Java 更新或覆盖Android支持库中的文件
我发现了FragmentTabHost.java中的一个bug,它总是为tabhost生成一个新的布局,即使指定了布局。请参阅谷歌讨论 我想在项目中覆盖此文件,但在将其导入项目时遇到错误Java 更新或覆盖Android支持库中的文件,java,android,android-fragments,Java,Android,Android Fragments,我发现了FragmentTabHost.java中的一个bug,它总是为tabhost生成一个新的布局,即使指定了布局。请参阅谷歌讨论 我想在项目中覆盖此文件,但在将其导入项目时遇到错误 有人知道使用我自己的FragmentTabHost.java副本的正确方法吗?你可以使用这个类,然后用这个类扩展你的新类 public class YourFragmentTabHost extends FragmentTabHost { FragmentTabHost.java import java.ut
有人知道使用我自己的FragmentTabHost.java副本的正确方法吗?你可以使用这个类,然后用这个类扩展你的新类
public class YourFragmentTabHost extends FragmentTabHost {
FragmentTabHost.java
import java.util.ArrayList;
import android.content.Context;
import android.content.res.TypedArray;
import android.os.Bundle;
import android.os.Parcel;
import android.os.Parcelable;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;
import android.widget.LinearLayout;
import android.widget.TabHost;
import android.widget.TabWidget;
public class FragmentTabHost extends TabHost
implements TabHost.OnTabChangeListener {
private final ArrayList<TabInfo> mTabs = new ArrayList<TabInfo>();
private FrameLayout mRealTabContent;
private Context mContext;
private FragmentManager mFragmentManager;
private int mContainerId;
private TabHost.OnTabChangeListener mOnTabChangeListener;
private TabInfo mLastTab;
private boolean mAttached;
static final class TabInfo {
private final String tag;
private final Class<?> clss;
private final Bundle args;
private Fragment fragment;
TabInfo(String _tag, Class<?> _class, Bundle _args) {
tag = _tag;
clss = _class;
args = _args;
}
}
static class DummyTabFactory implements TabHost.TabContentFactory {
private final Context mContext;
public DummyTabFactory(Context context) {
mContext = context;
}
@Override
public View createTabContent(String tag) {
View v = new View(mContext);
v.setMinimumWidth(0);
v.setMinimumHeight(0);
return v;
}
}
static class SavedState extends BaseSavedState {
String curTab;
SavedState(Parcelable superState) {
super(superState);
}
private SavedState(Parcel in) {
super(in);
curTab = in.readString();
}
@Override
public void writeToParcel(Parcel out, int flags) {
super.writeToParcel(out, flags);
out.writeString(curTab);
}
@Override
public String toString() {
return "FragmentTabHost.SavedState{"
+ Integer.toHexString(System.identityHashCode(this))
+ " curTab=" + curTab + "}";
}
public static final Parcelable.Creator<SavedState> CREATOR
= new Parcelable.Creator<SavedState>() {
public SavedState createFromParcel(Parcel in) {
return new SavedState(in);
}
public SavedState[] newArray(int size) {
return new SavedState[size];
}
};
}
public FragmentTabHost(Context context) {
// Note that we call through to the version that takes an AttributeSet,
// because the simple Context construct can result in a broken object!
super(context, null);
initFragmentTabHost(context, null);
}
public FragmentTabHost(Context context, AttributeSet attrs) {
super(context, attrs);
initFragmentTabHost(context, attrs);
}
private void initFragmentTabHost(Context context, AttributeSet attrs) {
TypedArray a = context.obtainStyledAttributes(attrs,
new int[] { android.R.attr.inflatedId }, 0, 0);
mContainerId = a.getResourceId(0, 0);
a.recycle();
super.setOnTabChangedListener(this);
}
/**
* @deprecated Don't call the original TabHost setup, you must instead
* call {@link #setup(Context, FragmentManager)} or
* {@link #setup(Context, FragmentManager, int)}.
