我还注意到 PreferenceActivity 不会返回 onActivityResult。话虽如此,您的 SubActivity 是否有原因无法直接保存首选项?如果您需要检查它的值,您可以在 PreferenceActivity 的 onResume 处检查它作为一种解决方法。
//SubActivity onCreate
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button btn = (Button) findViewById(R.id.Button01);
btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
SharedPreferences prefs = getSharedPreferences(TestPreferenceActivity.PREFS_FILE, MODE_WORLD_READABLE);
prefs.edit().putString("mykey", "someValue").commit();
finish();
}});
}
//PreferenceActivity onResume
@Override
protected void onResume() {
Log.d(TAG, "Preferences Resumed");
//Check for new Preference Values
SharedPreferences prefs = getSharedPreferences(PREFS_FILE, MODE_WORLD_READABLE);
String value = prefs.getString("mykey", "defValue");
Log.d(TAG, "Current value is: " + value);
super.onResume();
}