Java tutorial
/* * Copyright (C) 2011 Andreas Stuetz <andreas.stuetz@gmail.com> * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package saphion.pageindicators; import java.util.ArrayList; import saphion.batterycaster.R; import android.content.Context; import android.content.res.TypedArray; import android.graphics.drawable.Drawable; import android.support.v4.view.ViewPager; import android.util.AttributeSet; import android.view.Gravity; import android.view.View; import android.widget.LinearLayout; import android.widget.TextView; import android.widget.Toast; public class FixedTabsView extends LinearLayout implements ViewPager.OnPageChangeListener { @SuppressWarnings("unused") private static final String TAG = "com.astuetz.viewpager.extensions"; private Context mContext; private ViewPager mPager; private TabsAdapter mAdapter; private ArrayList<View> mTabs = new ArrayList<View>(); private Drawable mDividerDrawable; private int mDividerColor = 0xFF636363; private int mDividerMarginTop = 12; private int mDividerMarginBottom = 21; private int mCurrentPosition = 1; public FixedTabsView(Context context) { this(context, null); } public FixedTabsView(Context context, AttributeSet attrs) { this(context, attrs, 0); } public FixedTabsView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs); this.mContext = context; final TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.ViewPagerExtensions, defStyle, 0); mDividerColor = a.getColor(R.styleable.ViewPagerExtensions_dividerColor, mDividerColor); mDividerMarginTop = a.getDimensionPixelSize(R.styleable.ViewPagerExtensions_dividerMarginTop, mDividerMarginTop); mDividerMarginBottom = a.getDimensionPixelSize(R.styleable.ViewPagerExtensions_dividerMarginBottom, mDividerMarginBottom); mDividerDrawable = a.getDrawable(R.styleable.ViewPagerExtensions_dividerDrawable); a.recycle(); this.setOrientation(LinearLayout.HORIZONTAL); } /** * Sets the data behind this FixedTabsView. * * @param adapter * The {@link TabsAdapter} which is responsible for maintaining * the data backing this FixedTabsView and for producing a view * to represent an item in that data set. */ public void setAdapter(TabsAdapter adapter) { this.mAdapter = adapter; if (mPager != null && mAdapter != null) initTabs(); } /** * Binds the {@link ViewPager} to this View * */ public void setViewPager(ViewPager pager) { this.mPager = pager; mPager.setOnPageChangeListener(this); if (mPager != null && mAdapter != null) initTabs(); } /** * Initialize and add all tabs to the layout */ private void initTabs() { removeAllViews(); mTabs.clear(); if (mAdapter == null) return; for (int i = 0; i < mPager.getAdapter().getCount(); i++) { final int index = i; View tab = mAdapter.getView(i); LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(0, LayoutParams.WRAP_CONTENT, 1.0f); tab.setLayoutParams(params); this.addView(tab); mTabs.add(tab); if (i != mPager.getAdapter().getCount() - 1) { this.addView(getSeparator()); } tab.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { mPager.setCurrentItem(index); } }); tab.setOnLongClickListener(new OnLongClickListener() { @Override public boolean onLongClick(View v) { //Toast t = new Toast(getContext()); Toast t = Toast.makeText(mContext, "", Toast.LENGTH_SHORT); //t.setGravity(Gravity.TOP, v.getRight()/2 - v.getLeft()/2, v.getBottom()); switch (index) { case 0: t.setText("Power Profiles"); t.setGravity(Gravity.TOP | Gravity.LEFT, v.getLeft(), v.getBottom()); break; case 1: t.setText("Battery Info"); t.setGravity(Gravity.TOP | Gravity.CENTER_HORIZONTAL, 0, v.getBottom()); break; case 2: t.setText("Graph and Stats"); t.setGravity(Gravity.TOP | Gravity.CENTER_HORIZONTAL, 0, v.getBottom()); break; case 3: t.setText("Battery Alarms"); t.setGravity(Gravity.TOP, v.getLeft(), v.getBottom()); break; } t.setDuration(Toast.LENGTH_SHORT); t.show(); return true; } }); } selectTab(mPager.getCurrentItem()); } @Override public void onPageScrollStateChanged(int state) { } @Override public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { } @Override public void onPageSelected(int position) { selectTab(position); mCurrentPosition = position; } public int getPosition() { return mCurrentPosition; } public void setPosition(int mPos) { mCurrentPosition = mPos; } /** * Creates and returns a new Separator View * * @return */ @SuppressWarnings("deprecation") private View getSeparator() { View v = new View(mContext); LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(1, LayoutParams.MATCH_PARENT); params.setMargins(0, mDividerMarginTop, 0, mDividerMarginBottom); v.setLayoutParams(params); if (mDividerDrawable != null) v.setBackgroundDrawable(mDividerDrawable); else v.setBackgroundColor(mDividerColor); return v; } /** * Runs through all tabs and sets if they are currently selected. * * @param position * The position of the currently selected tab. */ private void selectTab(int position) { // Log.Toast(getContext(), "" + position, Toast.LENGTH_LONG); ((TextView) mTabs.get(position)).setCompoundDrawablesWithIntrinsicBounds(null, mContext.getResources().getDrawable(getIcon(position, true)), null, null); for (int i = 0; i < 4; i++) if (i != position) ((TextView) mTabs.get(i)).setCompoundDrawablesWithIntrinsicBounds(null, mContext.getResources().getDrawable(getIcon(i, false)), null, null); for (int i = 0, pos = 0; i < getChildCount(); i++) { if (this.getChildAt(i) instanceof ViewPagerTabButton) { this.getChildAt(i).setSelected(pos == position); pos++; } } } private int getIcon(int i, boolean b) { if (b) switch (i) { case 0: return R.drawable.power; case 1: return R.drawable.battery_icon_activated; case 2: return R.drawable.graph_icon_activated; case 3: return R.drawable.alarm; } else switch (i) { case 0: return R.drawable.power_normal; case 1: return R.drawable.battery_icon_normal1; case 2: return R.drawable.graph_icon_normal; case 3: return R.drawable.alarm_normal; } return 0; } }