Android Support V7官方Demo概览（一）

本文介绍了Action Bar、Action Bar Tabs、Action Mode、显示选项、Fragment添加到选项菜单、滚动时隐藏Action Bar、PreferenceActivity、SettingsActionProvider及ShareActionProvider组件的使用。

Action Bar Mechanics

演示了基本的Action Bar和怎样和标准的选项按钮交互。这个例子仅用于信息目的；对于使用Action Bar更常见的方法请查看ActionBarUsage示例。

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public class ActionBarMechanics extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        // The Action Bar is a window feature. The feature must be requested
        // before setting a content view. Normally this is set automatically
        // by your Activity's theme in your manifest. The provided system
        // theme Theme.WithActionBar enables this for you. Use it as you would
        // use Theme.NoTitleBar. You can add an Action Bar to your own themes
        // by adding the element <item name="android:windowActionBar">true</item>
        // to your style definition.
        supportRequestWindowFeature(WindowCompat.FEATURE_ACTION_BAR);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Menu items default to never show in the action bar. On most devices this means
        // they will show in the standard options menu panel when the menu button is pressed.
        // On xlarge-screen devices a "More" button will appear in the far right of the
        // Action Bar that will display remaining items in a cascading menu.
        menu.add("Normal item");

        MenuItem actionItem = menu.add("Action Button");

        // Items that show as actions should favor the "if room" setting, which will
        // prevent too many buttons from crowding the bar. Extra items will show in the
        // overflow area.
        MenuItemCompat.setShowAsAction(actionItem, MenuItemCompat.SHOW_AS_ACTION_IF_ROOM);

        // Items that show as actions are strongly encouraged to use an icon.
        // These icons are shown without a text description, and therefore should
        // be sufficiently descriptive on their own.
        actionItem.setIcon(android.R.drawable.ic_menu_share);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        Toast.makeText(this, "Selected Item: " + item.getTitle(), Toast.LENGTH_SHORT).show();
        return true;
    }
}

Action Bar Tabs

演示了Action Bar Tabs的使用和它们怎样和action bar的其它features交互。

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public void onAddTab(View v) {
    final ActionBar bar = getSupportActionBar();
    final int tabCount = bar.getTabCount();
    final String text = "Tab " + tabCount;
    bar.addTab(bar.newTab()
            .setText(text)
            .setTabListener(new TabListener(new TabContentFragment(text))));
}

public void onRemoveTab(View v) {
    final ActionBar bar = getSupportActionBar();
    if (bar.getTabCount() > 0) {
        bar.removeTabAt(bar.getTabCount() - 1);
    }
}

public void onToggleTabs(View v) {
    final ActionBar bar = getSupportActionBar();

    if (bar.getNavigationMode() == ActionBar.NAVIGATION_MODE_TABS) {
        bar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
    } else {
        bar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
    }
}

public void onRemoveAllTabs(View v) {
    getSupportActionBar().removeAllTabs();
}

/**
 * A TabListener receives event callbacks from the action bar as tabs
 * are deselected, selected, and reselected. A FragmentTransaction
 * is provided to each of these callbacks; if any operations are added
 * to it, it will be committed at the end of the full tab switch operation.
 * This lets tab switches be atomic without the app needing to track
 * the interactions between different tabs.
 *
 * NOTE: This is a very simple implementation that does not retain
 * fragment state of the non-visible tabs across activity instances.
 * Look at the FragmentTabs example for how to do a more complete
 * implementation.
 */
private class TabListener implements ActionBar.TabListener {
    private TabContentFragment mFragment;

    public TabListener(TabContentFragment fragment) {
        mFragment = fragment;
    }

    @Override
    public void onTabSelected(Tab tab, FragmentTransaction ft) {
        ft.add(R.id.fragment_content, mFragment, mFragment.getText());
    }

    @Override
    public void onTabUnselected(Tab tab, FragmentTransaction ft) {
        ft.remove(mFragment);
    }

    @Override
    public void onTabReselected(Tab tab, FragmentTransaction ft) {
        Toast.makeText(ActionBarTabs.this, "Reselected!", Toast.LENGTH_SHORT).show();
    }

}

Action Bar Usage

演示了Action Bar的常见用法。默认的Honeycomb主题（Android 3.0）默认情况下包含action bar和一个菜单资源用于填充菜单数据。如果你想看看这些是怎样工作的，可以查看ActionBarMechanics类。

