package com.test.androidimageprocessing;
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.Paint;
import android.graphics.PorterDuff;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
import com.example.androidimageprocessing.R;
public class MainActivity extends Activity {
Button btnLoadImage1, btnLoadImage2;
TextView textSource1, textSource2;
Button btnProcessing;
ImageView imageResult;
Spinner spinnerMode;
final int RQS_IMAGE1 = 1;
final int RQS_IMAGE2 = 2;
Uri source1, source2;
String[] arrayModeName = {
"ADD",
"CLEAR",
"DARKEN",
"DST",
"DST_ATOP",
"DST_IN",
"DST_OUT",
"DST_OVER",
"LIGHTEN",
"MULTIPLY",
"OVERLAY",
"SCREEN",
"SRC",
"SRC_ATOP",
"SRC_IN",
"SRC_OUT",
"SRC_OVER",
"XOR" };
/*
* To use Mode.ADD and Mode.OVERLAY, android:minSdkVersion
* have to be set "11" or higher.
*/
PorterDuff.Mode[] arrayMode = {
Mode.ADD,
Mode.CLEAR,
Mode.DARKEN,
Mode.DST,
Mode.DST_ATOP,
Mode.DST_IN,
Mode.DST_OUT,
Mode.DST_OVER,
Mode.LIGHTEN,
Mode.MULTIPLY,
Mode.OVERLAY,
Mode.SCREEN,
Mode.SRC,
Mode.SRC_ATOP,
Mode.SRC_IN,
Mode.SRC_OUT,
Mode.SRC_OVER,
Mode.XOR };
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnLoadImage1 = (Button)findViewById(R.id.loadimage1);
btnLoadImage2 = (Button)findViewById(R.id.loadimage2);
textSource1 = (TextView)findViewById(R.id.sourceuri1);
textSource2 = (TextView)findViewById(R.id.sourceuri2);
btnProcessing = (Button)findViewById(R.id.processing);
imageResult = (ImageView)findViewById(R.id.result);
spinnerMode = (Spinner)findViewById(R.id.mode);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(MainActivity.this,
android.R.layout.simple_spinner_item, arrayModeName);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinnerMode.setAdapter(adapter);
btnLoadImage1.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);
}});
btnLoadImage2.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_IMAGE2);
}});
btnProcessing.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
if(source1 != null && source2 != null){
Bitmap processedBitmap = ProcessingBitmap();
if(processedBitmap != null){
imageResult.setImageBitmap(processedBitmap);
Toast.makeText(getApplicationContext(),
"Done",
Toast.LENGTH_LONG).show();
}else{
Toast.makeText(getApplicationContext(),
"Something wrong in processing!",
Toast.LENGTH_LONG).show();
}
}else{
Toast.makeText(getApplicationContext(),
"Select both image!",
Toast.LENGTH_LONG).show();
}
}});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(resultCode == RESULT_OK){
switch (requestCode){
case RQS_IMAGE1:
source1 = data.getData();
textSource1.setText(source1.toString());
break;
case RQS_IMAGE2:
source2 = data.getData();
textSource2.setText(source2.toString());
break;
}
}
}
private Bitmap ProcessingBitmap(){
Bitmap bm1 = null;
Bitmap bm2 = null;
Bitmap newBitmap = null;
try {
bm1 = BitmapFactory.decodeStream(
getContentResolver().openInputStream(source1));
bm2 = BitmapFactory.decodeStream(
getContentResolver().openInputStream(source2));
int w;
if(bm1.getWidth() >= bm2.getWidth()){
w = bm1.getWidth();
}else{
w = bm2.getWidth();
}
int h;
if(bm1.getHeight() >= bm2.getHeight()){
h = bm1.getHeight();
}else{
h = bm2.getHeight();
}
Config config = bm1.getConfig();
if(config == null){
config = Bitmap.Config.ARGB_8888;
}
newBitmap = Bitmap.createBitmap(w, h, config);
Canvas newCanvas = new Canvas(newBitmap);
newCanvas.drawBitmap(bm1, 0, 0, null);
Paint paint = new Paint();
int selectedPos = spinnerMode.getSelectedItemPosition();
PorterDuff.Mode selectedMode = arrayMode[selectedPos];
paint.setXfermode(new PorterDuffXfermode(selectedMode));
newCanvas.drawBitmap(bm2, 0, 0, paint);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return newBitmap;
}
}
<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:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:orientation="vertical"
tools:context=".MainActivity" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="http://android-er.blogspot.com/"
android:textStyle="bold"
android:layout_gravity="center_horizontal"
android:autoLink="web" />
<Button
android:id="@+id/loadimage1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Load Image 1" />
<TextView
android:id="@+id/sourceuri1"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<Button
android:id="@+id/loadimage2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Load Image 2" />
<TextView
android:id="@+id/sourceuri2"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<Spinner
android:id="@+id/mode"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<Button
android:id="@+id/processing"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Processing" />
<ImageView
android:id="@+id/result"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
Download the files.You can download and try the APK here. (The exercises have not take care the bitmap size, and any resizing. So don't test with big picture, otherwise OutOfMemoryError or "Bitmap too large to be uploaded into a texture" will happen).
more: Something about processing images in Android
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