*/
@Override @Deprecated
public void setup() {
throw new IllegalStateException(
"Must call setup() that takes a Context and FragmentManager");
}
public void setup(Context context, FragmentManager manager) {
super.setup();
mContext = context;
mFragmentManager = manager;
ensureContent();
}
public void setup(Context context, FragmentManager manager, int containerId) {
super.setup();
mContext = context;
mFragmentManager = manager;
mContainerId = containerId;
ensureContent();
mRealTabContent.setId(containerId);
// We must have an ID to be able to save/restore our state. If
// the owner hasn't set one at this point, we will set it ourself.
if (getId() == View.NO_ID) {
setId(android.R.id.tabhost);
}
}
private void ensureContent() {
if (mRealTabContent == null) {
mRealTabContent = (FrameLayout)findViewById(mContainerId);
if (mRealTabContent == null) {
throw new IllegalStateException(
"No tab content FrameLayout found for id " + mContainerId);
}
}
}
@Override
public void setOnTabChangedListener(OnTabChangeListener l) {
mOnTabChangeListener = l;
}
public void addTab(TabHost.TabSpec tabSpec, Class<?> clss, Bundle args) {
tabSpec.setContent(new DummyTabFactory(mContext));
String tag = tabSpec.getTag();
TabInfo info = new TabInfo(tag, clss, args);
if (mAttached) {
// If we are already attached to the window, then check to make
// sure this tab's fragment is inactive if it exists. This shouldn't
// normally happen.
info.fragment = mFragmentManager.findFragmentByTag(tag);
if (info.fragment != null && !info.fragment.isDetached()) {
FragmentTransaction ft = mFragmentManager.beginTransaction();
ft.detach(info.fragment);
ft.commit();
}
}
mTabs.add(info);
addTab(tabSpec);
}
@Override
protected void onAttachedToWindow() {
super.onAttachedToWindow();
String currentTab = getCurrentTabTag();
// Go through all tabs and make sure their fragments match
// the correct state.
FragmentTransaction ft = null;
for (int i=0; i<mTabs.size(); i++) {
TabInfo tab = mTabs.get(i);
tab.fragment = mFragmentManager.findFragmentByTag(tab.tag);
if (tab.fragment != null && !tab.fragment.isDetached()) {
if (tab.tag.equals(currentTab)) {
// The fragment for this tab is already there and
// active, and it is what we really want to have
// as the current tab. Nothing to do.
mLastTab = tab;
} else {
// This fragment was restored in the active state,
// but is not the current tab. Deactivate it.
if (ft == null) {
ft = mFragmentManager.beginTransaction();
}
ft.detach(tab.fragment);
}
}
}
// We are now ready to go. Make sure we are switched to the
// correct tab.
mAttached = true;
ft = doTabChanged(currentTab, ft);
if (ft != null) {
ft.commit();
mFragmentManager.executePendingTransactions();
}
}
@Override
protected void onDetachedFromWindow() {
super.onDetachedFromWindow();
mAttached = false;
}
@Override
protected Parcelable onSaveInstanceState() {
Parcelable superState = super.onSaveInstanceState();
SavedState ss = new SavedState(superState);
ss.curTab = getCurrentTabTag();
return ss;
}
@Override
protected void onRestoreInstanceState(Parcelable state) {
SavedState ss = (SavedState)state;
super.onRestoreInstanceState(ss.getSuperState());
setCurrentTabByTag(ss.curTab);
}
@Override
public void onTabChanged(String tabId) {
if (mAttached) {
android.support.v4.app.FragmentTransaction ft = doTabChanged(tabId, null);
if (ft != null) {
ft.commit();
}
}
if (mOnTabChangeListener != null) {
mOnTabChangeListener.onTabChanged(tabId);
}
}
private FragmentTransaction doTabChanged(String tabId, android.support.v4.app.FragmentTransaction ft) {
TabInfo newTab = null;
