Android Open Source - arcgis-runtime-samples-android Main Activity

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Apache License
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Java Source Code

/* Copyright 2014 ESRI
 *//from   ww  w  . ja v  a 2  s .c  o m
 * All rights reserved under the copyright laws of the United States
 * and applicable international laws, treaties, and conventions.
 *
 * You may freely redistribute and use this sample code, with or
 * without modification, provided you include the original copyright
 * notice and use restrictions.
 *
 * See the Sample code usage restrictions document for further information.
 *
 */

package com.arcgis.android.samples.localdata.localrasterdata;

import java.io.File;
import java.io.FileNotFoundException;

import android.os.Bundle;
import android.os.Environment;
import android.support.v4.app.FragmentActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;

import com.arcgis.android.samples.localdata.localrasterdata.FileBrowserFragment.OnFileAndFolderFinishListener;
import com.arcgis.android.samples.localdata.localrasterdata.FileBrowserFragment.RasterLayerAction;
import com.esri.android.map.Layer;
import com.esri.android.map.MapView;
import com.esri.android.map.RasterLayer;
import com.esri.android.map.ags.ArcGISTiledMapServiceLayer;
import com.esri.android.map.event.OnStatusChangedListener;
import com.esri.core.geometry.Envelope;
import com.esri.core.raster.FileRasterSource;
import com.esri.core.renderer.BlendRenderer;
import com.esri.core.renderer.HillshadeRenderer;
import com.esri.core.renderer.RGBRenderer;
import com.esri.core.renderer.RasterRenderer;
import com.esri.core.renderer.StretchParameters;
import com.esri.core.renderer.StretchParameters.ClipStretchParameters;
import com.esri.core.renderer.StretchParameters.StdDevStretchParameters;
import com.esri.core.renderer.StretchRenderer;

public class MainActivity extends FragmentActivity implements
    OnFileAndFolderFinishListener, OnDialogDismissListener {

  private MapView mMapView;
  private String mElevationSourcePath = null;
  private String mInitDir = Environment.getExternalStorageDirectory()
      .getPath();

    // The extent of a Raster Layer, use to set the extent when raster layer loads
    Envelope mRasterLayerExtent = null;

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // Create a map view.
    mMapView = new MapView(this);
    // Add streets basemap
    mMapView.addLayer(new ArcGISTiledMapServiceLayer(
        getResources().getString(R.string.basemap_url)));
    setContentView(mMapView);

    // Set a Listener for map status changes
    // This will be called when adding raster layers as operational layers
    mMapView.setOnStatusChangedListener(new OnStatusChangedListener() {
        @Override
        public void onStatusChanged(Object source, STATUS status) {
      // Set the map extent once the map has been initialized and a raster layer
      // is added or changed; this will be indicated by the source being of type
      // RasterLayer and the initialization of the raster layer.
      if(source instanceof RasterLayer && STATUS.LAYER_LOADED == status){
        mMapView.setExtent(mRasterLayerExtent, 2);
      }
        }
    });

  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    this.getMenuInflater().inflate(R.menu.main_menu, menu);
    return true;
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {

    switch (item.getItemId()) {
    case R.id.menu_layer_raster:
      openFileBrowser();
      return true;
    case R.id.menu_renderer_blend:
      changeBlendRenderer();
      return true;
    case R.id.menu_renderer_hillshade:
      changeHillshadeRenderer();
      return true;
    case R.id.menu_renderer_rgb:
      changeRGBRenderer();
      return true;
    case R.id.menu_renderer_stretch:
      changeStretchRenderer();
      return true;
    }

    return false;
  }

  @Override
  public boolean onPrepareOptionsMenu(Menu menu) {
    for (int i = 0; i < menu.size(); i++) {
      MenuItem item = menu.getItem(i);
      if ((item.getItemId() == R.id.menu_layer_raster)
          || (item.getItemId() == R.id.menu_renderer)) {
        item.setVisible(true);
      } else if ((item.getItemId() == R.id.menu_dir_up)
          || (item.getItemId() == R.id.menu_dir_select)) {
        item.setVisible(false);
      }
    }
    return true;
  }

  @Override
  // Handle the click event for the "ok" button in the dialog to input
  // parameters for raster renderer.
  public void onPositiveClicked(RasterRenderer renderer) {
    if (mMapView == null || !mMapView.isLoaded()) {
      return;
    }

    // Set renderer for raster layer
    Layer[] layers = mMapView.getLayers();
    for (Layer layer : layers) {
      if (layer instanceof RasterLayer) {
        RasterLayer rastLayer = (RasterLayer) layer;
        try {
          if (renderer instanceof BlendRenderer) {
            BlendRenderer blendRenderer = (BlendRenderer) renderer;
            blendRenderer.setElevationSource(new FileRasterSource(mElevationSourcePath));
            rastLayer.setRenderer(blendRenderer);
          } else {
            rastLayer.setRenderer(renderer);
          }
        } catch (Exception e) {
          e.printStackTrace();
        }
      }
    }
  }

  @Override
  // Handle the event when a file is tapped in the file browser
  public void onFileFinish(String path, RasterLayerAction action) {
    // Dismiss file browser and refresh actionbar.
    this.getSupportFragmentManager().popBackStack();
    this.invalidateOptionsMenu();
    // Use the current path as the initial directory next time opening the
    // file bowser.
    File tempFile = new File(path);
    if (tempFile.isFile()) {
      mInitDir = tempFile.getParent();
    } else {
      mInitDir = tempFile.getPath();
    }

    addRasterLayer(path, action);
  }

  @Override
  public void onDirectoryFinish(String path) {

  }

  @Override
  protected void onPause() {
    super.onPause();
    mMapView.pause();
  }

