2014/10/16 上午 08:20:18

android Programming Glossary: newbitmap

When should I recycle a bitmap using LRUCache?

http://stackoverflow.com/questions/10743381/when-should-i-recycle-a-bitmap-using-lrucache

boolean evicted String key Bitmap oldBitmap Bitmap newBitmap oldBitmap.recycle oldBitmap null This fixes the crashes..

http://stackoverflow.com/questions/14398670/rotating-a-bitmap-using-jni-ndk

valueOfBitmapConfigFunction configName jobject newBitmap env CallStaticObjectMethod bitmapCls createBitmapFunction info.height.. into the new bitmap if ret AndroidBitmap_lockPixels env newBitmap bitmapPixels 0 LOGE AndroidBitmap_lockPixels failed error d.. failed error d ret return NULL uint32_t newBitmapPixels uint32_t bitmapPixels int whereToPut 0 for int x info.width..

How to cache bitmaps into native memory

http://stackoverflow.com/questions/17900732/how-to-cache-bitmaps-into-native-memory

valueOfBitmapConfigFunction configName jobject newBitmap env CallStaticObjectMethod bitmapCls createBitmapFunction jniBitmap.. ret void bitmapPixels if ret AndroidBitmap_lockPixels env newBitmap bitmapPixels 0 LOGE AndroidBitmap_lockPixels failed error d.. failed error d ret return NULL uint32_t newBitmapPixels uint32_t bitmapPixels int pixelsCount jniBitmap _bitmapInfo.height..

JNI bitmap operations , for helping to avoid OOM when using large images [closed]

http://stackoverflow.com/questions/18250951/jni-bitmap-operations-for-helping-to-avoid-oom-when-using-large-images

uint32_t newWidth right left newHeight bottom top uint32_t newBitmapPixels new uint32_t newWidth newHeight uint32_t whereToGet previousData.. previousData left top oldWidth uint32_t whereToPut newBitmapPixels for int y top y bottom y memcpy whereToPut whereToGet.. new one delete previousData jniBitmap _storedBitmapPixels newBitmapPixels jniBitmap _bitmapInfo.width newWidth jniBitmap _bitmapInfo.height..

Scaling ImageView to device width

http://stackoverflow.com/questions/4877694/scaling-imageview-to-device-width

bitmap Create a new bitmap with the scaling factor Bitmap newBitmap Util.ScaleBitmap bitmap scalingFactor Set the bitmap as the.. as the ImageView source this.imageView.setImageBitmap newBitmap private float getBitmapScalingFactor Bitmap bm Get display width..

How to resize image (Bitmap) to for examle 800x480 in code?

http://stackoverflow.com/questions/8471226/how-to-resize-image-bitmap-to-for-examle-800x480-in-code

height Math.round float ratio realImage.getHeight Bitmap newBitmap Bitmap.createScaledBitmap realImage width height filter return..

When should I recycle a bitmap using LRUCache?

http://stackoverflow.com/questions/10743381/when-should-i-recycle-a-bitmap-using-lrucache

return bitmap.getByteCount @Override protected void entryRemoved boolean evicted String key Bitmap oldBitmap Bitmap newBitmap oldBitmap.recycle oldBitmap null This fixes the crashes however it also results in images sometimes not appearing in..

Rotating a bitmap using JNI & NDK

http://stackoverflow.com/questions/14398670/rotating-a-bitmap-using-jni-ndk

jobject bitmapConfig env CallStaticObjectMethod bitmapConfigClass valueOfBitmapConfigFunction configName jobject newBitmap env CallStaticObjectMethod bitmapCls createBitmapFunction info.height info.width bitmapConfig putting the pixels into the.. info.height info.width bitmapConfig putting the pixels into the new bitmap if ret AndroidBitmap_lockPixels env newBitmap bitmapPixels 0 LOGE AndroidBitmap_lockPixels failed error d ret return NULL uint32_t newBitmapPixels uint32_t bitmapPixels.. env newBitmap bitmapPixels 0 LOGE AndroidBitmap_lockPixels failed error d ret return NULL uint32_t newBitmapPixels uint32_t bitmapPixels int whereToPut 0 for int x info.width 1 x 0 x for int y 0 y info.height y uint32_t pixel tempPixels..

How to cache bitmaps into native memory

http://stackoverflow.com/questions/17900732/how-to-cache-bitmaps-into-native-memory

jobject bitmapConfig env CallStaticObjectMethod bitmapConfigClass valueOfBitmapConfigFunction configName jobject newBitmap env CallStaticObjectMethod bitmapCls createBitmapFunction jniBitmap _bitmapInfo.height jniBitmap _bitmapInfo.width bitmapConfig.. bitmapConfig putting the pixels into the new bitmap int ret void bitmapPixels if ret AndroidBitmap_lockPixels env newBitmap bitmapPixels 0 LOGE AndroidBitmap_lockPixels failed error d ret return NULL uint32_t newBitmapPixels uint32_t bitmapPixels.. env newBitmap bitmapPixels 0 LOGE AndroidBitmap_lockPixels failed error d ret return NULL uint32_t newBitmapPixels uint32_t bitmapPixels int pixelsCount jniBitmap _bitmapInfo.height jniBitmap _bitmapInfo.width memcpy newBitmapPixels..

JNI bitmap operations , for helping to avoid OOM when using large images [closed]

http://stackoverflow.com/questions/18250951/jni-bitmap-operations-for-helping-to-avoid-oom-when-using-large-images

uint32_t oldWidth jniBitmap _bitmapInfo.width uint32_t newWidth right left newHeight bottom top uint32_t newBitmapPixels new uint32_t newWidth newHeight uint32_t whereToGet previousData left top oldWidth uint32_t whereToPut newBitmapPixels.. newBitmapPixels new uint32_t newWidth newHeight uint32_t whereToGet previousData left top oldWidth uint32_t whereToPut newBitmapPixels for int y top y bottom y memcpy whereToPut whereToGet sizeof uint32_t newWidth whereToGet oldWidth whereToPut newWidth.. whereToPut newWidth done copying so replace old data with new one delete previousData jniBitmap _storedBitmapPixels newBitmapPixels jniBitmap _bitmapInfo.width newWidth jniBitmap _bitmapInfo.height newHeight rotates the inner bitmap data by 90 degress..

Scaling ImageView to device width

http://stackoverflow.com/questions/4877694/scaling-imageview-to-device-width

ImageView float scalingFactor this.getBitmapScalingFactor bitmap Create a new bitmap with the scaling factor Bitmap newBitmap Util.ScaleBitmap bitmap scalingFactor Set the bitmap as the ImageView source this.imageView.setImageBitmap newBitmap private.. newBitmap Util.ScaleBitmap bitmap scalingFactor Set the bitmap as the ImageView source this.imageView.setImageBitmap newBitmap private float getBitmapScalingFactor Bitmap bm Get display width from device int displayWidth getWindowManager .getDefaultDisplay..

How to resize image (Bitmap) to for examle 800x480 in code?

http://stackoverflow.com/questions/8471226/how-to-resize-image-bitmap-to-for-examle-800x480-in-code