Android设置系统UI可见性
/**
* Activity演示了使用系统用户界面UI来实现内容浏览器风格的用户界面（如阅读器界面）。
*
* @description：
* @author ldm
* @date 2016-5-24 下午4:03:51
*/
@SuppressWarnings("deprecation")
public class ContentBrowserActivity extends Activity implements
OnQueryTextListener, ActionBar.TabListener {
private Content mContent;
/**
* 自定义ScrollView,管理系统UI
*
* @description：View.OnSystemUiVisibilityChangeListener注册监听器来监听系统UI可见性的变化
* @author ldm
* @date 2016-5-24 下午3:43:21
*/
public static class Content extends ScrollView implements
View.OnSystemUiVisibilityChangeListener, View.OnClickListener {
private TextView mText;
private TextView mTitleView;
private SeekBar mSeekView;
// SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN:Activity全屏显示，但状态栏不会被隐藏覆盖，状态栏依然可见，Activity顶端布局部分会被状态遮住。
int mBaseSystemUiVisibility = SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
| SYSTEM_UI_FLAG_LAYOUT_STABLE;// SYSTEM_UI_FLAG_LAYOUT_STABLE:防止系统栏隐藏时内容区域大小发生变化
int mLastSystemUiVis;
Runnable mNavHider = new Runnable() {
@Override
public void run() {
setNavVisibility(false);
}
};
public Content(Context context, AttributeSet attrs) {
super(context, attrs);
mText = new TextView(context);
mText.setTextSize(TypedValue.COMPLEX_UNIT_DIP, 16);
mText.setText(context
.getString(R.string.alert_dialog_two_buttons2ultra_msg));
mText.setClickable(false);
mText.setOnClickListener(this);
mText.setTextIsSelectable(true);
// 给ScrollView中添加子控件
addView(mText, new ViewGroup.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.WRAP_CONTENT));
// 设置系统 UI可见性变化监听
setOnSystemUiVisibilityChangeListener(this);
}
/**
* 初始化标题及SeekBar拖动条
*
* @description：
* @author ldm
* @date 2016-5-24 下午4:00:37
*/
public void init(TextView title, SeekBar seek) {
mTitleView = title;
mSeekView = seek;
// 设置状态栏可见
setNavVisibility(true);
}
@Override
public void onSystemUiVisibilityChange(int visibility) {
int diff = mLastSystemUiVis ^ visibility;
mLastSystemUiVis = visibility;
if ((diff & SYSTEM_UI_FLAG_LOW_PROFILE) != 0
&& (visibility & SYSTEM_UI_FLAG_LOW_PROFILE) == 0) {
// 设置导状态栏可见
setNavVisibility(true);
}
}
// 当窗口中包含的可见的view发生变化时触发。
@Override
protected void onWindowVisibilityChanged(int visibility) {
super.onWindowVisibilityChanged(visibility);
setNavVisibility(true);
getHandler().postDelayed(mNavHider, 2000);
}
@Override
protected void onScrollChanged(int l, int t, int oldl, int oldt) {
super.onScrollChanged(l, t, oldl, oldt);
// 滚动过程中，状态栏隐藏
setNavVisibility(false);
}
@Override
public void onClick(View v) {
// 当用户点击 操作时，进行状态栏设置
int curVis = getSystemUiVisibility();
setNavVisibility((curVis & SYSTEM_UI_FLAG_LOW_PROFILE) != 0);
}
void setBaseSystemUiVisibility(int visibility) {
mBaseSystemUiVisibility = visibility;
}
void setNavVisibility(boolean visible) {
int newVis = mBaseSystemUiVisibility;
if (!visible) {
// SYSTEM_UI_FLAG_LOW_PROFILE:状态栏显示处于低能显示状态(low
// profile模式)，状态栏上一些图标显示会被隐藏。
// SYSTEM_UI_FLAG_FULLSCREEN：Activity全屏显示，且状态栏被隐藏覆盖掉。
newVis |= SYSTEM_UI_FLAG_LOW_PROFILE
| SYSTEM_UI_FLAG_FULLSCREEN;
}
// 获取状态栏当前可见性
final boolean changed = newVis == getSystemUiVisibility();
if (changed || visible) {
Handler h = getHandler();
if (h != null) {
h.removeCallbacks(mNavHider);
}
}
// 设置可见性
setSystemUiVisibility(newVis);
mTitleView.setVisibility(visible ? VISIBLE : INVISIBLE);
mSeekView.setVisibility(visible ? VISIBLE : INVISIBLE);
}
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// 标题栏显示在内容上面
getWindow().requestFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
setContentView(R.layout.content_browser);
mContent = (Content) findViewById(R.id.content);
mContent.init((TextView) findViewById(R.id.title),
(SeekBar) findViewById(R.id.seekbar));
// 添加Tab
ActionBar bar = getActionBar();
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));
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.content_actions, menu);
//搜索功能
SearchView searchView = (SearchView) menu.findItem(R.id.action_search)
.getActionView();
searchView.setOnQueryTextListener(this);
MenuItem actionItem = menu
.findItem(R.id.menu_item_share_action_provider_action_bar);
ShareActionProvider actionProvider = (ShareActionProvider) actionItem
.getActionProvider();
actionProvider
.setShareHistoryFileName(ShareActionProvider.DEFAULT_SHARE_HISTORY_FILE_NAME);
// 分享操作
Intent shareIntent = new Intent(Intent.ACTION_SEND);
shareIntent.setType("image/*");
Uri uri = Uri.fromFile(getFileStreamPath("shared.png"));
shareIntent.putExtra(Intent.EXTRA_STREAM, uri);
actionProvider.setShareIntent(shareIntent);
return true;
}
@Override
public void onAttachedToWindow() {
super.onAttachedToWindow();
}
@Override
protected void onResume() {
super.onResume();
}
/**
* 对菜单项目进行操作
*/
@SuppressLint("InlinedApi")
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.show_tabs://显示ActionBar
getActionBar().setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
item.setChecked(true);
return true;
case R.id.hide_tabs://隐藏ActionBar
getActionBar()
.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
item.setChecked(true);
return true;
case R.id.stable_layout://设置状态栏是否保持可见状态
item.setChecked(!item.isChecked());
mContent.setBaseSystemUiVisibility(item.isChecked() ? View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
| View.SYSTEM_UI_FLAG_LAYOUT_STABLE
: View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
return true;
}
return false;
}
@Override
public boolean onQueryTextChange(String newText) {
return true;
}
@Override
public boolean onQueryTextSubmit(String query) {
Toast.makeText(this, "Searching for: " + query + "...",
Toast.LENGTH_SHORT).show();
return true;
}
@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
}
@Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
}
@Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
}
}
主页面布局：
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<view
android:id="@+id/content"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.example.android.apis.view.ContentBrowserActivity$Content" />
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:animateLayoutChanges="true"
android:fitsSystemWindows="true" >
<TextView
android:id="@+id/title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="top|center_horizontal"
android:background="#c0ffffff"
android:gravity="center"
android:padding="16dp"
android:text="A title goes here"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textColor="#ff000000" />
<SeekBar
android:id="@+id/seekbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom|center_horizontal"
android:layout_marginBottom="16dp" />
FrameLayout>
FrameLayout>详细的菜单布局等文件可以参考：
https://github.com/ldm520/ANDROID_API_DEMOS等Android官方API开源代码。