提供了三种动画效果：逐帧动画(frame-by-frame animation),这种动画和GIF一样，一帧一帧的显示来组成动画效果；布局动画（layout animation），这种动画用来设置layout内的所有UI控件；控件动画（view animation），这种是应用到具体某个view上的动画。

<animation-list xmlns:android="http://schemas.android.com/apk/res/android" android:oneshot="false"> <item android:drawable="@drawable/qq001" android:duration="80"/> <item android:drawable="@drawable/qq002" android:duration="80"/> <item android:drawable="@drawable/qq003" android:duration="80"/> <item android:drawable="@drawable/qq004" android:duration="80"/> <item android:drawable="@drawable/qq005" android:duration="80"/> <item android:drawable="@drawable/qq006" android:duration="80"/> <item android:drawable="@drawable/qq007" android:duration="80"/> <item android:drawable="@drawable/qq008" android:duration="80"/> </animation-list>

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <ImageView android:id="@+id/animation_view" android:layout_width="fill_parent" android:layout_height="wrap_content" android:src="/blog_article/@drawable/qq_animation/index.html" /> <Button android:id="@+id/animation_btn" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/start_animation" /> <Button android:id="@+id/one_shot_btn" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/play_once" /> </LinearLayout>

public class AnimActivity extends Activity { /** Called when the activity is first created. */ AnimationDrawable mAd; Button mPlayBtn; Button mOneShotBtn; boolean mIsOneShot; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); ImageView iv = (ImageView) findViewById(R.id.animation_view); mAd = (AnimationDrawable) iv.getDrawable(); mPlayBtn = (Button) findViewById(R.id.animation_btn); mPlayBtn.setOnClickListener(new OnClickListener() { @Override public void onClick(View view) { startAnimation(); } }); mOneShotBtn = (Button) findViewById(R.id.one_shot_btn); mOneShotBtn.setOnClickListener(new OnClickListener() { @Override public void onClick(View view) { if (mIsOneShot) { mOneShotBtn.setText("Play Once"); } else { mOneShotBtn.setText("Play Repeatly"); } mAd.setOneShot(!mIsOneShot); mIsOneShot = !mIsOneShot; } }); } /** * 通过AnimationDrawable的start函数播放动画， * stop函数停止动画播放， * isRunning来判断动画是否正在播放。 */ public void startAnimation() { if (mAd.isRunning()) { mAd.stop(); } else { mAd.stop(); mAd.start(); } } }

<set xmlns:android="http://schemas.android.com/apk/res/android" android:interpolator="@android:anim/decelerate_interpolator"> <alpha android:fromAlpha="0.0" android:toAlpha="1.0" android:duration="1000" /> </set>

<alpha xmlns:android="http://schemas.android.com/apk/res/android" android:interpolator="@android:anim/accelerate_interpolator" android:fromAlpha="0.0" android:toAlpha="1.0" android:duration="1000" />

<scale xmlns:android="http://schemas.android.com/apk/res/android" android:interpolator="@android:anim/accelerate_interpolator" android:fromXScale="1" android:toXScale="1" android:fromYScale="0.1" android:toYScale="1.0" android:duration="500" android:pivotX="50%" android:pivotY="50%" android:startOffset="100" />

<rotate xmlns:android="http://schemas.android.com/apk/res/android" android:interpolator="@android:anim/accelerate_interpolator" android:fromDegrees="0.0" android:toDegrees="360" android:pivotX="50%" android:pivotY="50%" android:duration="500" />

<translate xmlns:android="http://schemas.android.com/apk/res/android" android:interpolator="@android:anim/accelerate_interpolator" android:fromYDelta="-100%" android:toYDelta="0" android:duration="500" />

<set xmlns:android="http://schemas.android.com/apk/res/android" android:interpolator="@android:anim/decelerate_interpolator"> <translate android:fromYDelta="-100%" android:toYDelta="0" android:duration="500" /> <alpha android:fromAlpha="0.0" android:toAlpha="1.0" android:duration="500" /> </set>

LayoutAnimationController，该文件同样位于res/anim/目录下，下面是一个示例（res\anim\layout_anim_ctrl.xml）： <layoutAnimation xmlns:android="http://schemas.android.com/apk/res/android" android:delay="30%" android:animationOrder="reverse" android:animation="@anim/translate_alpha_anim" />

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <ListView android:id="@+id/list" android:layout_width="fill_parent" android:layout_height="fill_parent" android:persistentDrawingCache="animation|scrolling" android:layoutAnimation="@anim/layout_anim_ctrl" /> </LinearLayout>

public class ListActivity extends Activity { String[] mListItems = { "Item 1", "Item 2", "Item 3", "Item 4", "Item 5"}; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.list); ArrayAdapter<String> listItemAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, mListItems); ListView lv = (ListView) this.findViewById(R.id.list); lv.setAdapter(listItemAdapter); } }

class ViewAnimation extends Animation { public ViewAnimation() { } @Override public void initialize(int width, int height, int parentWidth, int parentHeight) { super.initialize(width, height, parentWidth, parentHeight); setDuration(2500); setFillAfter(true); setInterpolator(new LinearInterpolator()); } @Override protected void applyTransformation(float interpolatedTime, Transformation t) { final Matrix matrix = t.getMatrix(); matrix.setScale(interpolatedTime, interpolatedTime); } }

public class ViewAnimActivity extends Activity { Button mPlayBtn; ImageView mAnimImage; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.view_anim_layout); mAnimImage = (ImageView) this.findViewById(R.id.anim_image); mPlayBtn = (Button) findViewById(R.id.play_btn); mPlayBtn.setOnClickListener(new OnClickListener() { @Override public void onClick(View view) { mAnimImage.startAnimation(new ViewAnimation()); } }); } }

