Android 无法设置来自数据库的按钮文本

有人能帮我解决这个小问题吗。每当我试图设置来自db的按钮文本时，它不会显示，但会显示文本视图的txt

活动

package com.iamrock.louie.saver.EasyMode;


import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import java.util.List;
import android.widget.TextView;


import com.iamrock.louie.saver.Choices.Correct;
import com.iamrock.louie.saver.Choices.Lose;
import com.iamrock.louie.saver.Choices.Wrong;
import com.iamrock.louie.saver.R;


public class EasyGame extends Activity {

    ImageView eview;
    int x;
    List<Question> quesList;
    public int qid;
    TextView txtQuestion;
    Button choice, choices;
    Question currentQ;

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


        qid = getIntent().getExtras().getInt("asd");


        DbHelper db=new DbHelper(this);
        quesList=db.getAllQuestions();
        currentQ=quesList.get(qid);
        txtQuestion=(TextView)findViewById(R.id.questtxt1);
        choice=(Button) findViewById(R.id.choice1);
        choices=(Button) findViewById(R.id.choice2);

        condition();
        if(x<5){
            txtQuestion.setText(currentQ.getQUESTION());
            choice.setText(currentQ.getOPTA());
            choices.setText(currentQ.getOPTB());
            //qid++;
        }

        choice.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                Button answer= (Button)findViewById(R.id.choice1);
                if(currentQ.getANSWER().equals(answer.getText()))
                {

                    Intent intent = new Intent(EasyGame.this, Correct.class);
                    intent.putExtra("asd", qid);
                    startActivity(intent);

                }
                else
                {//wrong answer statement
                    Intent intent = new Intent(EasyGame.this, Wrong.class);
                    intent.putExtra("asd", qid);
                    intent.putExtra("zxc", x+=1);
                    startActivity(intent);

                }

            }
        });


        choices.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {


                Button answer= (Button)findViewById(R.id.choice2);
                if(currentQ.getANSWER().equals(answer.getText()))
                {
                    Intent intent = new Intent(EasyGame.this, Correct.class);
                    intent.putExtra("asd", qid);
                    startActivity(intent);
                }
                else
                {
                    Intent intent = new Intent(EasyGame.this, Wrong.class);
                    intent.putExtra("asd", qid);
                    intent.putExtra("zxc", x+=1);
                    startActivity(intent);

                }

            }
        });

    }



    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.easy_game, menu);
        return true;
    }



    private void condition()
    {

        if(x==0)
        {
            eview = (ImageView)findViewById(R.id.puso1);
            eview.setVisibility(View.VISIBLE);
        }
        else
        if (x==1)
        {
            eview = (ImageView)findViewById(R.id.puso1);
            eview.setVisibility(View.INVISIBLE);
        }
        else
        if (x==2)
        {
            eview = (ImageView)findViewById(R.id.puso2);
            eview.setVisibility(View.INVISIBLE);
        }
        else
        if (x==3)
        {
            eview = (ImageView)findViewById(R.id.puso3);
            eview.setVisibility(View.INVISIBLE);
        }
        else
        if (x==4)
        {
            eview = (ImageView)findViewById(R.id.puso4);
            eview.setVisibility(View.INVISIBLE);
        }
        else
        if (x==5)
        {
            Intent intent = new Intent(EasyGame.this,Lose.class);
            startActivity(intent);
            eview = (ImageView)findViewById(R.id.puso5);
            eview.setVisibility(View.INVISIBLE);

        }

    }





    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}

助手

package com.iamrock.louie.saver.EasyMode;

import java.util.ArrayList;
import java.util.List;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
public class DbHelper extends SQLiteOpenHelper {

    private static final int DATABASE_VERSION = 1;
    // Database Name
    private static final String DATABASE_NAME = "saver";
    // tasks table name
    private static final String TABLE_QUEST = "quest";
    // tasks Table Columns names
    private static final String KEY_ID = "id";
    private static final String KEY_QUES = "question";
    private static final String KEY_ANSWER = "answer"; //correct option
    private static final String KEY_OPTA= "opta"; //option a
    private static final String KEY_OPTB= "optb"; //option b
    private SQLiteDatabase dbase;
    public DbHelper(Context context) {
        super(context, DATABASE_NAME, null, DATABASE_VERSION);
    }