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public class ActionBarUsage extends AppCompatActivity {
    TextView mSearchText;
    int mSortMode = -1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mSearchText = new TextView(this);
        setContentView(mSearchText);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.actions, menu);
        SearchView searchView = (SearchView) MenuItemCompat
                .getActionView(menu.findItem(R.id.action_search));
        searchView.setOnQueryTextListener(mOnQueryTextListener);
        return true;
    }

    @Override
    public boolean onPrepareOptionsMenu(Menu menu) {
        if (mSortMode != -1) {
            Drawable icon = menu.findItem(mSortMode).getIcon();
            menu.findItem(R.id.action_sort).setIcon(icon);
        }
        return super.onPrepareOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.action_sort_alpha:
            case R.id.action_sort_size:
                onSort(item);
                break;
        }

        Toast.makeText(this, "Selected Item: " + item.getTitle(), Toast.LENGTH_SHORT).show();

        return true;
    }

    private void onSort(MenuItem item) {
        mSortMode = item.getItemId();
        // Request a call to onPrepareOptionsMenu so we can change the sort icon
        supportInvalidateOptionsMenu();
    }

    // The following callbacks are called for the SearchView.OnQueryChangeListener
    // For more about using SearchView, see src/.../view/SearchView1.java and SearchView2.java
    private final SearchView.OnQueryTextListener mOnQueryTextListener =
            new SearchView.OnQueryTextListener() {
        @Override
        public boolean onQueryTextChange(String newText) {
            newText = TextUtils.isEmpty(newText) ? "" : "Query so far: " + newText;
            mSearchText.setText(newText);
            return true;
        }

        @Override
        public boolean onQueryTextSubmit(String query) {
            Toast.makeText(ActionBarUsage.this,
                    "Searching for: " + query + "...", Toast.LENGTH_SHORT).show();
            return true;
        }
    };
}

Action Mode

演示了action mode的常见用法。
菜单资源：

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<menu xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto">
    <item android:id="@+id/action_search"
          android:title="@string/action_bar_search"
          android:icon="@drawable/abc_ic_search_api_mtrl_alpha"
          app:showAsAction="ifRoom|collapseActionView"
          app:actionViewClass="android.support.v7.widget.SearchView" />
    <item android:id="@+id/action_add"
          android:icon="@android:drawable/ic_menu_add"
          android:title="@string/action_bar_add" />
    <item android:id="@+id/action_edit"
          android:icon="@android:drawable/ic_menu_edit"
          android:title="@string/action_bar_edit"
          app:showAsAction="always" />
    <item android:id="@+id/action_share"
          android:icon="@android:drawable/ic_menu_share"
          android:title="@string/action_bar_share"
          android:enabled="false"
          app:showAsAction="ifRoom" />
    <item android:id="@+id/action_sort"
          android:icon="@android:drawable/ic_menu_sort_by_size"
          android:title="@string/action_bar_sort"
          app:showAsAction="ifRoom">
        <menu>
            <item android:id="@+id/action_sort_size"
                  android:icon="@android:drawable/ic_menu_sort_by_size"
                  android:title="@string/action_bar_sort_size" />
            <item android:id="@+id/action_sort_alpha"
                  android:icon="@android:drawable/ic_menu_sort_alphabetically"
                  android:title="@string/action_bar_sort_alpha" />
        </menu>
    </item>
</menu>

相关代码

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private void startActionMode() {
    startSupportActionMode(new ActionMode.Callback() {
        @Override
        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
            mode.getMenuInflater().inflate(R.menu.actions, menu);
            return true;
        }

        @Override
        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
            return false;
        }

        @Override
        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
            Toast.makeText(ActionBarActionMode.this,
                    "Action Mode item clicked:" + item.getTitle(), Toast.LENGTH_SHORT).show();
            return true;
        }

        @Override
        public void onDestroyActionMode(ActionMode mode) {
        }
    });
}

Display Options

演示了Action Bar各个显示选项flags可以怎样被结合和它们的效果。

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public class ActionBarDisplayOptions extends AppCompatActivity
        implements View.OnClickListener, ActionBar.TabListener {
    private View mCustomView;
    private ActionBar.LayoutParams mCustomViewLayoutParams;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.action_bar_display_options);

        ...