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <Button android:id="@+id/play_btn" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="Start Animation" /> <ImageView android:id="@+id/anim_image" android:persistentDrawingCache="animation|scrolling" android:layout_width="fill_parent" android:layout_height="wrap_content" android:src="/blog_article/@drawable/ophone/index.html" /> </LinearLayout>

class ViewAnimation extends Animation { int mCenterX;//记录View的中间坐标 int mCenterY; public ViewAnimation() { } @Override public void initialize(int width, int height, int parentWidth, int parentHeight) { super.initialize(width, height, parentWidth, parentHeight); //初始化中间坐标值 mCenterX = width/2; mCenterY = height/2; setDuration(2500); setFillAfter(true); setInterpolator(new LinearInterpolator()); } @Override protected void applyTransformation(float interpolatedTime, Transformation t) { final Matrix matrix = t.getMatrix(); matrix.setScale(interpolatedTime, interpolatedTime); //通过坐标变换，把参考点（0,0）移动到View中间 matrix.preTranslate(-mCenterX, -mCenterY); //动画完成后再移回来 matrix.postTranslate(mCenterX, mCenterY); } }

 class ViewAnimation extends Animation { int mCenterX;//记录View的中间坐标 int mCenterY; Camera camera = new Camera(); public ViewAnimation() { } @Override public void initialize(int width, int height, int parentWidth, int parentHeight) { super.initialize(width, height, parentWidth, parentHeight); //初始化中间坐标值 mCenterX = width/2; mCenterY = height/2; setDuration(2500); setFillAfter(true); setInterpolator(new LinearInterpolator()); } @Override protected void applyTransformation(float interpolatedTime, Transformation t) { // final Matrix matrix = t.getMatrix(); // matrix.setScale(interpolatedTime, interpolatedTime); // //通过坐标变换，把参考点（0,0）移动到View中间 // matrix.preTranslate(-mCenterX, -mCenterY); // //动画完成后再移回来 // matrix.postTranslate(mCenterX, mCenterY); final Matrix matrix = t.getMatrix(); camera.save(); camera.translate(0.0f, 0.0f, (1300 - 1300.0f * interpolatedTime)); camera.rotateY(360 * interpolatedTime); camera.getMatrix(matrix); matrix.preTranslate(-mCenterX, -mCenterY); matrix.postTranslate(mCenterX, mCenterY); camera.restore(); } }

typedef struct objc_property *Property;

objc_property_t *class_copyPropertyList(Class cls, unsigned int *outCount)
objc_property_t *protocol_copyPropertyList(Protocol *proto, unsigned int *outCount)

@interface Lender : NSObject {
    float alone;
}
@property float alone;
@end

id LenderClass = objc_getClass("Lender");
unsigned int outCount;
objc_property_t *properties = class_copyPropertyList(LenderClass, &outCount);

objc_property_t class_getProperty(Class cls, const char *name)
objc_property_t protocol_getProperty(Protocol *proto, const char *name, BOOL isRequiredProperty, BOOL isInstanceProperty)

id LenderClass = objc_getClass("Lender");
unsigned int outCount, i;
objc_property_t *properties = class_copyPropertyList(LenderClass, &outCount);
for (i = 0; i < outCount; i++) {
    objc_property_t property = properties;
    fprintf(stdout, "%s %s\n", property_getName(property), property_getAttributes(property));
}

文件列表

[功能]

文件列表

[思路]

1. 在android世界 文件 目录 是一样对待的 而文件也是统称 比如：视频文件 音频文件 文档文件 都是文件 都一视同仁

2. 而 File 能够封装 文件和目录

[代码]

1. 用File 来封装 /sdcard/dcim 目录

File file = new File("/sdcard/");

2. 列出该目录下的所有文件 返回 File 的数组

File[] list= file.listFiles();

3. 取出该数组的所有内容 把 File 名字 类型 存入 List<Map<String,String>> 供 SimpleAdapter 使用

for( File f : list ){
         
         Map<String,String> item =new HashMap<String, String>();
         
         item.put(COLUMN_NAME, f.getName().toString());
         
         if(f.isFile()){
          item.put(COLUMN_TYPE, "file");
         }
         else if(f.isDirectory()){
          item.put(COLUMN_TYPE, "directory");
         }
         
         index.add(item);
        }

4. 把数据装入 SimpleAdapter 并适配之

String[] from={COLUMN_NAME,COLUMN_TYPE};
        int[] to={android.R.id.text1,android.R.id.text2};
        
		SimpleAdapter adapter = new SimpleAdapter(this,index,android.R.layout.simple_list_item_2,from,to);
        
        this.setListAdapter(adapter);

5. 补充 一些关于 File 的一些函数

* 取出该 File 的名字 或 目录名
public String getName ()  

* 判断该 File 是否 文件 
public boolean isFile () 


* 判断该 File 是否 目录 
public boolean isDirectory ()

* 返回 File 对应的 目录
public String getPath () 

6. 通过 adb shell 看到的 sdcard 内容：

E:\android-dev\sdk\android-sdk-windows-1.5_r2\tools>adb shell
# cd sdcard
cd sdcard
# ls
ls
sample.mp3
folder
eoeAndroid.txt
HelloAndroid.txt
HelloWorlds.txt
edison.jpg
star.jpg
12stars0001.png
12stars0002.png
12stars0003.png
griffin.txt

而 emulator 的结果为：

done!