我遇到了一些問題與我的應用程序...我有一個設置活動,用戶可以選擇應用程序的主題,然後我有一個按鈕,說「返回」並返回用戶到主Activity。之後,主題得到保存,一切正常。但我的問題是,如果用戶點擊了「Android後退按鈕」,我的主題不會被保存。有一種方法可以解決它?使用後退按鈕保存sharedPreferences
這裏是我的設置活動:
public class SettingsActivity extends Activity implements OnClickListener {
public static final String PREF_NAME = "MyPrefsFile";
public static int newTheme;
public final static int THEME_DARK = R.style.DarkTheme;
public final static int THEME_LIGHT = R.style.LightTheme;
public final static int THEME_COLORS = R.style.ColorsTheme;
public final static int THEME_PERF = R.style.Performance;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
SharedPreferences settings = getSharedPreferences(PREF_NAME, MODE_PRIVATE);
newTheme = settings.getInt("themeCustom", 0);
if(newTheme == THEME_DARK) {
setTheme(R.style.DarkTheme);
} else if(newTheme == THEME_LIGHT){
setTheme(R.style.LightTheme);
} else if(newTheme == THEME_COLORS) {
setTheme(R.style.ColorsTheme);
} else {
setTheme(R.style.Performance);
}
setContentView(R.layout.activity_settings);
findViewById(R.id.button2).setOnClickListener(this);
findViewById(R.id.button3).setOnClickListener(this);
findViewById(R.id.button4).setOnClickListener(this);
findViewById(R.id.button5).setOnClickListener(this);
findViewById(R.id.button6).setOnClickListener(this);
}
@Override
public void onClick(View v) {
SharedPreferences settings = getSharedPreferences(PREF_NAME, MODE_PRIVATE);
SharedPreferences.Editor edit;
edit = settings.edit();
Intent intent = getIntent();
Intent main = new Intent(SettingsActivity.this,MainActivity.class);
switch (v.getId()) {
case R.id.button2:
newTheme = THEME_DARK;
edit.clear();
edit.putInt("themeCustom", newTheme);
edit.commit();
finish();
startActivity(intent);
break;
case R.id.button3:
newTheme = THEME_LIGHT;
edit.clear();
edit.putInt("themeCustom", newTheme);
edit.commit();
finish();
startActivity(intent);
break;
case R.id.button5:
newTheme = THEME_COLORS;
edit.clear();
edit.putInt("themeCustom", newTheme);
edit.commit();
finish();
startActivity(intent);
break;
case R.id.button6:
newTheme = THEME_PERF;
edit.clear();
edit.putInt("themeCustom", newTheme);
edit.commit();
finish();
startActivity(intent);
break;
case R.id.button4:
startActivity(main);
break;
default:
break;
}
}
}
非常感謝您! :)
你有嗎? – 2013-05-03 10:00:14
是的,我知道了:) – 2013-05-03 14:19:51