Android Open Source - DailySelfie Main Activity

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License

The source code is released under:

MIT License

Java Source Code

package com.coursera.dailyselfie;
/*  ww w. ja va 2 s .c  o m*/
import java.io.File;
import java.io.FileFilter;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;

import android.app.Activity;
import android.app.AlarmManager;
import android.app.ListActivity;
import android.app.PendingIntent;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.os.SystemClock;
import android.provider.MediaStore;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ImageView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;

public class MainActivity extends ListActivity {
  
  private static final String TAG = "DAILY_SELFIE";
  private static final int REQUEST_IMAGE_CAPTURE = 1;
  private static final long ALARM_DELAY = 2 * 60 * 1000L; // 2 Minutes
  private static final String FILE_PREFIX = "SELFIE_";
  private String mCurrentPhotoPath;
  private AlarmManager mAlarmManager;
  private Intent mNotificationReceiverIntent;
  private PendingIntent mNotificationReceiverPendingIntent;
  private SelfieViewAdapter mAdapter;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    
    mAdapter = new SelfieViewAdapter(getApplicationContext());
    setListAdapter(mAdapter);
    
    initFileList();
    
    mAlarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);
    
    mNotificationReceiverIntent = new Intent(MainActivity.this, AlarmNotificationReceiver.class);
    mNotificationReceiverPendingIntent = PendingIntent.getBroadcast(MainActivity.this, 0, mNotificationReceiverIntent, 0);
    
    mAlarmManager.setRepeating(AlarmManager.ELAPSED_REALTIME, 
        SystemClock.elapsedRealtime() + ALARM_DELAY, 
        ALARM_DELAY, 
        mNotificationReceiverPendingIntent);
    
    getListView().setOnItemClickListener(new OnItemClickListener() {
      @Override
      public void onItemClick(AdapterView<?>adapter, View v, int position, long arg3) {
        String filename = (String) mAdapter.getItem(position);
        Intent intent = new Intent(MainActivity.this, ViewSelfieActivity.class);
        intent.putExtra("filename", filename);
        startActivity(intent);
      }
    });
  }
  
  private void initFileList() {
    File path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
    File files[] = path.listFiles(new SelfieFileFilter());
    
    for (int i = 0; i < files.length; ++i) {
      String filename = "file:" + files[i];
      mAdapter.add(filename);
    }
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();
    if (id == R.id.action_settings) {
      dispatchTakePictureIntent();
      return true;
    }
    return super.onOptionsItemSelected(item);
  }
  
  private void dispatchTakePictureIntent() {
    Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    
    if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
      
      File photoFile = null;
      
      try {
        photoFile = createImageFile();
      } catch (IOException ex) {
        Log.e(TAG, "Failed to create image file");
      }
      
      if (photoFile != null) {
        takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photoFile));
        startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
      }
    }
  }
  
  @Override
  protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK)
    {
      mAdapter.add(mCurrentPhotoPath);
      galleryAddPic(mCurrentPhotoPath);
    }
  }
  
  private File createImageFile() throws IOException {
    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.UK).format(new Date());
    String imageFileName = FILE_PREFIX + timeStamp + ".jpg";
    File storageDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
    
    if (!storageDir.exists())
      storageDir.mkdirs();

    //File image = File.createTempFile(imageFileName, ".jpg", storageDir);
    File image = new File(storageDir, imageFileName);
    
    mCurrentPhotoPath = "file:" + image.getAbsolutePath();
    return image;
  }
  
  private void galleryAddPic(String filePath) {
    Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
    File f = new File(filePath);
    Uri contentUri = Uri.fromFile(f);
    mediaScanIntent.setData(contentUri);
    this.sendBroadcast(mediaScanIntent);
  }
  
  public class SelfieFileFilter implements FileFilter {
    @Override
    public boolean accept(File pathname) {
      if (!pathname.isDirectory() && pathname.isFile() && pathname.getName().toString().startsWith(FILE_PREFIX)) {
        return true;
      }
      
      return false;
    }
  }
}

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