package com.example.androiddrawbitmap;
import java.io.FileNotFoundException;
import android.net.Uri;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.TextView;
public class MainActivity extends Activity {
Button btnLoadImage;
TextView textSource;
ImageView imageResult;
SeekBar hueBar, satBar, valBar;
TextView hueText, satText, valText;
Button btnResetHSV;
final int RQS_IMAGE1 = 1;
Uri source;
Bitmap bitmapMaster;
Canvas canvasMaster;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnLoadImage = (Button) findViewById(R.id.loadimage);
textSource = (TextView) findViewById(R.id.sourceuri);
imageResult = (ImageView) findViewById(R.id.result);
btnLoadImage.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
Intent intent = new Intent(
Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(intent, RQS_IMAGE1);
}
});
hueText = (TextView) findViewById(R.id.texthue);
satText = (TextView) findViewById(R.id.textsat);
valText = (TextView) findViewById(R.id.textval);
hueBar = (SeekBar) findViewById(R.id.huebar);
satBar = (SeekBar) findViewById(R.id.satbar);
valBar = (SeekBar) findViewById(R.id.valbar);
hueBar.setOnSeekBarChangeListener(seekBarChangeListener);
satBar.setOnSeekBarChangeListener(seekBarChangeListener);
valBar.setOnSeekBarChangeListener(seekBarChangeListener);
btnResetHSV = (Button)findViewById(R.id.resethsv);
btnResetHSV.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View arg0) {
// reset SeekBars
hueBar.setProgress(256);
satBar.setProgress(256);
valBar.setProgress(256);
loadBitmapHSV();
}});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
switch (requestCode) {
case RQS_IMAGE1:
source = data.getData();
try {
bitmapMaster = BitmapFactory
.decodeStream(getContentResolver().openInputStream(
source));
// reset SeekBars
hueBar.setProgress(256);
satBar.setProgress(256);
valBar.setProgress(256);
loadBitmapHSV();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
break;
}
}
}
OnSeekBarChangeListener seekBarChangeListener = new OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
// TODO Auto-generated method stub
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
loadBitmapHSV();
}
};
private void loadBitmapHSV() {
if (bitmapMaster != null) {
int progressHue = hueBar.getProgress() - 256;
int progressSat = satBar.getProgress() - 256;
int progressVal = valBar.getProgress() - 256;
/*
* Hue (0 .. 360) Saturation (0...1) Value (0...1)
*/
float hue = (float) progressHue * 360 / 256;
float sat = (float) progressSat / 256;
float val = (float) progressVal / 256;
hueText.setText("Hue: " + String.valueOf(hue));
satText.setText("Saturation: " + String.valueOf(sat));
valText.setText("Value: " + String.valueOf(val));
imageResult.setImageBitmap(updateHSV(bitmapMaster, hue, sat, val));
}
}
private Bitmap updateHSV(Bitmap src, float settingHue, float settingSat,
float settingVal) {
int w = src.getWidth();
int h = src.getHeight();
int[] mapSrcColor = new int[w * h];
int[] mapDestColor = new int[w * h];
float[] pixelHSV = new float[3];
src.getPixels(mapSrcColor, 0, w, 0, 0, w, h);
int index = 0;
for (int y = 0; y < h; ++y) {
for (int x = 0; x < w; ++x) {
// Convert from Color to HSV
Color.colorToHSV(mapSrcColor[index], pixelHSV);
// Adjust HSV
pixelHSV[0] = pixelHSV[0] + settingHue;
if (pixelHSV[0] < 0.0f) {
pixelHSV[0] = 0.0f;
} else if (pixelHSV[0] > 360.0f) {
pixelHSV[0] = 360.0f;
}
pixelHSV[1] = pixelHSV[1] + settingSat;
if (pixelHSV[1] < 0.0f) {
pixelHSV[1] = 0.0f;
} else if (pixelHSV[1] > 1.0f) {
pixelHSV[1] = 1.0f;
}
pixelHSV[2] = pixelHSV[2] + settingVal;
if (pixelHSV[2] < 0.0f) {
pixelHSV[2] = 0.0f;
} else if (pixelHSV[2] > 1.0f) {
pixelHSV[2] = 1.0f;
}
// Convert back from HSV to Color
mapDestColor[index] = Color.HSVToColor(pixelHSV);
index++;
}
}
return Bitmap.createBitmap(mapDestColor, w, h, Config.ARGB_8888);
}
}
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:autoLink="web"
android:text="http://android-er.blogspot.com/"
android:textStyle="bold" />
<Button
android:id="@+id/loadimage"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Load Image 1" />
<TextView
android:id="@+id/sourceuri"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<ImageView
android:id="@+id/result"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:background="@android:color/background_dark"
android:scaleType="centerInside" />
<TextView
android:id="@+id/texthue"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Hue" />
<SeekBar
android:id="@+id/huebar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:max="511"
android:progress="256"/>
<TextView
android:id="@+id/textsat"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Saturation" />
<SeekBar
android:id="@+id/satbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:max="511"
android:progress="256"/>
<TextView
android:id="@+id/textval"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Value" />
<SeekBar
android:id="@+id/valbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:max="511"
android:progress="256"/>
<Button
android:id="@+id/resethsv"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Reset HSV" />
</LinearLayout>
Download the files.Download and try APK.more: Something about processing images in Android
