安卓手機的文件讀寫


 
以上是文件的 Android SDK提供的獲取文件路徑方法

 

//讀取指定目錄下的所有TXT文件的文件內容
 protected String getFileContent(File[] files) {
  String content  = "";
  if (files != null) { // 先判斷目錄是否爲空,否則會報空指針   
            for (File file : files) {
               //檢查此路徑名的文件是否是一個目錄(文件夾)  
                if (file.isDirectory()) {
                    Log.i("zeng", "若是文件目錄。繼續讀1" + 
                    file.getName().toString()+ file.getPath().toString());  
                    getFileContent(file.listFiles());  
                    Log.i("zeng", "若是文件目錄。繼續讀2" + 
                    file.getName().toString()+ file.getPath().toString());  
                } else {
                    if (file.getName().endsWith(".txt")) {//格式爲txt文件
                     try {
                            InputStream instream = new FileInputStream(file); 
                            if (instream != null) {
                                InputStreamReader inputreader = 
                                 new InputStreamReader(instream, "GBK");
                                BufferedReader buffreader = 
                                 new BufferedReader(inputreader);
                                String line="";
                                //分行讀取
                               while (( line = buffreader.readLine()) != null) {
                                    content += line + "\n";
                                }                
                                instream.close();
                            }
                        }
                        catch (java.io.FileNotFoundException e) {
                            Log.d("TestFile", "The File doesn't not exist.");
                        } 
                        catch (IOException e)  {
                             Log.d("TestFile", e.getMessage());
                        }
                     
                    }  
                }  
            } 
            
  }
  return content ;
 }

 //讀取指定目錄下的所有TXT文件的文件名
 private String getFileName(File[] files) { 
  String str = "";
        if (files != null) { // 先判斷目錄是否爲空,否則會報空指針   
            for (File file : files) {  
                if (file.isDirectory()){//檢查此路徑名的文件是否是一個目錄(文件夾)
                    Log.i("zeng", "若是文件目錄。繼續讀1"
                     +file.getName().toString()+file.getPath().toString());  
                    getFileName(file.listFiles());  
                    Log.i("zeng", "若是文件目錄。繼續讀2"
                     +file.getName().toString()+ file.getPath().toString());  
                } else {  
                    String fileName = file.getName();  
                    if (fileName.endsWith(".txt")) {
                        String s=fileName.substring(0,fileName.lastIndexOf(".")).toString();  
                        Log.i("zeng", "文件名txt::   " + s);  
                        str += fileName.substring(0,fileName.lastIndexOf("."))+"\n";
                    }  
                }  
            } 
            
        }
        return str;
    } 
 
}
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原文鏈接:https://blog.csdn.net/bzlj2912009596/article/details/70770013/

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