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フレーム内のマスキング（クロップ）画像

このような複雑な形状の画像を表示したいリッチUIアプリケーションがある

enter image description here

今私が欲しいのは、マスク画像ごとに画像をトリミングすることです、実際には画像は動的になり、カメラまたはギャラリーからインポートすることができます（正方形または長方形の形状）、私はその画像が欲しいです上記のようにレイアウトフレームに収まるように

だから、私はこれをどのように達成しているのだろうと思っていますか？任意のアイデア/ヒントを歓迎

背景フレーム
enter image description here
マスク
enter image description here

this

androidimagebitmapmaskingporter-duff
81
Azhar Shaikh

マスク画像を変更し、XfermodeとBitmapを使用して、最終的に解決策を得ました

マスク

enter image description here

 ImageView mImageView= (ImageView)findViewById(R.id.imageview_id);
 Bitmap original = BitmapFactory.decodeResource(getResources(),R.drawable.content_image);
 Bitmap mask = BitmapFactory.decodeResource(getResources(),R.drawable.mask);
 Bitmap result = Bitmap.createBitmap(mask.getWidth(), mask.getHeight(), Config.ARGB_8888);
 Canvas mCanvas = new Canvas(result);
 Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
 Paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_IN));
 mCanvas.drawBitmap(original, 0, 0, null);
 mCanvas.drawBitmap(mask, 0, 0, Paint);
 Paint.setXfermode(null);
 mImageView.setImageBitmap(result);
 mImageView.setScaleType(ScaleType.CENTER);
 mImageView.setBackgroundResource(R.drawable.background_frame);

出力を見る

enter image description here

ソースを見つけることができますここ

141
Azhar Shaikh

Picassoライブラリとカスタム変換を使用するとさらに簡単になります。

MaskTransformation.Java：

 * ORIGINAL:
 * Copyright (C) 2015 Wasabeef
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.Apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package me.monori.example.utilities;

import Android.content.Context;
import Android.graphics.Bitmap;
import Android.graphics.Canvas;
import Android.graphics.Paint;
import Android.graphics.PorterDuff;
import Android.graphics.PorterDuffXfermode;
import Android.graphics.drawable.Drawable;
import Android.support.v4.content.ContextCompat;

import com.squareup.picasso.Transformation;

public class MaskTransformation implements Transformation {

    private static Paint mMaskingPaint = new Paint();
    private Context mContext;
    private int mMaskId;

    static {
        mMaskingPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
    }

    /**
     * @param maskId If you change the mask file, please also rename the mask file, or Glide will get
     * the cache with the old mask. Because getId() return the same values if using the
     * same make file name. If you have a good idea please tell us, thanks.
     */
    public MaskTransformation(Context context, int maskId) {
        mContext = context.getApplicationContext();
        mMaskId = maskId;
    }

    @Override public Bitmap transform(Bitmap source) {
        int width = source.getWidth();
        int height = source.getHeight();

        Bitmap result = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);

        Drawable mask = getMaskDrawable(mContext, mMaskId);

        Canvas canvas = new Canvas(result);
        mask.setBounds(0, 0, width, height);
        mask.draw(canvas);
        canvas.drawBitmap(source, 0, 0, mMaskingPaint);

        source.recycle();

        return result;
    }

    @Override public String key() {
        return "MaskTransformation(maskId=" + mContext.getResources().getResourceEntryName(mMaskId)
                + ")";
    }

    public Drawable getMaskDrawable(Context context, int maskId) {
        Drawable drawable = ContextCompat.getDrawable(context, maskId);

        if (drawable == null) {
            throw new IllegalArgumentException("maskId is invalid");
        }

        return drawable;
    }
}

次に、単に行で定義します。

Picasso.with(context)
                    .load(imageUrl)
                    .transform(new MaskTransformation(context, _maskDrawableId))
                    .placeholder(R.drawable.drawableId)
                    .into(imageView);
5
captainserious
     final ImageView mImageView = (ImageView) findViewById(R.id.image);
     mImageView.setBackgroundResource(R.drawable.user_outer_circle_icon);


     mImageView.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {


            if(b){
                 mImageView.setBackgroundResource(R.drawable.profil_circle);

                 Bitmap original = BitmapFactory.decodeResource(getResources(),R.drawable.doge);

                 Bitmap mask = BitmapFactory.decodeResource(getResources(),R.drawable.mask_white);

                 Bitmap mask1 = BitmapFactory.decodeResource(getResources(),R.drawable.pencil_bg);

                 original = Bitmap.createScaledBitmap(original, mask.getWidth(),mask.getHeight(), true);

                 Bitmap result = Bitmap.createBitmap(mask.getWidth(), mask.getHeight(),Config.ARGB_8888);
                 Canvas mCanvas = new Canvas(result);
                 Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
                 Paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_IN));
                 mCanvas.drawBitmap(original, 0, 0, null);
                 mCanvas.drawBitmap(mask, 0, 0, Paint);
                 mCanvas.drawBitmap(mask1, 0, 0, null);
                 Bitmap mask2 = BitmapFactory.decodeResource(getResources(), R.drawable.ic_pencil);
                 mCanvas.drawBitmap(mask2, 0, 0, null);
                 mImageView.setImageBitmap(result);
                 mImageView.setScaleType(ScaleType.FIT_XY);

                 b=false;
             }else{
                 ImageView mImageView = (ImageView) findViewById(R.id.image);
                 Bitmap original = BitmapFactory.decodeResource(getResources(),
                 R.drawable.doge);

                 Bitmap mask = BitmapFactory.decodeResource(getResources(),
                 R.drawable.mask_white);

                 original = Bitmap.createScaledBitmap(original, mask.getWidth(),
                 mask.getHeight(), true);

                 Bitmap result = Bitmap.createBitmap(mask.getWidth(), mask.getHeight(),
                 Config.ARGB_8888);
                 Canvas mCanvas = new Canvas(result);
                 Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
                 Paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_IN));
                 mCanvas.drawBitmap(original, 0, 0, null);
                 mCanvas.drawBitmap(mask, 0, 0, Paint);
                 Paint.setXfermode(null);
                 mImageView.setImageBitmap(result);
                 mImageView.setScaleType(ScaleType.FIT_XY);
                // mImageView.setBackgroundResource(R.drawable.user_outer_circle_icon);
                 b= true;


             }


        }
    });
1
Prashant