initial commit with full sources

AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="id.flwi.example.image.encdec64"
+    android:versionCode="1"
+    android:versionName="1.0" >
+
+    <uses-sdk android:minSdkVersion="8" />
+
+    <application
+        android:icon="@drawable/ic_launcher"
+        android:label="@string/app_name" >
+        <activity
+            android:label="@string/app_name"
+            android:name=".EncDecImageActivity" >
+            <intent-filter >
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

README

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+to test on SharedPreferences, after you encode64 image, force close the application and open it back.

gen/id/flwi/example/image/encdec64/R.java

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+/* AUTO-GENERATED FILE.  DO NOT MODIFY.
+ *
+ * This class was automatically generated by the
+ * aapt tool from the resource data it found.  It
+ * should not be modified by hand.
+ */
+
+package id.flwi.example.image.encdec64;
+
+public final class R {
+    public static final class attr {
+    }
+    public static final class drawable {
+        public static final int ic_launcher=0x7f020000;
+    }
+    public static final class id {
+        public static final int buttonConvertToImage=0x7f050002;
+        public static final int buttonLoadImage=0x7f050000;
+        public static final int imageViewConvert=0x7f050003;
+        public static final int textViewResult=0x7f050001;
+    }
+    public static final class layout {
+        public static final int main=0x7f030000;
+    }
+    public static final class string {
+        public static final int app_name=0x7f040001;
+        public static final int hello=0x7f040000;
+    }
+}

proguard.cfg

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+-optimizationpasses 5
+-dontusemixedcaseclassnames
+-dontskipnonpubliclibraryclasses
+-dontpreverify
+-verbose
+-optimizations !code/simplification/arithmetic,!field/*,!class/merging/*
+
+-keep public class * extends android.app.Activity
+-keep public class * extends android.app.Application
+-keep public class * extends android.app.Service
+-keep public class * extends android.content.BroadcastReceiver
+-keep public class * extends android.content.ContentProvider
+-keep public class * extends android.app.backup.BackupAgentHelper
+-keep public class * extends android.preference.Preference
+-keep public class com.android.vending.licensing.ILicensingService
+
+-keepclasseswithmembernames class * {
+    native <methods>;
+}
+
+-keepclasseswithmembers class * {
+    public <init>(android.content.Context, android.util.AttributeSet);
+}
+
+-keepclasseswithmembers class * {
+    public <init>(android.content.Context, android.util.AttributeSet, int);
+}
+
+-keepclassmembers class * extends android.app.Activity {
+   public void *(android.view.View);
+}
+
+-keepclassmembers enum * {
+    public static **[] values();
+    public static ** valueOf(java.lang.String);
+}
+
+-keep class * implements android.os.Parcelable {
+  public static final android.os.Parcelable$Creator *;
+}

project.properties

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+# This file is automatically generated by Android Tools.
+# Do not modify this file -- YOUR CHANGES WILL BE ERASED!
+#
+# This file must be checked in Version Control Systems.
+#
+# To customize properties used by the Ant build system use,
+# "ant.properties", and override values to adapt the script to your
+# project structure.
+
+# Project target.
+target=android-8

res/layout/main.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="fill_parent"
+    android:layout_height="fill_parent"
+    android:orientation="vertical" >
+
+    <LinearLayout
+        xmlns:android="http://schemas.android.com/apk/res/android"
+        android:layout_width="fill_parent"
+        android:layout_height="fill_parent"
+        android:orientation="vertical" >
+
+        <Button
+            android:id="@+id/buttonLoadImage"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="Load Image" />
+
+        <TextView
+            android:id="@+id/textViewResult"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="TextView" />
+
+        <Button
+            android:id="@+id/buttonConvertToImage"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="Convert to Image" />
+
+        <ImageView
+            android:id="@+id/imageViewConvert"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:src="@drawable/ic_launcher" />
+    </LinearLayout>
+
+</ScrollView>

