Question

我是新来的，也是android开发的新手。我的代码有问题我希望当我点击广播组时，必须更改文本视图的文本。但这不会发生。有人可以帮帮我吗？

这是我的代码

package com.example.mine4.truefalse;
import android.app.Activity;
import android.content.Intent;
import android.os.SystemClock;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.DigitalClock;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.Toast;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;

public class NewGame extends Activity {
    int min = 1;
    int max = 20;
    int randm = (int)(Math.random() * max) + min;
    TextView level;
    TextView clock,text;
    RadioGroup rg1;
    int pos1,pos2,AVal,j=0;
    RadioButton radio1,radio2;

    QueryClass qc = new QueryClass(this);

    int correct=0;
    int wrong=0;
    String q;
    ArrayList QVal;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_new_game);
        text = (TextView) findViewById(R.id.textv);
        radio1 = (RadioButton) findViewById(R.id.radio1);
        radio2 = (RadioButton) findViewById(R.id.radio2);
        rg1 = (RadioGroup) findViewById(R.id.rg1);
        qc.open();
        AVal = qc.getANSData(randm);
        QVal = qc.getQueData(randm);

            q = (String) QVal.get(j);
            text.setText(q);
             qc.close();
            rg1.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {

                @Override
                public void onCheckedChanged(RadioGroup group, int checkedId) {
                    // TODO Auto-generated method stub
                    pos1 = rg1.indexOfChild(findViewById(checkedId));
                    pos2 = rg1.indexOfChild(findViewById(rg1.getCheckedRadioButtonId()));

                }


            });
            rg1.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {

                @Override
                public void onCheckedChanged(RadioGroup group, int checkedId) {
                    // TODO Auto-generated method stub
                    pos1 = rg1.indexOfChild(findViewById(checkedId));
                    pos2 = rg1.indexOfChild(findViewById(rg1.getCheckedRadioButtonId()));
                    if(pos2==AVal){
                        correct++;
                        text.setText("The fastest time to eat 15 Ferrero Rocher is 1 minute 10 seconds.");
                    }
                    else if(pos2!=AVal) {
                      text.setText("The fastest time to eat 15 Ferrero Rocher is 1 minute 10 seconds.");

                        wrong++;
                        // Toast.makeText(NewGame.this,wrong+"",Toast.LENGTH_LONG).show();
                    }
                    Toast.makeText(NewGame.this,pos2+"",Toast.LENGTH_SHORT).show();
                    Check();
                }


            });
        }



    public void Check(){
        if(pos2==AVal){
            correct++;
            //Toast.makeText(NewGame.this,correct+"",Toast.LENGTH_LONG).show();
        }
        else if(pos2!=AVal) {
            wrong++;
           // Toast.makeText(NewGame.this,wrong+"",Toast.LENGTH_LONG).show();
        }
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_new_game, menu);
        return true;
    }

    @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();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
    @Override
    public void onBackPressed()
    {
        // code here to show dialog
        super.onBackPressed();  // optional depending on your needs
        Intent intn = new Intent(NewGame.this,Exmain.class);
        startActivity(intn);
    }
}

Answer 1

我已经更改了你的代码..现在检查

package com.example.mine4.truefalse;
import android.app.Activity;
import android.content.Intent;
import android.os.SystemClock;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.DigitalClock;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.Toast;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;

public class NewGame extends Activity {
    int min = 1;
    int max = 20;
    int randm = (int)(Math.random() * max) + min;
    TextView level;
    Button b1;
    TextView text;
    RadioGroup rg1;
    int pos1=0,pos2,AVal,j=0;
    RadioButton radio1,radio2;
    QueryClass qc = new QueryClass(this);

    int correct=0;
    int wrong=0;
    String q;
    ArrayList QVal;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_new_game);
        text = (TextView) findViewById(R.id.textv);
        b1=(Button)findViewById(R.id.b1);
//        radio1 = (RadioButton) findViewById(R.id.radio1);
//        radio2 = (RadioButton) findViewById(R.id.radio2);
//        rg1 = (RadioGroup) findViewById(R.id.rg1);
        qc.open();
        AVal = qc.getANSData(randm);
        QVal = qc.getQueData(randm);

            q = (String) QVal.get(j);
            text.setText(q);
             qc.close();
            b1.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    for(j=0;j<QVal.size();j++) {
                        if(pos1<9) {
                            text.setText((String) QVal.get(j));
                            pos1++;
                        }
                    }
                }
            });
                }
    public void Check(){
        if(pos2==AVal){
            correct++;
            //Toast.makeText(NewGame.this,correct+"",Toast.LENGTH_LONG).show();
        }
        else if(pos2!=AVal) {
            wrong++;
           // Toast.makeText(NewGame.this,wrong+"",Toast.LENGTH_LONG).show();
        }
    }


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

    @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();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
    @Override
    public void onBackPressed()
    {
        // code here to show dialog
        super.onBackPressed();  // optional depending on your needs
        Intent intn = new Intent(NewGame.this,Exmain.class);
        startActivity(intn);
    }
}

