So I put this project aside a few weeks ago and it worked perfectly. I made a few changes to one of the activities earlier today, loaded it into the emulator, and it died after getting to my menu screen (splash --> menu --> new activities). So after two crashes, I tried a different activity. One worked. Back... clicked another that hasn't been touched, boom. Force close/crash. I haven't changed anything in the menu java or XML file, nor the manifest.

What in the world could be causing this? There are no errors in Eclipse and I haven't changed anything, I thought, to cause it to do this.

log attached:

---

```
08-14 14:34:45.301: W/KeyCharacterMap(343): No keyboard for id 0
08-14 14:34:45.301: W/KeyCharacterMap(343): Using default keymap: /system/usr/keychars/qwerty.kcm.bin
08-14 14:35:40.461: D/AndroidRuntime(343): Shutting down VM
08-14 14:35:40.471: W/dalvikvm(343): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
08-14 14:35:40.491: E/AndroidRuntime(343): FATAL EXCEPTION: main
08-14 14:35:40.491: E/AndroidRuntime(343): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.tomcat.performance/com.tomcat.performance.TireTemps}: java.lang.NullPointerException
08-14 14:35:40.491: E/AndroidRuntime(343):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2585)
08-14 14:35:40.491: E/AndroidRuntime(343):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
08-14 14:35:40.491: E/AndroidRuntime(343):  at android.app.ActivityThread.access$2300(ActivityThread.java:125)
08-14 14:35:40.491: E/AndroidRuntime(343):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
08-14 14:35:40.491: E/AndroidRuntime(343):  at android.os.Handler.dispatchMessage(Handler.java:99)
08-14 14:35:40.491: E/AndroidRuntime(343):  at android.os.Looper.loop(Looper.java:123)
08-14 14:35:40.491: E/AndroidRuntime(343):  at android.app.ActivityThread.main(ActivityThread.java:4627)
08-14 14:35:40.491: E/AndroidRuntime(343):  at java.lang.reflect.Method.invokeNative(Native Method)
08-14 14:35:40.491: E/AndroidRuntime(343):  at java.lang.reflect.Method.invoke(Method.java:521)
08-14 14:35:40.491: E/AndroidRuntime(343):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
08-14 14:35:40.491: E/AndroidRuntime(343):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
08-14 14:35:40.491: E/AndroidRuntime(343):  at dalvik.system.NativeStart.main(Native Method)
08-14 14:35:40.491: E/AndroidRuntime(343): Caused by: java.lang.NullPointerException
08-14 14:35:40.491: E/AndroidRuntime(343):  at android.app.Activity.findViewById(Activity.java:1637)
08-14 14:35:40.491: E/AndroidRuntime(343):  at com.tomcat.performance.TireTemps.<init>(TireTemps.java:25)
08-14 14:35:40.491: E/AndroidRuntime(343):  at java.lang.Class.newInstanceImpl(Native Method)
08-14 14:35:40.491: E/AndroidRuntime(343):  at java.lang.Class.newInstance(Class.java:1429)
08-14 14:35:40.491: E/AndroidRuntime(343):  at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
08-14 14:35:40.491: E/AndroidRuntime(343):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577)
08-14 14:35:40.491: E/AndroidRuntime(343):  ... 11 more

