Java tutorial
/* * Copyright (C) 2014 The Android Open Source Project * * 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 com.example.android.navigationdrawer; import android.app.Activity; import android.app.AlertDialog; import android.app.Dialog; import android.app.Fragment; import android.app.FragmentManager; import android.app.FragmentTransaction; import android.content.DialogInterface; import android.content.Intent; import android.content.res.Configuration; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Point; import android.graphics.drawable.BitmapDrawable; import android.os.Bundle; import android.os.Environment; import android.support.v4.app.ActionBarDrawerToggle; import android.support.v4.app.DialogFragment; import android.support.v4.view.GravityCompat; import android.support.v4.widget.DrawerLayout; import android.support.v7.widget.LinearLayoutManager; import android.support.v7.widget.RecyclerView; import android.util.Log; import android.view.Display; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.View.OnClickListener; import android.view.Window; import android.view.WindowManager; import android.widget.EditText; import android.widget.ImageView; import android.widget.TextView; import com.comp4905.jasonfleischer.midimusic.R; import com.google.zxing.BarcodeFormat; import com.google.zxing.WriterException; import com.midisheetmusic.ChooseSongActivity; import com.midisheetmusic.FileUri; import com.midisheetmusic.MidiFile; import com.midisheetmusic.MidiFileReader; import com.midisheetmusic.MidiSheetMusicActivity; import com.midisheetmusic.SheetMusic; import com.midisheetmusic.SheetMusicActivity; import com.ringdroid.RingdroidSelectActivity; import java.io.File; import java.io.FileOutputStream; import java.util.ArrayList; import java.util.List; //import info.androidhive.loginandregistration.LoginActivity; /** * This example illustrates a common usage of the DrawerLayout widget * in the Android support library. * <p/> * <p>When a navigation (left) drawer is present, the host activity should detect presses of * the action bar's Up affordance as a signal to open and close the navigation drawer. The * ActionBarDrawerToggle facilitates this behavior. * Items within the drawer should fall into one of two categories:</p> * <p/> * <ul> * <li><strong>View switches</strong>. A view switch follows the same basic policies as * list or tab navigation in that a view switch does not create navigation history. * This pattern should only be used at the root activity of a task, leaving some form * of Up navigation active for activities further down the navigation hierarchy.</li> * <li><strong>Selective Up</strong>. The drawer allows the user to choose an alternate * parent for Up navigation. This allows a user to jump across an app's navigation * hierarchy at will. The application should treat this as it treats Up navigation from * a different task, replacing the current task stack using TaskStackBuilder or similar. * This is the only form of navigation drawer that should be used outside of the root * activity of a task.</li> * </ul> * <p/> * <p>Right side drawers should be used for actions, not navigation. This follows the pattern * established by the Action Bar that navigation should be to the left and actions to the right. * An action should be an operation performed on the current contents of the window, * for example enabling or disabling a data overlay on top of the current content.</p> */ public class QRCode extends Activity implements PlanetAdapter.OnItemClickListener { private static final String LOG_TAG = "QR"; private DrawerLayout mDrawerLayout; private RecyclerView mDrawerList; private ActionBarDrawerToggle mDrawerToggle; private CharSequence mDrawerTitle; private CharSequence mTitle; private String[] mPlanetTitles; final protected static char[] hexArray = "0123456789ABCDEF".toCharArray(); public static String bytesToHex(byte[] bytes) { char[] hexChars = new char[bytes.length * 2]; for (int j = 0; j < bytes.length; j++) { int v = bytes[j] & 0xFF; hexChars[j * 2] = hexArray[v >>> 4]; hexChars[j * 2 + 1] = hexArray[v & 0x0F]; } return new String(hexChars); } public static byte[] hexStringToByteArray(String s) { int len = s.length(); byte[] data = new byte[len / 2]; for (int i = 0; i < len; i += 2) { data[i / 2] = (byte) ((Character.digit(s.charAt(i), 16) << 4) + Character.digit(s.charAt(i + 1), 16)); } return data; } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.qrcode); mTitle = mDrawerTitle = getTitle(); mPlanetTitles = getResources().getStringArray(R.array.planets_array); mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); mDrawerList = (RecyclerView) findViewById(R.id.left_drawer); // set a custom shadow that overlays the main content when the drawer opens mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START); // improve performance by indicating the list if fixed size. mDrawerList.setHasFixedSize(true); mDrawerList.setLayoutManager(new LinearLayoutManager(this)); // set up the drawer's list view with items and click listener mDrawerList.setAdapter(new PlanetAdapter(mPlanetTitles, this)); // enable ActionBar app icon to behave as action to toggle nav drawer getActionBar().setDisplayHomeAsUpEnabled(true); getActionBar().setHomeButtonEnabled(true); // ActionBarDrawerToggle ties together the the proper interactions // between the sliding drawer and the action bar app icon mDrawerToggle = new ActionBarDrawerToggle(this, /* host Activity */ mDrawerLayout, /* DrawerLayout object */ R.drawable.ic_drawer, /* nav drawer image to replace 'Up' caret */ R.string.drawer_open, /* "open drawer" description for accessibility */ R.string.drawer_close /* "close drawer" description for accessibility */ ) { public void onDrawerClosed(View view) { getActionBar().setTitle(mTitle); invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu() } public void onDrawerOpened(View drawerView) { getActionBar().setTitle(mDrawerTitle); invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu() } }; mDrawerLayout.setDrawerListener(mDrawerToggle); if (savedInstanceState == null) { selectItem(2); } HandleClick hc = new HandleClick(); findViewById(R.id.butQR).setOnClickListener(hc); } private class HandleClick implements OnClickListener { public void onClick(View arg0) { Intent intent = new Intent("com.google.zxing.client.android.SCAN"); switch (arg0.getId()) { case R.id.butQR: intent.putExtra("SCAN_MODE", "QR_CODE_MODE"); break; } startActivityForResult(intent, 0); //Barcode Scanner to scan for us } } public void onActivityResult(int requestCode, int resultCode, Intent intent) { if (requestCode == 0) { if (resultCode == RESULT_OK) { Log.i("Result", intent.getStringExtra("SCAN_RESULT")); byte[] bytes = hexStringToByteArray(intent.getStringExtra("SCAN_RESULT")); String mFileName = Environment.getExternalStorageDirectory().getAbsolutePath(); FileOutputStream outputStream; try { outputStream = new FileOutputStream(new File(mFileName, "aQRresult.mid")); outputStream.write(bytes); outputStream.close(); Log.i("file", "Saved as aQRresult.mid"); } catch (Exception e) { e.printStackTrace(); } // TODO what? forgot... intent = new Intent(this, SheetMusicActivity.class); String filePath = Environment.getExternalStorageDirectory().getAbsolutePath() + "aQRresult.mid"; File file = new File(filePath); FileUri song = new FileUri(file.getAbsolutePath()); MidiFileReader midiread = new MidiFileReader(song.getData()); // Pass byte[] raw midi data to SheetMusicActivity View. // String string = intent.getStringExtra("SCAN_RESULT"); Log.i("check", "run here"); // Log.i("string", string); // String[] temp = string.split(" "); // // byte[] bytess = hexStringToByteArray(keith); // int index = 0; // for (String item : temp) // { // bytes[index] = Byte.parseByte(item); // index++; // } // bytess = string.getBytes(); intent.putExtra(SheetMusicActivity.MidiDataID, bytes/*byte array*/); // String print = new String(song.getData()); // Log.i("print3", print); // intent.putExtra(SheetMusicActivity.MidiTitleID, MidiFile.getReadString()); intent.putExtra(SheetMusicActivity.MidiTitleID, "QRmidi"); // Log.i("here", "here"); startActivity(intent); } else if (resultCode == RESULT_CANCELED) { } } } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.navigation_drawer, menu); return true; } /* Called whenever we call invalidateOptionsMenu() */ @Override public boolean onPrepareOptionsMenu(Menu menu) { // If the nav drawer is open, hide action items related to the content view boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList); return super.onPrepareOptionsMenu(menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { // The action bar home/up action should open or close the drawer. // ActionBarDrawerToggle will take care of this. if (mDrawerToggle.onOptionsItemSelected(item)) { return true; } // Handle action buttons switch (item.getItemId()) { default: return super.onOptionsItemSelected(item); } } /* The click listener for RecyclerView in the navigation drawer */ @Override public void onClick(View view, int position) { selectItem(position); Intent intent; switch (position) { // case 0: // intent = new