for (int i=0; i<mTabs.size(); i++) {
TabInfo tab = mTabs.get(i);
if (tab.tag.equals(tabId)) {
newTab = tab;
}
}
if (newTab == null) {
throw new IllegalStateException("No tab known for tag " + tabId);
}
if (mLastTab != newTab) {
if (ft == null) {
ft = mFragmentManager.beginTransaction();
}
if (mLastTab != null) {
if (mLastTab.fragment != null) {
ft.detach(mLastTab.fragment);
}
}
if (newTab != null) {
if (newTab.fragment == null) {
newTab.fragment = Fragment.instantiate(mContext,
newTab.clss.getName(), newTab.args);
ft.add(mContainerId, newTab.fragment, newTab.tag);
} else {
ft.attach(newTab.fragment);
}
}
mLastTab = newTab;
}
return ft;
}
}
import java.util.ArrayList;
导入android.content.Context;
导入android.content.res.TypedArray;
导入android.os.Bundle;
导入android.os.packet;
导入android.os.Parcelable;
导入android.support.v4.app.Fragment;
导入android.support.v4.app.FragmentManager;
导入android.support.v4.app.FragmentTransaction;
导入android.util.AttributeSet;
导入android.view.view;
导入android.view.ViewGroup;
导入android.widget.FrameLayout;
导入android.widget.LinearLayout;
导入android.widget.TabHost;
导入android.widget.TabWidget;
公共类FragmentTabHost扩展了TabHost
实现TabHost.OnTabChangeListener{
private final ArrayList mtab=new ArrayList();
私有框架布局mRealTabContent;
私有上下文;
私人碎片管理器MFFragmentManager;
私有int mContainerId;
私有TabHost.OnTabChangeListener-mOnTabChangeListener;
私有选项卡信息mLastTab;
私有布尔mAttached;
静态最终类TabInfo{
私有最终字符串标签;
私人期末班;
私有最终包args;
私有片段;
TabInfo(字符串标记、类、绑定参数){
标签=_标签;
clss=_类;
args=_args;
}
}
静态类DummyTabFactory实现TabHost.TabContentFactory{
私有最终上下文mContext;
公共DummyTabFactory(上下文){
mContext=上下文;
}
@凌驾
公共视图createTabContent(字符串标记){
视图v=新视图(mContext);
v、 设置最小宽度(0);
v、 设置最小高度(0);
返回v;
}
}
静态类SavedState扩展了BaseSavedState{
弦科塔布;
保存状态(可包裹的超级状态){
超级(超级国家);
}
私有存储状态(包裹在中){
超级(in),;
curTab=in.readString();
}
@凌驾
公共无效写入包(包出,内部标志){
super.writeToParcel(输出,标志);
外写限制(curTab);
}
@凌驾
公共字符串toString(){
返回“FragmentTabHost.SavedState{”
+Integer.tohextString(System.identityHashCode(this))
+“curTab=“+curTab+”}”;
}
公共静态最终包裹。创建者
=新的Parcelable.Creator(){
public SavedState createFromParcel(中的地块){
返回新的SavedState(in);
}
public SavedState[]新数组(整数大小){
返回新的SavedState[大小];
}
};
}
公共FragmentTabHost(上下文){
//请注意,我们调用了采用AttributeSet的版本,
//因为简单的上下文构造可能会导致断开的对象!
super(上下文,null);
initFragmentTabHost(上下文,null);
}
公共FragmentTabHost(上下文、属性集属性){
超级(上下文,attrs);
initFragmentTabHost(上下文,attrs);
}
私有void initFragmentTabHost(上下文上下文,属性集属性){
TypedArray a=上下文。获取样式属性(属性,
新的int[]{android.R.attr.inflatedId},0,0);
mContainerId=a.getResourceId(0,0);
a、 回收();
super.setOnTabChangedListener(这个);
}
/**
*@deprecated不要调用原始的TabHost安装程序,您必须改为
*调用{@link#setup(Context,FragmentManager)}或
*{@link#setup(Context,FragmentManager,int)}。
*/
@覆盖@Deprecated
公共作废设置(){
抛出新的非法状态异常(
“必须调用接受上下文和碎片管理器的setup()”;
}
公共无效设置(上下文、碎片管理器){
super.setup();
mContext=上下文;
MFFragmentManager=经理;
确保内容();
}
公共无效设置(上下文上下文、FragmentManager、int containerId){
super.setup();
mContext=上下文;
MFFragmentManager=经理;
mContainerId=集装箱id;
确保内容();
mRealTabContent.setId(containerId);
//我们必须有一个ID才能保存/恢复我们的状态。如果
//业主目前还没有设置,我们将自行设置。
if(getId()==视图。无\u ID){
setId(android.R.id.tabhost);
}
}
私人会议{
if(mRealTabContent==null){
mRealTabContent=(FrameLayout)findViewById(mContainerId);
if(mRealTabContent==null){
抛出新的非法状态异常(
“找不到id“+mContainerId”的选项卡内容框架布局);
}
}
}
@凌驾
公共无效setOnTabChangedListener(OnTabChangeListener l){
mOnTabChangeListener=l;
}
public void addTab(TabHost.TabSpec TabSpec,类cls,Bundle args){
tabSpec.setContent(新的DummyTabFactory(mContext));
String tag=tabSpec.getTag();
TabInfo=新TabInfo(标签、clss、参数);
如果(mAttached){
//如果我们已经连接到窗口,请检查以使
//确保此选项卡的片段不活动(如果存在)。不应
//没有