PopMenu效果的学习

看到很多的程序里面都用了PopMenu的效果，给人的体验非常好，今天也学着做了一个，效果如下：

PopMenu.java

public class PopMenu extends Activity {private int SCREEN_WIDTH;private int SCREEN_HEIGHT;private final static int MENU_CREATE_DIRECTORY = 0;private final static int MENU_CREATE_FILE = 1;private final static int MENU_PASTE = 2;public final static int MENU_SEARCH = 3;private final static int MENU_SHOW_COPY_DIALOG = 4;private final static int MENU_APK_MANAGER = 5;private final static int MENU_SETTING = 6;private final static int MENU_SET_VIEW_STYLE = 7;private final static int MENU_FILE_LIB = 8;private final static int MENU_FINISH_ACTIVITY = 9;private LinearLayout appMenu;private Animation menuShowAnimation;private Animation menuHideAnimation;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);SCREEN_WIDTH = getResources().getDisplayMetrics().widthPixels;SCREEN_HEIGHT = getResources().getDisplayMetrics().heightPixels;initAppMenu();}private void initAppMenu() {appMenu = (LinearLayout) findViewById(R.id.appMenu);LinearLayout row = (LinearLayout) appMenu.findViewById(R.id.appRow1);int[] drRes = { R.drawable.newfolder, R.drawable.newfile,R.drawable.paste, R.drawable.search, R.drawable.dialog,R.drawable.apkmanager, R.drawable.setting, R.drawable.multicon,R.drawable.filelib, R.drawable.close };String[] names = getResources().getStringArray(R.array.appnames);LayoutInflater inflater = getLayoutInflater();View.OnClickListener listener = new View.OnClickListener() {@Overridepublic void onClick(View v) {appMenuOnClick(v.getId());hideAppMenu();}};for (int i = 0; i < 10; i++) {if (i == 5) {row = (LinearLayout) appMenu.findViewById(R.id.appRow2);}RelativeLayout rowItem = (RelativeLayout) inflater.inflate(R.layout.appmenuitem, null);ImageButton icon = (ImageButton) rowItem.findViewById(R.id.menuicon);TextView name = (TextView) rowItem.findViewById(R.id.menuname);icon.setBackgroundResource(drRes[i]);icon.setId(i);name.setText(names[i]);icon.setOnClickListener(listener);row.addView(rowItem);}}private void appMenuOnClick(int whitch) {switch (whitch) {case MENU_CREATE_DIRECTORY:Toast.makeText(this, "Create Directory", Toast.LENGTH_LONG).show();break;case MENU_CREATE_FILE:Toast.makeText(this, "Create File", Toast.LENGTH_LONG).show();break;case MENU_PASTE:Toast.makeText(this, "Paste", Toast.LENGTH_LONG).show();break;case MENU_SEARCH:Toast.makeText(this, "Search", Toast.LENGTH_LONG).show();break;case MENU_FINISH_ACTIVITY:Toast.makeText(this, "Finish Activity", Toast.LENGTH_LONG).show();break;case MENU_SHOW_COPY_DIALOG:Toast.makeText(this, "Show Copy Dialog", Toast.LENGTH_LONG).show();break;case MENU_SETTING:Toast.makeText(this, "Setting", Toast.LENGTH_LONG).show();break;case MENU_SET_VIEW_STYLE:Toast.makeText(this, "Set View Style", Toast.LENGTH_LONG).show();break;default:break;}}@Overridepublic boolean dispatchKeyEvent(KeyEvent event) {int actiton = event.getAction();int code = event.getKeyCode();switch (code) {case KeyEvent.KEYCODE_MENU:if (actiton == KeyEvent.ACTION_DOWN) {if (appMenu.getVisibility() == View.INVISIBLE) {showAppMenu();} else {hideAppMenu();}}break;case KeyEvent.KEYCODE_BACK:if (appMenu.getVisibility() == View.INVISIBLE) {hideAppMenu();}break;default:break;}return super.dispatchKeyEvent(event);}@Overridepublic boolean dispatchTouchEvent(MotionEvent event) {if (appMenu.getVisibility() == View.VISIBLE) {int y = (int) event.getRawY();if (y < SCREEN_HEIGHT - appMenu.getHeight()) {hideAppMenu();return true;}}return super.dispatchTouchEvent(event);}private void hideAppMenu() {appMenu.setVisibility(View.INVISIBLE);if (menuHideAnimation == null) {menuHideAnimation = AnimationUtils.loadAnimation(this,R.anim.menuhide);}appMenu.startAnimation(menuHideAnimation);}private void showAppMenu() {appMenu.setVisibility(View.VISIBLE);if (menuShowAnimation == null) {menuShowAnimation = AnimationUtils.loadAnimation(this,R.anim.menushow);}appMenu.startAnimation(menuShowAnimation);}} 

res/anim中对于动画的控制：

menuhide.xml:

<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android"><translateandroid:fromXDelta="0"android:toXDelta="0"android:fromYDelta="120"android:toYDelta="00"android:duration="200" /></set> 

menushow.xml:

<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android"><translateandroid:fromXDelta="0"android:toXDelta="0"android:fromYDelta="00"android:toYDelta="120"android:duration="200" /></set> 

layout/main.xml:

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical" android:layout_width="fill_parent"android:layout_height="fill_parent"><TextView android:layout_width="fill_parent"android:layout_height="wrap_content" android:text="@string/hello" /><LinearLayout android:id="@+id/appMenu" android:layout_gravity="bottom"android:orientation="vertical" android:layout_width="fill_parent"android:layout_height="125dip" android:visibility="visible"android:background="@drawable/menubackground" android:layout_alignParentBottom="true"><LinearLayout android:id="@+id/appRow1"android:orientation="horizontal" android:gravity="center_horizontal"android:layout_gravity="center_horizontal" android:padding="2dip"android:layout_width="fill_parent" android:layout_height="60dip"></LinearLayout><LinearLayout android:id="@+id/appRow2"android:orientation="horizontal" android:gravity="center_horizontal"android:layout_gravity="center_horizontal" android:padding="2dip"android:layout_width="fill_parent" android:layout_height="60dip"></LinearLayout></LinearLayout></RelativeLayout> 

layout/appmenuitem.xml:

<?xml version="1.0" encoding="utf-8"?><RelativeLayoutxmlns:android="http://schemas.android.com/apk/res/android" android:layout_height="60dp"android:layout_width="60dp"android:gravity="center_horizontal"><ImageButton android:id="@+id/menuicon"android:layout_height="60dp" android:layout_width="60dp"android:gravity="center_horizontal" android:layout_alignParentBottom="true" /><TextView android:id="@+id/menuname"android:layout_height="60dp"android:layout_width="60dp" android:singleLine="true"android:textSize="12dp" android:textColor="#ff000000"android:paddingTop="40dp" android:gravity="center_horizontal"android:layout_alignParentBottom="true" /></RelativeLayout> 

values/strings.xml:

<?xml version="1.0" encoding="utf-8"?><resources><string name="hello">Hello World, PopMenu!</string><string name="app_name">PopMenu</string><string-array name="appnames"><item>新建文件夹</item><item>新建文件</item><item>粘贴</item><item>搜索</item><item>复制对话框</item><item>APK管理</item><item>设置</item><item>图标</item><item>文件库</item><item>退出</item></string-array></resources> 

做完这个感觉很多的动画效果都是“假的”，是做出来的一种效果。