I'm using Spinner for selecting list of Filter effects Like Sapia,GrayScale...etc
Image Filter code is working for Individual Effects for Drawable images.
I want to apply these effets for selected Images those are piking from Gallery.
MainFrameActivity.java
filtSp=(Spinner)findViewById(R.id.spnrFilter);
photoImage1 = (ImageView) findViewById(R.id.ImageV);
photoImage2 = (ImageView) findViewById(R.id.ImageV1);
filtSp.setAdapter(new MyFAdapter(MainFrameActivity.this, R.layout.frowview, Filtef));
filtSp.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View v,
int position, long arg3) {
selectFitem=parent.getItemAtPosition(position).toString();
if(photoImage1!=null) {
if(selectFitem.equals("Sapia" ) {
bitmap1=BitmapFactory.decodeResource(getResources(), R.id.photoImage);
bitmap_tmp=EffectsActivity.applySapia(MainActivity.this.bitmap1, 50, 2.2, 0, 2.2);
photoImage1.setImageBitmap(bitmap_tmp);
}
else if(selectFitem.equals("Greyscale" ) {
bitmap1=BitmapFactory.decodeResource(getResources(), R.id.photoImage);
bitmap_tmp=EffectsActivity.applyGscale(MainActivity.this.bitmap1);
photoImage1.setImageBitmap(bitmap_tmp);
}
}
else if(photoImage2!=null) {
if(selectFitem.equals("Sapia" ) {
bitmap2=BitmapFactory.decodeResource(getResources(), R.id.photoImage2);
bitmap_tmp=EffectsActivity.applySapia(MainActivity.this.bitmap2, 50, 2.2, 0, 2.2);
photoImage2.setImageBitmap(bitmap_tmp);
}
else if(selectFitem.equals("Greyscale" ) {
bitmap2=BitmapFactory.decodeResource(getResources(), R.id.photoImage2);
bitmap_tmp=EffectsActivity.applyGscale(MainActivity.this.bitmap2);
photoImage2.setImageBitmap(bitmap_tmp);
}
}
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
});
public class MyFAdapter extends ArrayAdapter<String>{
public MyFAdapter(Context context, int resource, String[] objects) {
super(context, resource, objects);
// TODO Auto-generated constructor stub
}
@Override
public View getDropDownView(int position, View convertView,ViewGroup parent) {
return getCustomView(position, convertView, parent);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
return getCustomView(position, convertView, parent);
}
public View getCustomView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater=getLayoutInflater();
View row=inflater.inflate(R.layout.frowview, parent, false);
TextView label=(TextView)row.findViewById(R.id.company);
label.setText(Filtef[position]);
ImageView icon=(ImageView)row.findViewById(R.id.image);
icon.setImageResource(arry_Eff[position]);
return row;
}
}
this is everything inside of OnCreate()
Problem is Effects are not applying to Images While using Spinner Image Filter Effects are Used from http://xjaphx.wordpress.com/2011/06/21/image-processing-photography-sepia-toning-effect/
Error Log:
12-11 11:00:58.207: E/AndroidRuntime(15784): FATAL EXCEPTION: main
12-11 11:00:58.207: E/AndroidRuntime(15784): java.lang.NullPointerException
12-11 11:00:58.207: E/AndroidRuntime(15784): at com.Myframes.MyEffects.applySepiaEffect(MyEffects.java:128)
12-11 11:00:58.207: E/AndroidRuntime(15784): at com.Myframes.MainFrameActivity$1.onItemSelected(MainFrameActivity.java:301)
12-11 11:00:58.207: E/AndroidRuntime(15784): at android.widget.AdapterView.fireOnSelected(AdapterView.java:892)
12-11 11:00:58.207: E/AndroidRuntime(15784): at android.widget.AdapterView.access$200(AdapterView.java:49)
