Add drawer with state information

platform_tools/android/apps/viewer/src/main/java/org/skia/viewer/ViewerActivity.java

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 package org.skia.viewer;
 
 import android.app.Activity;
+import android.content.res.Configuration;
 import android.os.Bundle;
-import android.util.Log;
-import android.view.GestureDetector;
+import android.support.v4.widget.DrawerLayout;
+import android.support.v7.app.ActionBarDrawerToggle;
 import android.view.KeyEvent;
 import android.view.Menu;
 import android.view.MenuInflater;
 import android.view.MenuItem;
 import android.view.MotionEvent;
 import android.view.Surface;
 import android.view.SurfaceHolder;
 import android.view.SurfaceView;
 import android.view.View;
+import android.widget.ListView;
 
 public class ViewerActivity
         extends Activity implements SurfaceHolder.Callback, View.OnTouchListener {
     private static final float FLING_VELOCITY_THRESHOLD = 1000;
 
+    private DrawerLayout mDrawerLayout;
+    private ActionBarDrawerToggle mDrawerToggle;
+    private ListView mDrawerList;
+    private StateAdapter mStateAdapter;
+
     private SurfaceView mView;
     private ViewerApplication mApplication;
 
     private native void onSurfaceCreated(long handle, Surface surface);
     private native void onSurfaceChanged(long handle, Surface surface);
     private native void onSurfaceDestroyed(long handle);
     private native void onKeyPressed(long handle, int keycode);
     private native void onTouched(long handle, int owner, int state, float x, float y);
+    private native void onUIStateChanged(long handle, String stateName, String stateValue);
 
     @Override
     public boolean onCreateOptionsMenu(Menu menu) {
         MenuInflater inflater = getMenuInflater();
         inflater.inflate(R.menu.title, menu);
         return true;
     }
 
     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
+        // Pass the event to ActionBarDrawerToggle, if it returns
+        // true, then it has handled the app icon touch event
+        if (mDrawerToggle.onOptionsItemSelected(item)) {
+            return true;
+        }
+
         switch (item.getItemId()) {
             case R.id.action_left:
                 onKeyPressed(mApplication.getNativeHandle(), KeyEvent.KEYCODE_SOFT_LEFT);
                 return true;
             case R.id.action_right:
                 onKeyPressed(mApplication.getNativeHandle(), KeyEvent.KEYCODE_SOFT_RIGHT);
                 return true;
             default:
                 return super.onOptionsItemSelected(item);
         }
     }
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
 
-        mApplication = (ViewerApplication) getApplication();
-        mApplication.setViewerActivity(this);
         mView = (SurfaceView) findViewById(R.id.surfaceView);
         mView.getHolder().addCallback(this);
 
         mView.setOnTouchListener(this);
+
+        mDrawerLayout = (DrawerLayout) findViewById(R.id.drawerLayout);
+        mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
+                R.string.drawer_open, R.string.drawer_close);
+        mDrawerLayout.addDrawerListener(mDrawerToggle);
+        getActionBar().setDisplayHomeAsUpEnabled(true);
+        getActionBar().setHomeButtonEnabled(true);
+
+        mDrawerList = (ListView) findViewById(R.id.leftDrawer);
+        mStateAdapter = new StateAdapter(this);
+        mDrawerList.setAdapter(mStateAdapter);
+
+        mApplication = (ViewerApplication) getApplication();
+        mApplication.setViewerActivity(this);
     }
 
     @Override
+    protected void onPostCreate(Bundle savedInstanceState) {
+        super.onPostCreate(savedInstanceState);
+        mDrawerToggle.syncState();
+    }
+
+    @Override
+    public void onConfigurationChanged(Configuration newConfig) {
+        super.onConfigurationChanged(newConfig);
+        mDrawerToggle.onConfigurationChanged(newConfig);
+    }
+
+    @Override
     protected void onDestroy() {
         mApplication.setViewerActivity(null);
         super.onDestroy();
     }
 
     @Override
     public void surfaceCreated(SurfaceHolder holder) {
         if (mApplication.getNativeHandle() != 0) {
             onSurfaceCreated(mApplication.getNativeHandle(), holder.getSurface());
         }
@@ skipping 18 matching lines @@
         int count = event.getPointerCount();
         for (int i = 0; i < count; i++) {
             final float x = event.getX(i);
             final float y = event.getY(i);
             final int owner = event.getPointerId(i);
             int action = event.getAction() & MotionEvent.ACTION_MASK;
             onTouched(mApplication.getNativeHandle(), owner, action, x, y);
         }
         return true;
     }
+
+    public void setState(String stateJson) {
+        mStateAdapter.setState(stateJson);
+    }
+
+    public void onStateChanged(String stateName, String stateValue) {
+        onUIStateChanged(mApplication.getNativeHandle(), stateName, stateValue);
+    }
 }