URI路径也对，provider也注册了，在同一个APK可以获取到contentprovider的数据，但是跨进程就不行了，哪个大神帮忙解答一下，谢谢

package com.example.testprovider;

import androidx.appcompat.app.AppCompatActivity;

import android.content.ContentResolver;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
import android.view.View;

public class MainActivity extends AppCompatActivity {

    private static final String TAG = "MainActivity";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    //点击获取
    public void getRemoteUser(View view){

        ContentResolver contentResolver = getContentResolver();
        Uri uri = Uri.parse("content://com.example.contentprovider");
        Cursor cursor = contentResolver.query(uri, null, null, null, null);
        Log.d(TAG,"uri == "+uri+"\n"+cursor);

        String[] columnNames = cursor.getColumnNames();
        for (String columnName : columnNames) {
            Log.d(TAG,"columnName -- >"+columnName);
        }
        while (cursor.moveToNext()) {
            Log.d(TAG,"==========================================================");
            for (String columnName : columnNames) {
                String value = cursor.getString(cursor.getColumnIndex(columnName));
                Log.d(TAG,columnName + " ---- " + value);

            }Log.d(TAG,"==========================================================");
        }
        cursor.close();
    }
}