Android Open Source - Easy_Audio_Flash_Cards Easy Audio Flash Cards

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License

The source code is released under:

Copyright (c) 2011, 2012, Hunter Davis All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are m...

Java Source Code

package com.hunterdavis.easyaudioflashcards;
//  ww w .  ja  va  2 s  .co m
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.ContentValues;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.media.MediaPlayer;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Spinner;
import android.widget.Toast;

import com.google.ads.AdRequest;
import com.google.ads.AdView;

public class EasyAudioFlashCards extends Activity {
  /** Called when the activity is first created. */
  // globals
  Uri uriA = null;
  Uri uriI = null;
  Uri tempUriI = null;
  String tempName = null;
  String cardName = null;
  InventorySQLHelper cardData = new InventorySQLHelper(this);
  int SELECT_NAME = 12;
  int SELECT_PICTURE = 22;
  int SELECT_AUDIO = 32;
  ArrayAdapter<String> m_adapterForSpinner;

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    // grab a view to the image and load blank png
    ImageView imgView = (ImageView) findViewById(R.id.ImageView01);
    imgView.setImageResource(R.drawable.blankscreen);

    // photo on click listener
    imgView.setOnClickListener(new OnClickListener() {
      public void onClick(View v) {
        // play the associated audio file
        playSound(v.getContext(), uriA);
      }

    });

    OnClickListener DeleteButtonListner = new OnClickListener() {
      public void onClick(View v) {
        yesnoDeleteHandler("Are you sure?",
            "Are you sure you want to delete?");
      }
    };

    Button deleteButton = (Button) findViewById(R.id.deleteButton);
    deleteButton.setOnClickListener(DeleteButtonListner);

    // Create an anonymous implementation of OnClickListener
    OnClickListener newButtonListner = new OnClickListener() {
      public void onClick(View v) {
        // do something when the button is clicked

        // in onCreate or any event where your want the user to

        AlertDialog.Builder alert = new AlertDialog.Builder(
            v.getContext());

        alert.setTitle("Flash Card Name");
        alert.setMessage("Please Enter A Name For The New Flash Card");

        // Set an EditText view to get user input
        final EditText input = new EditText(v.getContext());
        alert.setView(input);

        alert.setPositiveButton("Ok",
            new DialogInterface.OnClickListener() {
              public void onClick(DialogInterface dialog,
                  int whichButton) {
                tempName = input.getText().toString();

                Cursor tempCursor = getCardCursorByName(tempName);
                if (tempCursor.getCount() > 0) {
                  Toast.makeText(getBaseContext(),
                      "That Name is Already In Use!",
                      Toast.LENGTH_LONG).show();
                } else {
                  // Do something with value!
                  if (tempName.length() > 1) {
                    // select a file
                    Intent intent = new Intent();
                    intent.setType("image/*");
                    intent.setAction(Intent.ACTION_GET_CONTENT);
                    startActivityForResult(
                        Intent.createChooser(intent,
                            "Select Flash Card Image"),
                        SELECT_PICTURE);
                  } else {
                    Toast.makeText(getBaseContext(),
                        "Invalid Name!",
                        Toast.LENGTH_LONG).show();
                  }
                }
              }

            });

        alert.setNegativeButton("Cancel",
            new DialogInterface.OnClickListener() {
              public void onClick(DialogInterface dialog,
                  int whichButton) {
                // Canceled.
              }
            });

        alert.show();

      }
    };

    Button newButton = (Button) findViewById(R.id.newButton);
    newButton.setOnClickListener(newButtonListner);

    // set an adapter for our spinner
    m_adapterForSpinner = new ArrayAdapter<String>(getBaseContext(),
        android.R.layout.simple_spinner_item);
    m_adapterForSpinner
        .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    Spinner spinner = (Spinner) findViewById(R.id.oldcards);
    spinner.setAdapter(m_adapterForSpinner);

    spinner.setOnItemSelectedListener(new MyUnitsOnItemSelectedListener());

    // fill up our spinner item
    Cursor cursor = getCardsCursor();
    if (cursor.getCount() > 0) {
      while (cursor.moveToNext()) {
        String singlecardName = cursor.getString(1);
        m_adapterForSpinner.add(singlecardName);
      }
    } else {
      spinner.setEnabled(false);
    }