Intent(this, MainActivity.class); // intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); // this.startActivity(intent); // break; case 0: intent = new Intent(this, com.comp4905.jasonfleischer.midimusic.MainActivity.class); intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); this.startActivity(intent); break; case 1: intent = new Intent(this, QRCode.class); intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); this.startActivity(intent); break; case 2: intent = new Intent(this, RingdroidSelectActivity.class); intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); this.startActivity(intent); break; case 3: intent = new Intent(this, ChooseSongActivity.class); intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); this.startActivity(intent); break; case 4: intent = new Intent(this, AboutUs.class); intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); this.startActivity(intent); break; } } private void selectItem(int position) { // update the main content by replacing fragments Fragment fragment = PlanetFragment.newInstance(position); FragmentManager fragmentManager = getFragmentManager(); FragmentTransaction ft = fragmentManager.beginTransaction(); ft.replace(R.id.content_frame, fragment); ft.commit(); // update selected item title, then close the drawer setTitle(mPlanetTitles[position]); mDrawerLayout.closeDrawer(mDrawerList); } @Override public void setTitle(CharSequence title) { mTitle = title; getActionBar().setTitle(mTitle); } /** * When using the ActionBarDrawerToggle, you must call it during * onPostCreate() and onConfigurationChanged()... */ @Override protected void onPostCreate(Bundle savedInstanceState) { super.onPostCreate(savedInstanceState); // Sync the toggle state after onRestoreInstanceState has occurred. mDrawerToggle.syncState(); } @Override public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); // Pass any configuration change to the drawer toggls mDrawerToggle.onConfigurationChanged(newConfig); } /** * Fragment that appears in the "content_frame", shows a planet */ public static class PlanetFragment extends Fragment { public static final String ARG_PLANET_NUMBER = "planet_number"; public PlanetFragment() { // Empty constructor required for fragment subclasses } public static Fragment newInstance(int position) { Fragment fragment = new PlanetFragment(); Bundle args = new Bundle(); args.putInt(PlanetFragment.ARG_PLANET_NUMBER, position); fragment.setArguments(args); return fragment; } } public void onQR(View v) { switch (v.getId()) { case R.id.button1: String qrInputText = MidiFile.readString; //Find screen size WindowManager manager = (WindowManager) getSystemService(WINDOW_SERVICE); Display display = manager.getDefaultDisplay(); Point point = new Point(); display.getSize(point); int width = point.x; int height = point.y; int smallerDimension = width < height ? width : height; smallerDimension = smallerDimension * 3 / 4; //Encode with a QR Code image QRCodeEncoder qrCodeEncoder = new QRCodeEncoder(qrInputText, null, Contents.Type.TEXT, BarcodeFormat.QR_CODE.toString(), smallerDimension); try { Bitmap bitmap = qrCodeEncoder.encodeAsBitmap(); ImageView myImage = (ImageView) findViewById(R.id.imageView1); myImage.setImageBitmap(bitmap); // Get screen size Display display1 = this.getWindowManager().getDefaultDisplay(); Point size = new Point(); display1.getSize(size); int screenWidth = size.x; int screenHeight = size.y; // Get target image size Bitmap bitmap1 = qrCodeEncoder.encodeAsBitmap(); int bitmapHeight = bitmap1.getHeight(); int bitmapWidth = bitmap1.getWidth(); // Scale the image down to fit perfectly into the screen // The value (250 in this case) must be adjusted for phone/tables displays while (bitmapHeight > (screenHeight - 250) || bitmapWidth > (screenWidth - 250)) { bitmapHeight = bitmapHeight / 2; bitmapWidth = bitmapWidth / 2; } // Create resized bitmap image BitmapDrawable resizedBitmap = new BitmapDrawable(this.getResources(), Bitmap.createScaledBitmap(bitmap, bitmapWidth, bitmapHeight, false)); // Create dialog Dialog dialog = new Dialog(this); dialog.requestWindowFeature(Window.FEATURE_NO_TITLE); dialog.setContentView(R.layout.thumbnail); ImageView image = (ImageView) dialog.findViewById(R.id.imageview); // !!! Do here setBackground() instead of setImageDrawable() !!! // image.setBackground(resizedBitmap); // Without this line there is a very small border around the image (1px) // In my opinion it looks much better without it, so the choice is up to you. dialog.getWindow().setBackgroundDrawable(null); dialog.show(); } catch (WriterException e) { e.printStackTrace(); } break; } } }