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

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;
    }
}