一.扇形菜单的实现：
借鉴了大神们的源码，那我们来看一下扇形菜单是怎么实现的：
效果图：
主界面布局：
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/background">
<!--
android:clipChildren的意思：是否限制子View在其范围内
android:clipToPadding就是说控件的绘制区域是否在padding里面的
-->
<RelativeLayout
android:id="@+id/buttons_wrapper_layout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:clipChildren="false"
android:clipToPadding="false" >
<ImageButton
android:id="@+id/button_photo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_marginBottom="142dp"
android:layout_marginRight="10dp"
android:background="@drawable/path2_composer_camera"
android:visibility="gone" />
<ImageButton
android:id="@+id/button_people"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_marginBottom="135dp"
android:layout_marginRight="52dp"
android:background="@drawable/path2_composer_with"
android:visibility="gone" />
<ImageButton
android:id="@+id/button_place"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_marginBottom="116dp"
android:layout_marginRight="89dp"
android:background="@drawable/path2_composer_place"
android:visibility="gone" />
<ImageButton
android:id="@+id/button_music"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_marginBottom="87dp"
android:layout_marginRight="118dp"
android:background="@drawable/path2_composer_music"
android:visibility="gone" />
<ImageButton
android:id="@+id/button_thought"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_marginBottom="50dp"
android:layout_marginRight="137dp"
android:background="@drawable/path2_composer_thought"
android:visibility="gone" />
<ImageButton
android:id="@+id/button_sleep"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_marginBottom="8dp"
android:layout_marginRight="144dp"
android:background="@drawable/path2_composer_sleep"
android:visibility="gone" />
</RelativeLayout>
<RelativeLayout
android:id="@+id/buttons_show_hide_button_layout"
android:layout_width="60dp"
android:layout_height="57dp"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:background="@drawable/path2_composer_button" >
<ImageView
android:id="@+id/buttons_show_hide_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:src="@drawable/path2_composer_icn_plus" />
</RelativeLayout>
</RelativeLayout>Activity：
public class MainActivity extends Activity {
private boolean isShowing;
private RelativeLayout buttons_wrapper_layout;
private ImageView buttons_show_hide_button;
private RelativeLayout buttons_show_hide_button_layout;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.sector_menu);
MyAnimations.initOffset(MainActivity.this);
buttons_wrapper_layout = (RelativeLayout) findViewById(R.id.buttons_wrapper_layout);
buttons_show_hide_button_layout = (RelativeLayout) findViewById(R.id.buttons_show_hide_button_layout);
buttons_show_hide_button = (ImageView) findViewById(R.id.buttons_show_hide_button);
buttons_show_hide_button_layout.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (!isShowing) {
MyAnimations.startAnimationsIn(buttons_wrapper_layout, 300);
buttons_show_hide_button
.startAnimation(MyAnimations.getRotateAnimation(0,
-270, 300));
} else {
MyAnimations
.startAnimationsOut(buttons_wrapper_layout, 300);
buttons_show_hide_button
.startAnimation(MyAnimations.getRotateAnimation(
-270, 0, 300));
}
isShowing = !isShowing;
}
});
for (int i = 0; i < buttons_wrapper_layout.getChildCount(); i++) {
buttons_wrapper_layout.getChildAt(i).setOnClickListener(new OnClickImageButton());
}
}
class OnClickImageButton implements View.OnClickListener{
@Override
public void onClick(View arg0) {
switch(arg0.getId()){
case R.id.button_photo:
Toast.makeText(MainActivity.this, "photo", Toast.LENGTH_SHORT).show();
break;
case R.id.button_people:
Toast.makeText(MainActivity.this, "people", Toast.LENGTH_SHORT).show();
break;
case R.id.button_place:
Toast.makeText(MainActivity.this, "place", Toast.LENGTH_SHORT).show();
break;
case R.id.button_music:
Toast.makeText(MainActivity.this, "music", Toast.LENGTH_SHORT).show();
break;
case R.id.button_thought:
Toast.makeText(MainActivity.this, "thought", Toast.LENGTH_SHORT).show();
break;
case R.id.button_sleep:
Toast.makeText(MainActivity.this, "sleep", Toast.LENGTH_SHORT).show();
break;
}
}
}
}
动画实现：
public class MyAnimations {
private static int xOffset = 15;
private static int yOffset = -13;
public static void initOffset(Context context) {
//获取屏幕的密度 context.getResources().getDisplayMetrics().density 设置移动的距离
xOffset = (int) (10 * context.getResources().getDisplayMetrics().density);
yOffset = -(int) (8 * context.getResources().getDisplayMetrics().density);
}
public static Animation getRotateAnimation(float fromDegrees,
float toDegrees, int durationMillis) {
//旋转，前两个参数设置旋转角度，后四个设置旋转中心
RotateAnimation rotate = new RotateAnimation(fromDegrees, toDegrees,
Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,
0.5f);
//持续时间
rotate.setDuration(durationMillis);
//动画结束后，停留在最后一秒
rotate.setFillAfter(true);
return rotate;
}
public static void startAnimationsIn(ViewGroup viewgroup, int durationMillis) {
for (int i = 0; i < viewgroup.getChildCount(); i++) {
ImageButton inoutimagebutton = (ImageButton) viewgroup
.getChildAt(i);
//显示图片
inoutimagebutton.setVisibility(View.VISIBLE);
MarginLayoutParams mlp = (MarginLayoutParams) inoutimagebutton
.getLayoutParams();
//位移距离
Animation animation = new TranslateAnimation(mlp.rightMargin
- xOffset, 0F, yOffset + mlp.bottomMargin, 0F);
//动画结束后，停留在最后一帧
animation.setFillAfter(true);
//动画持续时间
animation.setDuration(durationMillis);
//启动时间
animation.setStartOffset((i * 100)
/ (-1 + viewgroup.getChildCount()));
animation.setInterpolator(new OvershootInterpolator(2F));
//加入动画
inoutimagebutton.startAnimation(animation);
}
}
public static void startAnimationsOut(ViewGroup viewgroup,
int durationMillis) {
for (int i = 0; i < viewgroup.getChildCount(); i++) {
final ImageButton inoutimagebutton = (ImageButton) viewgroup
.getChildAt(i);
MarginLayoutParams mlp = (MarginLayoutParams) inoutimagebutton
.getLayoutParams();
Animation animation = new TranslateAnimation(0F, mlp.rightMargin
- xOffset, 0F, yOffset + mlp.bottomMargin);
animation.setFillAfter(true);
animation.setDuration(durationMillis);
animation.setStartOffset(((viewgroup.getChildCount() - i) * 100)
/ (-1 + viewgroup.getChildCount()));
animation.setInterpolator(new AnticipateInterpolator(2F));
//设置动画监听
animation.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation arg0) {
}
@Override
public void onAnimationRepeat(Animation arg0) {
}
//动画结束后，隐藏imageButton
@Override
public void onAnimationEnd(Animation arg0) {
inoutimagebutton.setVisibility(View.GONE);
}
});
inoutimagebutton.startAnimation(animation);
}
}
}这就是全部的实现了。