eclipse 提示 ContextCompat中不包含checkSelfPermission方法？

如图

import android.support.v4.app.ActivityCompat优艾设计网_设计圈;
import android.support.v4.content.ContextCompat;

代码如下

private void requestPermission(String permission){ if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M){ if (ContextCompat.checkSelfPermission(BookListActivity.this,Manifest.permission.READ_EXTERNAL_STORAGE)         != PackageManager.PERMISSION_GRANTED) {        ActivityCompat.requestPermissions(BookListActivity.this,                 new String[]{Manifest.permission.READ_EXTERNAL_STORAGE},                 MY_PERMISSIONS_REQUEST_READ_CONTACTS);} } }

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