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PresentationActivity.java
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PresentationActivity.java
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package com.aspose.slides.demoapp;
import android.content.Intent;
import android.content.res.Configuration;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.DefaultItemAnimator;
import android.support.v7.widget.DividerItemDecoration;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.DisplayMetrics;
import android.util.Log;
import android.util.Size;
import android.view.View;
import android.widget.ImageView;
import android.widget.ProgressBar;
import com.aspose.slides.Presentation;
import java.io.IOException;
import java.io.InputStream;
public class PresentationActivity extends AppCompatActivity {
private static final String TAG = "Aspose.Slides.PresentationActivity";
private static final int READ_REQUEST_CODE = 42;
private SlidesApp app;
private ProgressBar progressBar;
private RecyclerView slideList;
private SlidesAdapter slidesAdapter;
private ImageView currSlide;
private Size currSlideViewSize;
private Size slidesListViewSize;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_presentation);
DisplayMetrics displayMetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
Size displaySize = new Size(displayMetrics.widthPixels - 100, displayMetrics.heightPixels - 100);
this.currSlideViewSize = new Size(displaySize.getWidth() * 3 / 4, displaySize.getHeight() * 3 / 4);
if(getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {
this.slidesListViewSize = new Size(displaySize.getWidth() / 4, displaySize.getWidth() / 4);
} else {
this.slidesListViewSize = new Size(displaySize.getHeight() / 4, displaySize.getHeight() / 4);
}
this.app = (SlidesApp) getApplication();
this.progressBar = findViewById(R.id.progress_bar);
this.slideList = findViewById(R.id.slide_list);
this.currSlide = findViewById(R.id.curr_slide);
this.slidesAdapter = new SlidesAdapter(slidesListViewSize, new OnSlideClickListener(this));
int slideListOrientation = getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE ? RecyclerView.VERTICAL : RecyclerView.HORIZONTAL;
this.slideList.setAdapter(this.slidesAdapter);
this.slideList.setLayoutManager(new LinearLayoutManager(getApplicationContext(), slideListOrientation, false));
this.slideList.setItemAnimator(new DefaultItemAnimator());
this.slideList.addItemDecoration(new DividerItemDecoration(this, slideListOrientation));
execFilePicker();
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent resultData) {
if (requestCode == READ_REQUEST_CODE && resultCode == RESULT_OK && resultData != null) {
Uri uri = resultData.getData();
try {
execLoadPresentation(uri);
} catch (IOException e) {
Log.e(TAG, "IOException while processing uri: " + uri.toString());
execGoBack();
}
} else {
execGoBack();
}
}
private void execFilePicker() {
Intent mRequestFileIntent = new Intent(Intent.ACTION_GET_CONTENT);
mRequestFileIntent.setType("*/*");
startActivityForResult(mRequestFileIntent, READ_REQUEST_CODE);
}
private void execLoadPresentation(Uri uri) throws IOException {
InputStream input = getContentResolver().openInputStream(uri);
new LoadPresentationTask(this).execute(input);
}
private void execGoBack() {
//go back to MainActivity
Intent openPresentationIntent = new Intent(this, MainActivity.class);
startActivity(openPresentationIntent);
}
private void selectSlide(int pos) {
new SelectSlideTask(this).execute(pos);
}
private void showProgressBar() {
progressBar.setVisibility(View.VISIBLE);
progressBar.bringToFront();
}
private void hideProgressBar() {
progressBar.setVisibility(View.GONE);
}
private static class OnSlideClickListener implements View.OnClickListener {
private final PresentationActivity presentationActivity;
private OnSlideClickListener(PresentationActivity presentationActivity) {
this.presentationActivity = presentationActivity;
}
@Override
public void onClick(View view) {
int itemPos = presentationActivity.slideList.getChildLayoutPosition(view);
presentationActivity.selectSlide(itemPos);
}
}
private static class LoadPresentationTask extends AsyncTask<InputStream, Void, Presentation> {
private final PresentationActivity presentationActivity;
private LoadPresentationTask(PresentationActivity presentationActivity) {
this.presentationActivity = presentationActivity;
}
@Override
protected Presentation doInBackground(InputStream... inputs) {
InputStream input = inputs[0];
try {
Presentation p = input == null ? new Presentation() : new Presentation(input);
presentationActivity.app.setPresentation(p, presentationActivity.currSlideViewSize, presentationActivity.slidesListViewSize);
return p;
} finally {
try {
if(input != null) {
input.close();
}
} catch (IOException e) {
Log.e(TAG, "IOException while closing input stream", e);
}
}
}
@Override
protected void onPreExecute() {
presentationActivity.showProgressBar();
}
@Override
protected void onPostExecute(Presentation presentation) {
presentationActivity.hideProgressBar();
presentationActivity.slidesAdapter.setSlides(presentationActivity.app.getSlideList());
presentationActivity.selectSlide(0);
}
@Override
protected void onCancelled(Presentation presentation) {
presentationActivity.hideProgressBar();
}
@Override
protected void onCancelled() {
presentationActivity.hideProgressBar();
}
}
private static class SelectSlideTask extends AsyncTask<Integer, Void, Bitmap> {
private final PresentationActivity presentationActivity;
public SelectSlideTask(PresentationActivity presentationActivity) {
this.presentationActivity = presentationActivity;
}
@Override
protected Bitmap doInBackground(Integer... ints) {
int pos = ints[0];
return presentationActivity.app.selectSlide(pos);
}
@Override
protected void onPreExecute() {
presentationActivity.showProgressBar();
}
@Override
protected void onPostExecute(Bitmap result) {
presentationActivity.hideProgressBar();
presentationActivity.currSlide.setImageBitmap(result);
}
@Override
protected void onCancelled(Bitmap result) {
presentationActivity.hideProgressBar();
}
@Override
protected void onCancelled() {
presentationActivity.hideProgressBar();
}
}
}