BlurBackground

A fast and simple blurring background for Android. This is based on ImageBlurring.

NDK build in Android Studio

1.Add NDK path to project local.properties

ndk.dir=~/Library/Android/android-ndk-r10

2.Declare native code to java file

public static native void blurIntArray(int[] pImg, int w, int h, int r);
public static native void blurBitMap(Bitmap bitmap, int r);

static {
    System.loadLibrary("ImageBlur");
}

3.Open terminal and 'cd' to ../src/main, then input the command below:

javah -d jni -classpath ~/Library/Android/sdk/platforms/android-22/android.jar:~/AndroidStudioProjects/MyApplication/app/build/intermediates/classes/debug com.example.android.ImageBlur

A new file 'com_example_android_ImageBlur.h' will be there.

4.Add C/C++ files to ../src/main/jni

5.Add some NDK configrations to build.gradle under the module,like:

defaultConfig {
    applicationId "com.example.android"
    minSdkVersion 15
    targetSdkVersion 22
    versionCode 1
    versionName "1.0"

    ndk{
        moduleName "ImageBlur"
        cFlags "-DANDROID_NDK -D_RELEASE"
        ldLibs "m", "log", "jnigraphics"
        abiFilters "armeabi", "armeabi-v7a"
    }
}

Finally, just run the project.

Screenshots