可能是重复的问题。但我找不到我的问题的解决方案
我有一个带有 3 个标签的 TabHost。比方说tabA，，tabB。当我切换到另一个选项卡（即 tabA 或 tabB）时tabC，我做了很多视图更改，例如按钮文本更改、editText 更改，然后我失去了所有视图更改。我所有的视图值（按钮和editTexts），它将我的所有视图重置为默认的XML文件值。我不希望这种情况发生。我只想如何保存我的观点状态。我不能在标签更改时丢失这个。tabCtabC
我试过这个链接但失败了。
这是我的代码
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
Toast.makeText(getActivity(), "onCreateView", Toast.LENGTH_SHORT)
.show();
if (container == null) {
return null;
}
View vi = inflater.inflate(R.layout.settings, container, false);
btnInsert = (Button) vi.findViewById(R.id.btnInsert);
btnInsert.setOnClickListener(this);
btnPosition = (Button) vi.findViewById(R.id.btnPosition);
btnPosition.setOnClickListener(this);
txtPosition = (TextView) vi.findViewById(R.id.txtPosition);
txtLogo = (TextView) vi.findViewById(R.id.txtLogo);
imgLogoPreview = (ImageView) vi.findViewById(R.id.imgLogoPreview);
imgLogoPreview.setOnClickListener(this);
edTxtUserText = (EditText) vi.findViewById(R.id.edTxtPreview);
relLogo = (RelativeLayout) vi.findViewById(R.id.RelLogo);
relText = (RelativeLayout) vi.findViewById(R.id.RelText);
logoWheel = (WheelView) vi.findViewById(R.id.wheelLogo);
logoWheel.setAdapter(new ArrayWheelAdapter<String>(logoWheelList));
logoWheel.setVisibleItems(4);
logoWheel.setCurrentItem(1);
positionWheel = (WheelView) vi.findViewById(R.id.wheelPosition);
positionWheel.setAdapter(new ArrayWheelAdapter<String>(
positionWheelTextList));
// LogoWheel changed listener
changedListenerLogo = new OnWheelChangedListener() {
public void onChanged(WheelView wheel, int oldValue, int newValue) {
if (!wheelScrolled) {
}
}
};
logoWheel.addChangingListener(changedListenerLogo);
// Wheel scrolled listener
scrolledListenerLogo = new OnWheelScrollListener() {
public void onScrollStarts(WheelView wheel) {
wheelScrolled = true;
}
public void onScrollEnds(WheelView wheel) {
wheelScrolled = false;
btnInsert.setText(logoWheelList[wheel.getCurrentItem()] + "");
wheel.setVisibility(View.INVISIBLE);
if (wheel.getCurrentItem() == 2) {
txtPosition.setVisibility(View.INVISIBLE);
btnPosition.setVisibility(View.INVISIBLE);
relText.setVisibility(View.INVISIBLE);
relLogo.setVisibility(View.INVISIBLE);
} else if (wheel.getCurrentItem() == 1) {
relText.setVisibility(View.VISIBLE);
relLogo.setVisibility(View.INVISIBLE);
txtPosition.setVisibility(View.VISIBLE);
btnPosition.setVisibility(View.VISIBLE);
btnPosition.setText("Top");
positionWheel.setAdapter(new ArrayWheelAdapter<String>(
positionWheelTextList));
positionWheel.setVisibleItems(4);
positionWheel.setCurrentItem(1);
} else if (wheel.getCurrentItem() == 0) {
relLogo.setVisibility(View.VISIBLE);
relText.setVisibility(View.INVISIBLE);
txtPosition.setVisibility(View.VISIBLE);
btnPosition.setVisibility(View.VISIBLE);
btnPosition.setText("Top Left");
positionWheel.setAdapter(new ArrayWheelAdapter<String>(
positionWheelLogoList));
positionWheel.setVisibleItems(4);
positionWheel.setCurrentItem(1);
}
}
};
logoWheel.addScrollingListener(scrolledListenerLogo);
// /////////////////////Positon Wheel Listners///////////
// LogoWheel changed listener
changedListenerPosition = new OnWheelChangedListener() {
public void onChanged(WheelView wheel, int oldValue, int newValue) {
if (!wheelScrolled) {
}
}
};
positionWheel.addChangingListener(changedListenerPosition);
// Wheel scrolled listener
scrolledListenerPosition = new OnWheelScrollListener() {
public void onScrollStarts(WheelView wheel) {
wheelScrolled = true;
}
public void onScrollEnds(WheelView wheel) {
wheelScrolled = false;
String btnStatus = btnInsert.getText().toString();
if (btnStatus.equals("Logo")) {
btnPosition.setText(positionWheelLogoList[positionWheel
.getCurrentItem()] + "");
} else if (btnStatus.equals("Text")) {
btnPosition.setText(positionWheelTextList[positionWheel
.getCurrentItem()] + "");
}
wheel.setVisibility(View.INVISIBLE);
}
};
positionWheel.addScrollingListener(scrolledListenerPosition);
return vi;
}
编辑 这是我的 FragmentActivity 的代码
public class MainActivity extends FragmentActivity implements
TabHost.OnTabChangeListener {