    @Override
    public void onCreate(SQLiteDatabase db) {
        dbase=db;
        String sql = "CREATE TABLE IF NOT EXISTS " + TABLE_QUEST + " ( "
                + KEY_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " + KEY_QUES
                + " TEXT, " + KEY_ANSWER+ " TEXT, "+KEY_OPTA +" TEXT, "
                +KEY_OPTB +" TEXT)";
        db.execSQL(sql);
        addQuestions();
        //db.close();
    }



    private void addQuestions()
    {
        Question q1=new Question("What are you going to do when earthquake" +
                "  occurs and you're top in the building?",
                "   A. find something e.g.\n" +
                "           table that you can hide",
                "        B. stay on the top\n" +
                "            of the buiding",
                "   A. find something e.g.\n" +//answer
                "           table that you can hide");
        this.addQuestion(q1);

        Question q2=new Question("Sometimes there are small tremors that occur preceding an earthquake. \n" +
                "These are called “      ”?\n", "A. Foreshocks", "B. Aftershocks",
                "A. Foreshocks");//answer
        this.addQuestion(q2);

    }



    @Override
    public void onUpgrade(SQLiteDatabase db, int oldV, int newV) {
// Drop older table if existed
        db.execSQL("DROP TABLE IF EXISTS " + TABLE_QUEST);
// Create tables again
        onCreate(db);
    }



    // Adding new question
    public void addQuestion(Question quest) {
//SQLiteDatabase db = this.getWritableDatabase();
        ContentValues values = new ContentValues();
        values.put(KEY_QUES, quest.getQUESTION());
        values.put(KEY_ANSWER, quest.getANSWER());
        values.put(KEY_OPTA, quest.getOPTA());
        values.put(KEY_OPTB, quest.getOPTB());
// Inserting Row
        dbase.insert(TABLE_QUEST, null, values);
    }
    public List<Question> getAllQuestions() {
        List<Question> quesList = new ArrayList<Question>();
// Select All Query
        String selectQuery = "SELECT  * FROM " + TABLE_QUEST;
        dbase=this.getReadableDatabase();
        Cursor cursor = dbase.rawQuery(selectQuery, null);
// looping through all rows and adding to list
        if (cursor.moveToFirst()) {
            do {
                Question quest = new Question();
                quest.setID(cursor.getInt(0));
                quest.setQUESTION(cursor.getString(1));
                quest.setANSWER(cursor.getString(2));
                quest.setOPTA(cursor.getString(3));
                quest.setOPTB(cursor.getString(4));
                quesList.add(quest);
            } while (cursor.moveToNext());
        }
// return quest list
        return quesList;
    }
    public int rowcount()
    {
        int row=0;
        String selectQuery = "SELECT  * FROM " + TABLE_QUEST;
        SQLiteDatabase db = this.getWritableDatabase();
        Cursor cursor = db.rawQuery(selectQuery, null);
        row=cursor.getCount();
        return row;
    }
}

---

在此代码之前，您尚未指定x的值

if(x<5){
        txtQuestion.setText(currentQ.getQUESTION());
        choice.setText(currentQ.getOPTA());
        choices.setText(currentQ.getOPTB());
        //qid++;
    }

