我想为特定图像创建位图图像，但我想抵制位图图像的宽度和高度。 使用以下代码.
image2=bitmap factory.decode resource (get resources )，rid )；
log.w(debug )、' which is null : imagei ' I.getwidth )、' OR ' i.getDrawable )、 getIntrinsicHeight )；
log.w(debug )、' which is null : imageh ' h.getwidth )、' OR ' h.getHeight )；
log.w(debug )、) whichisnull:image2) image2.getwidth )、(or ) image2.getheight )；
bitmap image=bitmap.createscaledbitmap (image2，i.getWidth )，i.getHeight )，false )；
log.w(debug )、' which is null : image ' image.getwidth )、' OR ' image.getHeight )；
双精度BM width=image.getwidth (；
double bmHeight=image.getHeight (；
if (x0|| y0|) )。
返回0； //Invalid，return 0
}else{
//Convert touched x，y on View to on Bitmap
intxbm=(int ) ) x * (BM width/getwidth ) ) )；
intybm=(int ) ) y * (BM height/getheight ) ) ) )；
returnimage.getpixel(xbm，yBm )；
但它不会给我同样的输出……它展示了我同样的宽度和高度，但我想要的输出却来不了。 在我希望的输出的高度会变大……所以，如何克服它呢？ 我不能一个人提议
this.setdrawingcacheenabled (true；
//this is the important code : )
//withoutittheviewwillhaveadimensionof 0，0 andthebitmapwillbenull
this.measure (measurespec.makemeasurespec (0，MeasureSpec.UNSPECIFIED )，MeasureSpec.makeMeasureSpec(0) ) ) 0
this.layout(0，this.getMeasuredWidth )，this.getMeasuredHeight )；
this.builddrawingcache(true；
bitmap image=bitmap.create bitmap (this.getdrawingcache ()；
this.setdrawingcacheenabled (false；
//image2=bitmap factory.decode resource (get resource )、' which is null 3360 image2' image2.getwidth )、' or'imageer
log.w (调试)、yBm )；
}
}
现在表示我的空指针异常…
堆栈跟踪
05-2915336022336007.2053: e/Android运行时(889 ) : FATAL EXCEPTION: main
05-2915336022336007.205:07 e/Android runtime (889 ) : java.lang .痴情巨人/P05-2915:2336007.20533: e/andrrr
05-2915336022336007.205:0 e/Android runtime (889 ) : atcom.example.Nam.image in.getmaskpixel (image in.javame )
05-2915336022336007.205:0 e/Android runtime (889 ) : atcom.example.Nam.ash activity.getmaskcolor ) ashactivivity
05-2915336022336007.205:0 e/Android runtime (889 ) : atcom.example.Nam.first image.page info (first image.jimage )
05-2915336022336007.205:0 e/Android runtime (889 ) : atcom.example.Nam.first image.on touch ) first image.ja
05-2915336022336007.205:0 e/Android runtime (889 ) : at Android.view.view.dispatchtouchevent (view.Java 3366666 )
05-2915336022336007.205:0 e/Android runtime (889 ) : at Android.view.viewgroup.dispatchtouchevent ) view group
05-2915336022336007.205:0 e/Android runtime (889 ) : at Android.view.viewgroup.dispatchtouchevent ) view group
05-2915336022336007.205:0 e/Android runtime (889 ) : at Android.view.viewgroup.dispatchtouchevent ) view group
05-2915336022336007.205:0 e/Android runtime (889 ) : at Android.view.viewgroup.dispatchtouchevent ) view group
05-2915336022336007.205:0 e/Android runtime (889 ) : at Android.view.viewgroup.dispatchtouchevent ) view group
05-2915336022336007.205:0 e/Android runtime (889 ) : at Android.view.viewgroup.dispatchtouchevent ) view group
05-2915336022336007.205:0 e/Android runtime (889 ) : at Android.view.viewgroup.dispatchtouchevent ) view group
05-2915336022336007.205:0 e/Android runtime (889 ) : atcom.Android.internal.policy.impl.phone window $ decod
05-2915336022336007.205:0 e/Android runtime (889 ) : atcom.Android.internal.policy.impl.phone window.suproine
05-2915336022336007.205:0 e/Android runtime (889 ) : at Android.app.activity.dispatchtouchevent (activity.jj )
05-2915336022336007.205:0 e/Android runtime (889 ) : atcom.Android.internal.policy.impl.phone window $ decod
05-2915336022336007.205:0 e/Android runtime (889 ) : at Android.view.view root.handle message ) viewroot.Java360
05-2915336022336007.205:0 e/Android runtime (889 ) : at Android.OS.handler.dispatch message (handler.Java 333336 )
05-2915336022336007.205: e/Android运行时(889 ) : at Android.OS.looper.loop (looper.Java 3360123 ) ) )
05-2915336022336007.205:0 e/Android runtime (889 ) : at Android.app.activity thread.main (activity thread.javave )
05-2915336022336007.205:0 e/Android runtime (889 ) : at Java.lang.reflect.method.invoke native ) nativemethod
05-2915336022336007.205:0 e/Android runtime (889 ) : at Java.lang.reflect.method.invoke ) method.Java336000
05-2915336022336007.205:0 e/Android runtime (889 ) : atcom.Android.internal.OS.zygote init $ methodandargscard
05-2915336022336007.205:0 e/Android runtime (889 ) : atcom.Android.internal.OS.zygote init.main ) zygoteinnin
05-2915336022336007.205:0 e/Android runtime (889 ) : atdalvik.system.native start.main (native method ) ) ) )