package?com.jiang.cn;


import?android.content.Context;
import?android.content.res.TypedArray;
import?android.util.AttributeSet;
import?android.view.View;
import?android.view.ViewConfiguration;
import?android.view.ViewGroup;
import?android.widget.ImageButton;
import?android.widget.Scroller;

/**
?*?自定義View，模仿android?桌面Luncher
?*/
public?class?BigDragableLuncher?extends?ViewGroup?{

	//?按鈕背景色
	int?choseColor?defaultColor;
	//?底部按鈕數組
	ImageButton[]?bottomBar;
	//?負責得到滾動屬性的對象
	private?Scroller?mScroller;
	//?滾動的起始X坐標
	private?int?mScrollX?=?0;
	//?默認顯示第幾屏
	private?int?mCurrentScreen?=?0;

	public?int?mTouchSlop?=?0;

	public?BigDragableLuncher（Context?context）?{
		super（context）;
		mScroller?=?new?Scroller（context）;
		//?得到狀態位
		mTouchSlop?=?ViewConfiguration.get（getContext（））.getScaledTouchSlop（）;
		//設置布局參數
		this.setLayoutParams（new?ViewGroup.LayoutParams（
				ViewGroup.LayoutParams.WRAP_CONTENT
				ViewGroup.LayoutParams.FILL_PARENT））;
	}

	public?BigDragableLuncher（Context?context?AttributeSet?attrs）?{
		super（context?attrs）;
		mScroller?=?new?Scroller（context）;

		mTouchSlop?=?ViewConfiguration.get（getContext（））.getScaledTouchSlop（）;
		//設置布局參數
		this.setLayoutParams（new?ViewGroup.LayoutParams（
				ViewGroup.LayoutParams.WRAP_CONTENT
				ViewGroup.LayoutParams.FILL_PARENT））;

		TypedArray?a?=?getContext（）.obtainstyledAttributes（attrs
				R.styleable.DragableLuncher）;
		mCurrentScreen?=?a.getInteger（
				R.styleable.DragableLuncher_default_screen?0）;
	}
	//設置底部按鈕顏色
	public?void?setBottomBarBg（ImageButton[]?ib?int?choseColor
			int?defaultColor）?{
		this.bottomBar?=?ib;
		this.choseColor?=?choseColor;
		this.defaultColor?=?defaultColor;
	}
	//屏幕滾動
	public?void?snapToDestination（）?{
		final?int?screenWidth?=?getWidth（）;
		//滑動距離超過1/2屏幕時，進入下一個界面
		final?int?whichScreen?=?（mScrollX?+?（screenWidth?/?2））?/?screenWidth;
		snapToScreen（whichScreen）;
	}

	/**
	?*?帶動畫效果顯示界面
	?*/
	public?void?snapToScreen（int?whichScreen）?{
		mCurrentScreen?=?whichScreen;
		final?int?newX?=?whichScreen?*?getWidth（）;
		final?int?delta?=?newX?-?mScrollX;
		mScroller.startScroll（mScrollX?0?delta?0?Math.abs（delta）?*?2）;
		invalidate（）;
	}

	/**
	?*?不帶動畫效果顯示界面
	?*/
	public?void?setToScreen（int?whichScreen）?{
		mCurrentScreen?=?whichScreen;
		final?int?newX?=?whichScreen?*?getWidth（）;
		mScroller.startScroll（newX?0?0?0?10）;
		invalidate（）;
	}
	//取得當前屏幕位置
	public?int?getCurrentScreen（）?{
		return?mCurrentScreen;
	}
	//改變布局時調用
	@Override
	protected?void?onLayout（boolean?changed?int?l?int?t?int?r?int?b）?{
		int?childLeft?=?0;

		final?int?count?=?getChildCount（）;
		for?（int?i?=?0;?i?			final?View?child?=?getChildAt（i）;
			//從左到右依次排列子元素
			if?（child.getVisibility（）?!=?View.GONE）?{
				final?int?childWidth?=?child.getMeasuredWidth（）;
				child.layout（childLeft?0?childLeft?+?childWidth
						child.getMeasuredHeight（））;
				childLeft?+=?ch