---

在此条件之前为x赋值。这可以解决您的问题。

问题出在哪里？你有例外吗？如果是，请提供logcat结果，请准确解释当您想将文本设置为button@MortezaSoleimani.the应自动设置来自数据库的按钮和文本视图文本。但是当我尝试运行程序时，它只设置textview的文本和缺少的按钮。谢谢你的反馈。这不会影响计划，先生。因为它已经被声明了。但是在这个条件下告诉我x的值是多少？它可能是零。当你宣布它是真实的。它自动为零。它在活动中全局声明。先生，您还有什么不对劲吗？请立即通知我，因为我明天需要这个。非常感谢您刚刚更改int x=0；

package com.iamrock.louie.saver.EasyMode;

import java.util.ArrayList;
import java.util.List;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
public class DbHelper extends SQLiteOpenHelper {

    private static final int DATABASE_VERSION = 1;
    // Database Name
    private static final String DATABASE_NAME = "saver";
    // tasks table name
    private static final String TABLE_QUEST = "quest";
    // tasks Table Columns names
    private static final String KEY_ID = "id";
    private static final String KEY_QUES = "question";
    private static final String KEY_ANSWER = "answer"; //correct option
    private static final String KEY_OPTA= "opta"; //option a
    private static final String KEY_OPTB= "optb"; //option b
    private SQLiteDatabase dbase;
    public DbHelper(Context context) {
        super(context, DATABASE_NAME, null, DATABASE_VERSION);
    }



    @Override
    public void onCreate(SQLiteDatabase db) {
        dbase=db;
        String sql = "CREATE TABLE IF NOT EXISTS " + TABLE_QUEST + " ( "
                + KEY_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " + KEY_QUES
                + " TEXT, " + KEY_ANSWER+ " TEXT, "+KEY_OPTA +" TEXT, "
                +KEY_OPTB +" TEXT)";
        db.execSQL(sql);
        addQuestions();
        //db.close();
    }



    private void addQuestions()
    {
        Question q1=new Question("What are you going to do when earthquake" +
                "  occurs and you're top in the building?",
                "   A. find something e.g.\n" +
                "           table that you can hide",
                "        B. stay on the top\n" +
                "            of the buiding",
                "   A. find something e.g.\n" +//answer
                "           table that you can hide");
        this.addQuestion(q1);

        Question q2=new Question("Sometimes there are small tremors that occur preceding an earthquake. \n" +
                "These are called “      ”?\n", "A. Foreshocks", "B. Aftershocks",
                "A. Foreshocks");//answer
        this.addQuestion(q2);

    }



    @Override
    public void onUpgrade(SQLiteDatabase db, int oldV, int newV) {
// Drop older table if existed
        db.execSQL("DROP TABLE IF EXISTS " + TABLE_QUEST);
// Create tables again
        onCreate(db);
    }



    // Adding new question
    public void addQuestion(Question quest) {
//SQLiteDatabase db = this.getWritableDatabase();
        ContentValues values = new ContentValues();
        values.put(KEY_QUES, quest.getQUESTION());
        values.put(KEY_ANSWER, quest.getANSWER());
        values.put(KEY_OPTA, quest.getOPTA());
        values.put(KEY_OPTB, quest.getOPTB());
// Inserting Row
        dbase.insert(TABLE_QUEST, null, values);
    }
    public List<Question> getAllQuestions() {
        List<Question> quesList = new ArrayList<Question>();
// Select All Query
        String selectQuery = "SELECT  * FROM " + TABLE_QUEST;
        dbase=this.getReadableDatabase();
        Cursor cursor = dbase.rawQuery(selectQuery, null);
// looping through all rows and adding to list
        if (cursor.moveToFirst()) {
            do {
                Question quest = new Question();
                quest.setID(cursor.getInt(0));
                quest.setQUESTION(cursor.getString(1));
                quest.setANSWER(cursor.getString(2));
                quest.setOPTA(cursor.getString(3));
                quest.setOPTB(cursor.getString(4));
                quesList.add(quest);
            } while (cursor.moveToNext());
        }
// return quest list
        return quesList;
    }
    public int rowcount()
    {
        int row=0;
        String selectQuery = "SELECT  * FROM " + TABLE_QUEST;
        SQLiteDatabase db = this.getWritableDatabase();
        Cursor cursor = db.rawQuery(selectQuery, null);
        row=cursor.getCount();
        return row;
    }
}

if(x<5){
        txtQuestion.setText(currentQ.getQUESTION());
        choice.setText(currentQ.getOPTA());
        choices.setText(currentQ.getOPTB());
        //qid++;
    }