Question

当我在手机中试用时，文字没有到来，应用程序将停止.......任何人都可以帮忙？调试无法找到错误，其他帧没有问题，除此之外。问题来自TextView ......如果我剪掉线条，错误就不会出现

 package com.example.soo;

  import android.support.v7.app.ActionBarActivity;
  import android.os.Bundle;
    import android.view.Menu;
   import android.view.View;
   import android.view.MenuItem;
     import android.widget.TextView;

     public class Res2Activity extends ActionBarActivity {

TextView ans3;
 TextView ans;
 TextView ans2;
 TextView ans4;
@Override
public void onCreate(Bundle savedInstanceState) {
    ans3=(TextView)findViewById(R.id.textView5);
     ans=(TextView)findViewById(R.id.textView2);
     ans2=(TextView)findViewById(R.id.textView4);
     ans4=(TextView)findViewById(R.id.textView6);
    super.onCreate(savedInstanceState);
   setContentView(R.layout.res2);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.res2, menu);
    return true;
}
public void mai()
{
    Bundle bundle = getIntent().getExtras();
    double r1 =bundle.getDouble("some_key");
    double r2 =bundle.getDouble("some_key2");
    int bet =bundle.getInt("bet");
    double a2x1;
    double a2x;
     a2x1=r1*r2*bet;
     a2x=a2x1+(r1+r2)*bet;      
     String aa="if u both match wins: "+ a2x1;
     String aa2="if u both match wins: "+a2x;
     String aa3="if first match wins: "+(r1*bet);
     String aa4="if second match wins: "+(r2*bet);
             ans.setText(aa);
             ans2.setText(aa2);
             ans3.setText(aa3);
             ans4.setText(aa4);
   }
   @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);
}

}

Answer 1

Change your oncreate() method

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.res2);
    ans3=(TextView)findViewById(R.id.textView5);
    ans=(TextView)findViewById(R.id.textView2);
    ans2=(TextView)findViewById(R.id.textView4);
    ans4=(TextView)findViewById(R.id.textView6);
}

Answer 2

它会帮助你

更改

的位置

的setContentView（R.layout.res2）;

而不是你的编码将这些行放在oncreate中

     super.onCreate(savedInstanceState);
     setContentView(R.layout.res2);
     ans3=(TextView)findViewById(R.id.textView5);
     ans=(TextView)findViewById(R.id.textView2);
     ans2=(TextView)findViewById(R.id.textView4);
     ans4=(TextView)findViewById(R.id.textView6);

由于TextView，应用已停止在我的手机中

2 个答案:

的setContentView（R.layout.res2）;