Android Can';别把我的头缠在机器人碎片上
我正挣扎着将我的头脑集中在碎片和活动上 我正在编写一个应用程序,它使用一个ActionBar来浏览“特色音频项目”列表,以及一个包含他们自己的“音频项目”列表的“节目”列表。我正在使用ActionBarSherlock和兼容软件包 当您单击ActionBar选项卡时,它应该显示该活动/片段。当你点击列表中的某个内容时,它会打开一个新的片段/活动,显示该节目/音频项 我看过了各种演示/示例,并了解有几种方法可以做到这一点 我的问题是:Android Can';别把我的头缠在机器人碎片上,android,android-fragments,android-actionbar,Android,Android Fragments,Android Actionbar,我正挣扎着将我的头脑集中在碎片和活动上 我正在编写一个应用程序,它使用一个ActionBar来浏览“特色音频项目”列表,以及一个包含他们自己的“音频项目”列表的“节目”列表。我正在使用ActionBarSherlock和兼容软件包 当您单击ActionBar选项卡时,它应该显示该活动/片段。当你点击列表中的某个内容时,它会打开一个新的片段/活动,显示该节目/音频项 我看过了各种演示/示例,并了解有几种方法可以做到这一点 我的问题是: 这个节目的结构是什么? e、 g.每个片段的活动?一个活动
- 这个节目的结构是什么?
- e、 g.每个片段的活动?一个活动包含多个片段
- 你如何导航这些碎片?
- e、 g.意图
- 如何在所有活动中拥有持久的ActionBar
- 初始化ActionBar的主活动,处理主片段导航
- 每个主片段都有一个onclick侦听器
- onClickListener将当前显示的片段替换为一个新片段,并初始化为显示正确的项
//public class ProgrammesFragment extends SherlockListFragment
@Override
public void onListItemClick(ListView l, View v, int position, long id) {
showDetails(id);
}
/**
* Helper function to show the details of a selected item, either by
* displaying a fragment in-place in the current UI, or starting a
* whole new activity in which it is displayed.
*/
void showDetails(long index) {
// Check what fragment is currently shown, replace if needed.
ProgrammeFragment details = (ProgrammeFragment) getFragmentManager().findFragmentByTag(ProgrammeFragment.TAG);
if (details == null || details.getShownIndex() != index) {
// Make new fragment to show this selection.
details = ProgrammeFragment.newInstance(index);
// Execute a transaction, replacing any existing fragment
// with this one inside the frame.
FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.remove(getFragmentManager().findFragmentByTag(ProgrammesFragment.TAG));
ft.add(android.R.id.content, details, ProgrammeFragment.TAG);
ft.addToBackStack(null);
ft.commit();
}
}
//public class ProgrammeFragment extends SherlockListFragment
/**
* Create a new instance of ProgrammeFragment, initialized to
* show the text at 'index'.
*/
public static ProgrammeFragment newInstance(long index) {
ProgrammeFragment f = new ProgrammeFragment();
// Supply index input as an argument.
Bundle args = new Bundle();
args.putLong("programme_id", index);
f.setArguments(args);
return f;
}
public long getShownIndex() {
return getArguments().getLong("programme_id", 0);
}
详细信息片段片段:
//public class ProgrammesFragment extends SherlockListFragment
@Override
public void onListItemClick(ListView l, View v, int position, long id) {
showDetails(id);
}
/**
* Helper function to show the details of a selected item, either by
* displaying a fragment in-place in the current UI, or starting a
* whole new activity in which it is displayed.
*/
void showDetails(long index) {
// Check what fragment is currently shown, replace if needed.
ProgrammeFragment details = (ProgrammeFragment) getFragmentManager().findFragmentByTag(ProgrammeFragment.TAG);
if (details == null || details.getShownIndex() != index) {
// Make new fragment to show this selection.
details = ProgrammeFragment.newInstance(index);
// Execute a transaction, replacing any existing fragment
// with this one inside the frame.
FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.remove(getFragmentManager().findFragmentByTag(ProgrammesFragment.TAG));
ft.add(android.R.id.content, details, ProgrammeFragment.TAG);
ft.addToBackStack(null);
ft.commit();
}
}
//public class ProgrammeFragment extends SherlockListFragment
/**
* Create a new instance of ProgrammeFragment, initialized to
* show the text at 'index'.
*/
public static ProgrammeFragment newInstance(long index) {
ProgrammeFragment f = new ProgrammeFragment();
// Supply index input as an argument.
Bundle args = new Bundle();
args.putLong("programme_id", index);
f.setArguments(args);
return f;
}
public long getShownIndex() {
return getArguments().getLong("programme_id", 0);
}
详细信息片段在SQL ContentResolver之上使用LoaderManager,并调用getShownIndex为select查询构建条件
这是可行的(目前),不确定内存使用情况或诸如此类的事情。但我们拭目以待
似乎这样有助于让你的思想更清晰,这样你就可以回答你自己的问题:p在你的主要活动的一次创建中,你创建并添加所有选项卡(一个选项卡=1个SherlockFragment类)。在主活动中,必须有一个作为TabAdapter的内部类。在我下面的示例中,TabAdapter也是一个ViewPager,因此您可以在屏幕上的任意位置左右滑动以在选项卡之间切换。以下是主要课程:
import java.util.ArrayList;
import library.DatabaseHandler;
import library.UserFunctions;
import org.json.JSONObject;
import com.actionbarsherlock.R;
import com.actionbarsherlock.app.ActionBar;
import com.actionbarsherlock.app.ActionBar.Tab;
import com.actionbarsherlock.app.SherlockFragment;
import com.actionbarsherlock.app.SherlockFragmentActivity;
import com.actionbarsherlock.view.Menu;
import com.actionbarsherlock.view.MenuInflater;
import com.actionbarsherlock.view.MenuItem;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.util.Log;
import android.view.View.OnClickListener;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.Switch;
import android.widget.TextView;
import android.widget.Toast;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
public class Polling extends SherlockFragmentActivity {
private ViewPager mViewPager;
private TabsAdapter mTabsAdapter;
ActionBar bar;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mViewPager = new ViewPager(this);
mViewPager.setId(R.id.pager);
setContentView(mViewPager);
bar = getSupportActionBar();
bar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
bar.setDisplayShowTitleEnabled(false);
bar.setDisplayShowHomeEnabled(false);
mTabsAdapter = new TabsAdapter(this, mViewPager);
mTabsAdapter.addTab(bar.newTab().setText(R.string.login),
LoginFragment.class, null);
mTabsAdapter.addTab(bar.newTab().setText(R.string.economics),
EconFragment.class, null);
mTabsAdapter.addTab(bar.newTab().setText(R.string.elections),
ElectionsFragment.class, null);
mTabsAdapter.addTab(bar.newTab().setText(R.string.politics),
PoliticsFragment.class, null);
mTabsAdapter.addTab(bar.newTab().setText(R.string.science),
ScienceFragment.class, null);
mTabsAdapter.addTab(bar.newTab().setText(R.string.finance),
FinanceFragment.class, null);
mTabsAdapter.addTab(bar.newTab().setText(R.string.religion),
ReligionFragment.class, null);
mTabsAdapter.addTab(bar.newTab().setText(R.string.military),
MilitaryFragment.class, null);
mTabsAdapter.addTab(bar.newTab().setText(R.string.international),
InternationalFragment.class, null);
}
public static class TabsAdapter extends FragmentPagerAdapter
implements ActionBar.TabListener, ViewPager.OnPageChangeListener {
private final Context mContext;
private final ActionBar mActionBar;
private final ViewPager mViewPager;
private final ArrayList<TabInfo> mTabs = new ArrayList<TabInfo>();
static final class TabInfo {
private final Class<?> clss;
private final Bundle args;
TabInfo(Class<?> _class, Bundle _args) {
clss = _class;
args = _args;
}
}
public TabsAdapter(SherlockFragmentActivity activity, ViewPager pager) {
super(activity.getSupportFragmentManager());
mContext = activity;
mActionBar = activity.getSupportActionBar();
mViewPager = pager;
mViewPager.setAdapter(this);
mViewPager.setOnPageChangeListener(this);
}
public void addTab(ActionBar.Tab tab, Class<?> clss, Bundle args) {
TabInfo info = new TabInfo(clss, args);
tab.setTag(info);
tab.setTabListener(this);
mTabs.add(info);
mActionBar.addTab(tab);
notifyDataSetChanged();
}
public int getCount() {
return mTabs.size();
}
public SherlockFragment getItem(int position) {
TabInfo info = mTabs.get(position);
return (SherlockFragment)Fragment.instantiate(mContext, info.clss.getName(), info.args);
}
public void onPageSelected(int position) {
mActionBar.setSelectedNavigationItem(position);
}
public void onPageScrollStateChanged(int state) {}
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {}
public void onTabSelected(Tab tab, FragmentTransaction ft) {
mViewPager.setCurrentItem(tab.getPosition());
//Log.v(TAG, "clicked");
Object tag = tab.getTag();
for (int i=0; i<mTabs.size(); i++) {
if (mTabs.get(i) == tag) {
mViewPager.setCurrentItem(i);
}
}
}
public void onTabUnselected(Tab tab, FragmentTransaction ft) {}
public void onTabReselected(Tab tab, FragmentTransaction ft) {}
public void onTabReselected(Tab tab, android.app.FragmentTransaction ft) {}
public void onTabUnselected(Tab tab, android.app.FragmentTransaction ft) {}
}
}
onResume/onCreateView中具有临时UI的另一个片段:
import com.actionbarsherlock.R;
import com.actionbarsherlock.app.SherlockFragment;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.view.ViewGroup.LayoutParams;
import android.view.inputmethod.InputMethodManager;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.ScrollView;
import android.widget.TableLayout;
import android.widget.TableRow;
import android.widget.TextView;
public class EconFragment extends SherlockFragment {
private TableLayout questionContainer;
int pos = 0;
private String[] titles = {"The first title ", "hallo1","hallo2", "hallo3",
"hallo4", "hallo5","hallo6", "hallo7","hallo8", "hallo9"};
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
Log.v("Econ", "onCreateView");
View v = inflater.inflate(R.layout.econfragment, container, false);
questionContainer = (TableLayout) v.findViewById(R.id.questionContainer);
//bs
int leftMargin=5;
int topMargin=5;
int rightMargin=5;
int bottomMargin=5;
while (pos < 10) {
View question = inflater.inflate(R.layout.question, null);
question.setId(pos);
TextView title = (TextView) question.findViewById(R.id.questionTextView);
title.setText(titles[pos]);
Button charts = (Button) question.findViewById(R.id.chartsButton);
charts.setId(pos);
charts.setOnClickListener(chartsListener);
TableRow tr = (TableRow) question;
TableLayout.LayoutParams trParams = new TableLayout.LayoutParams(
TableLayout.LayoutParams.MATCH_PARENT,
TableLayout.LayoutParams.WRAP_CONTENT);
trParams.setMargins(leftMargin, topMargin, rightMargin, bottomMargin);
tr.setLayoutParams(trParams);
Log.v("econ", "while loop");
questionContainer.addView(tr);
pos++;
}
pos = 0;
return v;
}
public void onResume() {
super.onResume();
Log.v("Econ", "onResume");
}
public OnClickListener chartsListener = new OnClickListener() {
@Override
