[移动开发]C++学习（四七二）android保存文件

1、保存到/data/user/0/com.flx.testfilestorage/files

try {
    //mode参数注意下,这里使用的Context.MODE_PRIVATE
    FileOutputStream fileOutputStream = new FileOutputStream(new File(externalFile, "aaaa.txt"),true);//在文件后添加
    String content="ssdfsdfd";
    fileOutputStream.write(content.getBytes());
    outputStream.write( "Use OutputStream Create file\n".getBytes() );
    outputStream.close();
} catch (IOException e) {
    Log.d( TAG, "outputStream err:"+e.getMessage() );
}

2、保存到/storage/emulated/0/Android/data/com.flx.testfilestorage/files

String state = Environment.getExternalStorageState();
File externalFile = context.getExternalFilesDir( null );
File[] externalFiles = context.getExternalFilesDirs( Environment.DIRECTORY_PICTURES );
for (File file : externalFiles) {
    Log.d( TAG, "state="+ state + ";\nexternalFiles=" + file + ";\nexternalFile="+externalFile);
    try {
        FileOutputStream fileOutputStream = new FileOutputStream( new File( file, "aaaa.txt" ) );
        fileOutputStream.close();
    } catch (IOException e) {
        e.printStackTrace();
    }
}