不同页面中的数据库内容就像相同的布局

Question

通过适配器在同一布局中将数据库行显示为 ListView/Gridview，是否可以选择像相同布局一样在不同页面中显示这些行。所以我可以通过一个按钮切换到下一页。目前我只是使用 sharedpreference 保存值并更改布局中的内容（在我的例子中只是 TEXT）。我正在尝试为带有问题和 4 个选项的考试创建应用程序。当前正在保存用户分数并在用户单击“下一步”按钮时在共享首选项中选中单选按钮 ID。
我的代码：

package com.sap.quizmaster;

import android.content.SharedPreferences;
import android.database.Cursor;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

private MyDatabase testdb;
private Cursor mycursor;

private TextView ques;

private RadioGroup options;
private RadioButton op1;
private RadioButton op2;
private RadioButton op3;
private RadioButton op4;
private RadioButton radioButton;

private LinearLayout default_lay;
private LinearLayout default_btn_lay;
private TextView final_text;
private Button final_btn;

private Button next_btn;
private Button prev_btn;

private int checkedid = -1;
private int q_no = 1;
private String answer;
private int score = 0;

private SharedPreferences sp;
private SharedPreferences.Editor sp_edit;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    ques = findViewById(R.id.ques);
    op1 = findViewById(R.id.op1);
    op2 = findViewById(R.id.op2);
    op3 = findViewById(R.id.op3);
    op4 = findViewById(R.id.op4);
    next_btn = findViewById(R.id.next_btn);
    prev_btn = findViewById(R.id.prev_btn);
    options = findViewById(R.id.options);
    final_btn = findViewById(R.id.final_btn);
    final_text = findViewById(R.id.final_text);
    default_lay = findViewById(R.id.default_text);
    default_btn_lay = findViewById(R.id.default_btn);

    //Loading sharedpreferences
    sp = getSharedPreferences("QuizMaster", MainActivity.MODE_PRIVATE);

    //Clearing all values from sharedpreferences when app re-launching
    sp_edit = sp.edit();
    sp_edit.clear();
    sp_edit.commit();

    testdb = new MyDatabase(this);
    mycursor = testdb.getQuestion(q_no);
    setQuestion();

    next_btn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            mycursor.close();

            checkedid = options.getCheckedRadioButtonId();
            saveInteger(q_no, checkedid);
            if (checkedid != -1) {
                radioButton = findViewById(checkedid);
                if (radioButton.getText().equals(answer)) {
                    score += 3;
                } else {
                    score -= 1;
                }
            }
            options.clearCheck();
            q_no = q_no + 1;
            if(q_no>3){
                default_btn_lay.setVisibility(View.GONE);
                default_lay.setVisibility(View.GONE);
                final_btn.setVisibility(View.VISIBLE);
                final_text.setVisibility(View.VISIBLE);
                final_text.setText("Your Score is "+score);
                q_no = 1;
                return;
            }


                checkedid = sp.getInt(q_no + "", -1);
                if (checkedid != -1) {
                    radioButton = findViewById(checkedid);
                    radioButton.setChecked(true);
                }
                mycursor = testdb.getQuestion(q_no);
                setQuestion();
        }
    });
    prev_btn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            mycursor.close();

            if (q_no <= 1) {
                Toast.makeText(MainActivity.this, "END", Toast.LENGTH_SHORT).show();
                return;
            }
            q_no = q_no - 1;
            mycursor = testdb.getQuestion(q_no);
            setQuestion();

            checkedid = sp.getInt(q_no + "", -1);
            if (checkedid != -1) {
                radioButton = findViewById(checkedid);
                radioButton.setChecked(true);

                if (radioButton.getText().equals(answer)) {
                    score -= 3;
                } else {
                    score += 1;
                }
            }
            Toast.makeText(MainActivity.this, "Button PREVIOUS pressed", Toast.LENGTH_SHORT).show();
        }
    });

    final_btn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            final_text.setVisibility(View.GONE);
            final_btn.setVisibility(View.GONE);
            default_lay.setVisibility(View.VISIBLE);
            default_btn_lay.setVisibility(View.VISIBLE);
            mycursor = testdb.getQuestion(q_no);
            setQuestion();
            sp_edit = sp.edit();
            sp_edit.clear();
            sp_edit.commit();
            score = 0;
        }
    });
}


@Override
protected void onDestroy() {
    super.onDestroy();
    testdb.close();
    mycursor.close();
}

public void setQuestion() {
    answer = mycursor.getString(mycursor.getColumnIndex("ANS"));

    ques.setText(mycursor.getString(mycursor.getColumnIndex("QUES")));
    op1.setText(mycursor.getString(mycursor.getColumnIndex("OP1")));
    op2.setText(mycursor.getString(mycursor.getColumnIndex("OP2")));
    op3.setText(mycursor.getString(mycursor.getColumnIndex("OP3")));
    op4.setText(mycursor.getString(mycursor.getColumnIndex("OP4")));
}

public void saveInteger(int ques, int value) {
    sp_edit = sp.edit();
    sp_edit.putInt(ques + "", value);
    sp_edit.apply();
}


}

只要给我一个 link 或想法，以任何简单的方式思考。

Answer 1

听起来您想使用 AdapterViewFlipper https://developer.android.com/reference/android/widget/AdapterViewFlipper 使用自定义适配器

这将使用来自适配器的数据从模板生成视图例如每个问题都可以在一个单独的页面上，并带有一个按钮以移至下一个问题。

示例https://abhiandroid.com/ui/adapterviewflipper

但您可能不想使用自动翻转选项，而是 link showNext() 方法的下一步按钮

不同页面中的数据库内容就像相同的布局

Database contents in different pages like same layout

android

android-layout

android-view

android-adapterview