I forgot to add the java files!

Damn it

app/src/main/java/net/rachel030219/hashchecker/AboutActivity.java

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+/*
+ Copyright 2016 Rachel030219
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ */
+package net.rachel030219.hashchecker;
+
+import android.os.Build;
+import android.os.Bundle;
+import android.net.Uri;
+import android.view.View;
+import android.view.MenuItem;
+import android.view.WindowManager;
+import android.widget.TextView;
+import android.content.Intent;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.res.Resources;
+
+import android.support.v7.app.ActionBar;
+import android.support.v7.app.AlertDialog;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.Toolbar;
+
+public class AboutActivity extends AppCompatActivity{
+	TextView mPreferenceFragmentCompat;
+	TextView mMaterialSettingsActivityDemo;
+
+	TextView mAboutMe;
+
+	@Override
+	public void onCreate(Bundle savedInstanceState){
+		super.onCreate(savedInstanceState);
+		setContentView(R.layout.about);
+
+		Toolbar mToolbar = (Toolbar)findViewById(R.id.about_toolbar);
+		mToolbar.setTitle(getTitle());
+		setSupportActionBar(mToolbar);
+
+		ActionBar mActionBar = getSupportActionBar();
+		mActionBar.setHomeButtonEnabled(true);
+		mActionBar.setDisplayHomeAsUpEnabled(true);
+
+		if (Build.VERSION.SDK_INT == Build.VERSION_CODES.KITKAT) {
+			WindowManager.LayoutParams localLayoutParams = getWindow().getAttributes();    
+			localLayoutParams.flags = (WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS | localLayoutParams.flags);
+		}
+
+		bindViews();
+	}
+
+	private void bindViews(){
+		Resources res = getResources();
+		mPreferenceFragmentCompat = (TextView)findViewById(R.id.about_projects_preferencefragment);
+		mPreferenceFragmentCompat.setOnClickListener(new OnProjectClick(this,res.getString(R.string.about_projects_preferencefragment),res.getString(R.string.about_projects_preferencefragment_license),"https://github.com/Machinarius/PreferenceFragment-Compat"));
+		mMaterialSettingsActivityDemo = (TextView)findViewById(R.id.about_projects_materialsettingsactivitydemo);
+		mMaterialSettingsActivityDemo.setOnClickListener(new OnProjectClick(this,res.getString(R.string.about_projects_materialsettingsactivitydemo),res.getString(R.string.about_projects_materialsettingsactivitydemo_license),"https://drakeet.me/material-design-settings-activity"));
+
+		mAboutMe = (TextView)findViewById(R.id.about_me);
+		mAboutMe.setOnClickListener(new View.OnClickListener(){
+			@Override
+			public void onClick(View v){
+				AlertDialog.Builder builder = new AlertDialog.Builder(AboutActivity.this);
+				builder.setTitle(R.string.about_me_title);
+				builder.setMessage(R.string.about_me_content);
+				builder.setPositiveButton("GOT IT",null);
+				builder.show();
+			}
+		});
+	}
+
+	@Override
+	public boolean onOptionsItemSelected(MenuItem item){
+		// TODO: Implement this method
+		switch(item.getItemId()){
+			case android.R.id.home:
+				finish();
+				break;
+		}
+		return true;
+	}
+
+	class OnProjectClick implements View.OnClickListener{
+		Context context;
+		String title;
+		String license;
+		String url;
+
+		OnProjectClick(Context context,String title,String license,String url){
+			this.context = context;
+			this.title = title;
+			this.license = license;
+			this.url = url;
+		}
+
+		@Override
+		public void onClick(View v){
+			AlertDialog.Builder dialog = new AlertDialog.Builder(context);
+			dialog.setTitle(title);
+			dialog.setMessage(license);
+			dialog.setPositiveButton("GOT IT",null);
+			dialog.setNegativeButton("MORE...",new DialogInterface.OnClickListener(){
+				@Override
+				public void onClick(DialogInterface dialog,int i){
+					Uri uri = Uri.parse(url);
+					Intent intent = new Intent(Intent.ACTION_VIEW,uri);
+					startActivity(intent);
+				}
+			});
+			dialog.show();
+		}
+	}
+}

app/src/main/java/net/rachel030219/hashchecker/ClipboardManager.java

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+/*
+ Copyright 2016 Rachel030219
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ */
+package net.rachel030219.hashchecker;
+
+public class ClipboardManager{
+	android.text.ClipboardManager oldManager;
+	android.content.ClipboardManager newManager;
+
+	boolean newAPI = android.os.Build.VERSION.SDK_INT >= 11;
+
+	public ClipboardManager(android.content.Context context){
+		if(newAPI){
+			newManager = (android.content.ClipboardManager)context.getSystemService(context.CLIPBOARD_SERVICE);
+		} else {
+			oldManager = (android.text.ClipboardManager)context.getSystemService(context.CLIPBOARD_SERVICE);
+		}
+	}
+
+	public void set(String text){
+		if(newAPI){
+			newManager.setPrimaryClip(android.content.ClipData.newPlainText(null, text));
+		} else {
+			oldManager.setText(text);
+		}
+	}
+
+	public CharSequence get(){
+		if(newAPI){
+			return newManager.getPrimaryClip().getItemAt(0).getText();
+		} else {
+			return oldManager.getText();
+		}
+	}
+
+	public boolean has(){
+		if(newAPI){
+			return newManager.hasPrimaryClip();
+		} else {
+			return oldManager.hasText();
+		}
+	}
+}

