求大神给看看安卓登录界面的代码为啥一点就崩溃
package com.example.myandroid;
import android.support.v7.app.ActionBarActivity;
import android.support.v4.app.Fragment;
import android.app.AlertDialog;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
public class MainActivity extends ActionBarActivity {
private String username1="vigoss";
EditText username2;
EditText mima2;
private String mima1="123456";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_main);
EditText username2=(EditText) findViewById(R.id.editText1);
EditText mima2=(EditText) findViewById(R.id.editText2);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
public void CC(View source){
if(username1.equals(username2.getText().toString())&&mima1.equals(mima2.getText().toString())){
new AlertDialog.Builder(MainActivity.this)
.setTitle("登陆成功")
.setMessage("真的")
.setPositiveButton("OK", null)
.show();
}
}
@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);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
public PlaceholderFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
return rootView;
}
}
}
CC是我在xml里面 onclick的事件