public void onClick(View v) {
Intent chart = new Intent();
chart.setClass(getActivity(), Chart.class);
chart.putExtra("key", titles[v.getId()]);
Log.v("TAG", Integer.toString(v.getId()));
startActivity(chart);
}
};
public void onAttach(Activity activity) {
super.onAttach(activity);
Log.d("Econ", "onAttach");
}
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.d("Econ", "onCreate");
//Log.v("ECON", savedInstanceState.toString());
}
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
Log.d("Econ", "onActivityCreated");
}
public void onStart() {
super.onStart();
Log.d("Econ", "OnStart");
}
public void onPause() {
super.onPause();
Log.d("Econ", "onpause");
}
public void onStop() {
super.onStop();
Log.d("Econ", "onstop");
}
public void onDestroyView() {
super.onDestroyView();
Log.d("Econ", "ondestroyview");
}
public void onDestroy() {
super.onDestroy();
Log.d("Econ", "ondestroy");
}
public void onDetach() {
super.onDetach();
Log.d("Econ", "ondetach");
}
}
导入com.actionbarsherlock.R;
导入com.actionbarsherlock.app.SherlockFragment;
导入android.app.Activity;
导入android.app.AlertDialog;
导入android.content.Context;
导入android.content.Intent;
导入android.os.Bundle;
导入android.util.Log;
导入android.view.LayoutInflater;
导入android.view.view;
导入android.view.ViewGroup;
导入android.view.view.OnClickListener;
导入android.view.ViewGroup.LayoutParams;
导入android.view.inputmethod.InputMethodManager;
导入android.widget.Button;
导入android.widget.LinearLayout;
导入android.widget.RelativeLayout;
导入android.widget.ScrollView;
导入android.widget.TableLayout;
导入android.widget.TableRow;
导入android.widget.TextView;
公共类EconFragment扩展了SherlockFragment{
专用表格和容器;
int pos=0;
私有字符串[]titles={“第一个标题”、“hallo1”、“hallo2”、“hallo3”,
“哈罗四号”、“哈罗五号”、“哈罗六号”、“哈罗七号”、“哈罗八号”、“哈罗九号”};
CreateView上的公共视图(布局、充气机、视图组容器、捆绑包保存状态){
Log.v(“Econ”、“onCreateView”);
视图v=充气机。充气(R.layout.econfragment,容器,错误);
questionContainer=(TableLayout)v.findViewById(R.id.questionContainer);
//学士学位
int leftMargin=5;
int-topMargin=5;
int rightMargin=5;
int-bottomMargin=5;
而(位置<10){
视图问题=充气机。充气(R.layout.question,null);
问题.setId(pos);
TextView title=(TextView)question.findViewById(R.id.questionTextView);
title.setText(titles[pos]);
按钮图表=(按钮)问题.findViewById(R.id.chartsButton);
图表。setId(pos);
charts.setOnClickListener(chartsListener);
TableRow tr=(TableRow)问题;
TableLayout.LayoutParams trParams=新建TableLayout.LayoutParams(
TableLayout.LayoutParams.MATCH_父级,
TableLayout.LayoutParams.WRAP_内容);
trParams.setMargins(左页边距、上页边距、右页边距、下页边距);
tr.setLayoutParams(trParams);
Log.v(“经济”、“while循环”);
questionContainer.addView(tr);
pos++;
}
pos=0;
返回v;
}
恢复时公开作废(){
super.onResume();
日志v(“经济”、“恢复中”);
}
public OnClickListener chartsListener=new OnClickListener(){
@凌驾
公共void onClick(视图v){
意向图=新意向();
setClass(getActivity(),chart.class);
chart.putExtra(“key”,titles[v.getId()]);
Log.v(“TAG”,Integer.toString(v.getId());
星图;
}
};
公共事务主任(活动){
超级转速计(活动);
对数d(“经济”、“转速”);
}
创建时的公共void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
Log.d(“Econ”、“onCreate”);
//Log.v(“ECON”,savedInstanceState.toString());
}
已创建ActivityState上的公共无效(Bundle savedInstanceState){
super.onActivityCreated(savedInstanceState);
Log.d(“Econ”、“onActivityCreated”);
}
public void onStart(){
super.onStart();
Log.d(“经济”、“启动”);
}
公共无效暂停(){
super.onPause();
Log.d(“经济”、“暂停”);
}
公共void onStop(){
super.onStop();
Log.d(“经济”、“顶部”);
}
公共无效onDestroyView(){
super.onDestroyView();
Log.d(“经济”、“ondestroyview”);
}
公共图书馆