The file containing the source code shown below is located in the corresponding directory in <sdk>/samples/android-<version>/...
/*
* Copyright (C) 2011 The Android开源工程
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.example.android.apis.view;
import android.app.ActionBar;
import android.app.Activity;
import android.app.FragmentTransaction;
import android.app.ActionBar.Tab;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.view.ActionMode;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.view.WindowManager;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.ImageView;
import android.widget.SearchView;
import android.widget.ShareActionProvider;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.SearchView.OnQueryTextListener;
import com.example.android.apis.R;
/**
* This activity demonstrates some of the available ways to reduce the size or visual contrast of
* the system decor, in order to better focus the user's attention or use available screen real
* estate on the task at hand.
*/
public class OverscanActivity extends Activity
implements OnQueryTextListener, ActionBar.TabListener {
public static class IV extends ImageView implements View.OnSystemUiVisibilityChangeListener {
private OverscanActivity mActivity;
private ActionMode mActionMode;
public IV(Context context) {
super(context);
}
public IV(Context context, AttributeSet attrs) {
super(context, attrs);
}
public void setActivity(OverscanActivity act) {
setOnSystemUiVisibilityChangeListener(this);
mActivity = act;
}
@Override
public void onSizeChanged(int w, int h, int oldw, int oldh) {
mActivity.refreshSizes();
}
@Override
public void onSystemUiVisibilityChange(int visibility) {
mActivity.updateCheckControls();
mActivity.refreshSizes();
}
private class MyActionModeCallback implements ActionMode.Callback {
@Override public boolean onCreateActionMode(ActionMode mode, Menu menu) {
mode.setTitle("My Action Mode!");
mode.setSubtitle(null);
mode.setTitleOptionalHint(false);
menu.add("Sort By Size").setIcon(android.R.drawable.ic_menu_sort_by_size);
menu.add("Sort By Alpha").setIcon(android.R.drawable.ic_menu_sort_alphabetically);
return true;
}
@Override public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
return true;
}
@Override public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
return true;
}
@Override public void onDestroyActionMode(ActionMode mode) {
mActionMode = null;
mActivity.clearActionMode();
}
}
public void startActionMode() {
if (mActionMode == null) {
ActionMode.Callback cb = new MyActionModeCallback();
mActionMode = startActionMode(cb);
}
}
public void stopActionMode() {
if (mActionMode != null) {
mActionMode.finish();
}
}
}
private void setFullscreen(boolean on) {
Window win = getWindow();
WindowManager.LayoutParams winParams = win.getAttributes();
final int bits = WindowManager.LayoutParams.FLAG_FULLSCREEN;
if (on) {
winParams.flags |= bits;
} else {
winParams.flags &= ~bits;
}
win.setAttributes(winParams);
}
private String getDisplaySize() {
DisplayMetrics dm = getResources().getDisplayMetrics();
return String.format("DisplayMetrics = (%d x %d)", dm.widthPixels, dm.heightPixels);
}
private String getViewSize() {
return String.format("View = (%d,%d - %d,%d)",
mImage.getLeft(), mImage.getTop(),
mImage.getRight(), mImage.getBottom());
}
void refreshSizes() {
mMetricsText.setText(getDisplaySize() + " " + getViewSize());
}
static int TOAST_LENGTH = 500;
IV mImage;
CheckBox[] mCheckControls = new CheckBox[6];
int[] mCheckFlags = new int[] { View.SYSTEM_UI_FLAG_LOW_PROFILE,
View.SYSTEM_UI_FLAG_FULLSCREEN, View.SYSTEM_UI_FLAG_HIDE_NAVIGATION,
View.SYSTEM_UI_FLAG_LAYOUT_STABLE, View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN,
View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
};
TextView mMetricsText;
public OverscanActivity() {
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().requestFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
setContentView(R.layout.overscan);
mImage = (IV) findViewById(R.id.image);
mImage.setActivity(this);
CompoundButton.OnCheckedChangeListener checkChangeListener
= new CompoundButton.OnCheckedChangeListener() {
@Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
updateSystemUi();
}
};
mCheckControls[0] = (CheckBox) findViewById(R.id.modeLowProfile);
mCheckControls[1] = (CheckBox) findViewById(R.id.modeFullscreen);
mCheckControls[2] = (CheckBox) findViewById(R.id.modeHideNavigation);
mCheckControls[3] = (CheckBox) findViewById(R.id.layoutStable);
mCheckControls[4] = (CheckBox) findViewById(R.id.layoutFullscreen);
mCheckControls[5] = (CheckBox) findViewById(R.id.layoutHideNavigation);
for (int i=0; i<mCheckControls.length; i++) {
mCheckControls[i].setOnCheckedChangeListener(checkChangeListener);
}
((CheckBox) findViewById(R.id.windowFullscreen)).setOnCheckedChangeListener(
new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
setFullscreen(isChecked);
}
}
);
((CheckBox) findViewById(R.id.windowHideActionBar)).setOnCheckedChangeListener(
new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked) {
getActionBar().hide();
} else {
getActionBar().show();
}
}
}
);
((CheckBox) findViewById(R.id.windowActionMode)).setOnCheckedChangeListener(
new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked) {
mImage.startActionMode();
} else {
mImage.stopActionMode();
}
}
}
);
mMetricsText = (TextView) findViewById(R.id.metricsText);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.content_actions, menu);
SearchView searchView = (SearchView) menu.findItem(R.id.action_search).getActionView();
searchView.setOnQueryTextListener(this);
// Set file with share history to the provider and set the share intent.
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);
// Note that you can set/change the intent any time,
// say when the user has selected an image.
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() {
updateCheckControls();
}
@Override
protected void onResume() {
super.onResume();
}
public void onSort(MenuItem item) {
}
@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 boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.show_tabs:
getActionBar().setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
item.setChecked(true);
return true;
case R.id.hide_tabs:
getActionBar().setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
item.setChecked(true);
return true;
}
return false;
}
@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
}
@Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
}
@Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
}
public void updateCheckControls() {
int visibility = mImage.getSystemUiVisibility();
for (int i=0; i<mCheckControls.length; i++) {
mCheckControls[i].setChecked((visibility&mCheckFlags[i]) != 0);
}
}
public void updateSystemUi() {
int visibility = 0;
for (int i=0; i<mCheckControls.length; i++) {
if (mCheckControls[i].isChecked()) {
visibility |= mCheckFlags[i];
}
}
mImage.setSystemUiVisibility(visibility);
}
public void clearActionMode() {
((CheckBox) findViewById(R.id.windowActionMode)).setChecked(false);
}
}