apis/view/OverscanActivity.java

/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * 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);
    }
}