12-11 11:00:58.207: E/AndroidRuntime(15784): at android.widget.AdapterView$SelectionNotifier.run(AdapterView.java:860)
12-11 11:00:58.207: E/AndroidRuntime(15784): at android.os.Handler.handleCallback(Handler.java:615)
12-11 11:00:58.207: E/AndroidRuntime(15784): at android.os.Handler.dispatchMessage(Handler.java:92)
12-11 11:00:58.207: E/AndroidRuntime(15784): at android.os.Looper.loop(Looper.java:137)
12-11 11:00:58.207: E/AndroidRuntime(15784): at android.app.ActivityThread.main(ActivityThread.java:4895)
12-11 11:00:58.207: E/AndroidRuntime(15784): at java.lang.reflect.Method.invokeNative(Native Method)
12-11 11:00:58.207: E/AndroidRuntime(15784): at java.lang.reflect.Method.invoke(Method.java:511)
12-11 11:00:58.207: E/AndroidRuntime(15784): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:994)
12-11 11:00:58.207: E/AndroidRuntime(15784): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:761)
12-11 11:00:58.207: E/AndroidRuntime(15784): at dalvik.system.NativeStart.main(Native Method)
MyEffects.java
public class MyEffects {
public static Bitmap applyGscale(Bitmap src) {
// constant factors
final double GS_RED = 0.299;
final double GS_GREEN = 0.587;
final double GS_BLUE = 0.114;
// create output bitmap
Bitmap bmOut = Bitmap.createBitmap(src.getWidth(), src.getHeight(), src.getConfig());
// pixel information
int A, R, G, B;
int pixel;
// get image size
int width = src.getWidth();
int height = src.getHeight();
// scan through every single pixel
for(int x = 0; x < width; ++x) {
for(int y = 0; y < height; ++y) {
// get one pixel color
pixel = src.getPixel(x, y);
// retrieve color of all channels
A = Color.alpha(pixel);
R = Color.red(pixel);
G = Color.green(pixel);
B = Color.blue(pixel);
// take conversion up to one single value
R = G = B = (int)(GS_RED * R + GS_GREEN * G + GS_BLUE * B);
// set new pixel color to output bitmap
bmOut.setPixel(x, y, Color.argb(A, R, G, B));
}
}
// return final image
return bmOut;
}
public static Bitmap applySapia(Bitmap src, int depth, double red, double green, double blue) {
// image size
int width = src.getWidth();
int height = src.getHeight();
// create output bitmap
Bitmap bmOut = Bitmap.createBitmap(width, height, src.getConfig());
// constant grayscale
final double GS_RED = 0.3;
final double GS_GREEN = 0.59;
final double GS_BLUE = 0.11;
// color information
int A, R, G, B;
int pixel;
// scan through all pixels
for(int x = 0; x < width; ++x) {
for(int y = 0; y < height; ++y) {
// get pixel color
pixel = src.getPixel(x, y);
// get color on each channel
A = Color.alpha(pixel);
R = Color.red(pixel);
G = Color.green(pixel);
B = Color.blue(pixel);
// apply grayscale sample
B = G = R = (int)(GS_RED * R + GS_GREEN * G + GS_BLUE * B);
// apply intensity level for sepid-toning on each channel
R += (depth * red);
if(R > 255) { R = 255; }
G += (depth * green);
if(G > 255) { G = 255; }
B += (depth * blue);
if(B > 255) { B = 255; }
// set new pixel color to output image
bmOut.setPixel(x, y, Color.argb(A, R, G, B));
}
}
// return final image
return bmOut;
}
photoImage2 is not initialized giving you NullPointerException.
photoImage1 is initialized twice.
photoImage1 = (ImageView) findViewById(R.id.ImageV);
photoImage1 = (ImageView) findViewById(R.id.ImageV1);
So you probably want to change this
photoImage1 = (ImageView) findViewById(R.id.ImageV1);
to
photoImage2 = (ImageView) findViewById(R.id.ImageV1);