图片加载Picasso
https://github.com/square/picasso
基本用法
// 基本用法
// 普通加载图片
Picasso.with(PicassoActivity.this)
.load("http://n.sinaimg.cn/translate/20160819/9BpA-fxvcsrn8627957.jpg")
.into(ivPicassoResult1);
// 裁剪的方式加载图片
Picasso.with(PicassoActivity.this)
.load("http://n.sinaimg.cn/translate/20160819/9BpA-fxvcsrn8627957.jpg")
.resize(100,100)
.into(ivPicassoResult2);
// 选择180度
Picasso.with(PicassoActivity.this)
.load("http://n.sinaimg.cn/translate/20160819/9BpA-fxvcsrn8627957.jpg")
.rotate(180)
.into(ivPicassoResult3);
ListView中使用
public class PicassoListviewAdapter extends BaseAdapter {
private Context mContext;
public PicassoListviewAdapter(Context context) {
mContext = context;
}
@Override
public int getCount() {
return Constants.IMAGES.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) {
ViewHolder holder;
if(convertView == null) {
convertView = View.inflate(mContext, R.layout.item_picasso_listview,null);
holder = new ViewHolder(convertView);
convertView.setTag(holder);
}else {
holder = (ViewHolder) convertView.getTag();
}
// 名称
holder.name.setText("item"+(position+1));
// 加载图片
Picasso.with(mContext)
.load(Constants.IMAGES[position])
.placeholder(R.drawable.atguigu_logo)
.error(R.drawable.atguigu_logo)
.into(holder.iv);
return convertView;
}
class ViewHolder{
@Bind(R.id.iv_picasso_item)
ImageView iv;
@Bind(R.id.tv_picasso_name)
TextView name;
public ViewHolder(View view) {
ButterKnife.bind(this,view);
}
}
}
图片transform
compile 'com.squareup.picasso:picasso:2.5.2'
compile 'jp.wasabeef:picasso-transformations:2.1.0'
// If you want to use the GPU Filters
compile 'jp.co.cyberagent.android.gpuimage:gpuimage-library:1.4.1'
dip单位转像素px
public class Utils {
public static int dip2px(Context context, float dp) {
float scale = context.getResources().getDisplayMetrics().density;
return (int) (dp * scale + 0.5f);
}
}
public class PicassoTransformationsAdapter extends BaseAdapter {
private Context mContext;
private List<String> mData;
public PicassoTransformationsAdapter(Context context, List<String> data) {
mContext = context;
mData = data;
}
@Override
public int getCount() {
return mData == null ? 0 : mData.size();
}
@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) {
ViewHolder holder;
if(convertView == null) {
convertView = View.inflate(mContext, R.layout.item_picasso_transformations,null);
holder = new ViewHolder(convertView);
convertView.setTag(holder);
}else {
holder = (ViewHolder) convertView.getTag();
}
// 显示名称
holder.name.setText("item"+(position + 1));
int integer = Integer.parseInt(mData.get(position));
switch (integer) {
case 1: {
int width = Utils.dip2px(mContext, 133.33f);
int height = Utils.dip2px(mContext, 126.33f);
Picasso.with(mContext)
.load(R.drawable.check)
.resize(width, height)
.centerCrop()
.transform((new MaskTransformation(mContext, R.drawable.mask_starfish)))
.into(holder.image);
break;
}
case 2: {
int width = Utils.dip2px(mContext, 150.0f);
int height = Utils.dip2px(mContext, 100.0f);
Picasso.with(mContext)
.load(R.drawable.check)
.resize(width, height)
.centerCrop()
.transform(new MaskTransformation(mContext, R.drawable.chat_me_mask))
.into(holder.image);
break;
}
case 3:
Picasso.with(mContext)
.load(R.drawable.demo)
.transform(new CropTransformation(300, 100, CropTransformation.GravityHorizontal.LEFT,
CropTransformation.GravityVertical.TOP))
.into(holder.image);
break;
case 4:
Picasso.with(mContext).load(R.drawable.demo)
// 300, 100, CropTransformation.GravityHorizontal.LEFT, CropTransformation.GravityVertical.CENTER))
.transform(new CropTransformation(300, 100)).into(holder.image);
break;
case 5:
Picasso.with(mContext)
.load(R.drawable.demo)
.transform(new CropTransformation(300, 100, CropTransformation.GravityHorizontal.LEFT,
CropTransformation.GravityVertical.BOTTOM))
.into(holder.image);
break;
case 6:
Picasso.with(mContext)
.load(R.drawable.demo)
.transform(new CropTransformation(300, 100, CropTransformation.GravityHorizontal.CENTER,
CropTransformation.GravityVertical.TOP))
.into(holder.image);
break;
case 7:
Picasso.with(mContext)
.load(R.drawable.demo)
.transform(new CropTransformation(300, 100))
.into(holder.image);
break;
case 8:
Picasso.with(mContext)
.load(R.drawable.demo)
.transform(new CropTransformation(300, 100, CropTransformation.GravityHorizontal.CENTER,
CropTransformation.GravityVertical.BOTTOM))
.into(holder.image);
break;
case 9:
Picasso.with(mContext)
.load(R.drawable.demo)
.transform(new CropTransformation(300, 100, CropTransformation.GravityHorizontal.RIGHT,
CropTransformation.GravityVertical.TOP))
.into(holder.image);
break;
case 10:
Picasso.with(mContext)
.load(R.drawable.demo)
.transform(new CropTransformation(300, 100, CropTransformation.GravityHorizontal.RIGHT,
CropTransformation.GravityVertical.CENTER))
.into(holder.image);
break;
case 11:
Picasso.with(mContext)
