Android--自定义控件（组合系统控件）

通过对系统提供的控件进行组合，不用写新的类不用继承系统的控件也能实现自定义控件的效果。下面是一个简单的例子：

效果图：

主函数：

import android.os.Bundle; import android.app.Activity; import android.util.Log; import android.view.KeyEvent; import android.view.Menu; import android.view.View; import android.view.View.OnClickListener; import android.widget.ImageView; import android.widget.RelativeLayout; public class MainActivity extends Activity implements OnClickListener{ private String tag = MainActivity.class.getSimpleName(); private ImageView iv_home,iv_menu; private RelativeLayout level1,level2,level3; private boolean isShowLevel2 = true;//是否显示2级菜单 private boolean isShowLevel3 = true;//是否显示3级菜单 private boolean isShowMenu = true;//是否显示整个菜单，包括1级，2级，3级的菜单 @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); initView(); initListener(); } private void initView() { setContentView(R.layout.activity_main); iv_home = (ImageView) findViewById(R.id.iv_home); iv_menu = (ImageView) findViewById(R.id.iv_menu); level1 = (RelativeLayout) findViewById(R.id.level1); level2 = (RelativeLayout) findViewById(R.id.level2); level3 = (RelativeLayout) findViewById(R.id.level3); } private void initListener() { iv_home.setOnClickListener(this); iv_menu.setOnClickListener(this); } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if(keyCode==KeyEvent.KEYCODE_MENU){ if(isShowMenu){ //需要关闭所有菜单 int startOffset = 0; if(isShowLevel3){ AnimUtil.closeMenu(level3, startOffset); isShowLevel3 = false; startOffset += 200; } if(isShowLevel2){ AnimUtil.closeMenu(level2, startOffset); isShowLevel2 = false; startOffset += 200; } AnimUtil.closeMenu(level1, startOffset); }else { //需要显示所有菜单 AnimUtil.showMenu(level1,0); AnimUtil.showMenu(level2,200); isShowLevel2 = true; AnimUtil.showMenu(level3,400); isShowLevel3 = true; } isShowMenu = !isShowMenu; return true; } return super.onKeyDown(keyCode, event); } @Override public void onClick(View v) { switch (v.getId()) { case R.id.iv_home: if(AnimUtil.animCount!=0){ //说明有动画在执行 return; } if(isShowLevel2){ //需要隐藏 int startOffset = 0; if(isShowLevel3){ AnimUtil.closeMenu(level3,startOffset); startOffset += 200; isShowLevel3 = false; } AnimUtil.closeMenu(level2,startOffset); }else{ //需要显示 // Log.e(tag, "执行显示操作"); AnimUtil.showMenu(level2,0); } isShowLevel2 = !isShowLevel2; break; case R.id.iv_menu: if(AnimUtil.animCount!=0){ //说明有动画在执行 return; } if(isShowLevel3){ //隐藏3级菜单 AnimUtil.closeMenu(level3,0); }else { //显示3级菜单 AnimUtil.showMenu(level3,0); } isShowLevel3 = !isShowLevel3; break; default: break; } } }

import android.view.animation.Animation; import android.view.animation.Animation.AnimationListener; import android.view.animation.RotateAnimation; import android.widget.RelativeLayout; public class AnimUtil { public static int animCount = 0;//记录当前执行的动画数量 public static void closeMenu(RelativeLayout rl,int startOffset){ for (int i = 0; i < rl.getChildCount(); i++) { rl.getChildAt(i).setEnabled(false); } //pivotXValue: 0-1 RotateAnimation animation = new RotateAnimation(0, -180, RotateAnimation.RELATIVE_TO_SELF, 0.5f, RotateAnimation.RELATIVE_TO_SELF, 1); animation.setDuration(500); animation.setFillAfter(true);//动画结束后保持当时的状态 animation.setStartOffset(startOffset); animation.setAnimationListener(new MyAnimationListener()); rl.startAnimation(animation); } public static void showMenu(RelativeLayout rl,int startOffset){ for (int i = 0; i < rl.getChildCount(); i++) { rl.getChildAt(i).setEnabled(true); } RotateAnimation animation = new RotateAnimation(-180, 0, RotateAnimation.RELATIVE_TO_SELF, 0.5f, RotateAnimation.RELATIVE_TO_SELF, 1); animation.setDuration(500); animation.setFillAfter(true);//动画结束后保持当时的状态 animation.setStartOffset(startOffset); animation.setAnimationListener(new MyAnimationListener()); rl.startAnimation(animation); } static class MyAnimationListener implements AnimationListener{ @Override public void onAnimationStart(Animation animation) { animCount++; } @Override public void onAnimationEnd(Animation animation) { animCount--; } @Override public void onAnimationRepeat(Animation animation) { } } } 

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" > <!-- 一级菜单 --> <RelativeLayout android:layout_width="100dp" android:background="@drawable/level1" android:layout_alignParentBottom="true" android:id="@+id/level1" android:layout_centerHorizontal="true" android:layout_height="50dp"> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:id="@+id/iv_home" android:background="@drawable/icon_home"/> </RelativeLayout> <!-- 二级菜单 --> <RelativeLayout android:layout_width="180dp" android:layout_height="90dp" android:id="@+id/level2" android:layout_alignParentBottom="true" android:layout_centerHorizontal="true" android:background="@drawable/level2"> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_marginBottom="10dp" android:layout_marginLeft="10dp" android:background="@drawable/icon_search"/> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_alignParentRight="true" android:layout_marginBottom="10dp" android:layout_marginRight="10dp" android:background="@drawable/icon_myyouku"/> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="5dp" android:id="@+id/iv_menu" android:background="@drawable/icon_menu" android:layout_centerHorizontal="true"/> </RelativeLayout> <RelativeLayout android:layout_width="280dp" android:layout_height="142dp" android:id="@+id/level3" android:layout_alignParentBottom="true" android:layout_centerHorizontal="true" android:background="@drawable/level3"> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_marginBottom="15dp" android:layout_marginLeft="12dp" android:background="@drawable/channel1" /> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_marginBottom="15dp" android:layout_alignParentRight="true" android:layout_marginRight="12dp" android:background="@drawable/channel5" /> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_marginBottom="55dp" android:layout_marginLeft="32dp" android:background="@drawable/channel2" /> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_alignParentRight="true" android:layout_marginBottom="55dp" android:layout_marginRight="32dp" android:background="@drawable/channel6" /> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_marginBottom="85dp" android:layout_marginLeft="62dp" android:background="@drawable/channel3" /> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_alignParentBottom="true" android:layout_marginBottom="85dp" android:background="@drawable/channel7" android:layout_marginRight="62dp" /> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="5dp" android:layout_centerHorizontal="true" android:background="@drawable/channel4"/> </RelativeLayout> </RelativeLayout>