        // Configure several action bar elements that will be toggled by display options.
        mCustomView = getLayoutInflater().inflate(R.layout.action_bar_display_options_custom, null);
        mCustomViewLayoutParams = new ActionBar.LayoutParams(
                LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);

        final ActionBar bar = getSupportActionBar();
        bar.setCustomView(mCustomView, mCustomViewLayoutParams);
        bar.addTab(bar.newTab().setText("Tab 1").setTabListener(this));
        bar.addTab(bar.newTab().setText("Tab 2").setTabListener(this));
        bar.addTab(bar.newTab().setText("Tab 3").setTabListener(this));

        final ArrayAdapter<String> listAdapter = new ArrayAdapter<String>(bar.getThemedContext(),
                R.layout.support_simple_spinner_dropdown_item,
                new String[] { "Item 1", "Item 2", "Item 3" });
        bar.setListNavigationCallbacks(listAdapter, new ActionBar.OnNavigationListener() {
            @Override
            public boolean onNavigationItemSelected(int itemPosition, long itemId) {
                Toast.makeText(ActionBarDisplayOptions.this,
                        listAdapter.getItem(itemPosition),
                        Toast.LENGTH_SHORT).show();
                return true;
            }
        });

        bar.setLogo(R.drawable.ic_media_play);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.display_options_actions, menu);
        return true;
    }

    @Override
    public boolean onSupportNavigateUp() {
        finish();
        return true;
    }

    @Override
    public void onClick(View v) {
        final ActionBar bar = getSupportActionBar();
        int flags = 0;
        switch (v.getId()) {
            case R.id.toggle_home_as_up:
                flags = ActionBar.DISPLAY_HOME_AS_UP;
                break;
            case R.id.toggle_show_home:
                flags = ActionBar.DISPLAY_SHOW_HOME;
                break;
            case R.id.toggle_use_logo:
                flags = ActionBar.DISPLAY_USE_LOGO;
                break;
            case R.id.toggle_show_title:
                flags = ActionBar.DISPLAY_SHOW_TITLE;
                break;
            case R.id.toggle_show_custom:
                flags = ActionBar.DISPLAY_SHOW_CUSTOM;
                break;
            case R.id.toggle_navigation:
                switch (bar.getNavigationMode()) {
                    case ActionBar.NAVIGATION_MODE_STANDARD:
                        bar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
                        break;
                    case ActionBar.NAVIGATION_MODE_TABS:
                        bar.setNavigationMode(ActionBar.NAVIGATION_MODE_LIST);
                        break;
                    case ActionBar.NAVIGATION_MODE_LIST:
                        bar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
                        break;
                }
                return;
            case R.id.cycle_custom_gravity: {
                ActionBar.LayoutParams lp = mCustomViewLayoutParams;
                int newGravity = 0;
                switch (lp.gravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
                    case Gravity.LEFT:
                        newGravity = Gravity.CENTER_HORIZONTAL;
                        break;
                    case Gravity.CENTER_HORIZONTAL:
                        newGravity = Gravity.RIGHT;
                        break;
                    case Gravity.RIGHT:
                        newGravity = Gravity.LEFT;
                        break;
                }
                lp.gravity = lp.gravity & ~Gravity.HORIZONTAL_GRAVITY_MASK | newGravity;
                bar.setCustomView(mCustomView, lp);
                return;
            }
            case R.id.toggle_visibility:
                if (bar.isShowing()) {
                    bar.hide();
                } else {
                    bar.show();
                }
                return;
        }

        int change = bar.getDisplayOptions() ^ flags;
        bar.setDisplayOptions(change, flags);
    }
    ...
}

Fragment Menu

演示了Fragment怎样加入到选项菜单中。共有三个fragment，MenuFragment包含Menu 1A和Menu 1B，Menu2Fragment包含Menu 2，Menu3Fragment嵌套在Menu2Fragment中，包含MENU ITEM。

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// Update fragment visibility based on current check box state.
void updateFragmentVisibility() {
    // Update top level fragments.
    FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
    if (mCheckBox1.isChecked()) ft.show(mFragment1);
    else ft.hide(mFragment1);
    if (mCheckBox2.isChecked()) ft.show(mFragment2);
    else ft.hide(mFragment2);
    ft.commit();

    mFragment1.setHasOptionsMenu(mHasOptionsMenu.isChecked());
    mFragment1.setMenuVisibility(mMenuVisibility.isChecked());
    mFragment2.setHasOptionsMenu(mHasOptionsMenu.isChecked());
    mFragment2.setMenuVisibility(mMenuVisibility.isChecked());

    // Update the nested fragment.
    if (mFragment2.mFragment3 != null) {
        ft = mFragment2.getFragmentManager().beginTransaction();
        if (mCheckBox3.isChecked()) ft.show(mFragment2.mFragment3);
        else ft.hide(mFragment2.mFragment3);
        ft.commit();

        mFragment2.mFragment3.setHasOptionsMenu(mHasOptionsMenu.isChecked());
        mFragment2.mFragment3.setMenuVisibility(mMenuVisibility.isChecked());
    }
}