private TabHost mTabHost;
private HashMap mapTabInfo = new HashMap();
private TabInfo mLastTab = null;
private class TabInfo {
private String tag;
private Class clss;
private Bundle args;
private Fragment fragment;
TabInfo(String tag, Class clazz, Bundle args) {
this.tag = tag;
this.clss = clazz;
this.args = args;
}
}
class TabFactory implements TabContentFactory {
private final Context mContext;
/**
* @param context
*/
public TabFactory(Context context) {
mContext = context;
}
/**
* (non-Javadoc)
*
* @see android.widget.TabHost.TabContentFactory#createTabContent(java.lang.String)
*/
public View createTabContent(String tag) {
View v = new View(mContext);
v.setMinimumWidth(0);
v.setMinimumHeight(0);
return v;
}
}
/**
* (non-Javadoc)
*
* @see android.support.v4.app.FragmentActivity#onCreate(android.os.Bundle)
*/
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Step 1: Inflate layout
setContentView(R.layout.tabs_layout);
// Step 2: Setup TabHost
initialiseTabHost(savedInstanceState);
if (savedInstanceState != null) {
mTabHost.setCurrentTabByTag(savedInstanceState.getString("tab")); // set
}
}
/**
* (non-Javadoc)
*
* @see android.support.v4.app.FragmentActivity#onSaveInstanceState(android.os.Bundle)
*/
protected void onSaveInstanceState(Bundle outState) {
outState.putString("tab", mTabHost.getCurrentTabTag()); // save the tab
// selected
super.onSaveInstanceState(outState);
}
/**
* Step 2: Setup TabHost
*/
private void initialiseTabHost(Bundle args) {
mTabHost = (TabHost) findViewById(android.R.id.tabhost);
mTabHost.setup();
TabInfo tabInfo = null;
MainActivity.addTab(
this,
this.mTabHost,
this.mTabHost.newTabSpec("Tab1").setIndicator("Home",
getResources().getDrawable(R.drawable.instructions)),
(tabInfo = new TabInfo("Tab1", Instructions.class, args)));
this.mapTabInfo.put(tabInfo.tag, tabInfo);
MainActivity.addTab(
this,
this.mTabHost,
this.mTabHost.newTabSpec("Tab2").setIndicator("Capture",
getResources().getDrawable(R.drawable.capture)),
(tabInfo = new TabInfo("Tab2", Capture.class, args)));
this.mapTabInfo.put(tabInfo.tag, tabInfo);
MainActivity.addTab(
this,
this.mTabHost,
this.mTabHost.newTabSpec("Tab3").setIndicator("Settings",
getResources().getDrawable(R.drawable.settings)),
(tabInfo = new TabInfo("Tab3", Settings.class, args)));
this.mapTabInfo.put(tabInfo.tag, tabInfo);
// Default to first tab
this.onTabChanged("Tab1");
//
mTabHost.setOnTabChangedListener(this);
}
/**
* @param activity
* @param tabHost
* @param tabSpec
* @param clss
* @param args
*/
private static void addTab(MainActivity activity, TabHost tabHost,
TabHost.TabSpec tabSpec, TabInfo tabInfo) {
// Attach a Tab view factory to the spec
tabSpec.setContent(activity.new TabFactory(activity));
String tag = tabSpec.getTag();
// Check to see if we already have a fragment for this tab, probably
// from a previously saved state. If so, deactivate it, because our
// initial state is that a tab isn't shown.
tabInfo.fragment = activity.getSupportFragmentManager()
.findFragmentByTag(tag);
if (tabInfo.fragment != null && !tabInfo.fragment.isDetached()) {
FragmentTransaction ft = activity.getSupportFragmentManager()
.beginTransaction();
ft.detach(tabInfo.fragment);
ft.commit();
activity.getSupportFragmentManager().executePendingTransactions();
}
tabHost.addTab(tabSpec);
}
/**
* (non-Javadoc)
*
* @see android.widget.TabHost.OnTabChangeListener#onTabChanged(java.lang.String)
*/
public void onTabChanged(String tag) {
TabInfo newTab = (TabInfo) this.mapTabInfo.get(tag);
if (mLastTab != newTab) {
FragmentTransaction ft = this.getSupportFragmentManager()
.beginTransaction();
if (mLastTab != null) {
if (mLastTab.fragment != null) {
ft.detach(mLastTab.fragment);
}
}
if (newTab != null) {
if (newTab.fragment == null) {
newTab.fragment = Fragment.instantiate(this,
newTab.clss.getName(), newTab.args);
ft.add(R.id.realtabcontent, newTab.fragment, newTab.tag);
} else {
ft.attach(newTab.fragment);
}
}
mLastTab = newTab;
ft.commit();
this.getSupportFragmentManager().executePendingTransactions();
}
}
}
我正在关注本教程。