Question

通过适配器在同一布局中将数据库行显示为ListView / Gridview，是否可以选择将它们显示在单独的页面（如相同布局）中。因此，我可以通过按钮切换到下一页。目前，我只是使用sharedprefernce保存值并更改布局中的内容（在我的情况下，只需 TEXT ）。我正在尝试使用一个问题和4个选项来创建用于考试的应用程序。当前，当用户单击“下一步”按钮时，正在保存用户分数并在共享首选项中选中了单选按钮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();
}


}

只要给我一个链接或想法即可以任何简单的方式进行思考。

Answer 1

想要使用AdapterViewFlipper的声音 https://developer.android.com/reference/android/widget/AdapterViewFlipper 使用自定义适配器

这将使用适配器中的数据从模板生成视图例如每个问题可以在单独的页面上，并带有按钮以移至下一个问题。

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

但是您可能不想使用自动翻转选项，而是将下一个按钮链接到.方法

相同布局的不同页面中的数据库内容

1 个答案: