment.getExternalStorageDirectory() + "/" + "Image";        File file = new File(path);        //File cacheDir= StorageUtils.getOwnCacheDirectory(context,"universalimageloader/Cache");        ImageLoaderConfiguration configuration = new ImageLoaderConfiguration.Builder(context)                .memoryCacheExtraOptions(100, 100)//配置内存缓存图片的尺寸                .memoryCacheSize(2 * 1024 * 1024)//配置内存缓存的大小  例如 : 2* 1024 * 1024 = 2MB                .threadPoolSize(3)//配置加载图片的线程数                .threadPriority(1000)//配置线程的优先级                .diskCache(new UnlimitedDiskCache(file))//UnlimitedDiskCache 限制这个图片的缓存路径                .diskCacheSize(50 * 1024 * 1024)//在sdcard缓存50MB                .diskCacheFileNameGenerator(new Md5FileNameGenerator())//MD5这种方式生成缓存文件的名字                .diskCacheFileCount(20)//配置sdcard缓存文件的数量                .writeDebugLogs() //打印加载图片的log日志，跟据自己的需求配置                .build();//配置构建完成        ImageLoader.getInstance().init(configuration);    }}

MyViewpagerAdapter类(设置布局显示)

其中PhotoView依赖了

compile 'com.github.chrisbanes.photoview:library:+'

public class MyViewpagerAdapter extends PagerAdapter {    private Context context;    private List<String> url;    public MyViewpagerAdapter(Context context, List<String> url){        this.context=context;        this.url=url;    }    @Override    public int getCount() {        return url.size();    }    @Override    public boolean isViewFromObject(View view, Object object) {        return view==object;    }    @Override    public void destroyItem(ViewGroup container, int position, Object object) {        container.removeView((View) object);    }    @Override    public Object instantiateItem(ViewGroup container, int position) {        PhotoView photoView = new PhotoView(context);        ImageLoader.getInstance().displayImage(url.get(position),photoView);        container.addView(photoView);        return photoView;    }}