```

---

TIRETEMPS.JAVA

```
package com.tomcat.performance;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Gravity;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
package com.tomcat.performance;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Gravity;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class TireTemps extends Activity implements OnClickListener {
    EditText tempLFouterString = ((EditText) findViewById(R.id.tempLFouter)),
            tempLFmiddleString = ((EditText) findViewById(R.id.tempLFmiddle)),
            tempLFinnerString = ((EditText) findViewById(R.id.tempLFinner)),
            tempRFinnerString = ((EditText) findViewById(R.id.tempRFinner)),
            tempRFmiddleString = ((EditText) findViewById(R.id.tempRFmiddle)),
            tempRFouterString = ((EditText) findViewById(R.id.tempRFouter)),
            tempRRinnerString = ((EditText) findViewById(R.id.tempRRinner)),
            tempRRmiddleString = ((EditText) findViewById(R.id.tempRRmiddle)),
            tempRRouterString = ((EditText) findViewById(R.id.tempRRouter)),
            tempLRouterString = ((EditText) findViewById(R.id.tempLRouter)),
            tempLRmiddleString = ((EditText) findViewById(R.id.tempLRmiddle)),
            tempLRinnerString = ((EditText) findViewById(R.id.tempLRinner));

    TextView tempNoseAverageString = ((TextView) findViewById(R.id.tempNoseAverage)),
            tempLFaverageString = ((TextView) findViewById(R.id.tempLFaverage)),
            tempRFaverageString = ((TextView) findViewById(R.id.tempRFaverage)),
            tempLRaverageString = ((TextView) findViewById(R.id.tempLRaverage)),
            tempRRaverageString = ((TextView) findViewById(R.id.tempRRaverage)),
            tempRearAverageString = ((TextView) findViewById(R.id.tempRearAverage)),
            tempRFLRaverageString = ((TextView) findViewById(R.id.tempRFLRaverage)),
            tempLFRRaverageString = ((TextView) findViewById(R.id.tempLFRRaverage)),
            tempRSaverageString = ((TextView) findViewById(R.id.tempRSaverage)),
            tempLSaverageString = ((TextView) findViewById(R.id.tempLSaverage));

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

        Button calculate = ((Button) findViewById(R.id.calculate));
        calculate.setOnClickListener( new View.OnClickListener() {
            public void onClick(View arg0) {
                double tempLFouter, tempLFmiddle, tempLFinner, tempRFinner, tempRFmiddle, 
                       tempRFouter, tempLRouter, tempLRmiddle, tempLRinner, tempRRinner, 
                       tempRRmiddle, tempRRouter, tempNoseAverage, tempLFaverage, tempRFaverage, 
                       tempLRaverage, tempRRaverage, tempRearAverage, tempRFLRaverage, tempLFRRaverage, 
                       tempLSaverage, tempRSaverage;

                try {
                    tempLFouter = Double.parseDouble(tempLFouterString.getText().toString());
                    tempLFinner = Double.parseDouble(tempLFinnerString.getText().toString());
                    tempLFmiddle = Double.parseDouble(tempLFmiddleString.getText().toString());
                    tempRFouter = Double.parseDouble(tempRFouterString.getText().toString());
                    tempRFmiddle = Double.parseDouble(tempRFmiddleString.getText().toString());
                    tempRFinner = Double.parseDouble(tempRFinnerString.getText().toString());
                    tempRRouter = Double.parseDouble(tempRRouterString.getText().toString());
                    tempRRmiddle = Double.parseDouble(tempRRmiddleString.getText().toString());
                    tempRRinner = Double.parseDouble(tempRRinnerString.getText().toString());
                    tempLRouter = Double.parseDouble(tempLRouterString.getText().toString());
                    tempLRmiddle = Double.parseDouble(tempLRmiddleString.getText().toString());
                    tempLRinner = Double.parseDouble(tempLRinnerString.getText().toString());

                    tempLFaverage = ((tempLFinner + tempLFmiddle + tempLFouter) / 3);
                    tempRFaverage = ((tempRFinner + tempRFmiddle + tempRFouter) / 3);
                    tempLRaverage = ((tempLRinner + tempLRmiddle + tempLRouter) / 3);
                    tempRRaverage = ((tempRRinner + tempRRmiddle + tempRRouter) / 3);
                    tempNoseAverage = ((tempLFaverage + tempRFaverage) / 2);
                    tempRearAverage = ((tempLRaverage + tempRRaverage) / 2);
                    tempRFLRaverage = ((tempRFaverage + tempLRaverage) / 2);
                    tempLFRRaverage = ((tempLFaverage + tempRRaverage) / 2);
                    tempLSaverage = ((tempLFaverage + tempLRaverage) / 2);
                    tempRSaverage = ((tempRFaverage + tempRRaverage) / 2);

                    tempNoseAverageString.setText(String.valueOf(String.format("%.1f", tempNoseAverage)) + "°");
                    tempLFaverageString.setText(String.valueOf(String.format("%.1f", tempLFaverage)) + "°");
                    tempRFaverageString.setText(String.valueOf(String.format("%.1f", tempRFaverage)) + "°");
                    tempLRaverageString.setText(String.valueOf(String.format("%.1f", tempLRaverage)) + "°");
                    tempRRaverageString.setText(String.valueOf(String.format("%.1f", tempRRaverage)) + "°");
                    tempRearAverageString.setText(String.valueOf(String.format("%.1f", tempRearAverage)) + "°");
                    tempRFLRaverageString.setText(String.valueOf(String.format("%.1f", tempRFLRaverage)) + "°");
                    tempLFRRaverageString.setText(String.valueOf(String.format("%.1f", tempLFRRaverage)) + "°");
                    tempLSaverageString.setText(String.valueOf(String.format("%.1f", tempLSaverage)) + "°");
                    tempRSaverageString.setText(String.valueOf(String.format("%.1f", tempRSaverage)) + "°");

                } catch (NumberFormatException e) {
                    Toast andEggs = Toast
                            .makeText(TireTemps.this,
                             "Please verify only numbers are used in your inputs with no blank data.",
                             Toast.LENGTH_LONG);
                    andEggs.show();
                } catch (NullPointerException n) {
                    Toast andEggs = Toast.makeText(TireTemps.this, "Please enter all temperature data for each tire.",
                            Toast.LENGTH_LONG);
                    andEggs.show();
                }
            }
        });

        Button reset_temps = ((Button) findViewById(R.id.reset_temps));
        reset_temps.setOnClickListener( new View.OnClickListener() {
            public void onClick(View arg0) {
                tempLFouterString.setText("");
                tempLFinnerString.setText("");
                tempLFmiddleString.setText("");
                tempRFouterString.setText("");
                tempRFmiddleString.setText("");
                tempRFinnerString.setText("");
                tempRRouterString.setText("");
                tempRRmiddleString.setText("");
                tempRRinnerString.setText("");
                tempLRouterString.setText("");
                tempLRmiddleString.setText("");
                tempLRinnerString.setText("");

                tempNoseAverageString.setText("");
                tempLFaverageString.setText("");
                tempRFaverageString.setText("");
                tempLRaverageString.setText("");
                tempRRaverageString.setText("");
                tempRearAverageString.setText("");
                tempRFLRaverageString.setText("");
                tempLFRRaverageString.setText("");
                tempLSaverageString.setText("");
                tempRSaverageString.setText("");

                Toast andEggs = Toast.makeText(TireTemps.this, "All data has been reset.", Toast.LENGTH_LONG);
                andEggs.show();

            }
        });
    }

    public void onClick(View arg0) {
        // TODO Auto-generated method stub

    }
}

```

EDIT: Added TireTemps.java