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VolumePreference.javaAPI DocAndroid 5.1 API7517Thu Mar 12 22:22:10 GMT 2015android.preference

VolumePreference

public class VolumePreference extends SeekBarDialogPreference implements PreferenceManager.OnActivityStopListener, View.OnKeyListener, SeekBarVolumizer.Callback
hide

Fields Summary
static final String
TAG
private int
mStreamType
private SeekBarVolumizer
mSeekBarVolumizer
May be null if the dialog isn't visible.
Constructors Summary
public VolumePreference(android.content.Context context, android.util.AttributeSet attrs, int defStyleAttr, int defStyleRes)


     
                    
        super(context, attrs, defStyleAttr, defStyleRes);

        final TypedArray a = context.obtainStyledAttributes(attrs,
                com.android.internal.R.styleable.VolumePreference, defStyleAttr, defStyleRes);
        mStreamType = a.getInt(android.R.styleable.VolumePreference_streamType, 0);
        a.recycle();
public VolumePreference(android.content.Context context, android.util.AttributeSet attrs, int defStyleAttr)

        this(context, attrs, defStyleAttr, 0);
public VolumePreference(android.content.Context context, android.util.AttributeSet attrs)

        this(context, attrs, com.android.internal.R.attr.dialogPreferenceStyle);
Methods Summary
private voidcleanup()
Do clean up. This can be called multiple times!

       getPreferenceManager().unregisterOnActivityStopListener(this);

       if (mSeekBarVolumizer != null) {
           Dialog dialog = getDialog();
           if (dialog != null && dialog.isShowing()) {
               View view = dialog.getWindow().getDecorView()
                       .findViewById(com.android.internal.R.id.seekbar);
               if (view != null) view.setOnKeyListener(null);
               // Stopped while dialog was showing, revert changes
               mSeekBarVolumizer.revertVolume();
           }
           mSeekBarVolumizer.stop();
           mSeekBarVolumizer = null;
       }
public voidonActivityStop()

        if (mSeekBarVolumizer != null) {
            mSeekBarVolumizer.stopSample();
        }
protected voidonBindDialogView(android.view.View view)

        super.onBindDialogView(view);

        final SeekBar seekBar = (SeekBar) view.findViewById(com.android.internal.R.id.seekbar);
        mSeekBarVolumizer = new SeekBarVolumizer(getContext(), mStreamType, null, this);
        mSeekBarVolumizer.start();
        mSeekBarVolumizer.setSeekBar(seekBar);

        getPreferenceManager().registerOnActivityStopListener(this);

        // grab focus and key events so that pressing the volume buttons in the
        // dialog doesn't also show the normal volume adjust toast.
        view.setOnKeyListener(this);
        view.setFocusableInTouchMode(true);
        view.requestFocus();
protected voidonDialogClosed(boolean positiveResult)

        super.onDialogClosed(positiveResult);

        if (!positiveResult && mSeekBarVolumizer != null) {
            mSeekBarVolumizer.revertVolume();
        }

        cleanup();
public booleanonKey(android.view.View v, int keyCode, android.view.KeyEvent event)

        // If key arrives immediately after the activity has been cleaned up.
        if (mSeekBarVolumizer == null) return true;
        boolean isdown = (event.getAction() == KeyEvent.ACTION_DOWN);
        switch (keyCode) {
            case KeyEvent.KEYCODE_VOLUME_DOWN:
                if (isdown) {
                    mSeekBarVolumizer.changeVolumeBy(-1);
                }
                return true;
            case KeyEvent.KEYCODE_VOLUME_UP:
                if (isdown) {
                    mSeekBarVolumizer.changeVolumeBy(1);
                }
                return true;
            case KeyEvent.KEYCODE_VOLUME_MUTE:
                if (isdown) {
                    mSeekBarVolumizer.muteVolume();
                }
                return true;
            default:
                return false;
        }
public voidonMuted(boolean muted)

        // noop
public voidonProgressChanged(android.widget.SeekBar seekBar, int progress, boolean fromTouch)

        // noop
protected voidonRestoreInstanceState(android.os.Parcelable state)

        if (state == null || !state.getClass().equals(SavedState.class)) {
            // Didn't save state for us in onSaveInstanceState
            super.onRestoreInstanceState(state);
            return;
        }

        SavedState myState = (SavedState) state;
        super.onRestoreInstanceState(myState.getSuperState());
        if (mSeekBarVolumizer != null) {
            mSeekBarVolumizer.onRestoreInstanceState(myState.getVolumeStore());
        }
public voidonSampleStarting(SeekBarVolumizer volumizer)

        if (mSeekBarVolumizer != null && volumizer != mSeekBarVolumizer) {
            mSeekBarVolumizer.stopSample();
        }
protected android.os.ParcelableonSaveInstanceState()

        final Parcelable superState = super.onSaveInstanceState();
        if (isPersistent()) {
            // No need to save instance state since it's persistent
            return superState;
        }

        final SavedState myState = new SavedState(superState);
        if (mSeekBarVolumizer != null) {
            mSeekBarVolumizer.onSaveInstanceState(myState.getVolumeStore());
        }
        return myState;
public voidsetStreamType(int streamType)

        mStreamType = streamType;