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:

<?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>  

效果图：

drawable2bitmap

zoom

round corner

reflected bitmap

来源：http://blog.csdn.net/linghu_java/article/details/6733247