package com.example.deleteyoumi; import java.io.File; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.app.Activity; import android.view.Menu; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.Toast; /* *@author: ZhengHaibo *web: http://blog.csdn.net/nuptboyzhb *mail: zhb931706659@126.com *2013-4-28 Nanjing,njupt,China */ public class DeleteYouMiMainActivity extends Activity implements OnClickListener { private Button deleteButton; private final static String youmiPathString = "/mnt/sdcard/Android/data/.youmicache/";//文件夹的路径 @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_delete_you_mi_main); deleteButton = (Button) findViewById(R.id.delete_youmi); deleteButton.setOnClickListener(this); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.delete_you_mi_main, menu); return true; } @Override public void onClick(View v) { // TODO Auto-generated method stub switch (v.getId()) { case R.id.delete_youmi: File file = new File(youmiPathString); DeleteFile(file); mHandler.sendEmptyMessage(1); break; default: break; } } Handler mHandler = new Handler() { public void handleMessage(Message msg) { switch (msg.what) { case 0: Toast.makeText(getApplicationContext(), "文件或文件夹不存在", Toast.LENGTH_LONG).show(); break; case 1: Toast.makeText(getApplicationContext(), "删除成功！", Toast.LENGTH_LONG).show(); break; default: break; } }; }; /** * 递归删除文件和文件夹 * * @param file * 要删除的根目录 */ public void DeleteFile(File file) { if (file.exists() == false) { mHandler.sendEmptyMessage(0); return; } else { if (file.isFile()) { file.delete(); return; } if (file.isDirectory()) { File[] childFile = file.listFiles(); if (childFile == null || childFile.length == 0) { file.delete(); return; } for (File f : childFile) { DeleteFile(f); } file.delete(); } } } }