在android中更改textview的值

-1

我是新來的，也是在android開發中。我的代碼有問題我希望當我點擊收音機組時，必須更改文本視圖的文本。但這沒有發生。有人可以幫我這裏是我的代碼在android中更改textview的值

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; 
 
    QuerryClass qc=new QuerryClass(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); 
 
    } 
 
}

來源

2015-04-30 Chaudry Junaid SaifUllah Chadh

是不是真的你的意圖，你的隨機randm將是百達相同的價值？ – Opiatefuchs

你不應該註冊的radiogroup checkchangedlistener 2次......這是第一個錯誤..我認爲這就是爲什麼在事件調用...第一個監聽器被解僱......並沒有什麼可以在textview上工作..作爲監聽器塊不包含代碼來對textview文本進行更改 –

先生檢查我上傳的新代碼但它也不起作用 –

我已經改變你的代碼..現在檢查

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; 
    QuerryClass qc=new QuerryClass(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); 
    } 
}

來源

2015-04-30 07:16:08

先生我使用了您的建議但我沒有收到我的結果我上傳了新的我認爲更好的變化 –

與這樣的嘗試：

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 
      } 
     } 
    });

而不是你的代碼的這一部分：

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(); 
      } 


     });

來源

2015-04-30 07:21:30

試試這個..

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 

      } 

     } 



    });

來源

2015-04-30 07:28:07

這是新的代碼，請檢查一下

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; 
 
    QuerryClass qc=new QuerryClass(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); 
 
    } 
 
}

來源

2015-04-30 07:53:45

在android中更改textview的值

回答

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