Android：以编程方式清除缓存

参见英文答案 > How to clear cache Android5个
如何在我的android手机程序中清除每个应用程序的缓存？ android中是否允许以编程方式清除缓存？如果允许,怎么样？我已经尝试研究它,但我找不到我需要的答案

解决方法

我找到了这个：

import java.io.File;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;

public class HelloWorld extends Activity {

   /** Called when the activity is first created. */
   @Override
   public void onCreate(Bundle *) {
      super.onCreate(*);
      setContentView(R.layout.main);
   }

   @Override
   protected void onStop(){
      super.onStop();
   }

   //Fires after the OnStop() state
   @Override
   protected void onDestroy() {
      super.onDestroy();
      try {
         trimCache(this);
      } catch (Exception e) {
         // Todo Auto-generated catch block
         e.printstacktrace();
      }
   }

   public static void trimCache(Context context) {
      try {
         File dir = context.getCacheDir();
         if (dir != null && dir.isDirectory()) {
            deleteDir(dir);
         }
      } catch (Exception e) {
         // Todo: handle exception
      }
   }

   public static boolean deleteDir(File dir) {
      if (dir != null && dir.isDirectory()) {
         String[] children = dir.list();
         for (int i = 0; i < children.length; i++) {
            boolean success = deleteDir(new File(dir,children[i]));
            if (!success) {
               return false;
            }
         }
      }

      // The directory is Now empty so delete it
      return dir.delete();
   }

}

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