.load(R.drawable.demo)
.transform(new CropTransformation(300, 100, CropTransformation.GravityHorizontal.RIGHT,
CropTransformation.GravityVertical.BOTTOM))
.into(holder.image);
break;
case 12:
Picasso.with(mContext)
.load(R.drawable.demo)
.transform(new CropTransformation((float) 16 / (float) 9,
CropTransformation.GravityHorizontal.CENTER,
CropTransformation.GravityVertical.CENTER))
.into(holder.image);
break;
case 13:
Picasso.with(mContext)
.load(R.drawable.demo)
.transform(new CropTransformation((float) 4 / (float) 3,
CropTransformation.GravityHorizontal.CENTER,
CropTransformation.GravityVertical.CENTER))
.into(holder.image);
break;
case 14:
Picasso.with(mContext)
.load(R.drawable.demo)
.transform(new CropTransformation(3, CropTransformation.GravityHorizontal.CENTER,
CropTransformation.GravityVertical.CENTER))
.into(holder.image);
break;
case 15:
Picasso.with(mContext)
.load(R.drawable.demo)
.transform(new CropTransformation(3, CropTransformation.GravityHorizontal.CENTER,
CropTransformation.GravityVertical.TOP))
.into(holder.image);
break;
case 16:
Picasso.with(mContext)
.load(R.drawable.demo)
.transform(new CropTransformation(1, CropTransformation.GravityHorizontal.CENTER,
CropTransformation.GravityVertical.CENTER))
.into(holder.image);
break;
case 17:
Picasso.with(mContext)
.load(R.drawable.demo)
.transform(new CropTransformation((float) 0.5, (float) 0.5,
CropTransformation.GravityHorizontal.CENTER,
CropTransformation.GravityVertical.CENTER))
.into(holder.image);
break;
case 18:
Picasso.with(mContext)
.load(R.drawable.demo)
.transform(new CropTransformation((float) 0.5, (float) 0.5,
CropTransformation.GravityHorizontal.CENTER,
CropTransformation.GravityVertical.TOP))
.into(holder.image);
break;
case 19:
Picasso.with(mContext)
.load(R.drawable.demo)
.transform(new CropTransformation((float) 0.5, (float) 0.5,
CropTransformation.GravityHorizontal.RIGHT,
CropTransformation.GravityVertical.BOTTOM))
.into(holder.image);
break;
case 20:
Picasso.with(mContext)
.load(R.drawable.demo)
.transform(new CropTransformation((float) 0.5, 0, (float) 4 / (float) 3,
CropTransformation.GravityHorizontal.CENTER,
CropTransformation.GravityVertical.CENTER))
.into(holder.image);
break;
case 21:
Picasso.with(mContext)
.load(R.drawable.demo)
.transform(new CropSquareTransformation())
.into(holder.image);
break;
case 22:
Picasso.with(mContext)
.load(R.drawable.demo)
.transform(new CropCircleTransformation())
.into(holder.image);
break;
case 23:
Picasso.with(mContext)
.load(R.drawable.demo)
.transform(new ColorFilterTransformation(Color.argb(80, 255, 0, 0)))
.into(holder.image);
break;
case 24:
Picasso.with(mContext)
.load(R.drawable.demo)
.transform(new GrayscaleTransformation())
.into(holder.image);
break;
case 25:
Picasso.with(mContext)
.load(R.drawable.demo)
.transform(new RoundedCornersTransformation(30, 0,
RoundedCornersTransformation.CornerType.BOTTOM_LEFT))
.into(holder.image);
break;
case 26:
Picasso.with(mContext)
.load(R.drawable.check)
.transform(new BlurTransformation(mContext, 25, 1))
.into(holder.image);
break;
case 27:
Picasso.with(mContext)
.load(R.drawable.demo)
.transform(new ToonFilterTransformation(mContext))
.into(holder.image);
break;
case 28:
Picasso.with(mContext)
.load(R.drawable.check)
.transform(new SepiaFilterTransformation(mContext))
.into(holder.image);
break;
case 29:
Picasso.with(mContext)
.load(R.drawable.check)
.transform(new ContrastFilterTransformation(mContext, 2.0f))
.into(holder.image);
break;
case 30:
Picasso.with(mContext)
.load(R.drawable.check)
.transform(new InvertFilterTransformation(mContext))
.into(holder.image);
break;
case 31:
Picasso.with(mContext)
.load(R.drawable.check)
.transform(new PixelationFilterTransformation(mContext, 20))
.into(holder.image);
break;
case 32:
Picasso.with(mContext)
.load(R.drawable.check)
.transform(new SketchFilterTransformation(mContext))
.into(holder.image);
break;
case 33:
Picasso.with(mContext)
.load(R.drawable.check)
.transform(new SwirlFilterTransformation(mContext, 0.5f, 1.0f, new PointF(0.5f, 0.5f)))
.into(holder.image);
break;
case 34:
Picasso.with(mContext)
.load(R.drawable.check)
.transform(new BrightnessFilterTransformation(mContext, 0.5f))
.into(holder.image);
break;
case 35:
Picasso.with(mContext)
.load(R.drawable.check)
.transform(new KuwaharaFilterTransformation(mContext, 25))
.into(holder.image);
break;
case 36:
Picasso.with(mContext)
.load(R.drawable.check)
.transform(new VignetteFilterTransformation(mContext, new PointF(0.5f, 0.5f),
new float[]{0.0f, 0.0f, 0.0f}, 0f, 0.75f))
.into(holder.image);
break;
}
return convertView;
}
class ViewHolder{
@Bind(R.id.iv_picasso)
ImageView image;
@Bind(R.id.tv_picasso)
TextView name;
public ViewHolder(View view) {
ButterKnife.bind(this, view);
}
}
}
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