Problem bei Appentwicklung

package de.tobls.steinreich;

import android.content.SharedPreferences;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.RelativeLayout;
import android.widget.TabHost;
import android.widget.TextView;




public class MainActivity extends ActionBarActivity implements View.OnClickListener {

protected long stones;
protected long spc = 1;
protected long pricePickaxe = 1;

@override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

TextView textviewQtystone = (TextView) findViewById(R.id.textviewQtystone);


SharedPreferences Speicher = getSharedPreferences("Datastorage", 0);
stones = Speicher.getLong("S", 0);
spc = Speicher.getLong("SPC", 0);
textviewQtystone.setText(String.valueOf(stones));


TabHost tabHost = (TabHost) findViewById(R.id.tabHost);
tabHost.setup();

TabHost.TabSpec tabSpec = tabHost.newTabSpec("resource");
tabSpec.setContent(R.id.tabResource);
tabSpec.setIndicator("Resource");
tabHost.addTab(tabSpec);

tabSpec = tabHost.newTabSpec("shop");
tabSpec.setContent(R.id.tabShop);
tabSpec.setIndicator("Shop");
tabHost.addTab(tabSpec);


ImageButton imgbuttonCounter = (ImageButton) findViewById(R.id.imgbuttonCounter);
imgbuttonCounter.setOnClickListener(this);

Button buttonBuypickaxe = (Button) findViewById(R.id.buttonBuypickaxe);
buttonBuypickaxe.setOnClickListener(this);


}

@override
public void onClick(View v) {
switch (v.getId()){
case R.id.imgbuttonCounter:
TextView textviewQtystone = (TextView) findViewById(R.id.textviewQtystone);
SharedPreferences Speicher = getSharedPreferences("Datastorage", 0);
spc = Speicher.getLong("SPC", 1);
stones = stones + spc;
textviewQtystone.setText(String.valueOf(stones));
case R.id.buttonBuypickaxe:
textviewQtystone = (TextView) findViewById(R.id.textviewQtystone);
Speicher = getSharedPreferences("Datastorage", 0);
stones = Speicher.getLong("S", 0);
if (stones <= pricePickaxe) {
spc = spc + 2;
SharedPreferences.Editor Speichereditor = Speicher.edit();
Speichereditor.putLong("SPC", spc);
Speichereditor.commit();
stones = stones - pricePickaxe;
pricePickaxe = pricePickaxe * (25/100);
textviewQtystone.setText(String.valueOf(stones));
}
}
}
}

Zum Vergrößern anklicken....