小编ind*_*irl的帖子

根据google,一个返回主要共享/外部存储目录,另一个获取顶级共享/外部存储目录,用于放置特定类型的文件.有人能用简单的语言和例子来解释吗？

在我得到的错误l.setOnClickListener(this);,它说的东西setOnclicklistner在adapterview无法应用等

    import android.os.Bundle;
    import android.view.View;
    import android.widget.Adapter;
    import android.widget.AdapterView;
    import android.widget.ArrayAdapter;
    import android.widget.ListView;
    import android.widget.TextView;
    import android.widget.Toast;

    public class MainActivity extends AppCompatActivity implements AdapterView.OnItemClickListener {
    ListView l;
    String[] days={"Sunday","monday","tuesday","wedensday","thursday","friday","saturday"};
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        l=(ListView)findViewById(R.id.listView);
        ArrayAdapter<String>adapter=new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,days);
        l.setAdapter(adapter);
        l.setOnClickListener(this);
    }

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        TextView temp=(TextView)view;
        Toast.makeText(this,""+temp.getText()+" "+position,Toast.LENGTH_LONG).show();

    }
}