Answer 2

尝试这样的事情：

RadioGroup rg1=(RadioGroup) findViewById(R.id.rg1);

    rg1.setOnCheckedChangeListener(new OnCheckedChangeListener() {

        public void onCheckedChanged(RadioGroup group, int checkedId) 
        {
            if(radio1.isChecked())
            {
                   text.setText("The fastest time to eat 15 Ferrero Rocher is 1 minute 10 seconds.");  //or what you want to stay inyour textView
            }
            else if(radio2.isChecked())
            {
                   text.setText("The fastest time to eat 15 Ferrero Rocher is 1 minute 10 seconds."); //or what you want to stay inyour textView
            }
         }
    });

而不是代码的这一部分：

rg1.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {

            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) {
                // TODO Auto-generated method stub
                pos1 = rg1.indexOfChild(findViewById(checkedId));
                pos2 = rg1.indexOfChild(findViewById(rg1.getCheckedRadioButtonId()));

            }


        });
        rg1.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {

            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) {
                // TODO Auto-generated method stub
                pos1 = rg1.indexOfChild(findViewById(checkedId));
                pos2 = rg1.indexOfChild(findViewById(rg1.getCheckedRadioButtonId()));
                if(pos2==AVal){
                    correct++;
                    text.setText("The fastest time to eat 15 Ferrero Rocher is 1 minute 10 seconds.");
                }
                else if(pos2!=AVal) {
                  text.setText("The fastest time to eat 15 Ferrero Rocher is 1 minute 10 seconds.");

                    wrong++;
                    // Toast.makeText(NewGame.this,wrong+"",Toast.LENGTH_LONG).show();
                }
                Toast.makeText(NewGame.this,pos2+"",Toast.LENGTH_SHORT).show();
                Check();
            }


        });

Answer 3

试试这个..

RadioGroup rg1;
TextView text;
text = (TextView) findViewById(R.id.textv);
rg1= (RadioGroup) findViewById(R.id.rg1);



    rg1.setOnCheckedChangeListener(new OnCheckedChangeListener() {



        @Override

        public void onCheckedChanged(RadioGroup group, int checkedId) {

            // find which radio button is selected

            if(checkedId == R.id.radio1) {
              text.setText("Radio 1 selected");
                Toast.makeText(getApplicationContext(), "Radio 1 selected",Toast.LENGTH_SHORT).show();

            } else if(checkedId == R.id.radio2) {

                text.setText("Radio 2 selected");
                Toast.makeText(getApplicationContext(), "Radio 2 selected",Toast.LENGTH_SHORT).show();

            } else {

                //do something when nothing selected

            }

        }



    });

Answer 4

这是新代码，请查看

＆＃13;

package com.example.mine4.truefalse;
import android.app.Activity;
import android.content.Intent;
import android.os.SystemClock;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.DigitalClock;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.Toast;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;

public class NewGame extends Activity {
    int min = 1;
    int max = 20;
    int randm = (int)(Math.random() * max) + min;
    TextView level;
    TextView clock,text;
    RadioGroup rg1;
    int pos1,pos2,AVal,j=0,k=0;
    RadioButton radio1,radio2;
    QueryClass qc = new QueryClass(this);

    int correct=0;
    int wrong=0;
    String q;
    ArrayList QVal;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_new_game);
        text = (TextView) findViewById(R.id.textv);
        radio1 = (RadioButton) findViewById(R.id.radio1);
        radio2 = (RadioButton) findViewById(R.id.radio2);
        rg1 = (RadioGroup) findViewById(R.id.rg1);
        qc.open();
        AVal = qc.getANSData(randm);
        QVal = qc.getQueData(randm);

        q = (String) QVal.get(j);
        text.setText((String) QVal.get(j));
        qc.close();
        rg1.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {

            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) {
                // TODO Auto-generated method stub
                for(j=0;j<QVal.size();j++) {
                    if(k<9) {
                        text.setText((String) QVal.get(j));
                        pos1 = rg1.indexOfChild(findViewById(checkedId));
                        pos2 = rg1.indexOfChild(findViewById(rg1.getCheckedRadioButtonId()));
                        Check();
                        k++;
                    }
                }
            }


        });

    }



    public void Check(){
        if(pos2==AVal){
            correct++;
            //Toast.makeText(NewGame.this,correct+"",Toast.LENGTH_LONG).show();
        }
        else if(pos2!=AVal) {
            wrong++;
            // Toast.makeText(NewGame.this,wrong+"",Toast.LENGTH_LONG).show();
        }
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_new_game, menu);
        return true;
    }

    @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();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
    @Override
    public void onBackPressed()
    {
        // code here to show dialog
        super.onBackPressed();  // optional depending on your needs
        Intent intn = new Intent(NewGame.this,Exmain.class);
        startActivity(intn);
    }
}

＆＃13;

在android中更改textview的值

4 个答案: