我在这里遇到问题你能帮帮我吗？我很喜欢这个应用程序关于测验。现在你看到的第一件事是类别，这是类：
package com.laurenswuytsjordipapen.cultural.pursuit;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.view.View;
import android.widget.Button;
import com.laurenswuytsjordipapen.cultural.pursuit.library.UserFunctions;
public class DashboardActivity extends Activity {
UserFunctions userFunctions;
Button btnLogout;
Button btnEuropa;
Button btnAmerika;
Button btnAfrika;
Button btnAzie;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
/**
* Dashboard Screen for the application
* */
// Check login status in database
userFunctions = new UserFunctions();
if(userFunctions.isUserLoggedIn(getApplicationContext())){
setContentView(R.layout.dashboard);
btnLogout = (Button) findViewById(R.id.btnLogout);
btnEuropa = (Button) findViewById(R.id.btnEuropa);
btnAmerika = (Button) findViewById(R.id.btnAmerika);
btnAfrika = (Button) findViewById(R.id.btnAfrika);
btnAzie = (Button) findViewById(R.id.btnAzie);
btnLogout.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
// TODO Auto-generated method stub
userFunctions.logoutUser(getApplicationContext());
Intent login = new Intent(getApplicationContext(), LoginActivity.class);
login.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(login);
// Closing dashboard screen
finish();
}
});
btnEuropa.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
Intent start = new Intent(DashboardActivity.this, MainActivity.class);
start.putExtra("continent","europa");
start.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(start);
finish();
}
});
btnAmerika.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
Intent start = new Intent(DashboardActivity.this, MainActivity.class);
start.putExtra("continent","amerika");
start.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(start);
finish();
}
});
btnAfrika.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
Intent start = new Intent(DashboardActivity.this, MainActivity.class);
start.putExtra("continent","afrika");
start.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(start);
finish();
}
});
btnAzie.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
Intent start = new Intent(DashboardActivity.this, MainActivity.class);
start.putExtra("continent","azie");
start.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(start);
finish();
}
});
}else{
// user is not logged in show login screen
Intent login = new Intent(getApplicationContext(), LoginActivity.class);
login.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(login);
// Closing dashboard screen
finish();
}
}
}
当您第一次打开应用程序并单击类别时，例如：欧洲。你得到所有关于欧洲的问题。当我将类别更改为美国时，您仍然会收到来自欧洲的所有问题。当我清除我的应用程序的数据时，它就结束了。如果我从美国开始，我会收到美国的问题，但如果我换到欧洲，我仍然会收到来自美国的问题。
这是 MainActivity 中的代码：
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Bundle extras = getIntent().getExtras();
if (extras != null) {
value = extras.getString("continent");
}
DBHelper db=new DBHelper(this, value);
这是 DBHelper 中的代码：
String continent;
String input;
public DBHelper(Context context, String input) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
continent = input;
}
然后我用的是得到这些：
if(continent.equals("europa")){
.....
}if(continent.equals("amerika")){
....}
你能帮我卡住吗！！
提前致谢！