    // Look up the AdView as a resource and load a request.
    AdView adView = (AdView) this.findViewById(R.id.adView);
    adView.loadAd(new AdRequest());
  }

  // set up the listener class for spinner
  class MyUnitsOnItemSelectedListener implements OnItemSelectedListener {
    public void onItemSelected(AdapterView<?> parent, View view, int pos,
        long id) {
      // Resources res = getResources();
      // updateSqlValues(rowId, "units", unitsarray[pos]);
      // set both global uri settings from the selected item using a sql
      // cursor
      Spinner spinner = (Spinner) findViewById(R.id.oldcards);
      String spinnerText = spinner.getSelectedItem().toString();
      setGlobalUrisFromName(view.getContext(), spinnerText);
      Button deleteButton = (Button) findViewById(R.id.deleteButton);
      deleteButton.setEnabled(true);

    }

    public void onNothingSelected(AdapterView<?> parent) {
      // Do nothing.
    }
  }

  @Override
  public void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (resultCode == RESULT_OK) {
      if (requestCode == SELECT_PICTURE) {
        tempUriI = data.getData();

        // in onCreate or any event where your want the user to
        // select a file
        Intent intent = new Intent();
        intent.setType("audio/*");
        intent.setAction(Intent.ACTION_GET_CONTENT);
        startActivityForResult(
            Intent.createChooser(intent, "Select Flash Card Audio"),
            SELECT_AUDIO);
      } else if (requestCode == SELECT_AUDIO) {

        uriA = data.getData();
        uriI = tempUriI;
        cardName = tempName;

        // now that we have a picture uri, create a new table entry for
        // this inventory item
        SQLiteDatabase db = cardData.getWritableDatabase();
        ContentValues values = new ContentValues();
        values.put(InventorySQLHelper.NAME, cardName);
        values.put(InventorySQLHelper.URIA, uriA.toString());
        values.put(InventorySQLHelper.URII, uriI.toString());
        long latestRowId = db.insert(InventorySQLHelper.TABLE, null,
            values);
        db.close();
        Spinner spinner = (Spinner) findViewById(R.id.oldcards);
        m_adapterForSpinner.add(cardName);
        spinner.setEnabled(true);
        spinner.setSelection(spinner.getCount());

        Button deleteButton = (Button) findViewById(R.id.deleteButton);
        deleteButton.setEnabled(true);
      }
    }
  }

  public void setGlobalUrisFromName(Context context, String card) {
    Cursor cursor = getCardCursorByName(card);
    if (cursor.getCount() < 1) {
      return;
    }
    cursor.moveToFirst();

    String audioUri = cursor.getString(2);
    String imageUri = cursor.getString(3);
    uriA = Uri.parse(audioUri);
    uriI = Uri.parse(imageUri);
    cardName = card;

    // grab a view to the image and load uri
    ImageView imgView = (ImageView) findViewById(R.id.ImageView01);
    scaleURIAndDisplay(context, uriI, imgView);

  }

  private Cursor getCardsCursor() {
    SQLiteDatabase db = cardData.getReadableDatabase();
    Cursor cursor = db.query(InventorySQLHelper.TABLE, null, null, null,
        null, null, null);
    startManagingCursor(cursor);
    return cursor;
  }

  private Cursor getCardCursorByName(String rowId) {
    SQLiteDatabase db = cardData.getReadableDatabase();
    Cursor cursor = db.query(InventorySQLHelper.TABLE, null, "name = '"
        + rowId + "'", null, null, null, null);
    startManagingCursor(cursor);
    return cursor;
  }

  public void DeleteCardByName(String card) {
    SQLiteDatabase db = cardData.getWritableDatabase();
    db.delete(InventorySQLHelper.TABLE, "name = '" + card + "'", null);
    db.close();

    // clear image view
    uriI = null;
    uriA = null;
    ImageView imgView = (ImageView) findViewById(R.id.ImageView01);
    imgView.setImageResource(R.drawable.blankscreen);

    m_adapterForSpinner.remove(card);

