android TranslateAnimation…

要实现的效果如图：

代码很简单，主要是TranslateAnimation类的

public TranslateAnimation (int fromXType, float fromXValue, int toXType, float toXValue, int fromYType, float fromYValue, int toYType, float toYValue)

Since:  API Level 1

Constructor to use when building a TranslateAnimation from code

Parameters

fromXType	Specifies how fromXValue should be interpreted. One of Animation.ABSOLUTE, Animation.RELATIVE_TO_SELF, or Animation.RELATIVE_TO_PARENT.
fromXValue	Change in X coordinate to apply at the start of the animation. This value can either be an absolute number if fromXType is ABSOLUTE, or a percentage (where 1.0 is 100%) otherwise.
toXType	Specifies how toXValue should be interpreted. One of Animation.ABSOLUTE, Animation.RELATIVE_TO_SELF, or Animation.RELATIVE_TO_PARENT.
toXValue	Change in X coordinate to apply at the end of the animation. This value can either be an absolute number if toXType is ABSOLUTE, or a percentage (where 1.0 is 100%) otherwise.
fromYType	Specifies how fromYValue should be interpreted. One of Animation.ABSOLUTE, Animation.RELATIVE_TO_SELF, or Animation.RELATIVE_TO_PARENT.
fromYValue	Change in Y coordinate to apply at the start of the animation. This value can either be an absolute number if fromYType is ABSOLUTE, or a percentage (where 1.0 is 100%) otherwise.
toYType	Specifies how toYValue should be interpreted. One of Animation.ABSOLUTE, Animation.RELATIVE_TO_SELF, or Animation.RELATIVE_TO_PARENT.
toYValue	Change in Y coordinate to apply at the end of the animation. This value can either be an absolute number if toYType is ABSOLUTE, or a percentage (where 1.0 is 100%) otherwise

代码如下：

[java] view plain copy print ?

1. package com.lenovo.wufl.translateanimationmenu;  
2.   
3. import android.app.Activity;  
4. import android.os.Bundle;  
5. import android.view.View;  
6. import android.view.View.OnClickListener;  
7. import android.view.animation.Animation;  
8. import android.view.animation.TranslateAnimation;  
9. import android.widget.Button;  
10. import android.widget.LinearLayout;  
11. import android.widget.TextView;  
12.   
13. public class TranslateAnimationMenuActivity extends Activity implements  
14.         OnClickListener {  
15.     private TextView mMenu;  
16.     private Button mButton;  
17.     private TranslateAnimation mShowAnimation;  
18.     private TranslateAnimation mHideAnimation;  
19.     private boolean isShow;  
20.   
21.       
22.     @Override  
23.     public void onCreate(Bundle savedInstanceState) {  
24.         super.onCreate(savedInstanceState);  
25.         setContentView(R.layout.main);  
26.   
27.         initView();  
28.         initAnimation();  
29.     }  
30.   
31.     private void initView() {  
32.         mMenu = (TextView) findViewById(R.id.menu);  
33.         mButton = (Button) findViewById(R.id.button);  
34.         mButton.setOnClickListener(this);  
35.         mMenu.setVisibility(View.GONE);  
36.         isShow = false;  
37.     }  
38.   
39.     private void initAnimation() {  
40.         // 从自已-1倍的位置移到自己原来的位置   
41.         mShowAnimation = new TranslateAnimation(Animation.RELATIVE_TO_SELF,  
42.                 0.0f, Animation.RELATIVE_TO_SELF, 0.0f,  
43.                 Animation.RELATIVE_TO_SELF, -1.0f, Animation.RELATIVE_TO_SELF,  
44.                 0.0f);  
45.         mHideAnimation = new TranslateAnimation(Animation.RELATIVE_TO_SELF,  
46.                 0.0f, Animation.RELATIVE_TO_SELF, 0.0f,  
47.                 Animation.RELATIVE_TO_SELF, 0.0f, Animation.RELATIVE_TO_SELF,  
48.                 -1.0f);  
49.         mShowAnimation.setDuration(500);  
50.         mHideAnimation.setDuration(500);  
51.   
52.     }  
53.   
54.     @Override  
55.     public void onClick(View v) {  
56.         if (v.getId() == R.id.button) {  
57.             if (isShow) {  
58.                 isShow = false;  
59.                 mMenu.startAnimation(mHideAnimation);  
60.                 mMenu.setVisibility(View.GONE);  
61.             } else {  
62.                 isShow = true;  
63.                 mMenu.startAnimation(mShowAnimation);  
64.                 mMenu.setVisibility(View.VISIBLE);  
65.             }  
66.         }  
67.     }  
68. }  

package com.lenovo.wufl.translateanimationmenu;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.animation.Animation;
import android.view.animation.TranslateAnimation;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;

public class TranslateAnimationMenuActivity extends Activity implements
                OnClickListener {
        private TextView mMenu;
        private Button mButton;
        private TranslateAnimation mShowAnimation;
        private TranslateAnimation mHideAnimation;
        private boolean isShow;

        
        @Override
        public void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.main);

                initView();
                initAnimation();
        }

        private void initView() {
                mMenu = (TextView) findViewById(R.id.menu);
                mButton = (Button) findViewById(R.id.button);
                mButton.setOnClickListener(this);
                mMenu.setVisibility(View.GONE);
                isShow = false;
        }

        private void initAnimation() {
                // 从自已-1倍的位置移到自己原来的位置
                mShowAnimation = new TranslateAnimation(Animation.RELATIVE_TO_SELF,
                                0.0f, Animation.RELATIVE_TO_SELF, 0.0f,
                                Animation.RELATIVE_TO_SELF, -1.0f, Animation.RELATIVE_TO_SELF,
                                0.0f);
                mHideAnimation = new TranslateAnimation(Animation.RELATIVE_TO_SELF,
                                0.0f, Animation.RELATIVE_TO_SELF, 0.0f,
                                Animation.RELATIVE_TO_SELF, 0.0f, Animation.RELATIVE_TO_SELF,
                                -1.0f);
                mShowAnimation.setDuration(500);
                mHideAnimation.setDuration(500);

        }

        @Override
        public void onClick(View v) {
                if (v.getId() == R.id.button) {
                        if (isShow) {
                                isShow = false;
                                mMenu.startAnimation(mHideAnimation);
                                mMenu.setVisibility(View.GONE);
                        } else {
                                isShow = true;
                                mMenu.startAnimation(mShowAnimation);
                                mMenu.setVisibility(View.VISIBLE);
                        }
                }
        }
}

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