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Apache License
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package com.rching.intelligentcommunity; // www . j av a 2s . com import android.annotation.TargetApi; import android.app.Activity; import android.graphics.Bitmap; import android.graphics.Canvas; import android.graphics.Paint; import android.graphics.Rect; import android.graphics.RectF; import android.graphics.drawable.BitmapDrawable; import android.support.annotation.DimenRes; import android.support.v7.app.ActionBarActivity; import android.support.v7.app.ActionBar; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.content.Context; import android.os.Build; import android.os.Bundle; import android.util.FloatMath; import android.util.Log; import android.view.Gravity; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.support.v4.widget.DrawerLayout; import android.view.ViewTreeObserver; import android.widget.ArrayAdapter; import android.widget.FrameLayout; import android.widget.ImageView; import android.widget.ListView; import android.widget.TextView; import com.rching.intelligentcommunity.utils.ImageUtils; public class HomeActivity extends ActionBarActivity implements NavigationDrawerFragment.NavigationDrawerCallbacks { /** * Fragment managing the behaviors, interactions and presentation of the navigation drawer. */ private NavigationDrawerFragment mNavigationDrawerFragment; /** * Used to store the last screen title. For use in {@link #restoreActionBar()}. */ private CharSequence mTitle; private float slideMenuWidth; private ListView listView; private FrameLayout view; private Bitmap bitmap; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_home); mNavigationDrawerFragment = (NavigationDrawerFragment) getSupportFragmentManager().findFragmentById(R.id.navigation_drawer); mTitle = getTitle(); slideMenuWidth = getResources().getDimension(R.dimen.navigation_drawer_width); view = (FrameLayout) findViewById(R.id.container); // Set up the drawer. mNavigationDrawerFragment.setUp( R.id.navigation_drawer, (DrawerLayout) findViewById(R.id.drawer_layout)); listView = (ListView) mNavigationDrawerFragment.getActivity().findViewById(R.id.menu_list); mNavigationDrawerFragment.getView().getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() { @Override public boolean onPreDraw() { if (bitmap == null) { view.buildDrawingCache(); bitmap = view.getDrawingCache(); } int[] location = new int[2]; mNavigationDrawerFragment.getView().getLocationInWindow(location); blur(bitmap, listView, location[0]);//????x???? return true; } }); } private void blur(Bitmap bkg, View view,int width) { float scaleFactor = 4; float radius = 2; Bitmap overlay = Bitmap.createBitmap((int) (view.getMeasuredWidth()/scaleFactor), (int) (view.getMeasuredHeight()/scaleFactor), Bitmap.Config.ARGB_8888); Canvas canvas = new Canvas(overlay); canvas.translate(-view.getLeft()/scaleFactor, -view.getTop()/scaleFactor); canvas.scale(1 / scaleFactor, 1 / scaleFactor); Paint paint = new Paint(); paint.setFlags(Paint.FILTER_BITMAP_FLAG); float visibleWidth = slideMenuWidth +width; int visibleHeight = view.getHeight(); Rect src = new Rect(0,0, (int)(visibleWidth)+10, visibleHeight);//?view??????????? RectF dest = new RectF(-width - 10, 0, slideMenuWidth, visibleHeight);//??Drawer????? canvas.drawBitmap(bkg, src, dest, paint); overlay = ImageUtils.doBlur(overlay, (int)radius, true);//????????? if (Build.VERSION.SDK_INT < 16) { view.setBackgroundDrawable(new BitmapDrawable(getResources(), overlay)); } else { view.setBackground(new BitmapDrawable(getResources(), overlay)); } } @Override protected void onResume() { super.onResume(); } @Override public void onNavigationDrawerItemSelected(int position) { // update the main content by replacing fragments FragmentManager fragmentManager = getSupportFragmentManager(); fragmentManager.beginTransaction() .replace(R.id.container, PlaceholderFragment.newInstance(position + 1)) .commit(); } public void onSectionAttached(int number) { switch (number) { case 1: mTitle = getString(R.string.title_section1); break; case 2: mTitle = getString(R.string.title_section2); break; case 3: mTitle = getString(R.string.title_section3); break; } } public void restoreActionBar() { ActionBar actionBar = getSupportActionBar(); actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD); actionBar.setDisplayShowTitleEnabled(true); actionBar.setTitle(mTitle); } @Override public boolean onCreateOptionsMenu(Menu menu) { if (!mNavigationDrawerFragment.isDrawerOpen()) { // Only show items in the action bar relevant to this screen // if the drawer is not showing. Otherwise, let the drawer // decide what to show in the action bar. getMenuInflater().inflate(R.menu.home, menu); restoreActionBar(); return true; } return super.onCreateOptionsMenu(menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } /** * A placeholder fragment containing a simple view. */ public static class PlaceholderFragment extends Fragment { /** * The fragment argument representing the section number for this * fragment. */ private static final String ARG_SECTION_NUMBER = "section_number"; /** * Returns a new instance of this fragment for the given section * number. */ public static PlaceholderFragment newInstance(int sectionNumber) { PlaceholderFragment fragment = new PlaceholderFragment(); Bundle args = new Bundle(); args.putInt(ARG_SECTION_NUMBER, sectionNumber); fragment.setArguments(args); return fragment; } public PlaceholderFragment() { } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.fragment_home, container, false); return rootView; } @Override public void onAttach(Activity activity) { super.onAttach(activity); ((HomeActivity) activity).onSectionAttached( getArguments().getInt(ARG_SECTION_NUMBER)); } } }