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件?????????352??2018-06-28?13:07??MyMusicPlayer1\build.gradle
?????目錄???????????0??2018-06-28?12:23??MyMusicPlayer1\gradle\
?????目錄???????????0??2018-06-28?13:11??MyMusicPlayer1\gradle\wrapper\
?????文件???????54708??2018-06-28?12:23??MyMusicPlayer1\gradle\wrapper\gradle-wrapper.jar
?????文件?????????232??2018-06-28?13:11??MyMusicPlayer1\gradle\wrapper\gradle-wrapper.properties
?????文件????????5296??2018-06-28?12:23??MyMusicPlayer1\gradlew
?????文件????????2260??2018-06-28?12:23??MyMusicPlayer1\gradlew.bat
?????文件????????1274??2018-06-28?12:23??MyMusicPlayer1\import-summary.txt
?????目錄???????????0??2018-06-28?13:15??MyMusicPlayer1\MyMusicPlayer\
?????文件?????????592??2018-06-28?13:15??MyMusicPlayer1\MyMusicPlayer\build.gradle
?????目錄???????????0??2018-06-28?12:23??MyMusicPlayer1\MyMusicPlayer\src\
?????目錄???????????0??2018-06-28?12:23??MyMusicPlayer1\MyMusicPlayer\src\main\
?????文件????????1430??2018-06-28?12:23??MyMusicPlayer1\MyMusicPlayer\src\main\AndroidManifest.xml
?????目錄???????????0??2018-06-28?12:23??MyMusicPlayer1\MyMusicPlayer\src\main\java\
?????目錄???????????0??2018-06-28?12:23??MyMusicPlayer1\MyMusicPlayer\src\main\java\com\
?????目錄???????????0??2018-06-28?12:23??MyMusicPlayer1\MyMusicPlayer\src\main\java\com\jiang\
?????目錄???????????0??2018-06-28?13:59??MyMusicPlayer1\MyMusicPlayer\src\main\java\com\jiang\cn\
?????文件????????4310??2018-06-28?12:23??MyMusicPlayer1\MyMusicPlayer\src\main\java\com\jiang\cn\BigDragableLuncher.java
?????文件???????14793??2018-06-28?12:23??MyMusicPlayer1\MyMusicPlayer\src\main\java\com\jiang\cn\ControlPlay.java
?????文件????????8824??2018-06-28?12:23??MyMusicPlayer1\MyMusicPlayer\src\main\java\com\jiang\cn\DragableLuncher.java
?????文件?????????617??2018-06-28?12:23??MyMusicPlayer1\MyMusicPlayer\src\main\java\com\jiang\cn\jiemian.java
?????文件????????3194??2018-06-28?12:23??MyMusicPlayer1\MyMusicPlayer\src\main\java\com\jiang\cn\LrcProcess.java
?????文件????????3668??2018-06-28?13:21??MyMusicPlayer1\MyMusicPlayer\src\main\java\com\jiang\cn\LrcView.java
?????文件?????????597??2018-06-28?12:23??MyMusicPlayer1\MyMusicPlayer\src\main\java\com\jiang\cn\MusicListView.java
?????文件???????25247??2018-06-28?13:59??MyMusicPlayer1\MyMusicPlayer\src\main\java\com\jiang\cn\MusicPlayerActivity.java
?????文件????????2749??2018-06-28?12:23??MyMusicPlayer1\MyMusicPlayer\src\main\java\com\jiang\cn\MusicSpecialView.java
?????文件????????7375??2018-06-28?13:59??MyMusicPlayer1\MyMusicPlayer\src\main\java\com\jiang\cn\Music_infoAdapter.java
?????文件????????1592??2018-06-28?12:23??MyMusicPlayer1\MyMusicPlayer\src\main\java\com\jiang\cn\RunGif.java
?????目錄???????????0??2018-06-28?12:23??MyMusicPlayer1\MyMusicPlayer\src\main\res\
?????目錄???????????0??2018-06-28?12:23??MyMusicPlayer1\MyMusicPlayer\src\main\res\anim\
?????文件?????????280??2018-06-28?12:23??MyMusicPlayer1\MyMusicPlayer\src\main\res\anim\alpha_x.xml
............此處省略87個文件信息