Android 图片处理特效

Android --- 图片处理的方法

转换 -  drawable To  bitmap

缩放 -  Zoom

圆角 -  Round Corner

倒影 -  Reflected

bitmapPrcess  code:

package com.learn.games;  

      
    import android.graphics.Bitmap;  
    import android.graphics.Canvas;  
    import android.graphics.LinearGradient;  
    import android.graphics.Matrix;  
    import android.graphics.Paint;  
    import android.graphics.PixelFormat;  
    import android.graphics.PorterDuffXfermode;  
    import android.graphics.Rect;  
    import android.graphics.RectF;  
    import android.graphics.Bitmap.Config;  
    import android.graphics.PorterDuff.Mode;  
    import android.graphics.Shader.TileMode;  
    import android.graphics.drawable.Drawable;  
      
    public class bitmapProcess {  
      
        // zoom   
        public static Bitmap zoomBitmap(Bitmap bitmap, int w, int h){  
            int width = bitmap.getWidth();  
            int height = bitmap.getHeight();  
            Matrix matrix = new Matrix();  
              
            float scaleWidth = w/(float)width;  
            float scaleHeight = h/(float)height;  
            matrix.postScale(scaleWidth, scaleHeight);  
              
            Bitmap bitmap2 = Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, true);  
            return bitmap2;       
        }  
          
          
        // drawable to bitmap   
        public static Bitmap drawable2Bitmap(Drawable drawable){  
            int width = drawable.getIntrinsicHeight();  
            int height = drawable.getIntrinsicHeight();  
              
            Bitmap bitmap = Bitmap.createBitmap(width, height, drawable.getOpacity()   
                    != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565);  
              
            Canvas canvas = new Canvas(bitmap);  
            drawable.setBounds(0, 0, width, height);  
            drawable.draw(canvas);  
              
            return bitmap;  
        }  
          
          
        // Round Corner Bitmap   
        public static Bitmap getRoundCornerBitmap(Bitmap bitmap, float roundPX){  
            int width = bitmap.getWidth();  
            int height = bitmap.getHeight();  
              
            Bitmap bitmap2 = Bitmap.createBitmap(width, height, Config.ARGB_8888);  
            Canvas canvas = new Canvas(bitmap2);  
              
            final int color = 0xff424242;  
            final Paint paint = new Paint();  
            final Rect rect = new Rect(0, 0, width, height);  
            final RectF rectF = new RectF(rect);  
      
            paint.setColor(color);  
            paint.setAntiAlias(true);  
            canvas.drawARGB(0, 0, 0, 0);  
            canvas.drawRoundRect(rectF, roundPX, roundPX, paint);  
              
            paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));  
            canvas.drawBitmap(bitmap, rect, rect, paint);  
              
            return bitmap2;  
        }  
          
        // Reflect Bitmap   
        public static Bitmap createReflectedBitmap(Bitmap bitmap){  
            final int reflectedGap = 4;  
            int width = bitmap.getWidth();  
            int height = bitmap.getHeight();  
              
            Matrix matrix = new Matrix();  
            matrix.preScale(1, -1);  
              
            Bitmap reflectedImage = Bitmap.createBitmap(bitmap, 0, height/2, width, height/2, matrix, false);  
            Bitmap reflectedBitmap = Bitmap.createBitmap(width, (height + height/2), Config.ARGB_8888);  
              
            Canvas canvas = new Canvas(reflectedBitmap);  
            canvas.drawBitmap(bitmap, 0, 0, null);  
            Paint defaultPaint = new Paint();  
            canvas.drawRect(0, height, width, height + reflectedGap, defaultPaint);  
            canvas.drawBitmap(reflectedImage, 0, height + reflectedGap, null);  
              
            Paint paint = new Paint();  
            LinearGradient shader = new LinearGradient(0, bitmap.getHeight(), 0,  
                                    reflectedBitmap.getHeight() + reflectedGap, 0x70ffffff, 0x00ffffff, TileMode.CLAMP);  
            paint.setShader(shader);  
            paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN));  
            canvas.drawRect(0, height, width, reflectedBitmap.getHeight() + reflectedGap, paint);  
              
            return reflectedBitmap;  
        }  
          
    }  

Java Code:

package com.learn.games;  

      
    import android.app.Activity;  
    import android.graphics.Bitmap;  
    import android.graphics.drawable.BitmapDrawable;  
    import android.graphics.drawable.Drawable;  
    import android.os.Bundle;  
    import android.widget.ImageView;  
      
    public class MyBitmapProcessActivity extends Activity {  
        private ImageView imgView1;  
        private ImageView imgView2;  
        private ImageView imgView3;  
        private ImageView imgView4;  
          
        /** Called when the activity is first created. */  
        @Override  
        public void onCreate(Bundle savedInstanceState) {  
            super.onCreate(savedInstanceState);  
            setContentView(R.layout.main);  
              
            drawBitmap();  
        }  
          
          
        private void drawBitmap(){  
            imgView1 = (ImageView)findViewById(R.id.imgView1);  
            imgView2 = (ImageView)findViewById(R.id.imgView2);  
            imgView3 = (ImageView)findViewById(R.id.imgView3);  
            imgView4 = (ImageView)findViewById(R.id.imgView4);  
              
            Drawable drawable = this.getWallpaper();  
              
            Bitmap bitmap = bitmapProcess.drawable2Bitmap(drawable);                        // drawable to bitmap   
            Bitmap zoomBitmap = bitmapProcess.zoomBitmap(bitmap, 100, 100);                 // zoom    
            Bitmap roundBitmap = bitmapProcess.getRoundCornerBitmap(zoomBitmap, 10.0f);     // round corner    
            Bitmap reflectedBitmap = bitmapProcess.createReflectedBitmap(zoomBitmap);       // reflect bitmap   
              
            // drawable to bitmap   
            imgView1.setImageBitmap(bitmap);  
            imgView2.setImageBitmap(zoomBitmap);  
            imgView3.setImageBitmap(roundBitmap);  
            imgView4.setImageBitmap(reflectedBitmap);  
              
            // bitmap to drawable   
            Drawable roundDrawable = new BitmapDrawable(roundBitmap);  
            Drawable reflectedDrawable = new BitmapDrawable(reflectedBitmap);  
            imgView1.setBackgroundDrawable(roundDrawable);  
            imgView2.setBackgroundDrawable(reflectedDrawable);  
        }  
    }  

<?xml version="1.0" encoding="utf-8"?>  

    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
        android:orientation="vertical"  
        android:layout_width="fill_parent"  
        android:layout_height="fill_parent"  
        >  
       
         <ImageView android:id="@+id/imgView1"  
            android:layout_width="wrap_content"   
            android:layout_height="wrap_content"/>  
              
              
        <ImageView android:id="@+id/imgView2"  
            android:layout_width="wrap_content"   
            android:layout_height="wrap_content"/>  
          
        <ImageView android:id="@+id/imgView3"  
            android:layout_width="wrap_content"   
            android:layout_height="wrap_content"/>  
              
              
        <ImageView android:id="@+id/imgView4"  
            android:layout_width="wrap_content"   
            android:layout_height="wrap_content"/>  
              
    </LinearLayout>  

drawable2bitmap

zoom

round corner

reflected bitmap