ColorTrackView
이것 은 텍스트 높이 의 동적 효과 도 추 가 했 습 니 다.https://github.com/hongyangAndroid/ColorTrackView/blob/master/library_ColorTrackView/src/com/zhy/view/ColorTrackView.java https://github.com/hongyangAndroid/ColorTrackView
//사용자 정의 속성
<?xml version="1.0" encoding="utf-8"?>
<resources>
<attr name="text" format="string" />
<attr name="text_size" format="dimension" />
<attr name="text_origin_color" format="color|reference" />
<attr name="text_change_color" format="color|reference" />
<attr name="progress" format="float" />
<attr name="direction">
<enum name="left" value="0" />
<enum name="right" value="1" />
</attr>
<declare-styleable name="ColorTrackView">
<attr name="text" />
<attr name="text_size" />
<attr name="text_origin_color" />
<attr name="text_change_color" />
<attr name="progress" />
<attr name="direction" />
</declare-styleable>
</resources>//사용자 정의 Tab 클래스
public class ColorTrackView extends View {
private int mTextStartX;
public enum Direction {
LEFT, RIGHT;
}
private int mDirection = DIRECTION_LEFT;
private static final int DIRECTION_LEFT = 0;
private static final int DIRECTION_RIGHT = 1;
public void setDirection(int direction) {
mDirection = direction;
}
private String mText = "default String";
private Paint mPaint;
// private int mTextSize = sp2px(30);
private int mTextSize = (int) TypedValue.applyDimension(
TypedValue.COMPLEX_UNIT_SP, 30, getResources().getDisplayMetrics());
private int mTextOriginColor = 0xff000000;
private int mTextChangeColor = 0xffff0000;
private Rect mTextBound = new Rect();
private int mTextWidth;
private int mRealWidth;
private float mProgress;
public ColorTrackView(Context context) {
this(context, null);
}
public ColorTrackView(Context context, AttributeSet attrs) {
super(context, attrs);
mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
TypedArray ta = context.obtainStyledAttributes(attrs,
R.styleable.ColorTrackView);
mText = ta.getString(R.styleable.ColorTrackView_text);
mTextSize = ta.getDimensionPixelSize(
R.styleable.ColorTrackView_text_size, mTextSize);
mTextOriginColor = ta.getColor(
R.styleable.ColorTrackView_text_origin_color, mTextOriginColor);
mTextChangeColor = ta.getColor(
R.styleable.ColorTrackView_text_change_color, mTextChangeColor);
mProgress = ta.getFloat(R.styleable.ColorTrackView_progress, 0);
mDirection = ta
.getInt(R.styleable.ColorTrackView_direction, mDirection);
ta.recycle();
mPaint.setTextSize(mTextSize);
measureText();
}
private void measureText() {
mTextWidth = (int) mPaint.measureText(mText);
mPaint.getTextBounds(mText, 0, mText.length(), mTextBound); // mTextBound
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int width = measureWidth(widthMeasureSpec);
int height = measureHeight(heightMeasureSpec);
setMeasuredDimension(width, height);
mRealWidth = getMeasuredWidth() - getPaddingLeft() - getPaddingRight(); //
mTextStartX = mRealWidth / 2 - mTextWidth / 2; // ,
}
private int measureHeight(int heightMeasureSpec) {
int mode = MeasureSpec.getMode(heightMeasureSpec);
int val = MeasureSpec.getSize(heightMeasureSpec);
int result = 0;
switch (mode) {
case MeasureSpec.EXACTLY:
result = val;
break;
case MeasureSpec.AT_MOST:
case MeasureSpec.UNSPECIFIED:
result = mTextBound.height();
break;
}
result = mode == MeasureSpec.AT_MOST ? Math.min(result, val) : result;
return result + getPaddingTop() + getPaddingBottom();
}
private int measureWidth(int widthMeasureSpec) {
int mode = MeasureSpec.getMode(widthMeasureSpec);
int val = MeasureSpec.getSize(widthMeasureSpec);
int result = 0;
switch (mode) {
case MeasureSpec.EXACTLY:
result = val;
break;
case MeasureSpec.AT_MOST:
case MeasureSpec.UNSPECIFIED:
result = mTextWidth;
break;
}
result = mode == MeasureSpec.AT_MOST ? Math.min(result, val) : result;
return result + getPaddingLeft() + getPaddingRight();
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
Log.e("TAG","mTextStartX"+ mTextStartX);
// mTextStartX , mProgress * mTextWidth
// mTextStartX + , , r
// , , r , , mProgress ,
// drawOriginRight(canvas, r); drawChangeRight(canvas, r);
// r ... ,
int r = (int) (mProgress * mTextWidth + mTextStartX);
Log.e("TAG","mProgress * mTextWidth + mTextStartX"+ r);
// mDirection left
if (mDirection == DIRECTION_LEFT) {
drawChangeLeft(canvas, r);
drawOriginLeft(canvas, r);
} else {
// , ,
drawOriginRight(canvas, r);
drawChangeRight(canvas, r);
}
}
// save, restore ??
