open-android / PhotoImageView

一行代码实现图片手势缩放

PhotoView 图片浏览缩放控件

和普通的ImageView一样的使用方法

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效果图

1. 在你的 project 的 build.gradle 中加入

allprojects {
    repositories {

        maven { url 'https://jitpack.io' }
    }
}

2. Gradle添加依赖 (推荐)

dependencies {
     compile 'com.github.open-android:PhotoImageView:0.1.0'
}

3. xml添加

 <com.itheima.library.PhotoView
     android:id="@+id/img"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:scaleType="centerInside"
     android:src="@drawable/bitmap1" />

4. java代码

PhotoView photoView = (PhotoView) findViewById(R.id.img);
// 启用图片缩放功能
photoView.enable();
// 禁用图片缩放功能 (默认为禁用，会跟普通的ImageView一样，缩放功能需手动调用enable()启用)
photoView.disenable();
// 获取图片信息
Info info = photoView.getInfo();
// 从普通的ImageView中获取Info
Info info = PhotoView.getImageViewInfo(ImageView);

高级用法

复制如下内容到java代码中

public class PhotoBrowse extends Activity {

    int[] imgs = new int[]{R.mipmap.aaa, R.mipmap.bbb, R.mipmap.ccc, R.mipmap.ddd, R.mipmap.ic_launcher, R.mipmap.image003};

    GridView gv;

    View mParent;
    View mBg;
    PhotoView mPhotoView;
    Info mInfo;

    AlphaAnimation in = new AlphaAnimation(0, 1);
    AlphaAnimation out = new AlphaAnimation(1, 0);

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.activity_photo_browse);

        in.setDuration(300);
        out.setDuration(300);
        out.setAnimationListener(new Animation.AnimationListener() {
            @Override
            public void onAnimationStart(Animation animation) {

            }

            @Override
            public void onAnimationEnd(Animation animation) {
                mBg.setVisibility(View.INVISIBLE);
            }

            @Override
            public void onAnimationRepeat(Animation animation) {

            }
        });

        mParent = findViewById(R.id.parent);
        mBg = findViewById(R.id.bg);
        mPhotoView = (PhotoView) findViewById(R.id.img);
        mPhotoView.setScaleType(ImageView.ScaleType.CENTER_INSIDE);

        gv = (GridView) findViewById(R.id.gv);
        gv.setAdapter(new BaseAdapter() {
            @Override
            public int getCount() {
                return imgs.length;
            }

            @Override
            public Object getItem(int position) {
                return null;
            }

            @Override
            public long getItemId(int position) {
                return 0;
            }

            @Override
            public View getView(int position, View convertView, ViewGroup parent) {
                PhotoView p = new PhotoView(PhotoBrowse.this);
                p.setLayoutParams(new AbsListView.LayoutParams((int) (getResources().getDisplayMetrics().density * 100), (int) (getResources().getDisplayMetrics().density * 100)));
                p.setScaleType(ImageView.ScaleType.CENTER_CROP);
                p.setImageResource(imgs[position]);
                // 把PhotoView当普通的控件把触摸功能关掉
                p.disenable();
                return p;
            }
        });

        gv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                PhotoView p = (PhotoView) view;
                mInfo = p.getInfo();

                mPhotoView.setImageResource(imgs[position]);
                mBg.startAnimation(in);
                mBg.setVisibility(View.VISIBLE);
                mParent.setVisibility(View.VISIBLE);;
                mPhotoView.animaFrom(mInfo);
            }
        });

        mPhotoView.enable();
        mPhotoView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mBg.startAnimation(out);
                mPhotoView.animaTo(mInfo, new Runnable() {
                    @Override
                    public void run() {
                        mParent.setVisibility(View.GONE);
                    }
                });
            }
        });
    }

    @Override
    public void onBackPressed() {
        if (mParent.getVisibility() == View.VISIBLE) {
            mBg.startAnimation(out);
            mPhotoView.animaTo(mInfo, new Runnable() {
                @Override
                public void run() {
                    mParent.setVisibility(View.GONE);
                }
            });
        } else {
            super.onBackPressed();
        }
    }
}