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// Developed by Kirk Baucom and published as Public Domain // http://robobunny.com/wp/2013/08/24/android-seekbar-preference-v2/ // Modifications by Adrin Romero as Public Domain //from w ww . j a v a2 s. com package com.adrguides.robobunny; import android.content.Context; import android.content.res.TypedArray; import android.preference.Preference; import android.util.AttributeSet; import android.util.Log; import android.view.View; import android.view.ViewGroup; import android.view.ViewParent; import android.widget.LinearLayout; import android.widget.SeekBar; import android.widget.SeekBar.OnSeekBarChangeListener; import android.widget.TextView; import com.adrguides.R; import java.text.DecimalFormat; public class SeekBarLogPreference extends Preference implements OnSeekBarChangeListener { private final String TAG = getClass().getName(); private static final String ANDROIDNS="http://schemas.android.com/apk/res/android"; private static final String APPLICATIONNS="http://robobunny.com"; private static final int DEFAULT_VALUE = 50; private int mMaxValue = 100; private int mMinValue = 0; private int mInterval = 1; private int mCurrentValue; private String mUnitsLeft = ""; private String mUnitsRight = ""; private SeekBar mSeekBar; private double exponent = 2.0; private double factor = 0.10; private DecimalFormat format = new DecimalFormat("#,##0%"); private TextView mStatusText; public SeekBarLogPreference(Context context, AttributeSet attrs) { super(context, attrs); initPreference(context, attrs); } public SeekBarLogPreference(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); initPreference(context, attrs); } private void initPreference(Context context, AttributeSet attrs) { setValuesFromXml(attrs); mSeekBar = new SeekBar(context, attrs); mSeekBar.setMax(mMaxValue - mMinValue); mSeekBar.setOnSeekBarChangeListener(this); setWidgetLayoutResource(R.layout.seek_bar_preference); } private void setValuesFromXml(AttributeSet attrs) { mMaxValue = attrs.getAttributeIntValue(ANDROIDNS, "max", 100); mMinValue = attrs.getAttributeIntValue(APPLICATIONNS, "min", 0); mUnitsLeft = getAttributeStringValue(attrs, APPLICATIONNS, "unitsLeft", ""); String units = getAttributeStringValue(attrs, APPLICATIONNS, "units", ""); mUnitsRight = getAttributeStringValue(attrs, APPLICATIONNS, "unitsRight", units); try { String newInterval = attrs.getAttributeValue(APPLICATIONNS, "interval"); if(newInterval != null) mInterval = Integer.parseInt(newInterval); } catch(Exception e) { Log.e(TAG, "Invalid interval value", e); } format = new DecimalFormat(getAttributeStringValue(attrs, APPLICATIONNS, "format", "#,##0%")); exponent = attrs.getAttributeFloatValue(APPLICATIONNS, "exponent", 2.0f); factor = attrs.getAttributeFloatValue(APPLICATIONNS, "factor", 0.1f); } private String getAttributeStringValue(AttributeSet attrs, String namespace, String name, String defaultValue) { String value = attrs.getAttributeValue(namespace, name); if(value == null) value = defaultValue; return value; } @Override protected View onCreateView(ViewGroup parent) { View view = super.onCreateView(parent); // The basic preference layout puts the widget frame to the right of the title and summary, // so we need to change it a bit - the seekbar should be under them. LinearLayout layout = (LinearLayout) view; layout.setOrientation(LinearLayout.VERTICAL); return view; } @Override public void onBindView(View view) { super.onBindView(view); try { // move our seekbar to the new view we've been given ViewParent oldContainer = mSeekBar.getParent(); ViewGroup newContainer = (ViewGroup) view.findViewById(R.id.seekBarPrefBarContainer); if (oldContainer != newContainer) { // remove the seekbar from the old view if (oldContainer != null) { ((ViewGroup) oldContainer).removeView(mSeekBar); } // remove the existing seekbar (there may not be one) and add ours newContainer.removeAllViews(); newContainer.addView(mSeekBar, ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT); } } catch(Exception ex) { Log.e(TAG, "Error binding view: " + ex.toString()); } //if dependency is false from the beginning, disable the seek bar if (view != null && !view.isEnabled()) { mSeekBar.setEnabled(false); } updateView(view); } /** * Update a SeekBarPreference view with our current state * @param view */ protected void updateView(View view) { try { mStatusText = (TextView) view.findViewById(R.id.seekBarPrefValue); mStatusText.setText(calculateDisplayedValue(mCurrentValue)); mStatusText.setMinimumWidth(30); mSeekBar.setProgress(mCurrentValue - mMinValue); TextView unitsRight = (TextView)view.findViewById(R.id.seekBarPrefUnitsRight); unitsRight.setText(mUnitsRight); TextView unitsLeft = (TextView)view.findViewById(R.id.seekBarPrefUnitsLeft); unitsLeft.setText(mUnitsLeft); } catch(Exception e) { Log.e(TAG, "Error updating seek bar preference", e); } } @Override public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { int newValue = progress + mMinValue; if(newValue > mMaxValue) newValue = mMaxValue; else if(newValue < mMinValue) newValue = mMinValue; else if(mInterval != 1 && newValue % mInterval != 0) newValue = Math.round(((float)newValue)/mInterval)*mInterval; // change rejected, revert to the previous value if(!callChangeListener(newValue)){ seekBar.setProgress(mCurrentValue - mMinValue); return; } // change accepted, store it mCurrentValue = newValue; mStatusText.setText(calculateDisplayedValue(newValue)); persistInt(newValue); } private String calculateDisplayedValue(int value) { return format.format(Math.pow(exponent, value * factor)); } @Override public void onStartTrackingTouch(SeekBar seekBar) {} @Override public void onStopTrackingTouch(SeekBar seekBar) { notifyChanged(); } @Override protected Object onGetDefaultValue(TypedArray ta, int index){ int defaultValue = ta.getInt(index, DEFAULT_VALUE); return defaultValue; } @Override protected void onSetInitialValue(boolean restoreValue, Object defaultValue) { if(restoreValue) { mCurrentValue = getPersistedInt(mCurrentValue); } else { int temp = 0; try { temp = (Integer)defaultValue; } catch(Exception ex) { Log.e(TAG, "Invalid default value: " + defaultValue.toString()); } persistInt(temp); mCurrentValue = temp; } } /** * make sure that the seekbar is disabled if the preference is disabled */ @Override public void setEnabled(boolean enabled) { super.setEnabled(enabled); mSeekBar.setEnabled(enabled); } @Override public void onDependencyChanged(Preference dependency, boolean disableDependent) { super.onDependencyChanged(dependency, disableDependent); //Disable movement of seek bar when dependency is false if (mSeekBar != null) { mSeekBar.setEnabled(!disableDependent); } } }