MethodsCompat（Android各版本的兼容方法）

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import java.io.File;
import android.annotation.TargetApi;
import android.app.Activity;
import android.content.ContentResolver;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory.Options;
import android.graphics.Paint;
import android.os.Build;
import android.provider.MediaStore;
import android.view.View;
import android.view.Window;


/**
* Android各版本的兼容方法
* @author liux (http://my.oschina.net/liux)
* @version 1.0
* @created 2012-8-6
*/
public class MethodsCompat {
   
    @TargetApi(5)
    public static void overridePendingTransition(Activity activity, int enter_anim, int exit_anim) {
           activity.overridePendingTransition(enter_anim, exit_anim);
    }


    @TargetApi(7)
    public static Bitmap getThumbnail(ContentResolver cr, long origId, int kind, Options options) {
           return MediaStore.Images.Thumbnails.getThumbnail(cr,origId,kind, options);
    }
    
    @TargetApi(8)
    public static File getExternalCacheDir(Context context) {


//     // return context.getExternalCacheDir(); API level 8
//
//     // e.g. "<sdcard>/Android/data/<package_name>/cache/"
//     final File extCacheDir = new File(Environment.getExternalStorageDirectory(),
//         "/Android/data/" + context.getApplicationInfo().packageName + "/cache/");
//     extCacheDir.mkdirs();
//     return extCacheDir;


        return context.getExternalCacheDir();
    }


    @TargetApi(11)
    public static void recreate(Activity activity) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
            activity.recreate();
        }
    }


    @TargetApi(11)
    public static void setLayerType(View view, int layerType, Paint paint) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
            view.setLayerType(layerType, paint);
        }
    }


    @TargetApi(14)
    public static void setUiOptions(Window window, int uiOptions) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
            window.setUiOptions(uiOptions);
        }
    }
        
}