//
private void drawText(Canvas canvas, int color, int startX, int endX) {
mPaint.setColor(color);
canvas.save(Canvas.CLIP_SAVE_FLAG);
canvas.clipRect(startX, 0, endX, getMeasuredHeight()); //
canvas.drawText(mText, mTextStartX, getMeasuredHeight() / 2
+ mTextBound.height() / 2, mPaint);
canvas.restore();
}
/** * r , progress , * mTextStartX + mTextWidth , + * @param canvas * @param r */
private void drawChangeRight(Canvas canvas, int r) {
drawText(canvas, mTextChangeColor, (int) (mTextStartX + (1 - mProgress)
* mTextWidth), mTextStartX + mTextWidth);
}
private void drawOriginRight(Canvas canvas, int r) {
drawText(canvas, mTextOriginColor, mTextStartX,
(int) (mTextStartX + (1 - mProgress) * mTextWidth));
}
private void drawOriginLeft(Canvas canvas, int r) {
drawText(canvas, mTextOriginColor, (int) (mTextStartX + mProgress
* mTextWidth), mTextStartX + mTextWidth);
}
// mProgress 0 ,
// , progress 1,
// pager , progress 0- 1 1-0
private void drawChangeLeft(Canvas canvas, int r) {
drawText(canvas, mTextChangeColor, mTextStartX,
(int) (mTextStartX + mProgress * mTextWidth));
}
// progress
public void setProgress(float progress) {
this.mProgress = progress;
invalidate();
}
private static final String KEY_STATE_PROGRESS = "key_progress";
private static final String KEY_DEFAULT_STATE = "key_default_state";
@Override
protected Parcelable onSaveInstanceState() {
Bundle bundle = new Bundle();
bundle.putFloat(KEY_STATE_PROGRESS, mProgress);
bundle.putParcelable(KEY_DEFAULT_STATE, super.onSaveInstanceState());
return bundle;
}
@Override
protected void onRestoreInstanceState(Parcelable state) {
if (state instanceof Bundle) {
Bundle bundle = (Bundle) state;
mProgress = bundle.getFloat(KEY_STATE_PROGRESS);
super.onRestoreInstanceState(bundle
.getParcelable(KEY_DEFAULT_STATE));
return;
}
super.onRestoreInstanceState(state);
}
}//Activity 테스트
public class MainActivity extends FragmentActivity {
private String[] mTitles = new String[] { " ", " ", " " };
private ViewPager mViewPager;
private FragmentPagerAdapter mAdapter;
private TabFragment[] mFragments = new TabFragment[mTitles.length];
private List<ColorTrackView> mTabs = new ArrayList<ColorTrackView>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initViews();
initDatas();
initEvents();
}
private void initViews() {
mViewPager = (ViewPager) findViewById(R.id.id_viewpager);
mTabs.add((ColorTrackView) findViewById(R.id.id_tab_01));
mTabs.add((ColorTrackView) findViewById(R.id.id_tab_02));
mTabs.add((ColorTrackView) findViewById(R.id.id_tab_03));
}
private void initDatas() {
for (int i = 0; i < mTitles.length; i++) {
mFragments[i] = TabFragment.newInstance(mTitles[i]);
}
mAdapter = new FragmentPagerAdapter(getSupportFragmentManager()) {
@Override
public int getCount() {
return mTitles.length;
}
@Override
public Fragment getItem(int position) {
return mFragments[position];
}
};
mViewPager.setAdapter(mAdapter);
mViewPager.setCurrentItem(0);
}
private void initEvents() {
mViewPager.addOnPageChangeListener(new OnPageChangeListener() {
@Override
public void onPageScrollStateChanged(int arg0) {
}
@Override
public void onPageScrolled(int position, float positionOffset,
int positionOffsetPixels) {
/** * positionOffset > 0 , , , * position positionOffset 0 , mTabs.get(position + 1) , * postion , * positionOffset 0, */
if (positionOffset > 0) {
ColorTrackView left = mTabs.get(position);
ColorTrackView right = mTabs.get(position + 1);
left.setDirection(1);
right.setDirection(0);
Log.e("TAG",position +"---"+ positionOffset + "");
/*** * positionOffset 0-1 * positionOffset 1-0 */
left.setProgress(1 - positionOffset); // -> progress 1-0 ,
right.setProgress(positionOffset); // -> progress 0-1 ,
}
}
@Override
public void onPageSelected(int arg0) {
}
});
}
}//ViewPager 를 구성 하 는 Fragment
public class TabFragment extends Fragment {
public static final String TITLE = "title";
private String mTitle = "Default Title";
/** * Activity */
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if(getArguments() != null){
mTitle = getArguments().getString(TITLE);
}
}
/** * Fragment , view */
@Override
@Nullable
public View onCreateView(LayoutInflater inflater,
@Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
// TextView , ,
TextView tv = new TextView(getActivity());
tv.setTextSize(60);
Random r = new Random();
tv.setBackgroundColor(Color.argb(r.nextInt(120), r.nextInt(255), r.nextInt(255), r.nextInt(255)));
tv.setText(mTitle);
tv.setGravity(Gravity.CENTER);
return tv;
}
public static TabFragment newInstance(String title) {
TabFragment tabFragment = new TabFragment();
Bundle bundle = new Bundle();
bundle.putString(TITLE, title);
tabFragment.setArguments(bundle);
return tabFragment;
}
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