app/src/main/java/net/rachel030219/hashchecker/FileUtils.java

@@ -0,0 +1,158 @@
+/*
+ Copyright 2016 Rachel030219
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ */
+// From Rachel:I got this from a answer under Stack Overflow. Thanks him! 
+
+package net.rachel030219.hashchecker;
+
+import android.os.Build;
+import android.os.Environment;
+import android.net.Uri;
+import android.content.Context;
+import android.content.ContentUris;
+import android.database.Cursor;
+import android.provider.MediaStore;
+import android.provider.DocumentsContract;
+
+public class FileUtils{
+	/**
+	 * Get a file path from a Uri. This will get the the path for Storage Access
+	 * Framework Documents, as well as the _data field for the MediaStore and
+	 * other file-based ContentProviders.
+	 *
+	 * @param context The context.
+	 * @param uri The Uri to query.
+	 * @author paulburke
+	 */
+	public static String getPath(final Context context, final Uri uri) {
+
+		final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
+
+		// DocumentProvider
+		if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
+			// ExternalStorageProvider
+			if (isExternalStorageDocument(uri)) {
+				final String docId = DocumentsContract.getDocumentId(uri);
+				final String[] split = docId.split(":");
+				final String type = split[0];
+
+				if ("primary".equalsIgnoreCase(type)) {
+					return Environment.getExternalStorageDirectory() + "/" + split[1];
+				}
+
+				// TODO handle non-primary volumes
+			}
+			// DownloadsProvider
+			else if (isDownloadsDocument(uri)) {
+
+				final String id = DocumentsContract.getDocumentId(uri);
+				final Uri contentUri = ContentUris.withAppendedId(
+                    Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));
+
+				return getDataColumn(context, contentUri, null, null);
+			}
+			// MediaProvider
+			else if (isMediaDocument(uri)) {
+				final String docId = DocumentsContract.getDocumentId(uri);
+				final String[] split = docId.split(":");
+				final String type = split[0];
+
+				Uri contentUri = null;
+				if ("image".equals(type)) {
+					contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
+				} else if ("video".equals(type)) {
+					contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
+				} else if ("audio".equals(type)) {
+					contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
+				}
+
+				final String selection = "_id=?";
+				final String[] selectionArgs = new String[] {
+                    split[1]
+				};
+
+				return getDataColumn(context, contentUri, selection, selectionArgs);
+			}
+		}
+		// MediaStore (and general)
+		else if ("content".equalsIgnoreCase(uri.getScheme())) {
+			return getDataColumn(context, uri, null, null);
+		}
+		// File
+		else if ("file".equalsIgnoreCase(uri.getScheme())) {
+			return uri.getPath();
+		}
+
+		return null;
+	}
+
+	/**
+	 * Get the value of the data column for this Uri. This is useful for
+	 * MediaStore Uris, and other file-based ContentProviders.
+	 *
+	 * @param context The context.
+	 * @param uri The Uri to query.
+	 * @param selection (Optional) Filter used in the query.
+	 * @param selectionArgs (Optional) Selection arguments used in the query.
+	 * @return The value of the _data column, which is typically a file path.
+	 */
+	public static String getDataColumn(Context context, Uri uri, String selection,
+									   String[] selectionArgs) {
+
+		Cursor cursor = null;
+		final String column = "_data";
+		final String[] projection = {
+            column
+		};
+
+		try {
+			cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs,
+														null);
+			if (cursor != null && cursor.moveToFirst()) {
+				final int column_index = cursor.getColumnIndexOrThrow(column);
+				return cursor.getString(column_index);
+			}
+		} finally {
+			if (cursor != null)
+				cursor.close();
+		}
+		return null;
+	}
+
+
+	/**
+	 * @param uri The Uri to check.
+	 * @return Whether the Uri authority is ExternalStorageProvider.
+	 */
+	public static boolean isExternalStorageDocument(Uri uri) {
+		return "com.android.externalstorage.documents".equals(uri.getAuthority());
+	}
+
+	/**
+	 * @param uri The Uri to check.
+	 * @return Whether the Uri authority is DownloadsProvider.
+	 */
+	public static boolean isDownloadsDocument(Uri uri) {
+		return "com.android.providers.downloads.documents".equals(uri.getAuthority());
+	}
+
+	/**
+	 * @param uri The Uri to check.
+	 * @return Whether the Uri authority is MediaProvider.
+	 */
+	public static boolean isMediaDocument(Uri uri) {
+		return "com.android.providers.media.documents".equals(uri.getAuthority());
+	}
+}