/**
 * A fragment that displays a menu.  This fragment happens to not
 * have a UI (it does not implement onCreateView), but it could also
 * have one if it wanted.
 */
public static class MenuFragment extends Fragment {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setHasOptionsMenu(true);
    }

    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        MenuItemCompat.setShowAsAction(menu.add("Menu 1a"), MenuItem.SHOW_AS_ACTION_IF_ROOM);
        MenuItemCompat.setShowAsAction(menu.add("Menu 1b"), MenuItem.SHOW_AS_ACTION_IF_ROOM);
        super.onCreateOptionsMenu(menu, inflater);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        if (item.getTitle().equals("Menu 1a")) {
            Toast.makeText(getActivity(), "Selected Menu 1a.", Toast.LENGTH_SHORT).show();
            return true;
        }
        if (item.getTitle().equals("Menu 1b")) {
            Toast.makeText(getActivity(), "Selected Menu 1b.", Toast.LENGTH_SHORT).show();
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}

/**
 * Second fragment with a menu.
 */
public static class Menu2Fragment extends Fragment {
    Menu3Fragment mFragment3;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setHasOptionsMenu(true);

        FragmentManager fm = getChildFragmentManager();
        FragmentTransaction ft = fm.beginTransaction();
        mFragment3 = (Menu3Fragment)fm.findFragmentByTag("f3");
        if (mFragment3 == null) {
            mFragment3 = new Menu3Fragment();
            ft.add(mFragment3, "f3");
        }
        ft.commit();
    }

    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        MenuItemCompat.setShowAsAction(menu.add("Menu 2"), MenuItem.SHOW_AS_ACTION_IF_ROOM);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        if (item.getTitle().equals("Menu 2")) {
            Toast.makeText(getActivity(), "Selected Menu 2.", Toast.LENGTH_SHORT).show();
            return true;
        }
        return false;
    }
}

/**
 * Third fragment with a menu.
 * This one is nested within the second.
 */
public static class Menu3Fragment extends Fragment {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setHasOptionsMenu(true);
    }

    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        Toast.makeText(getActivity(), "Created nested fragment's menu.",
                Toast.LENGTH_SHORT).show();
        inflater.inflate(R.menu.display_options_actions, menu);
        super.onCreateOptionsMenu(menu, inflater);
    }

    @Override
    public void onDestroyOptionsMenu() {
        Toast.makeText(getActivity(), "Destroyed nested fragment's menu.",
                Toast.LENGTH_SHORT).show();
        super.onDestroyOptionsMenu();
    }

    @Override
    public void onPrepareOptionsMenu(Menu menu) {
        Toast.makeText(getActivity(), "Prepared nested fragment's menu.",
                Toast.LENGTH_SHORT).show();
        super.onPrepareOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        if (item.getItemId() == R.id.simple_item) {
            Toast.makeText(getActivity(), "Selected nested fragment's menu item.",
                    Toast.LENGTH_SHORT).show();
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}

Hide on Scroll

演示了Action Bar在内容滚动时隐藏的用法。

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@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // Hide on content scroll requires an overlay action bar, so request one
    supportRequestWindowFeature(WindowCompat.FEATURE_ACTION_BAR_OVERLAY);

    setContentView(R.layout.action_bar_hide_scroll);

    // Enable hide on scroll
    getSupportActionBar().setHideOnContentScrollEnabled(true);
}

Preferences

演示了怎样使用我们自己定义的AppCompat。在使用的时候直接继承我们自定义的AppCompat类就可以了。

AppCompatPreferenceActivity实现和代理了使用AppCompat必要的调用。这个技术可以用于Activity类，不只是PreferenceActivity。

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public abstract class AppCompatPreferenceActivity extends PreferenceActivity {

    private AppCompatDelegate mDelegate;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        getDelegate().installViewFactory();
        getDelegate().onCreate(savedInstanceState);
        super.onCreate(savedInstanceState);
    }

    @Override
    protected void onPostCreate(Bundle savedInstanceState) {
        super.onPostCreate(savedInstanceState);
        getDelegate().onPostCreate(savedInstanceState);
    }

    public ActionBar getSupportActionBar() {
        return getDelegate().getSupportActionBar();
    }

    public void setSupportActionBar(@Nullable Toolbar toolbar) {
        getDelegate().setSupportActionBar(toolbar);
    }

    @Override
    public MenuInflater getMenuInflater() {
        return getDelegate().getMenuInflater();
    }

    @Override
    public void setContentView(@LayoutRes int layoutResID) {
        getDelegate().setContentView(layoutResID);
    }

