Android 读写文件

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读取raw文件

// 读取raw文件  
   private void rawRead(){  
   String ret = "";  
   
   try {  
   InputStream is = getResources().openRawResource(R.raw.my_raw);  
   
   int len = is.available();  
   byte ]buffer = new byte[len];  
   
   is.read(buffer);  
   ret = EncodingUtils.getString(buffer, "utf-8");  
   
   is.close();  
   } catch (Exception e) {  
   e.printStackTrace();  
   }  
   
   tvTXT.setText(ret);  
   }

读取assets文件

// 读取assets文件  
private void assetsRead(){  
   String fileName = "my_assets.txt";              // assets下文件  
//  String fileName = "test/my_assets_test.txt";    // assets下子目录文件  
   String ret = "";  
   
   try {  
   InputStream is = getResources().getAssets().open(fileName);  
   int len = is.available();  
   byte ]buffer = new byte[len];  
   
   is.read(buffer);  
   ret = EncodingUtils.getString(buffer, "utf-8");  
   
   is.close();  
   } catch (Exception e) {  
   e.printStackTrace();  
   }  
   
   tvTXT.setText(ret);  
}

读取sdcard文件

// 读取sdcard文件  
private void sdcardRead(){  
   String fileName = "/sdcard/my_sdcard.txt";              // assets下文件  
//  String fileName = "/sdcard/test/my_sdcard_test.txt";    // sdcard下子目录文件  
   String ret = "";  
   
   try {  
   FileInputStream fis = new FileInputStream(fileName);  
   
   int len = fis.available();  
   byte ]buffer = new byte[len];  
   
   fis.read(buffer);  
   ret = EncodingUtils.getString(buffer, "UTF-8");  
   
   fis.close();  
   } catch (Exception e) {  
   e.printStackTrace();  
   }  
   
   tvTXT.setText(ret);  
}