SeekBarPreference
*
* @param context The current context
* @param attrs The attributes of the view
* @param defStyle The resource with the style
*/
public SeekBarPreference(
Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
setMax(100);
setLayoutResource(R.layout.preference_widget_seekbar);
}
/**
* Constructor of SeekBarPreference
*
* @param context The current context
* @param attrs The attributes of the view
*/
public SeekBarPreference(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
/**
* Constructor of SeekBarPreference
*
* @param context The current context
*/
public SeekBarPreference(Context context) {
this(context, null);
}
/**
* {@inheritDoc}
*/
@Override
protected void onBindView(View view) {
super.onBindView(view);
SeekBar seekBar = (SeekBar) view.findViewById(R.id.seekbar);
seekBar.setOnSeekBarChangeListener(this);
seekBar.setMax(mMax);
seekBar.setProgress(mProgress);
seekBar.setEnabled(isEnabled());
}
/**
* {@inheritDoc}
*/
@Override
@SuppressWarnings("boxing")
protected void onSetInitialValue(boolean restoreValue, Object defaultValue) {
setProgress(restoreValue ? getPersistedInt(mProgress) : (Integer) defaultValue);
}
/**
* {@inheritDoc}
*/
@Override
@SuppressWarnings("boxing")
protected Object onGetDefaultValue(TypedArray a, int index) {
return a.getInt(index, 0);
}
/**
* Allows a Preference to intercept key events without having focus.
* For example, SeekBarPreference uses this to intercept +/- to adjust
* the progress.
*
* @param v The view
* @param keyCode The key code
* @param event The key event
* @return True if the Preference handled the key. Returns false by default.
*/
public boolean onKey(View v, int keyCode, KeyEvent event) {
if (event.getAction() != KeyEvent.ACTION_UP) {
if (keyCode == KeyEvent.KEYCODE_PLUS
|| keyCode == KeyEvent.KEYCODE_EQUALS) {
setProgress(getProgress() + 1);
return true;
}
if (keyCode == KeyEvent.KEYCODE_MINUS) {
setProgress(getProgress() - 1);
return true;
}
}
return false;
}
/**
* Method that set the maximum progress
*
* @param max The maximum progress
*/
public void setMax(int max) {
if (max != mMax) {
mMax = max;
notifyChanged();
}
}
/**
* Method that set the actual progress
*
* @param progress The actual progress
*/
public void setProgress(int progress) {
setProgress(progress, true);
}
/**
* Method that set the actual progress
*
* @param progress The actual progress
* @param notifyChanged Whether notify if the progress was changed
*/
protected void setProgress(int progress, boolean notifyChanged) {
int p = progress;
if (p > mMax) {
p = mMax;
}
if (p < 0) {
p = 0;
}
if (p != mProgress) {
mProgress = p;
persistInt(p);
if (notifyChanged) {
notifyChanged();
}
}
}
/**
* Method that returns the current progress
*
* @return int The current progress
*/
public int getProgress() {
return mProgress;
}
/**
* Persist the seekBar's progress value if callChangeListener
*
* returns boolean True, otherwise set the seekBar's progress to the stored value
*/
@SuppressWarnings("boxing")
void syncProgress(SeekBar seekBar) {
int progress = seekBar.getProgress();
if (progress != mProgress) {
if (callChangeListener(progress)) {
setProgress(progress, false);
} else {
seekBar.setProgress(mProgress);
}
}
}
/**
* {@inheritDoc}
*/
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
if (fromUser && !mTrackingTouch) {
syncProgress(seekBar);
}
}
/**
* {@inheritDoc}
*/
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
mTrackingTouch = true;
}
/**
* {@inheritDoc}
*/
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
mTrackingTouch = false;
if (seekBar.getProgress() != mProgress) {
syncProgress(seekBar);
}
}
/**
* {@inheritDoc}
*/
@Override
protected Parcelable onSaveInstanceState() {
/*
* Suppose a client uses this preference type without persisting. We
* must save the instance state so it is able to, for example, survive
* orientation changes.
*/
final Parcelable superState = super.onSaveInstanceState();
if (isPersistent()) {
// No need to save instance state since it's persistent
return superState;
}
// Save the instance state
final SavedState myState = new SavedState(superState);
myState.progress = mProgress;
myState.max = mMax;
return myState;
}
/**
* {@inheritDoc}
*/
@Override
protected void onRestoreInstanceState(Parcelable state) {
if (!state.getClass().equals(SavedState.class)) {
// Didn't save state for us in onSaveInstanceState
super.onRestoreInstanceState(state);
return;
}
// Restore the instance state
SavedState myState = (SavedState) state;
super.onRestoreInstanceState(myState.getSuperState());
mProgress = myState.progress;
mMax = myState.max;
notifyChanged();
}
/**
* SavedState, a subclass of {@link BaseSavedState}, will store the state
* of MyPreference, a subclass of Preference.
*
* It is important to always call through to super methods.
*/
private static class SavedState extends BaseSavedState {
int progress;
int max;
public SavedState(Parcel source) {
super(source);
// Restore the click counter
progress = source.readInt();
max = source.readInt();
}
@Override
public void writeToParcel(Parcel dest, int flags) {
super.writeToParcel(dest, flags);
// Save the click counter
dest.writeInt(progress);
dest.writeInt(max);
}
public SavedState(Parcelable superState) {
super(superState);
}
@SuppressWarnings({"unused", "hiding"})
public static final Parcelable.Creator