package org.aisen.weibo.sina.ui.widget;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.support.design.widget.AppBarLayout;
import android.support.design.widget.CollapsingToolbarLayout;
import android.support.design.widget.TabLayout;
import android.support.v7.widget.Toolbar;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewParent;
import android.widget.ImageView;
import org.aisen.android.common.utils.BitmapUtil;
import org.aisen.android.common.utils.Utils;
import org.aisen.weibo.sina.R;
/**
* Created by wangdan on 16/2/4.
*/
public class ProfileCollapsingToolbarLayout extends CollapsingToolbarLayout {
public static final String TAG = ProfileCollapsingToolbarLayout.class.getSimpleName();
private ImageView imgCover;
private Toolbar toolbar;
private TabLayout tabLayout;
private AppBarLayout appBarLayout;
private CollapsingToolbarLayout collapsingToolbarLayout;
private View layDetail;
private View layRealDetail;
private View layName;
private int statusbarHeight;
private boolean scrimsShown;
private Drawable mInsetForeground;
private Rect mTempRect = new Rect();
private int verticalOffset;
private boolean onCoverSet = false;
private int appbarHeight;
private int coverHeight;// 封面高度
private int avatarSize;// 头像尺寸
private int finalAvatarSize;// 缩小后的头像尺寸
private int avatarMarginLeft;// 头像左侧Margin
private int avatarFinalMarginLeft;// 头像缩小后的Margin
private Bitmap avatarBitmap;// 头像位图
private Matrix avatarMatrix;// 头像矩阵
private Bitmap layNameBitmap;// 包括名字、性别、认证三个要素的截图
private Matrix layNameMatrix;
private int layNameMarginTop;// 名字顶部的margin
private int layNameMarginLeft;
private int finalLayNameSize;
private float maxVerticalOffset;// Collapsing最大距离
public ProfileCollapsingToolbarLayout(Context context, AttributeSet attrs) {
super(context, attrs);
setup(context, attrs, 0);
}
public ProfileCollapsingToolbarLayout(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
setup(context, attrs, defStyleAttr);
}
private void setup(Context context, AttributeSet attrs, int defStyle) {
statusbarHeight = getStatusBarHeight();
final TypedArray a = context.obtainStyledAttributes(attrs,
R.styleable.ProfileCollapsingToolbarLayout, defStyle, 0);
if (a == null) {
return;
}
mInsetForeground = a.getDrawable(R.styleable.ProfileCollapsingToolbarLayout_profileInsetForeground);
a.recycle();
coverHeight = getResources().getDimensionPixelSize(R.dimen.profile_cover);
avatarSize = Utils.dip2px(context, 100);
finalAvatarSize = Utils.dip2px(context, 36);
avatarFinalMarginLeft = Utils.dip2px(context, 16);
layNameMarginTop = Utils.dip2px(context, 32);
finalLayNameSize = Utils.dip2px(context, 28);
layNameMarginLeft = Utils.dip2px(context, 12);
avatarMarginLeft = getResources().getDimensionPixelSize(R.dimen.padding_normal);
Bitmap sourceBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.user_placeholder);
avatarBitmap = BitmapUtil.setImageCorner(sourceBitmap, sourceBitmap.getWidth());
}
private void maybeSetup() {
if (appBarLayout == null) {
return;
}
// 将Cover的高度重新Measure一次
if (!onCoverSet && appBarLayout.getHeight() > 0) {
onCoverSet = true;
CollapsingToolbarLayout.LayoutParams lp = (CollapsingToolbarLayout.LayoutParams) imgCover.getLayoutParams();
lp.height = layDetail.getHeight() + coverHeight;
imgCover.setLayoutParams(lp);
imgCover.setPadding(imgCover.getPaddingLeft(), imgCover.getPaddingTop(), imgCover.getPaddingRight(), layDetail.getHeight());
}
if (appbarHeight != appBarLayout.getHeight()) {
appbarHeight = appBarLayout.getHeight();
// 计算Detail的layout_collapseParallaxMultiplier，使其收起来时刚好高度为ToolBar的高度
CollapsingToolbarLayout.LayoutParams params = (CollapsingToolbarLayout.LayoutParams) layDetail.getLayoutParams();
// 最大移动的距离
maxVerticalOffset = appBarLayout.getHeight() - (statusbarHeight + toolbar.getHeight() + tabLayout.getHeight()) - 2;
// 计算移动后的top减去移动前的top就是需要offset，再用offset计算出multiplier
float multiplier = ((maxVerticalOffset + statusbarHeight) -
(collapsingToolbarLayout.getHeight() - layDetail.getHeight())) * 1.0f / maxVerticalOffset;
if (params.getParallaxMultiplier() != multiplier) {
params.setParallaxMultiplier(multiplier);
}
avatarMatrix = new Matrix();
setNameBitmap();
}
}
private void setNameBitmap() {
if (layName == null)
return;
layNameBitmap = Bitmap.createBitmap(layName.getWidth(), layName.getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(layNameBitmap);
