add big preview, open photo with ImageViewer

Author: katcom

app/build.gradle

@@ -27,4 +27,6 @@ dependencies {
     androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
     implementation 'com.android.support:support-v4:28.0.0'
     implementation 'com.android.support:design:28.0.0'
+    implementation 'net.zetetic:android-database-sqlcipher:4.4.2@aar'
+    implementation "androidx.sqlite:sqlite:2.0.1"
 }

app/src/main/AndroidManifest.xml

@@ -11,6 +11,7 @@
         android:theme="@style/AppTheme">
         <activity android:name=".LoginActivity"></activity>
         <activity android:name=".VaultActivity" android:exported="false"/>
+        <activity android:name=".ImageViewerActivity" android:exported="false"/>
         <activity android:name=".EntryActivity">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />

app/src/main/java/com/katcom/androidFileVault/FileVault.java

@@ -74,30 +74,7 @@ public Bitmap getPreview(ProtectedFile file,int sizeX,int sizeY){
     }
 
     private Bitmap getPicturePreview(ProtectedFile file,int sizeX,int sizeY) {
-        BitmapFactory.Options options = new BitmapFactory.Options();
-        options.inJustDecodeBounds = true;
-        BitmapFactory.decodeFile(file.getFilepath(),options);
-
-        float srcWidth = options.outWidth;
-        float srcHeight = options.outHeight;
-
-        float targetWidth = Utils.dip2px(mContext,sizeX);
-        float targetHeight = Utils.dip2px(mContext,sizeY);
-
-        // Scale the picture
-        int inSampleSize = 1;
-        if(srcHeight > targetHeight || srcHeight > targetHeight){
-            if(srcWidth > targetWidth){
-                inSampleSize = Math.round(srcWidth/targetWidth);
-            }else{
-                inSampleSize = Math.round(srcHeight/targetHeight);
-            }
-        }
-
-        options = new BitmapFactory.Options();
-        options.inSampleSize = inSampleSize;
-
-        return BitmapFactory.decodeFile(file.getFilepath(),options);
+        return Utils.getScaledBitmap(mContext,file.getFilepath(),sizeX,sizeY);
     }
 
     public void importFile(String filepath){

app/src/main/java/com/katcom/androidFileVault/ImageViewerActivity.java

@@ -0,0 +1,25 @@
+package com.katcom.androidFileVault;
+
+import android.content.Context;
+import android.content.Intent;
+import android.support.v4.app.Fragment;
+
+public class ImageViewerActivity extends SingleFragmentActivity {
+    public static final String EXTRA_FILE_NAME= "com.katcom.adnroidFileVault.imageviewerIntent.filename";
+    public static final String EXTRA_FILE_PATH = "com.katcom.adnroidFileVault.imageviewerIntent.filepath";
+
+    @Override
+    protected Fragment createFragment() {
+        String filename = (String)getIntent().getSerializableExtra(EXTRA_FILE_NAME);
+        String filepath = (String)getIntent().getSerializableExtra(EXTRA_FILE_PATH);
+
+        return ImageViewerFragment.newInstance(filename,filepath);
+    }
+
+    public static Intent newIntent(Context packageContext, String filename,String filepath){
+        Intent intent = new Intent(packageContext, ImageViewerActivity.class);
+        intent.putExtra(EXTRA_FILE_NAME,filename);
+        intent.putExtra(EXTRA_FILE_PATH,filepath);
+        return intent;
+    }
+}

