我試圖解決我的問題,所以我改變了這麼多的代碼。我甚至改變帖子的標題。 我可以成功地在首選項ui中更改imageview背景的顏色。但在離開碎片並再次啓動後,用戶界面無法像以前一樣更新。如何在android中首選更改imageview背景顏色?
首先,我使用sherlockactionbar。有3個選項卡。當按下第三欄時,加載一個片段,包括按鈕。當按下其中一個按鈕時,將加載另一首選項片段。
下面的代碼示出了如何調用偏好片段當按下按鈕之一: SettingsMenuFragment.java
public class SettingsMenuFragment extends SherlockFragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { Button ICSbutton= (Button) view.findViewById(R.id.CallSearchSettingsButton);
ICSbutton.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View v)
{
clearFragmentStack();
SettingsIncomingSearchFragment removeSISF = (SettingsIncomingSearchFragment) getActivity().getSupportFragmentManager().findFragmentByTag("SISF");
if(removeSISF != null)
{
getActivity().getSupportFragmentManager().beginTransaction().remove(removeSISF).commit() ;
getActivity().getSupportFragmentManager().executePendingTransactions();
}
SettingsIncomingSearchFragment Prefrag = new SettingsIncomingSearchFragment();
FragmentTransaction transaction = getActivity().getSupportFragmentManager().beginTransaction();
transaction.replace(android.R.id.content, Prefrag ,"SISF");
transaction.addToBackStack(null);
transaction.commit();
getActivity().getSupportFragmentManager().executePendingTransactions();
}
});}}
和下面的代碼顯示preferencefragment:
public class SettingsIncomingSearchFragment extends PreferenceListFragment implements SharedPreferences.OnSharedPreferenceChangeListener,PreferenceListFragment.OnPreferenceAttachedListener {
Context ctx ;
public static final String SHARED_PREFS_NAME = "settings";
LinearLayout mainlayout ;
LinearLayout sublayout ;
View view ;
Preference myPref ;
ImageView img ;
SharedPreferences sp ;
@Override
public void onCreate(Bundle icicle) {
ctx = getActivity() ;
super.onCreate(icicle);
addPreferencesFromResource(R.xml.pref_incomingsearchsettings);
myPref = (Preference) findPreference("incomingsearchbackgroundcolor");
setColor() ;
myPref.setOnPreferenceClickListener(new OnPreferenceClickListener() {
public boolean onPreferenceClick(Preference preference) {
HSVColorPickerDialog cpd = new HSVColorPickerDialog(ctx, 0xFF4488CC, new OnColorSelectedListener() {
@Override
public void colorSelected(Integer color)
{
sp.edit().putString("incomingsearchbackgroundcolor", String.valueOf(color)).commit();
}
});
cpd.setTitle("Pick a color");
cpd.show();
return true ;
}
});
}
private void setColor() {
// TODO Auto-generated method stub
LayoutInflater inflater = (LayoutInflater)
getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.rectangle_layout, null);
mainlayout = (LinearLayout)view.findViewById(R.id.rectangle_main_layout_ll);
sublayout = (LinearLayout)mainlayout.findViewById(R.id.rectangle_layout_ll);
sp = ctx.getSharedPreferences(SHARED_PREFS_NAME, ctx.MODE_PRIVATE);
String defValue = null ;
defValue = sp.getString("incomingsearchbackgroundcolor", null);
img = (ImageView)sublayout.findViewById(R.id.iv_priority);
img.setBackgroundColor(Integer.parseInt(defValue));
}
@Override
public void onPreferenceAttached(PreferenceScreen root, int xmlId) {
// TODO Auto-generated method stub
}
@Override
public void onSharedPreferenceChanged(SharedPreferences sharedPreferences,
String key) {
// TODO Auto-generated method stub
if(key.equals("incomingsearchbackgroundcolor"))
{
