I'm trying to make an image slideshow for android. What I want for it
is a play and pause button, restart button and a previous image
button. And a seek bar for changing the speed the image change.
At the moment I have the file names of the images stored in a database
and the images on the sd-card. Then, for each image have some text in
the database that I want to load in to a textview at the same time as
the image change.
This is what I've done which almost works. It starts to play but stops
after one or two picture. And the buttons above doesn't work including
the seekbar.
I know this might not be the most sophisticated code but if you know
how to solve my problems or have suggestions of how to make it better,
I'd be greatfull.
private ImageView image = null;
private TextView title = null;
private SeekBar speed = null;
private Button play = null, done = null, restart = null, previous =
null;
private Cursor cursor = null;
private DBase db = null;
private int theSpeed = 900;
private boolean isPlaying = false;
private CountDownTimer show;
private int i = 0, frames = 0;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.image);
image = (ImageView) findViewById(R.id.imageView11);
title = (TextView) findViewById(R.id.textView11);
speed = (SeekBar) findViewById(R.id.seekBar11);
play = (Button) findViewById(R.id.button21);
done = (Button) findViewById(R.id.button22);
restart = (Button) findViewById(R.id.button23);
previous = (Button) findViewById(R.id.button24);
speed.setOnSeekBarChangeListener(this);
play.setOnClickListener(this);
done.setOnClickListener(this);
restart.setOnClickListener(this);
previous.setOnClickListener(this);
db = new DBase(this);
db.open();
SharedPreferences prefs = getPreferences(MODE_PRIVATE);
cursor = db.getAll();
startManagingCursor(cursor);
frames = cursor.getCount();
if (frames != 0) {
cursor.moveToFirst();
if
(cursor.getString(cursor.getColumnIndexOrThrow(DBase._photo)) !=
null){
setImage(cursor.getString(cursor.getColumnIndexOrThrow(DBase._photo)));
setTitle(cursor.getString(cursor.getColumnIndexOrThrow(DBase._date)),cursor.getString(cursor.getColumnIndexOrThrow(DBase._text)));
if (cursor.moveToNext()) theShow(theSpeed);
isPlaying = true;
}
}
}
private void setImage(String photo) {
try {
String path = "/sdcard/App/";
FileInputStream fis = new FileInputStream(path + photo);
Bitmap bitmap = BitmapFactory.decodeStream(fis);
image.setImageBitmap(bitmap);
} catch (Exception e) {
}
}
private void theShow(int speed) {
show = new CountDownTimer(speed, 1000) {
public void onTick(long millisUntilFinished) { }
public void onFinish() {
if
(cursor.getString(cursor.getColumnIndexOrThrow(DBase._photo)) !
= null){
setImage(cursor.getString(cursor.getColumnIndexOrThrow(DBase._photo)));
setTitle(cursor.getString(cursor.getColumnIndexOrThrow(DBase._date)),cursor.getString(cursor.getColumnIndexOrThrow(DBase._text)));
isPlaying = true;
play.setText(getText(R.string.pause).toString());
if (i <= frames) {
i++;
show.start();
}
}
}
}.start();
}
@Override
public void onClick(View arg0) {
switch (arg0.getId()) {
case R.id.button21:
//PLAY/PAUSE Button
if (isPlaying) {
show.cancel();
isPlaying = false;
play.setText(getText(R.string.play).toString());
} else {
theShow(theSpeed);
isPlaying = true;
play.setText(getText(R.string.pause).toString());
}
show.cancel();
break;
case R.id.button22:
//EXIT Button
this.finish();
break;
case R.id.button23:
//RESTART Button
cursor.moveToFirst();
i = 0;
if
(cursor.getString(cursor.getColumnIndexOrThrow(DBase._photo)) !=
null){
setImage(cursor.getString(cursor.getColumnIndexOrThrow(DBase._photo)));
setTitle(cursor.getString(cursor.getColumnIndexOrThrow(DBase._date)),cursor.getString(cursor.getColumnIndexOrThrow(DBase._text)));
if (cursor.moveToNext()) theShow(theSpeed);
}
break;
case R.id.button24:
//SHOW PREVIOUS IMAGE + PAUSE
if (cursor.moveToPrevious()) {
if
(cursor.getString(cursor.getColumnIndexOrThrow(DBase._photo)) !
= null){
setImage(cursor.getString(cursor.getColumnIndexOrThrow(DBase._photo)));
setTitle(cursor.getString(cursor.getColumnIndexOrThrow(DBase._date)),cursor.getString(cursor.getColumnIndexOrThrow(DBase._text)));
if (isPlaying) {
show.cancel();
isPlaying = false;
play.setText(getText(R.string.play).toString());
}
}
}
break;
}
}
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean
fromUser) {
if (progress == 0 ) theSpeed = 2000;
if (progress == 1 ) theSpeed = 1500;
if (progress == 2 ) theSpeed = 1200;
if (progress == 3 ) theSpeed = 900;
if (progress == 4 ) theSpeed = 600;
if (progress == 5 ) theSpeed = 300;
theShow(theSpeed);
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) { }
@Override
public void onStopTrackingTouch(SeekBar seekBar) { }
@Override
public void onDestroy() {
super.onDestroy();
cursor.close();
db.close();
}
//André
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