    Spinner spinner = (Spinner) findViewById(R.id.oldcards);
    if (spinner.getCount() == 0) {
      spinner.setEnabled(false);
      Button deleteButton = (Button) findViewById(R.id.deleteButton);
      deleteButton.setEnabled(false);
    }

  }

  public void showError(Context context) {
    Toast.makeText(getBaseContext(), "Please Select An Audio File",
        Toast.LENGTH_SHORT).show();
  }

  public void playSound(Context context, Uri PATH_TO_FILE) {
    if (PATH_TO_FILE == null) {
      showError(context);
      return;
    }
    MediaPlayer mp = new MediaPlayer();
    try {
      mp.setDataSource(context, PATH_TO_FILE);
    } catch (IllegalArgumentException e1) {
      // TODO Auto-generated catch block
      e1.printStackTrace();
      Toast.makeText(context, "Error Playing Audio File!",
          Toast.LENGTH_LONG).show();
    } catch (SecurityException e1) {
      // TODO Auto-generated catch block
      e1.printStackTrace();
      Toast.makeText(context, "Error Playing Audio File!",
          Toast.LENGTH_LONG).show();
    } catch (IllegalStateException e1) {
      // TODO Auto-generated catch block
      e1.printStackTrace();
      Toast.makeText(context, "Error Playing Audio File!",
          Toast.LENGTH_LONG).show();
    } catch (IOException e1) {
      // TODO Auto-generated catch block
      e1.printStackTrace();
      Toast.makeText(context, "Error Playing Audio File!",
          Toast.LENGTH_LONG).show();
    }
    try {
      mp.prepare();
    } catch (IllegalStateException e1) {
      // TODO Auto-generated catch block
      e1.printStackTrace();
      Toast.makeText(context, "Error Playing Audio File!",
          Toast.LENGTH_LONG).show();
    } catch (IOException e1) {
      // TODO Auto-generated catch block
      e1.printStackTrace();
      Toast.makeText(context, "Error Playing Audio File!",
          Toast.LENGTH_LONG).show();
    }
    try {
      mp.start();
    } catch (IllegalStateException e) {
      // TODO Auto-generated catch block
      Toast.makeText(context, "Error Playing Audio File!",
          Toast.LENGTH_LONG).show();
    }

  }

  public Boolean scaleURIAndDisplay(Context context, Uri uri,
      ImageView imgview) {
    double divisorDouble = 400;
    InputStream photoStream;
    try {
      photoStream = context.getContentResolver().openInputStream(uri);
    } catch (FileNotFoundException e) {
      e.printStackTrace();
      return false;
    }
    BitmapFactory.Options options = new BitmapFactory.Options();
    options.inSampleSize = 2;

    Bitmap photoBitmap = BitmapFactory.decodeStream(photoStream, null,
        options);
    if (photoBitmap == null) {
      return false;
    }
    int h = photoBitmap.getHeight()*2;
    int w = photoBitmap.getWidth()*2;

    if ((w > h) && (w > divisorDouble)) {
      double ratio = divisorDouble / w;
      w = (int) divisorDouble;
      h = (int) (ratio * h);
    } else if ((h > w) && (h > divisorDouble)) {
      double ratio = divisorDouble / h;
      h = (int) divisorDouble;
      w = (int) (ratio * w);
    }

    Bitmap scaled = Bitmap.createScaledBitmap(photoBitmap, w, h, true);
    imgview.setImageBitmap(scaled);
    return true;
  }

  protected void yesnoDeleteHandler(String title, String mymessage) {
    new AlertDialog.Builder(this)
        .setMessage(mymessage)
        .setTitle(title)
        .setCancelable(true)
        .setPositiveButton(android.R.string.ok,
            new DialogInterface.OnClickListener() {
              public void onClick(DialogInterface dialog,
                  int whichButton) {
                DeleteCardByName(cardName);

              }
            })
        .setNegativeButton(android.R.string.no,
            new DialogInterface.OnClickListener() {
              public void onClick(DialogInterface dialog,
                  int whichButton) {
              }
            }).show();
  }

}

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