Question

我正在尝试制作网格视图库应用。当用户单击图像时，将显示完整图像。我无法理解如何实现ImageSlider并将图像保存到现有项目中的库中。

这是MainActivity：

public class MainActivity extends AppCompatActivity {

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


        GridView gridView = (GridView) findViewById(R.id.grid);
        gridView.setAdapter(new ImageAdapter(this));

        gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                Intent i = new Intent(getApplicationContext(),FullImageActivity.class);
                i.putExtra("id", position);
                startActivity(i);
            }
        });
    }

这是我的ImageAdapter，其中包含图片：

public class ImageAdapter extends BaseAdapter {
   ImageView imageView;

    private Context context;

    public String Images[] =  {("http://www.fashionlady.in/wp-content/uploads/2016/03/creative-punjabi-mehndi-design-2016.jpg"),
            ("https://lumiere-a.akamaihd.net/v1/images/uk_toystory_chi_woody_n_5b5a006f.png?region=0,0,300,300"),
            ("https://lumiere-a.akamaihd.net/v1/images/open-uri20150422-20810-10n7ovy_9b42e613.jpeg"),
            ("http://www.wetpaint.com/wp-content/uploads/2015/11/toy-story-20th-anniversary.jpg"),
            ("http://i.imgur.com/4IZMjx3.jpg")};

    public ImageAdapter (Context c){
        context= c;    };

    @Override
    public int getCount() {
        return Images.length;
    }

    @Override
    public Object getItem(int position) {
        return Images[position];
    }

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

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ImageView imageview = new ImageView(context);

        imageview.setScaleType(ImageView.ScaleType.CENTER_CROP);
        imageview.setLayoutParams(new GridView.LayoutParams(240,240));

        Picasso.with(context).load(Images[position]).placeholder(R.drawable.loading2).error(R.drawable.nointernet).into(imageview);

        return imageview;
    }
}

这是我的FullImageActivity：

public class FullImageActivity extends AppCompatActivity {

    TouchImageView img;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setTitle("ViewPager");

        setContentView(R.layout.activity_full_image);


        Intent i = getIntent();
        TouchImageView img = new TouchImageView(this);

        int position = i.getExtras().getInt("id");
        ImageAdapter adapter = new ImageAdapter(this);
        List<ImageView> images = new ArrayList<ImageView>();

        img = (TouchImageView) findViewById(R.id.img);
        images.add(img);

        img.setMaxZoom(4f);
        Picasso.with(getApplicationContext()).load(adapter.Images[position]).into(img);

请帮帮我。

Answer 1

您可以通过在单击时将动画代码添加到图像来实现看到这可能是有帮助的： http://www.viralandroid.com/2016/02/slide-down-and-slide-up-animation-in-android.html http://www.vogella.com/tutorials/AndroidAnimation/article.html

用Picasso实现ImageSlider GridView

1 个答案: