我想在使用登录时将用户名敬酒。但是，当我尝试单击登录按钮时，它让我强制关闭。我看了一下logcat，但什么也没显示。
这个编码是在说。它会根据我在登录屏幕中输入的名称来祝酒用户名。不会有任何密码。
我不知道我的代码有什么问题。有人可以帮我吗？
家庭活动.java：
public class homeActivity extends Activity{
Button btnLogIn;
Button btnAbout;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.homescreen);
// create a instance of SQLite Database
// Get The Reference Of Buttons
btnLogIn=(Button)findViewById(R.id.buttonLogIn);
btnAbout=(Button)findViewById(R.id.buttonAbout);
// Set OnClick Listener on SignUp button
// set OnClick Listener on About button
btnAbout.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
/// Create Intent for About and start activity
Intent intentAbout=new Intent(getApplicationContext(),about.class);
startActivity(intentAbout);
}
});
}
// Methods to handleClick Event of Sign In Button
public void LogIn(View V)
{
final Dialog dialog = new Dialog(homeActivity.this);
dialog.setContentView(R.layout.login);
dialog.setTitle("Login");
// get the Refferences of views
final EditText editTextUserName=(EditText)dialog.findViewById(R.id.editTextUserNameToLogin);
Button btnLogIn=(Button)dialog.findViewById(R.id.buttonLogIn);
// Set On ClickListener
btnLogIn.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// get The User name and Password
String userName=editTextUserName.getText().toString();
// fetch the Password form database for respective user name
// check if the Stored password matches with Password entered by user
if(userName.equals(userName))
{
Toast.makeText(homeActivity.this, "Welcome," + userName, Toast.LENGTH_LONG).show();
dialog.dismiss();
Intent mainact=new Intent(getApplicationContext(),MainActivity.class);
startActivity(mainact);
}
else
{
Toast.makeText(homeActivity.this, "No Such Username", Toast.LENGTH_LONG).show();
}
}
});
dialog.show();
}
@Override
protected void onDestroy() {
super.onDestroy();
// Close The Database
}
}
主屏幕.xml：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center_vertical"
>
<Button
android:id="@+id/buttonLogIn"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Login"
android:onClick="LogIn"/>
<Button
android:id="@+id/buttonAbout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="About" />
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/home" />
</LinearLayout>
登录.xml：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<EditText
android:id="@+id/editTextUserNameToLogin"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="User Name"
android:ems="10" >
<requestFocus />
</EditText>
<Button
android:id="@+id/buttonLogin"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Log In" />
</LinearLayout>