Android Animation实战之屏幕底部弹出PopupWindow

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
 android:layout_width="fill_parent" 
 android:layout_height="wrap_content" 
 android:gravity="center_horizontal" 
 android:orientation="vertical"> 
 
 <LinearLayout 
 android:id="@+id/pop_layout" 
 android:layout_width="fill_parent" 
 android:layout_height="wrap_content" 
 android:background="#ffffff" 
 android:layout_alignParentBottom="true" 
 android:gravity="center_horizontal" 
 android:orientation="vertical"> 
 
 <TextView 
  android:layout_width="fill_parent" 
  android:layout_height="wrap_content" 
  android:clickable="false" 
  android:gravity="center" 
  android:text="修改头像" 
  android:textColor="#8a8a8a" 
  android:textSize="15sp" /> 
 
 <View 
  android:layout_width="fill_parent" 
  android:layout_height="0.1dp" 
  android:layout_marginLeft="10dp" 
  android:layout_marginRight="10dp" 
  android:background="#00c7c0" /> 
 
 <Button 
  android:id="@+id/btn_take_photo" 
  android:layout_width="fill_parent" 
  android:layout_height="wrap_content" 
  android:text="拍照" 
  android:textColor="#0e61aa" 
  android:textSize="18sp" /> 
 
 <Button 
  android:id="@+id/btn_pick_photo" 
  android:layout_width="fill_parent" 
  android:layout_height="wrap_content" 
  android:text="从相册选择" 
  android:textColor="#0e61aa" 
  android:textSize="18sp" /> 
 
 <Button 
  android:id="@+id/btn_cancel" 
  android:layout_width="fill_parent" 
  android:layout_height="wrap_content" 
  android:layout_marginBottom="15dip" 
  android:layout_marginTop="15dip" 
  android:text="取消" 
  android:textColor="#0e61aa" 
  android:textSize="18sp" 
  android:textStyle="bold" /> 
 </LinearLayout> 
 
</RelativeLayout> 

<?xml version="1.0" encoding="utf-8"?> 
<set xmlns:android="http://schemas.android.com/apk/res/android"> 
 <translate 
 android:duration="200" 
 android:fromYDelta="0" 
 android:toYDelta="50%p" /> 
 <alpha 
 android:duration="200" 
 android:fromAlpha="1.0" 
 android:toAlpha="0.0" /> 
</set> 
显示动画pop_enter_anim.xml
<?xml version="1.0" encoding="utf-8"?> 
<set xmlns:android="http://schemas.android.com/apk/res/android"> 
 
 <translate 
 android:duration="200" 
 android:fromYDelta="100%p" 
 android:toYDelta="0" /> 
 <alpha 
 android:duration="200" 
 android:fromAlpha="0.0" 
 android:toAlpha="1.0" /> 
</set> 

import android.content.Context; 
import android.graphics.drawable.ColorDrawable; 
import android.view.LayoutInflater; 
import android.view.MotionEvent; 
import android.view.View; 
import android.widget.Button; 
import android.widget.PopupWindow; 
import android.widget.RelativeLayout; 
 
public class TakePhotoPopWin extends PopupWindow { 
 
 private Context mContext; 
 
 private View view; 
 
 private Button btn_take_photo, btn_pick_photo, btn_cancel; 
 
 
 public TakePhotoPopWin(Context mContext, View.OnClickListener itemsOnClick) { 
 
 this.view = LayoutInflater.from(mContext).inflate(R.layout.take_photo_pop, null); 
 
 btn_take_photo = (Button) view.findViewById(R.id.btn_take_photo); 
 btn_pick_photo = (Button) view.findViewById(R.id.btn_pick_photo); 
 btn_cancel = (Button) view.findViewById(R.id.btn_cancel); 
 // 取消按钮 
 btn_cancel.setOnClickListener(new View.OnClickListener() { 
 
  public void onClick(View v) { 
  // 销毁弹出框 
  dismiss(); 
  } 
 }); 
 // 设置按钮监听 
 btn_pick_photo.setOnClickListener(itemsOnClick); 
 btn_take_photo.setOnClickListener(itemsOnClick); 
 
 // 设置外部可点击 
 this.setOutsideTouchable(true); 
 // mMenuView添加OnTouchListener监听判断获取触屏位置如果在选择框外面则销毁弹出框 
 this.view.setOnTouchListener(new View.OnTouchListener() { 
 
  public boolean onTouch(View v, MotionEvent event) { 
 
  int height = view.findViewById(R.id.pop_layout).getTop(); 
 
  int y = (int) event.getY(); 
  if (event.getAction() == MotionEvent.ACTION_UP) { 
   if (y < height) { 
   dismiss(); 
   } 
  } 
  return true; 
  } 
 }); 
 
 
 /* 设置弹出窗口特征 */ 
 // 设置视图 
 this.setContentView(this.view); 
 // 设置弹出窗体的宽和高 
 this.setHeight(RelativeLayout.LayoutParams.MATCH_PARENT); 
 this.setWidth(RelativeLayout.LayoutParams.MATCH_PARENT); 
 
 // 设置弹出窗体可点击 
 this.setFocusable(true); 
 
 // 实例化一个ColorDrawable颜色为半透明 
 ColorDrawable dw = new ColorDrawable(0xb0000000); 
 // 设置弹出窗体的背景 
 this.setBackgroundDrawable(dw); 
 
 // 设置弹出窗体显示时的动画，从底部向上弹出 
 this.setAnimationStyle(R.style.take_photo_anim); 
 
 } 
} 

<style name="take_photo_anim" parent="android:Animation"> 
 <item name="android:windowEnterAnimation">@anim/pop_enter_anim</item> 
 <item name="android:windowExitAnimation">@anim/pop_exit_anim</item> 
</style> 

public void showPopFormBottom(View view) { 
 TakePhotoPopWin takePhotoPopWin = new TakePhotoPopWin(this, onClickListener); 
 //showAtLocation(View parent, int gravity, int x, int y) 
 takePhotoPopWin.showAtLocation(findViewById(R.id.main_view), Gravity.CENTER, 0, 0); 
} 
 
private View.OnClickListener onClickListener = new View.OnClickListener() { 
 @Override 
 public void onClick(View v) { 
 
 switch (v.getId()) { 
  case R.id.btn_take_photo: 
  System.out.println("btn_take_photo"); 
  break; 
  case R.id.btn_pick_photo: 
  System.out.println("btn_pick_photo"); 
  break; 
 } 
 } 
};