删除android缓存

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1. System.out.println("getCacheDir: "+WebViewActivity.this.getCacheDir());  
2.     System.out.println("PackageResourcePath(): "+WebViewActivity.this.getPackageCodePath());  
3.     System.out.println("getCacheDir: "+WebViewActivity.this.getPackageResourcePath());  
4.     System.out.println("FilesDir: "+WebViewActivity.this.getDatabasePath("webview.db").getPath());  
5.     System.out.println("FilesDir: "+WebViewActivity.this.getFilesDir().getPath())  

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1.    

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1. 03-31 11:54:52.094: I/System.out(22224): getCacheDir: /data/data/com.liao.webview/cache  
2. 03-31 11:54:52.094: I/System.out(22224): PackageResourcePath(): /data/app/com.liao.webview-1.apk  
3. 03-31 11:54:52.115: I/System.out(22224): getCacheDir: /data/app/com.liao.webview-1.apk  
4. 03-31 11:54:52.115: I/System.out(22224): FilesDir: /data/data/com.liao.webview/databases/webview.db  
5. 03-31 11:54:52.154: I/System.out(22224): FilesDir: /data/data/com.liao.webview/files  
6. 03-31 11:54:52.265: I/ActivityManager(59): Displayed activity com.liao.webview/.WebViewActivity: 418 ms (total 418 ms)  

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1.    

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1. // clear the cache before time numDays       
2. private int clearCacheFolder(File dir, long numDays) {            
3.     int deletedFiles = 0;           
4.     if (dir!= null && dir.isDirectory()) {               
5.         try {                  
6.             for (File child:dir.listFiles()) {      
7.                 if (child.isDirectory()) {                
8.                     deletedFiles += clearCacheFolder(child, numDays);            
9.                 }      
10.                 if (child.lastModified() < numDays) {       
11.                     if (child.delete()) {                     
12.                         deletedFiles++;             
13.                     }      
14.                 }      
15.             }               
16.         } catch(Exception e) {         
17.             e.printStackTrace();      
18.         }       
19.     }         
20.     return deletedFiles;       
21. }     

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1. //优先使用缓存：  
2. WebView.getSettings().setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);    

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1. <p>//不使用缓存：  
2. WebView.getSettings().setCacheMode(WebSettings.LOAD_NO_CACHE); </p>  

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1.    

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1. 退出的时候加上下面代码  

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1. File file = CacheManager.getCacheFileBaseDir();    
2.    if (file != null && file.exists() && file.isDirectory()) {    
3.     for (File item : file.listFiles()) {    
4.      item.delete();    
5.     }    
6.     file.delete();    
7.    }    
8.     
9.   context.deleteDatabase("webview.db");    
10.   context.deleteDatabase("webviewCache.db");   

原文：http://blog.youkuaiyun.com/liao3841054/article/details/7417005