res/values/strings.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <string name="hello">Hello World, EncDecImageActivity!</string>
+    <string name="app_name">Encode-decode64-image</string>
+
+</resources>

src/id/flwi/example/image/encdec64/EncDecImageActivity.java

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+package id.flwi.example.image.encdec64;
+
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+import android.app.Activity;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.content.SharedPreferences.Editor;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.net.Uri;
+import android.os.Bundle;
+import android.preference.PreferenceManager;
+import android.util.Base64;
+import android.util.Log;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.Button;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+public class EncDecImageActivity extends Activity {
+	Button buttonLoad = null;
+	Button buttonConvert = null;
+	TextView textEncode = null;
+	ImageView imageConvertResult = null;
+
+	static final int INTENT_REQUEST_CODE_BROWSE_PICTURE = 1;
+
+	/** Called when the activity is first created. */
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.main);
+
+        buttonLoad = (Button)findViewById(R.id.buttonLoadImage);
+        buttonConvert = (Button)findViewById(R.id.buttonConvertToImage);
+        textEncode = (TextView)findViewById(R.id.textViewResult);
+        imageConvertResult = (ImageView)findViewById(R.id.imageViewConvert);
+
+		SharedPreferences shre = PreferenceManager.getDefaultSharedPreferences(this);
+		String previouslyEncodedImage = shre.getString("image_data", "");
+
+		if( !previouslyEncodedImage.equalsIgnoreCase("") ){
+			byte[] b = Base64.decode(previouslyEncodedImage, Base64.DEFAULT);
+			Bitmap bitmap = BitmapFactory.decodeByteArray(b, 0, b.length);
+			imageConvertResult.setImageBitmap(bitmap);
+		}
+
+
+        buttonLoad.setOnClickListener( new OnClickListener() {
+
+			@Override
+			public void onClick(View view) {
+				Intent intent = new Intent();
+				intent.setType("image/*");
+				intent.setAction(Intent.ACTION_GET_CONTENT);
+				intent.addCategory(Intent.CATEGORY_OPENABLE);
+				startActivityForResult(intent,
+						INTENT_REQUEST_CODE_BROWSE_PICTURE);
+
+			}
+		});
+
+        buttonConvert.setOnClickListener( new OnClickListener() {
+
+			@Override
+			public void onClick(View v) {
+
+				byte[] b = Base64.decode(textEncode.getText().toString(), Base64.DEFAULT);
+				Bitmap bitmap = BitmapFactory.decodeByteArray(b, 0, b.length);
+				imageConvertResult.setImageBitmap(bitmap);
+			}
+		});
+    }
+	protected void onActivityResult(int requestCode, int resultCode,
+			Intent intent) {
+		switch (requestCode) {
+		case INTENT_REQUEST_CODE_BROWSE_PICTURE:
+			if( resultCode == Activity.RESULT_OK ){
+
+				InputStream stream;
+				String filePath = null;
+				try {
+					stream = getContentResolver().openInputStream(intent.getData());
+
+					Bitmap realImage = BitmapFactory.decodeStream(stream);
+					ByteArrayOutputStream baos = new ByteArrayOutputStream();
+					realImage.compress(Bitmap.CompressFormat.JPEG, 100, baos);   
+					byte[] b = baos.toByteArray(); 
+
+					String encodedImage = Base64.encodeToString(b, Base64.DEFAULT);
+					textEncode.setText(encodedImage);
+
+					SharedPreferences shre = PreferenceManager.getDefaultSharedPreferences(this);
+				    Editor edit=shre.edit();
+				    edit.putString("image_data",encodedImage);
+				    edit.commit();
+
+				} catch (FileNotFoundException e) {
+					// TODO Auto-generated catch block
+					e.printStackTrace();
+				} catch (IOException e) {
+					// TODO Auto-generated catch block
+					e.printStackTrace();
+				}
+			}
+			break;
+		}
+	}
+}