Please notice that it is a heavy memory needed processing, may be you will get OutOfMemoryError!
Modify from the former article "Unsharp Mask (USM) on Android Image Processing".
Create /res/layout/load_dialog.xml to define the layout of the Load JPG dialog.
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/customdialog" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" android:padding="20dp" android:minWidth="300dp"> <LinearLayout android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_margin="10dp"> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/ic_launcher"/> <Button android:id="@+id/up" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="Parent folder"/> </LinearLayout> <TextView android:id="@+id/folder" android:layout_width="wrap_content" android:layout_height="wrap_content"/> <ListView android:id="@+id/dialoglist" android:layout_width="fill_parent" android:layout_height="wrap_content" /> </LinearLayout>
Main code, AndroidImageProcessingActivity.java.
package com.AndroidImageProcessing; import java.io.File; import java.util.ArrayList; import java.util.List; import android.app.Activity; import android.app.Dialog; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Color; import android.net.Uri; import android.os.Bundle; import android.os.Environment; import android.os.Handler; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.View.OnClickListener; import android.webkit.MimeTypeMap; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.ImageView; import android.widget.ListView; import android.widget.ProgressBar; import android.widget.TextView; import android.widget.Toast; import android.widget.AdapterView.OnItemClickListener; public class AndroidImageProcessingActivity extends Activity { //for Load JPG dialog Button buttonUp; static final int LOAD_DIALOG_ID = 0; TextView textFolder; ListView dialog_ListView; private List<String> fileList = new ArrayList<String>(); File root; File curFolder; final static int KERNAL_WIDTH = 3; final static int KERNAL_HEIGHT = 3; int[][] kernal_blur = { {1, 1, 1}, {1, 1, 1}, {1, 1, 1} }; final static int DIV_BY_9 = 9; ImageView imageSource, imageAfter; Bitmap bitmap_Source; ProgressBar progressBar; private Handler handler; Bitmap afterProcess; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); imageSource = (ImageView)findViewById(R.id.imageSource); imageAfter = (ImageView)findViewById(R.id.imageAfter); progressBar = (ProgressBar)findViewById(R.id.progressBar); progressBar.setVisibility(View.GONE); bitmap_Source = BitmapFactory.decodeResource(getResources(), R.drawable.testpicture); handler = new Handler(); //performImageProcessing(bitmap_Source); root = new File(Environment .getExternalStorageDirectory() .getAbsolutePath()); curFolder = root; } private void performImageProcessing(Bitmap bmSrc){ imageSource.setImageBitmap(bmSrc); progressBar.setVisibility(View.VISIBLE); imageAfter.setVisibility(View.GONE); StratBackgroundProcess(bmSrc); } private void StratBackgroundProcess(final Bitmap bm_src){ Runnable runnable = new Runnable(){ @Override public void run() { afterProcess = processingBitmap(bm_src, kernal_blur); handler.post(new Runnable(){ @Override public void run() { progressBar.setVisibility(View.GONE); imageAfter.setVisibility(View.VISIBLE); imageAfter.setImageBitmap(afterProcess); } }); } }; new Thread(runnable).start(); } private Bitmap processingBitmap(Bitmap src, int[][] knl){ Bitmap dest = Bitmap.createBitmap( src.getWidth(), src.getHeight(), src.getConfig()); int bmWidth = src.getWidth(); int bmHeight = src.getHeight(); int bmWidth_MINUS_2 = bmWidth - 2; int bmHeight_MINUS_2 = bmHeight - 2; int bmWidth_OFFSET_1 = 1; int bmHeight_OFFSET_1 = 1; for(int i = bmWidth_OFFSET_1; i <= bmWidth_MINUS_2; i++){ for(int j = bmHeight_OFFSET_1; j <= bmHeight_MINUS_2; j++){ //get the surround 7*7 pixel of current src[i][j] into a matrix subSrc[][] int[][] subSrc = new int[KERNAL_WIDTH][KERNAL_HEIGHT]; for(int k = 0; k < KERNAL_WIDTH; k++){ for(int l = 0; l < KERNAL_HEIGHT; l++){ subSrc[k][l] = src.getPixel(i-bmWidth_OFFSET_1+k, j-bmHeight_OFFSET_1+l); } } //subSum = subSrc[][] * knl[][] long subSumA = 0; long subSumR = 0; long subSumG = 0; long subSumB = 0; for(int k = 0; k < KERNAL_WIDTH; k++){ for(int l = 0; l < KERNAL_HEIGHT; l++){ subSumA += (long)(Color.alpha(subSrc[k][l])) * (long)(knl[k][l]); subSumR += (long)(Color.red(subSrc[k][l])) * (long)(knl[k][l]); subSumG += (long)(Color.green(subSrc[k][l])) * (long)(knl[k][l]); subSumB += (long)(Color.blue(subSrc[k][l])) * (long)(knl[k][l]); } } subSumA = subSumA/DIV_BY_9; subSumR = subSumR/DIV_BY_9; subSumG = subSumG/DIV_BY_9; subSumB = subSumB/DIV_BY_9; int orgColor = src.getPixel(i, j); int orgA = Color.alpha(orgColor); int orgR = Color.red(orgColor); int orgG = Color.green(orgColor); int orgB = Color.blue(orgColor); subSumA = orgA + (orgA - subSumA); subSumR = orgR + (orgR - subSumR); subSumG = orgG + (orgG - subSumG); subSumB = orgB + (orgB - subSumB); if(subSumA <0){ subSumA = 0; }else if(subSumA > 255){ subSumA = 255; } if(subSumR <0){ subSumR = 0; }else if(subSumR > 255){ subSumR = 255; } if(subSumG <0){ subSumG = 0; }else if(subSumG > 255){ subSumG = 255; } if(subSumB <0){ subSumB = 0; }else if(subSumB > 255){ subSumB = 255; } dest.setPixel(i, j, Color.argb( (int)subSumA, (int)subSumR, (int)subSumG, (int)subSumB)); } } return dest; } @Override public boolean onCreateOptionsMenu(Menu menu) { menu.add(0, 0, 0, "Load jpg"); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { switch(item.getItemId()){ case (0): showDialog(LOAD_DIALOG_ID); break; } return true; } @Override protected Dialog onCreateDialog(int id) { Dialog dialog = null; switch(id) { case LOAD_DIALOG_ID: dialog = new Dialog(AndroidImageProcessingActivity.this); dialog.setContentView(R.layout.load_dialog); dialog.setTitle("Load JPG"); dialog.setCancelable(true); dialog.setCanceledOnTouchOutside(true); textFolder = (TextView)dialog.findViewById(R.id.folder); buttonUp = (Button)dialog.findViewById(R.id.up); buttonUp.setOnClickListener(new OnClickListener(){ @Override public void onClick(View v) { // TODO Auto-generated method stub ListDir(curFolder.getParentFile()); }}); //Prepare ListView in dialog dialog_ListView = (ListView)dialog.findViewById(R.id.dialoglist); dialog_ListView.setOnItemClickListener(new OnItemClickListener(){ @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { File selected = new File(fileList.get(position)); if(selected.isDirectory()){ ListDir(selected); }else { Toast.makeText(AndroidImageProcessingActivity.this, selected.toString() + " selected", Toast.LENGTH_LONG).show(); dismissDialog(LOAD_DIALOG_ID); Bitmap bm = BitmapFactory.decodeFile(selected.getAbsolutePath()); imageSource.setImageBitmap(bm); performImageProcessing(bm); } }}); break; } return dialog; } @Override protected void onPrepareDialog(int id, Dialog dialog, Bundle bundle) { // TODO Auto-generated method stub super.onPrepareDialog(id, dialog, bundle); switch(id) { case LOAD_DIALOG_ID: ListDir(curFolder); break; } } void ListDir(File f){ if(f.equals(root)){ buttonUp.setEnabled(false); }else{ buttonUp.setEnabled(true); } curFolder = f; textFolder.setText(f.getPath()); File[] files = f.listFiles(); fileList.clear(); for (File file : files){ if(file.isDirectory()){ fileList.add(file.getPath()); }else{ Uri selectedUri = Uri.fromFile(file); String fileExtension = MimeTypeMap.getFileExtensionFromUrl(selectedUri.toString()); if(fileExtension.equalsIgnoreCase("jpg")){ fileList.add(file.getPath()); } } } ArrayAdapter<String> directoryList = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, fileList); dialog_ListView.setAdapter(directoryList); } }
Main.xml.
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/hello" /> <HorizontalScrollView android:layout_width="wrap_content" android:layout_height="wrap_content"> <ScrollView android:layout_width="wrap_content" android:layout_height="wrap_content"> <LinearLayout android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="Original" /> <ImageView android:id="@+id/imageSource" android:layout_width="wrap_content" android:layout_height="wrap_content" android:scaleType="center"/> <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="Result" /> <FrameLayout android:layout_width="wrap_content" android:layout_height="wrap_content"> <ImageView android:id="@+id/imageAfter" android:layout_width="wrap_content" android:layout_height="wrap_content" android:scaleType="center"/> <ProgressBar android:id="@+id/progressBar" style="?android:attr/progressBarStyleLarge" android:layout_width="wrap_content" android:layout_height="wrap_content"/> </FrameLayout> </LinearLayout> </ScrollView> </HorizontalScrollView> </LinearLayout>
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