sp = ctx.getSharedPreferences(SHARED_PREFS_NAME, ctx.MODE_PRIVATE);
String defValue = null ;
defValue = sp.getString("incomingsearchbackgroundcolor", null);
Log.d("Debug", defValue);
int iColor = Integer.parseInt(defValue);
img.setBackgroundColor(iColor);
img.invalidate();
if(this.isAdded())
{
getActivity().getSupportFragmentManager().beginTransaction().detach(this).commit() ;
getActivity().getSupportFragmentManager().executePendingTransactions();
getActivity().getSupportFragmentManager().beginTransaction().attach(this).commit();
getActivity().getSupportFragmentManager().executePendingTransactions();
}
}
}
@Override
public void onResume()
{
super.onResume();
sp.registerOnSharedPreferenceChangeListener(this);
}
@Override
public void onPause() {
super.onPause();
sp.unregisterOnSharedPreferenceChangeListener(this);
}
}
這是首選xml
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" >
<PreferenceCategory android:summary = "Options" android:title = "OPTIONS" android:key="options">
<CheckBoxPreference android:key="IncomingCallSearch" android:summary="On/Off" android:title="Enable Incoming Call Search" android:defaultValue="true"/>
</PreferenceCategory>
<PreferenceCategory android:summary = "Screen Settings" android:title = "Screen settings" android:key="ScreenSettings" >
<ListPreference
android:entries="@array/screenLocOptions"
android:entryValues="@array/screenLocValues"
android:key="incomingcallsearch_screenlocation"
android:title="Location"
android:defaultValue="Top"/>
<Preference
android:defaultValue="0xFF000000"
android:key="incomingsearchbackgroundcolor"
android:title="Background Color"
android:layout="@layout/rectangle_layout" />
</PreferenceCategory>
,這是rectangle_layout XML
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:padding="5dp"
android:id="@+id/rectangle_main_layout_ll">
<TextView
android:id="@+id/textView1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textSize="16sp"
android:text="Background color"
android:layout_weight= "0.9"/>
<LinearLayout
android:layout_width="50dp"
android:layout_height="50dp"
android:orientation="vertical"
android:layout_weight= "0.1"
android:id="@+id/rectangle_layout_ll">
<ImageView
android:id="@+id/iv_priority"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#000000"
/>
</LinearLayout>
我寫這篇文章的先前版本,上面的代碼成功運行在第一個片段加載,ImageView的背景顏色在偏好ui中更新。我嘗試逐步寫入失敗狀態:
1。我從操作欄中選擇第三個小節,並加載一個包含按鈕的片段。 2。我按下加載首選項片段的按鈕(可以看到上面的代碼)
3。在這個偏好片段中,有一個偏好,包括textview和imageview(你可以看到上面的細節)
4。當我點擊這個首選項時,一個顏色選擇器跑了(你可以看到上面的細節)
5。我從顏色選擇器中選擇顏色並將其保存爲共享首選項(您可以看到上述詳細信息)
6。 onsharedpreferencechanged事件觸發,我改變了imageview的背景顏色(你可以看到上面的細節)成功。
7。我通過從操作欄選擇另一個選項卡或使用後備按鈕離開片段。
8。我在第3欄中按相同的按鈕啓動相同的片段。
9。我再次使用顏色選擇器,並觸發onsharedpreferencechanged事件。
10。我可以在調試中看到真正的顏色代碼來自sharedpreference,並將其設置爲imageview背景顏色,並運行以下代碼:
getActivity()。getSupportFragmentManager()。beginTransaction()。detach(this).commit( ); getActivity()。getSupportFragmentManager()。executePendingTransactions(); getActivity()。getSupportFragmentManager()。beginTransaction()。attach(this).commit(); getActivity()。getSupportFragmentManager()。executePendingTransactions();
11。但是此時不會更新偏好。在Imageview中看到舊的顏色或黑色。
非常感謝您
正如我在這個問題(http://stackoverflow.com/questions/21360959/imageview-setbackgroundcolor-is-not-working-in-android)寫的,該解決方案只適用於android 4.1.2。 – user3184643