I have used the SharedPreferences method all over my app to easily pass preference and other data. Now I'\m trying to interface with AChartEngine and I'm getting this syntax error: "The method SharedPreferences(String, int) is undefined for the type AverageHoleScoreToPar". This is the code:
...
import android.content.SharedPreferences;
import android.graphics.Color;
import android.graphics.Paint.Align;
public class AverageHoleScoreToPar extends AbstractDemoChart {
public String getName() {
return "getName";
}
public String getDesc() {
return "The average temperature in 4 Greek islands (line chart)";
}
public Intent execute(Context context) {
String PREFS_NAME = "PersistentData";
SharedPreferences prefs = SharedPreferences(PREF开发者_如何转开发S_NAME, 0);
SharedPreferences.Editor editor = prefs.edit();
int p1R_id = prefs.getInt("prefPrefp1R_id", 0);
String p1R_name = prefs.getString("prefPrefp1R_name", "");
...
Everytime I resolve one of Android or Java's well documented intricacies, I bump into another. But it's fun (most of the time) searching for the answer.
Try this code:
SharedPreferences prefs = getSharedPreferences(PREFS_NAME, MODE_PRIVATE);
instead of SharedPreferences(PREFS_NAME, MODE_PRIVATE);
If that still doesn't work for AverageHoleScoreToPar
, try to extend an Application
class and store your SharedPreferences
either in a public static SharedPreferences
variable or just a public
variable that you later get through getApplicationContext();
Here's an example with static
:
TestApplication.java:
public class TestApplication extends Application
{
public static SharedPreferences mPrefs;
@Override
public void onCreate()
{
super.onCreate();
String PREFS_NAME = "PersistentData";
SharedPreferences mPrefs = getSharedPreferences(PREFS_NAME, MODE_PRIVATE);
}
}
and in your AverageHoleScoreToPar.java
, use this:
public Intent execute(Context context) {
SharedPreferences prefs = TestApplication.mPrefs;
SharedPreferences.Editor editor = prefs.edit();
...
}
Don't forget to include the Application
class in your AndroidManifest.xml
file.
精彩评论