无法识别getExternalStorageDirectory（）

Question

private Context mContext;


 public Upload(Context context, DropboxAPI<?> api, String dropboxPath) 
    {

        // We set the context this way so we don't accidentally leak activities
        mContext = context.getApplicationContext();

        String outPath = mContext.getExternalStorageDirectory(null).getAbsolutePath() + "/" +"a1.jpg";

错误：方法getExternalStorageDirectory（）未定义类型Context

String outPath = mContext.getExternalFilesDir("mnt/sdcard").getAbsolutePath() + "/" +"a1.jpg";

工作得很好..

Answer 1

getExternalStorageDirectory()未定义为Context类型。它在Environment类中定义，它是一种静态方法。

Answer 2

使用

String outPath = Environment.getExternalStorageDirectory(null).getAbsolutePath() + "/" +"a1.jpg";

而不是

String outPath = mContext.getExternalStorageDirectory(null).getAbsolutePath() + "/" +"a1.jpg";