layName.draw(canvas);
layName.setVisibility(View.INVISIBLE);
layNameMatrix = new Matrix();
}
public void resetNameBitmap() {
layName.setVisibility(View.VISIBLE);
onCoverSet = false;
layNameBitmap = null;
}
public void setAvatarBitmap(Bitmap bitmap) {
avatarBitmap = BitmapUtil.setImageCorner(bitmap, bitmap.getWidth());
innerOffsetChangedListener.onOffsetChanged(appBarLayout, verticalOffset);
invalidate();
}
@Override
public void setScrimsShown(boolean shown, boolean animate) {
super.setScrimsShown(shown, animate);
scrimsShown = shown;
}
private boolean isScrimsShown() {
return scrimsShown;
}
@Override
public void draw(Canvas canvas) {
super.draw(canvas);
if (avatarMatrix != null) {
final int saveCount = canvas.save();
if (!isScrimsShown()) {
mTempRect.set(0, -verticalOffset, getWidth(), statusbarHeight + -verticalOffset);
mInsetForeground.setBounds(mTempRect);
mInsetForeground.draw(canvas);
}
if (layNameBitmap != null) {
canvas.drawBitmap(layNameBitmap, layNameMatrix, null);
}
canvas.drawBitmap(avatarBitmap, avatarMatrix, null);
canvas.restoreToCount(saveCount);
}
}
@Override
protected void onAttachedToWindow() {
super.onAttachedToWindow();
// Add an OnOffsetChangedListener if possible
final ViewParent parent = getParent();
if (parent instanceof AppBarLayout) {
((AppBarLayout) parent).addOnOffsetChangedListener(innerOffsetChangedListener);
layDetail = findViewById(R.id.layDetail);
layRealDetail = findViewById(R.id.layRealDetail);
toolbar = (Toolbar) findViewById(R.id.toolbar);
appBarLayout = (AppBarLayout) parent;
collapsingToolbarLayout = this;
imgCover = (ImageView) findViewById(R.id.imgCover);
tabLayout = (TabLayout) appBarLayout.findViewById(R.id.tabLayout);
layName = findViewById(R.id.layName);
}
}
@Override
protected void onDetachedFromWindow() {
// Remove our OnOffsetChangedListener if possible and it exists
final ViewParent parent = getParent();
if (parent instanceof AppBarLayout) {
((AppBarLayout) parent).removeOnOffsetChangedListener(innerOffsetChangedListener);
}
super.onDetachedFromWindow();
}
private AppBarLayout.OnOffsetChangedListener innerOffsetChangedListener = new AppBarLayout.OnOffsetChangedListener() {
@Override
public void onOffsetChanged(AppBarLayout appBarLayout, int verticalOffset) {
maybeSetup();
if (layNameBitmap == null) {
setNameBitmap();
}
ProfileCollapsingToolbarLayout.this.verticalOffset = verticalOffset;
// offset移动的比例
float factor = -verticalOffset * 1.0f / maxVerticalOffset;
if (avatarMatrix != null) {
// 从avatarSize变化到finalAvatarSize，是根据这个factor逐渐变化的，计算它的dsize变化值
float dsize = (avatarSize - finalAvatarSize) * factor;
// 计算现在需要显示的avatar尺寸
float avatarToSize = avatarSize - dsize;
// 缩放
float scale = avatarToSize * 1.0f / avatarBitmap.getWidth();
avatarMatrix.setScale(scale, scale);
// 初始化Top
float startAvatarTop = getHeight() - layDetail.getHeight() - avatarToSize * 3.0f / 4;
// 最终显示的Top
float toAvatartTop = maxVerticalOffset + statusbarHeight + (toolbar.getHeight() - finalAvatarSize) * 1.0f / 2;
float avatarTop = startAvatarTop - (startAvatarTop - toAvatartTop) * factor;
// 初始化MarginLeft
float startMargin = avatarMarginLeft;
float toMargin = avatarFinalMarginLeft;
float margin = startMargin - (startMargin - toMargin) * factor;
// 平移
avatarMatrix.postTranslate(margin, avatarTop);
}
if (layNameMatrix != null) {
float dsize = (layNameBitmap.getHeight() - finalLayNameSize) * factor;
float nameToSize = layNameBitmap.getHeight() - dsize;
float scale = nameToSize * 1.0f / layNameBitmap.getHeight();
layNameMatrix.setScale(scale, scale);
float startNameTop = getHeight() - layDetail.getHeight() + layNameMarginTop;
float toNameTop = maxVerticalOffset + statusbarHeight + (toolbar.getHeight() - finalLayNameSize) * 1.0f / 2;
float nameTop = startNameTop - (startNameTop - toNameTop) * factor;
float startMargin = avatarMarginLeft;
float toMargin = avatarFinalMarginLeft + finalAvatarSize + layNameMarginLeft;
float margin = startMargin - (startMargin - toMargin) * factor;
layNameMatrix.postTranslate(margin, nameTop);
}
if (layRealDetail != null) {
layRealDetail.setAlpha(1.0f - factor * 0.7f);
}
}
};
public int getStatusBarHeight() {
int result = 0;
int resourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
if (resourceId > 0) {
result = getResources().getDimensionPixelSize(resourceId);
}
return result;
}
}