app/src/main/java/com/katcom/androidFileVault/ImageViewerFragment.java

@@ -0,0 +1,51 @@
+package com.katcom.androidFileVault;
+
+import android.os.Bundle;
+import android.support.v4.app.Fragment;
+import android.support.v7.app.AlertDialog;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ImageView;
+
+public class ImageViewerFragment extends Fragment {
+    private static final String ARG_FILE_PATH = "filepath";
+    private static final String ARG_FILE_NAME = "filename";
+
+    private ImageView mImageView;
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
+        View view = inflater.inflate(R.layout.fragment_image_viewer,container,false);
+        String imgPath = getImagePath();
+        String imgName = getImageName();
+        mImageView = view.findViewById(R.id.fragment_image_viwer_image_view); // Bind the controller to the image view in the layout
+        mImageView.setImageBitmap(Utils.getScaledBitmap(getContext(),imgPath,700,700));
+        // Use the Builder class for convenient dialog construction
+        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
+        builder.setView(view);
+
+        // Create the AlertDialog object and return it
+        return view;
+    }
+
+    private String getImagePath() {
+        return (String) getArguments().getSerializable(ARG_FILE_PATH);
+    }
+
+    private String getImageName(){
+        return (String) getArguments().getSerializable(ARG_FILE_NAME);
+    }
+
+
+    public static ImageViewerFragment newInstance(String filename,String filepath){
+        Bundle args = new Bundle();
+        args.putSerializable(ARG_FILE_PATH,filepath);
+        args.putSerializable(ARG_FILE_NAME,filename);
+
+        ImageViewerFragment fragment = new ImageViewerFragment();
+        fragment.setArguments(args);
+        return fragment;
+    }
+
+
+}

app/src/main/java/com/katcom/androidFileVault/PreviewMode.java

@@ -13,7 +13,7 @@ public class PreviewMode {
     final public static String FILE_DETAIL = "File Detail";
     final public static String PREVIEW_SMALL = "Preview Small";
     final public static String PREVIEW_MEDIUM = "Preview Medium";
-    //final public static String PREVIEW_BIG = "Preview Big";
+    final public static String PREVIEW_BIG = "Preview Big";
     private static List<String> modes;
 
     private PreviewMode(){}
@@ -23,6 +23,7 @@ private PreviewMode(){}
          modes.add(FILE_DETAIL);
          modes.add(PREVIEW_SMALL);
          modes.add(PREVIEW_MEDIUM);
+         modes.add(PREVIEW_BIG);
     }
 
     /**

app/src/main/java/com/katcom/androidFileVault/ProtectedFile.java

@@ -14,11 +14,6 @@ public ProtectedFile(String filename,String filepath,UUID id){
         this.id = id;
     }
 
-    public boolean isPicture(){
-        //TODO
-        return false;
-    }
-
     ////////////////////////// Getter and Setter/////////////////////////////////////
     public UUID getId() {
         return id;

app/src/main/java/com/katcom/androidFileVault/Utils.java

@@ -3,6 +3,7 @@
 import android.content.Context;
 import android.content.res.AssetManager;
 import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
 import android.util.Log;
 
 import java.io.BufferedInputStream;
@@ -83,6 +84,42 @@ public static void copyFilesFromAsset(Context context,String source,String targe
         }
     }
 
+    /**
+     * Load scaled picture from file
+     * @param context
+     * @param filepath the location of  file
+     * @param sizeX  the desired width, measured in dp
+     * @param sizeY  the desired height, measured in dp
+     * @return
+     */
+    public static Bitmap getScaledBitmap(Context context,String filepath,int sizeX,int sizeY){
+        BitmapFactory.Options options = new BitmapFactory.Options();
+        options.inJustDecodeBounds = true;
+        BitmapFactory.decodeFile(filepath,options);
+
+        float srcWidth = options.outWidth;
+        float srcHeight = options.outHeight;
+
+        float targetWidth = Utils.dip2px(context,sizeX);
+        float targetHeight = Utils.dip2px(context,sizeY);
+
+        // Scale the picture
+        int inSampleSize = 1;
+        if(srcHeight > targetHeight || srcHeight > targetHeight){
+            if(srcWidth > targetWidth){
+                inSampleSize = Math.round(srcWidth/targetWidth);
+            }else{
+                inSampleSize = Math.round(srcHeight/targetHeight);
+            }
+        }
+
+        options = new BitmapFactory.Options();
+        options.inSampleSize = inSampleSize;
+
+        return BitmapFactory.decodeFile(filepath,options);
+    }
+
+
     /**
      *  Calculate px (pixel) from dp
      * @param context