    @Override
    public void setContentView(View view) {
        getDelegate().setContentView(view);
    }

    @Override
    public void setContentView(View view, ViewGroup.LayoutParams params) {
        getDelegate().setContentView(view, params);
    }

    @Override
    public void addContentView(View view, ViewGroup.LayoutParams params) {
        getDelegate().addContentView(view, params);
    }

    @Override
    protected void onPostResume() {
        super.onPostResume();
        getDelegate().onPostResume();
    }

    @Override
    protected void onTitleChanged(CharSequence title, int color) {
        super.onTitleChanged(title, color);
        getDelegate().setTitle(title);
    }

    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        getDelegate().onConfigurationChanged(newConfig);
    }

    @Override
    protected void onStop() {
        super.onStop();
        getDelegate().onStop();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        getDelegate().onDestroy();
    }

    public void invalidateOptionsMenu() {
        getDelegate().invalidateOptionsMenu();
    }

    private AppCompatDelegate getDelegate() {
        if (mDelegate == null) {
            mDelegate = AppCompatDelegate.create(this, null);
        }
        return mDelegate;
    }
}

Settings Action Provider

演示了怎样实现一个ActionProvider在Action Bar上添加功能。尤其是这个示例创建了一个ActionProvider调起系统设置并且使用provider添加一个菜单item。

菜单资源：

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<menu xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto">
    <item android:id="@+id/menu_item_action_provider_action_bar"
        android:title="@string/action_bar_settings"
        app:showAsAction="ifRoom"
        app:actionProviderClass="com.example.android.supportv7.app.ActionBarSettingsActionProviderActivity$SettingsActionProvider"/>

    <item android:id="@+id/menu_item_action_provider_overflow"
        android:title="@string/action_bar_settings"
        app:showAsAction="never"
        app:actionProviderClass="com.example.android.supportv7.app.ActionBarSettingsActionProviderActivity$SettingsActionProvider"/>
</menu>

SettingsActionProvider类代码：

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public static class SettingsActionProvider extends ActionProvider {
    /** An intent for launching the system settings. */
    private static final Intent sSettingsIntent = new Intent(Settings.ACTION_SETTINGS);

    /**
     * Creates a new instance.
     *
     * @param context Context for accessing resources.
     */
    public SettingsActionProvider(Context context) {
        super(context);
    }

    @Override
    public View onCreateActionView() {
        // Inflate the action view to be shown on the action bar.
        LayoutInflater layoutInflater = LayoutInflater.from(getContext());
        View view = layoutInflater.inflate(R.layout.action_bar_settings_action_provider, null);
        ImageButton button = (ImageButton) view.findViewById(R.id.button);
        // Attach a click listener for launching the system settings.
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                getContext().startActivity(sSettingsIntent);
            }
        });
        return view;
    }

    @Override
    public boolean onPerformDefaultAction() {
        // This is called if the host menu item placed in the overflow menu of the
        // action bar is clicked and the host activity did not handle the click.
        getContext().startActivity(sSettingsIntent);
        return true;
    }
}

ShareActionProvider

演示了怎样在Action Bar上使用ShareActionProvider。

菜单资源：

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<menu xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto">

    <item android:id="@+id/menu_item_share_provider_action_bar"
        android:title="@string/action_bar_share"
        app:showAsAction="ifRoom"
        app:actionProviderClass="android.support.v7.widget.ShareActionProvider"/>

</menu>

ActionBarShareActionProvider类代码：

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@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.action_bar_share_action_provider, menu);
    return true;
}

@Override
protected boolean onPrepareOptionsPanel(View view, Menu menu) {
    final ShareActionProvider sap = (ShareActionProvider) MenuItemCompat.getActionProvider(
            menu.findItem(R.id.menu_item_share_provider_action_bar));

    final Intent shareIntent = new Intent(Intent.ACTION_SEND);
    shareIntent.setType("text/plain");
    shareIntent.putExtra(Intent.EXTRA_TEXT, "Hello!");

    sap.setShareIntent(shareIntent);

    return true;
}

从Android SDK目录可找到源码，或从这里下载

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tag:

    缺失模块。
    1、请确保node版本大于6.2
    2、在博客根目录（注意不是yilia根目录）执行以下命令：
    npm i hexo-generator-json-content --save

    3、在根目录_config.yml里添加配置： 

      jsonContent:
    meta: false
    pages: false
    posts:
      title: true
      date: true
      path: true
      text: false
      raw: false
      content: false
      slug: false
      updated: false
      comments: false
      link: false
      permalink: false
      excerpt: false
      categories: false
      tags: true

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