Android获取assets文件夹中的数据并写入SD卡示例

import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import android.content.Context;/*将assets文件夹下的数据库写入SD卡中 * @author Dave */public class WriteToSD { private Context context; String filePath = android.os.Environment.getExternalStorageDirectory()+"/weather"; public WriteToSD(Context context){ this.context = context; if(!isExist()){  write(); } } private void write(){ InputStream inputStream; try {  inputStream = context.getResources().getAssets().open("addressId.db");  File file = new File(filePath);  if(!file.exists()){  file.mkdirs();  }  FileOutputStream fileOutputStream = new FileOutputStream(filePath + "/database.db");  byte[] buffer = new byte[512];  int count = 0;  while((count = inputStream.read(buffer)) > 0){  fileOutputStream.write(buffer, 0 ,count);  }  fileOutputStream.flush();  fileOutputStream.close();  inputStream.close();  System.out.println("success"); } catch (IOException e) {  e.printStackTrace(); } } private boolean isExist(){ File file = new File(filePath + "/database.db"); if(file.exists()){  return true; }else{  return false; } }}