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Thursday, 22 August 2013

Example to create shadow frame for image

04:51
create shadow frame for image


package com.example.androidframeimage;

import java.io.FileNotFoundException;

import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.PorterDuffXfermode;
import android.graphics.Bitmap.Config;
import android.graphics.PorterDuff.Mode;
import android.graphics.Rect;
import android.graphics.RectF;

public class MainActivity extends Activity {

Button btnLoadImage1;
TextView textSource1;
Button btnProcessing;
ImageView imageResult;

final int RQS_IMAGE1 = 1;

Uri source1;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnLoadImage1 = (Button)findViewById(R.id.loadimage1);
textSource1 = (TextView)findViewById(R.id.sourceuri1);
btnProcessing = (Button)findViewById(R.id.processing);
imageResult = (ImageView)findViewById(R.id.result);

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);
}});

btnProcessing.setOnClickListener(new OnClickListener(){

@Override
public void onClick(View v) {

if(source1 != 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 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;
}
}
}

private Bitmap ProcessingBitmap(){
Bitmap bm1 = null;
Bitmap newBitmap = null;
Bitmap newShadowBitmap = null;

try {
bm1 = BitmapFactory.decodeStream(
getContentResolver().openInputStream(source1));

int w = bm1.getWidth();
int h = bm1.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.drawColor(Color.BLACK);

Paint paint = new Paint();
paint.setColor(Color.WHITE);
Rect frame = new Rect(
(int)(w*0.05),
(int)(w*0.05),
(int)(w*0.95),
(int)(h*0.95));
RectF frameF = new RectF(frame);
newCanvas.drawRect(frameF, paint);
paint.setXfermode(new PorterDuffXfermode(Mode.DARKEN));
newCanvas.drawBitmap(bm1, 0, 0, paint);

/*
* Create shadow like outer frame
*/

//create BLACK bitmap with same size of the image
Bitmap bitmapFullGray = Bitmap.createBitmap(w, h, config);
Canvas canvasFullGray = new Canvas(bitmapFullGray);
canvasFullGray.drawColor(0xFF808080);

//create bigger bitmap with shadow frame
int shadowThick = 100;
int shadowRadius = 50;
newShadowBitmap = Bitmap.createBitmap(w+shadowThick+shadowRadius,
h+shadowThick+shadowRadius, config);
Canvas newShadowCanvas = new Canvas(newShadowBitmap);
newShadowCanvas.drawColor(Color.WHITE);

//generate shadow
Paint paintShadow = new Paint();
paintShadow.setShadowLayer(shadowRadius, shadowThick, shadowThick, 0xFF000000);
newShadowCanvas.drawBitmap(bitmapFullGray, 0, 0, paintShadow);

//Place the image
paintShadow.clearShadowLayer();
newShadowCanvas.drawBitmap(newBitmap, 0, 0, paintShadow);

} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

return newShadowBitmap;
}

}

Layout refer to last exercise "Create frame on Bitmap image".

download filesDownload the files.



more: Something about processing images in Android

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