Android图片处理工具类
package
com.zhy.weather.util;
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;
/**
* Android图像处理类
*
* @author scott
*
*/
public class ImageUtil {
// 放大缩小图片
public static Bitmap zoomBitmap(Bitmap bitmap, int w, int h) {
int width = bitmap.getWidth();
int height = bitmap.getHeight();
Matrix matrix = new Matrix();
float scaleWidht = (( float ) w / width);
float scaleHeight = (( float ) h / height);
matrix.postScale(scaleWidht, scaleHeight);
Bitmap newbmp = Bitmap.createBitmap(bitmap, 0 , 0 , width, height,
matrix, true );
return newbmp;
}
// 将Drawable转化为Bitmap
public static Bitmap drawableToBitmap(Drawable drawable) {
int width = drawable.getIntrinsicWidth();
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;
}
// 获得圆角图片的方法
public static Bitmap getRoundedCornerBitmap(Bitmap bitmap, float roundPx) {
Bitmap output = Bitmap.createBitmap(bitmap.getWidth(),
bitmap.getHeight(), Config.ARGB_8888);
Canvas canvas = new Canvas(output);
final int color = 0xff424242 ;
final Paint paint = new Paint();
final Rect rect = new Rect( 0 , 0 , bitmap.getWidth(), bitmap.getHeight());
final RectF rectF = new RectF(rect);
paint.setAntiAlias( true );
canvas.drawARGB( 0 , 0 , 0 , 0 );
paint.setColor(color);
canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
paint.setXfermode( new PorterDuffXfermode(Mode.SRC_IN));
canvas.drawBitmap(bitmap, rect, rect, paint);
return output;
}
// 获得带倒影的图片方法
public static Bitmap createReflectionImageWithOrigin(Bitmap bitmap) {
final int reflectionGap = 4 ;
int width = bitmap.getWidth();
int height = bitmap.getHeight();
Matrix matrix = new Matrix();
matrix.preScale( 1 , - 1 );
Bitmap reflectionImage = Bitmap.createBitmap(bitmap, 0 , height / 2 ,
width, height / 2 , matrix, false );
Bitmap bitmapWithReflection = Bitmap.createBitmap(width,
(height + height / 2 ), Config.ARGB_8888);
Canvas canvas = new Canvas(bitmapWithReflection);
canvas.drawBitmap(bitmap, 0 , 0 , null );
Paint deafalutPaint = new Paint();
canvas.drawRect( 0 , height, width, height + reflectionGap, deafalutPaint);
canvas.drawBitmap(reflectionImage, 0 , height + reflectionGap, null );
Paint paint = new Paint();
LinearGradient shader = new LinearGradient( 0 , bitmap.getHeight(), 0 ,
bitmapWithReflection.getHeight() + reflectionGap, 0x70ffffff ,
0x00ffffff , TileMode.CLAMP);
paint.setShader(shader);
// Set the Transfer mode to be porter duff and destination in
paint.setXfermode( new PorterDuffXfermode(Mode.DST_IN));
// Draw a rectangle using the paint with our linear gradient
canvas.drawRect( 0 , height, width, bitmapWithReflection.getHeight()
+ reflectionGap, paint);
return bitmapWithReflection;
}
}
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;
/**
* Android图像处理类
*
* @author scott
*
*/
public class ImageUtil {
// 放大缩小图片
public static Bitmap zoomBitmap(Bitmap bitmap, int w, int h) {
int width = bitmap.getWidth();
int height = bitmap.getHeight();
Matrix matrix = new Matrix();
float scaleWidht = (( float ) w / width);
float scaleHeight = (( float ) h / height);
matrix.postScale(scaleWidht, scaleHeight);
Bitmap newbmp = Bitmap.createBitmap(bitmap, 0 , 0 , width, height,
matrix, true );
return newbmp;
}
// 将Drawable转化为Bitmap
public static Bitmap drawableToBitmap(Drawable drawable) {
int width = drawable.getIntrinsicWidth();
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;
}
// 获得圆角图片的方法
public static Bitmap getRoundedCornerBitmap(Bitmap bitmap, float roundPx) {
Bitmap output = Bitmap.createBitmap(bitmap.getWidth(),
bitmap.getHeight(), Config.ARGB_8888);
Canvas canvas = new Canvas(output);
final int color = 0xff424242 ;
final Paint paint = new Paint();
final Rect rect = new Rect( 0 , 0 , bitmap.getWidth(), bitmap.getHeight());
final RectF rectF = new RectF(rect);
paint.setAntiAlias( true );
canvas.drawARGB( 0 , 0 , 0 , 0 );
paint.setColor(color);
canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
paint.setXfermode( new PorterDuffXfermode(Mode.SRC_IN));
canvas.drawBitmap(bitmap, rect, rect, paint);
return output;
}
// 获得带倒影的图片方法
public static Bitmap createReflectionImageWithOrigin(Bitmap bitmap) {
final int reflectionGap = 4 ;
int width = bitmap.getWidth();
int height = bitmap.getHeight();
Matrix matrix = new Matrix();
matrix.preScale( 1 , - 1 );
Bitmap reflectionImage = Bitmap.createBitmap(bitmap, 0 , height / 2 ,
width, height / 2 , matrix, false );
Bitmap bitmapWithReflection = Bitmap.createBitmap(width,
(height + height / 2 ), Config.ARGB_8888);
Canvas canvas = new Canvas(bitmapWithReflection);
canvas.drawBitmap(bitmap, 0 , 0 , null );
Paint deafalutPaint = new Paint();
canvas.drawRect( 0 , height, width, height + reflectionGap, deafalutPaint);
canvas.drawBitmap(reflectionImage, 0 , height + reflectionGap, null );
Paint paint = new Paint();
LinearGradient shader = new LinearGradient( 0 , bitmap.getHeight(), 0 ,
bitmapWithReflection.getHeight() + reflectionGap, 0x70ffffff ,
0x00ffffff , TileMode.CLAMP);
paint.setShader(shader);
// Set the Transfer mode to be porter duff and destination in
paint.setXfermode( new PorterDuffXfermode(Mode.DST_IN));
// Draw a rectangle using the paint with our linear gradient
canvas.drawRect( 0 , height, width, bitmapWithReflection.getHeight()
+ reflectionGap, paint);
return bitmapWithReflection;
}
}
//将bitmap转化为drawable
//Drawable drawable=new BitmapDrawable(bitmap);
//imgdrawable.setImageDrawable(drawable);