Java 如何在代码中使用毕加索设置背景图像
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How do I set background image with picasso in code
提问by Toye
I know picasso loads image into imageview etc but how do I set my layout background image using picasso?
我知道 picasso 将图像加载到 imageview 等中，但是如何使用 picasso 设置布局背景图像？
My code:
我的代码：
public class MainActivity extends ActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
RelativeLayout relativeLayout = (RelativeLayout) findViewById(R.id.relativelayout);
relativeLayout.setBackgroundResource(R.drawable.table_background);
Picasso.with(MainActivity.this)
.load(R.drawable.table_background)
.resize(200, 200)
.into(relativeLayout);
return relativeLayout;
}
What I have here gives any error saying it cannot be resolved. I have a ScrollView and relative layouts.
我在这里给出的任何错误都表明它无法解决。我有一个 ScrollView 和相对布局。
采纳答案by Soham
Use callback of Picasso
使用毕加索的回调
Picasso.with(getActivity()).load(R.drawable.table_background).into(new Target(){
@Override
public void onBitmapLoaded(Bitmap bitmap, LoadedFrom from) {
mainLayout.setBackground(new BitmapDrawable(context.getResources(), bitmap));
}
@Override
public void onBitmapFailed(final Drawable errorDrawable) {
Log.d("TAG", "FAILED");
}
@Override
public void onPrepareLoad(final Drawable placeHolderDrawable) {
Log.d("TAG", "Prepare Load");
}
})
UPDATE:
更新：
Please check thisalso .As @OlivierH mentioned in the comment.
也请检查这一点。正如评论中提到的@OlivierH。
回答by NickUnuchek
The best way it's create custom Transformation for example for fill color:
最好的方法是创建自定义转换，例如填充颜色：
public class BackgroundColorTransform implements Transformation {
@ColorInt int mFillColor;
public BackgroundColorTransform(@ColorInt int color) {
super();
mFillColor = color;
}
@Override
public Bitmap transform(Bitmap bitmap) {
// Create another bitmap that will hold the results of the filter.
int width = bitmap.getWidth();
int height = bitmap.getHeight();
Bitmap out = Bitmap.createBitmap(width, height, bitmap.getConfig());
Canvas canvas = new Canvas(out);
Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
canvas.drawColor(mFillColor);
canvas.drawBitmap(bitmap, 0f, 0f, paint);
bitmap.recycle();
return out;
}
@Override
public String key() {
return "BackgroundColorTransform:"+mFillColor;
}
}
Usage:
用法：
mPicasso.load(imageUrl)
.transform(new BackgroundColorTransform(ContextCompat.getColor(getContext(),R.color.black)))
.into(mLogoImageView);
If you want to add a vectorDrawable image use the Transformation :
如果要添加 vectorDrawable 图像，请使用 Transformation ：
public class AddVectorDrawableTransform implements Transformation {
private Drawable mDrawable;
@ColorInt int mTintColor;
public AddVectorDrawableTransform(Drawable drawable, @ColorInt int tintColor) {
super();
mDrawable = drawable;
mTintColor = tintColor;
}
@Override
public Bitmap transform(Bitmap bitmap) {
// Create another bitmap that will hold the results of the filter.
int width = bitmap.getWidth();
int height = bitmap.getHeight();
Bitmap out = Bitmap.createBitmap(width, height, bitmap.getConfig());
Canvas canvas = new Canvas(out);
Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
canvas.drawBitmap(bitmap, 0f, 0f, paint);
Drawable drawable = mDrawable.mutate();
drawable = DrawableCompat.wrap(drawable);
DrawableCompat.setTint(drawable, mTintColor);
DrawableCompat.setTintMode(drawable, PorterDuff.Mode.SRC_IN);
// mDrawable.setColorFilter( mTintColor, PorterDuff.Mode.MULTIPLY);
drawable.setBounds(width/4, height/4, 3*width/4, 3*height/4);
drawable.draw(canvas);
bitmap.recycle();
return out;
}
@Override
public String key() {
return "AddDrawableTransform:"+mDrawable+", "+mTintColor;
}
}
