2014-03-24 09:48:19 -04:00
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package com.example.hw4;
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2014-03-24 14:41:32 -04:00
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import java.net.URL;
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2014-03-24 10:02:07 -04:00
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import android.os.AsyncTask;
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2014-03-24 09:48:19 -04:00
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import android.os.Bundle;
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import android.app.Activity;
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2014-03-24 14:41:32 -04:00
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import android.app.ProgressDialog;
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import android.graphics.Bitmap;
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2014-03-24 14:41:32 -04:00
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import android.graphics.BitmapFactory;
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2014-03-24 09:48:19 -04:00
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import android.view.Menu;
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import android.view.View;
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2014-03-24 14:41:32 -04:00
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import android.widget.ImageView;
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2014-03-24 09:48:19 -04:00
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public class ImageViewerActivity extends Activity {
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int urlsId;
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String[] urls;
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int currentIndex;
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2014-03-24 14:41:32 -04:00
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ProgressDialog dialog;
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2014-03-24 09:48:19 -04:00
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_image_viewer);
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2014-03-24 10:02:07 -04:00
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Bundle extras = getIntent().getExtras();
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urlsId = extras.getInt("urls");
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urls = getResources().getStringArray(urlsId);
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currentIndex = extras.getInt("index");
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2014-03-24 14:41:32 -04:00
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displayImage(currentIndex);
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2014-03-24 09:48:19 -04:00
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}
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@Override
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public boolean onCreateOptionsMenu(Menu menu) {
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// Inflate the menu; this adds items to the action bar if it is present.
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getMenuInflater().inflate(R.menu.image_viewer, menu);
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return true;
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}
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public void onClickPrev(View v) {
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displayPrev();
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}
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public void onClickNext(View v) {
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displayNext();
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}
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public void onClickBack(View v) {
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finish();
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}
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private void displayPrev() {
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// Wrapping backwards requires more than just modulo
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if (currentIndex == 0)
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currentIndex = urls.length - 1;
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else
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currentIndex -= 1;
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2014-03-24 10:07:09 -04:00
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displayImage(currentIndex);
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}
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private void displayNext() {
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currentIndex = (currentIndex + 1) % urls.length;
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displayImage(currentIndex);
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}
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public void displayImage(int indexToDisplay) {
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ImageView view = (ImageView)findViewById(R.id.imgViewer);
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view.setImageBitmap(null);
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new ImageDownloader().execute(urls[indexToDisplay]);
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dialog = new ProgressDialog(this);
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dialog.setCancelable(false);
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dialog.show();
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}
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private class ImageDownloader extends AsyncTask<String, Void, Bitmap> {
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@Override
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protected Bitmap doInBackground(String... params) {
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try
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{
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URL imageUrl = new URL(params[0]);
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return BitmapFactory.decodeStream(imageUrl.openStream());
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}
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catch(Exception e)
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{
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e.printStackTrace();
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}
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2014-03-24 10:02:07 -04:00
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return null;
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}
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@Override
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protected void onPostExecute(Bitmap result) {
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dialog.cancel();
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ImageView view = (ImageView)findViewById(R.id.imgViewer);
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view.setImageBitmap(result);
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}
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}
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2014-03-24 09:48:19 -04:00
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}
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