  @Override
  protected void onResume() {
    super.onResume();
    mMapView.unpause();
  }

  private RasterLayer initRasterLayer(String rasterPath, boolean asOperationalLayer) {
    RasterLayer rastLayer = null;
    if ((mMapView == null) || (!mMapView.isLoaded())) {
      return null;
    }
    
    try {
      FileRasterSource rasterSource = new FileRasterSource(rasterPath);
      if (asOperationalLayer) {
        rasterSource.project(mMapView.getSpatialReference());
      }
      
      rastLayer = new RasterLayer(rasterSource);
    } catch (IllegalArgumentException ie) {
      Toast.makeText(this, "null or empty path", Toast.LENGTH_SHORT).show();
    } catch (FileNotFoundException fe) {
      Toast.makeText(this, "raster file doesn't exist", Toast.LENGTH_SHORT).show();
    } catch (RuntimeException re) {
      Toast.makeText(this, "unsupported raster file", Toast.LENGTH_SHORT).show();
    }

    return rastLayer;
  }
  
  private void loadRasterLayerAsBaseMapLayer(String rasterPath) {
    RasterLayer rastLayer = initRasterLayer(rasterPath, false);
    if ((rastLayer == null) || (!rastLayer.isInitialized())) {
      return;
    }
    
    reset();
    mMapView.removeAll();
    mMapView.recycle();
    mMapView = new MapView(this);
    mMapView.addLayer(rastLayer);

    setContentView(mMapView);
  }

  private void loadRasterLayerAsOperationalLayer(String rasterPath) {
    RasterLayer rastLayer = initRasterLayer(rasterPath, true);
    if ((rastLayer == null) || (!rastLayer.isInitialized())) {
      return;
    }

    mMapView.addLayer(rastLayer);
    // set extent to raster layer
    mRasterLayerExtent = rastLayer.getFullExtent();

  }
  
  private void addRasterLayer(String rasterPath, RasterLayerAction action) {
    if (rasterPath == null || rasterPath.length() <= 0) {
      Toast.makeText(this, "Invalid path", Toast.LENGTH_LONG).show();
      return;
    }

    switch (action) {
    case BASEMAP_LAYER:
      loadRasterLayerAsBaseMapLayer(rasterPath);
      break;
    case OPERATIONAL_LAYER:
      loadRasterLayerAsOperationalLayer(rasterPath);
      break;
    case ELEVATION_SOURCE:
      mElevationSourcePath = rasterPath;
      break;
    case BASEMAP_LAYER_AND_ELEVATION_SOURCE:
      loadRasterLayerAsBaseMapLayer(rasterPath);
      mElevationSourcePath = rasterPath;
      break;
    case OPERATIONAL_LAYER_AND_ELEVATION_SOURCE:
        loadRasterLayerAsOperationalLayer(rasterPath);
        mElevationSourcePath = rasterPath;
        break;
    case NONE:
      break;
    }
  }

  private RasterRenderer getRasterRenderer(RendererType type) {
    if ((mMapView == null) || (!mMapView.isLoaded())) {
      return null;
    }
    
    Layer[] layers = mMapView.getLayers();
    for (Layer layer : layers) {
      if (layer instanceof RasterLayer) {
        RasterLayer rasterLayer = (RasterLayer) layer;
        RasterRenderer renderer = rasterLayer.getRenderer();
        switch (type) {
          case BLEND:
            if (renderer instanceof BlendRenderer) {
              return renderer;
            }
            break;
          case HILLSHADE:
            if ((renderer instanceof HillshadeRenderer)
                    && (!(renderer instanceof BlendRenderer))) {
              return renderer;
            }
            break;
          case RGB:
            if (renderer instanceof RGBRenderer) {
              return renderer;
            }
            break;
          case STRETCHED:
            if (renderer instanceof StretchRenderer) {
              return renderer;
            }
            break;
        }
      }
    }

    return null;
  }
  
  private void createHillshadeRendererParameterFragment(RendererType type) {
    if (!((type == RendererType.BLEND) || (type == RendererType.HILLSHADE))) {
      return;
    }
    
    RasterRenderer rasterRenderer = getRasterRenderer(type);
    HillshadeRendererParametersFragment fragment = null;
    if (rasterRenderer == null) {
      fragment = HillshadeRendererParametersFragment
           .newInstance(type.getCode(), EditTextUtils.DEFAULT_DOUBLE_VALUE,
               EditTextUtils.DEFAULT_DOUBLE_VALUE,
               EditTextUtils.DEFAULT_DOUBLE_VALUE,
               EditTextUtils.DEFAULT_INT_VALUE,
               EditTextUtils.DEFAULT_DOUBLE_VALUE,
               EditTextUtils.DEFAULT_DOUBLE_VALUE,
               EditTextUtils.DEFAULT_DOUBLE_VALUE);
    } else {
      if (rasterRenderer instanceof BlendRenderer) {
        BlendRenderer renderer = (BlendRenderer) rasterRenderer;
        fragment = HillshadeRendererParametersFragment
             .newInstance(type.getCode(), renderer.getAltitude(), renderer.getAzimuth(), 
                 renderer.getZfactor(), renderer.getSlopeType().ordinal(), renderer.getPixelSizeFactor(), 
                 renderer.getPixelSizePower(), renderer.getGamma());
      } else if (rasterRenderer instanceof HillshadeRenderer) {
          HillshadeRenderer renderer = (HillshadeRenderer) rasterRenderer;
          fragment = HillshadeRendererParametersFragment
              .newInstance(type.getCode(), renderer.getAltitude(), renderer.getAzimuth(), 
                  renderer.getZfactor(), renderer.getSlopeType().ordinal(), renderer.getPixelSizeFactor(), 
                  renderer.getPixelSizePower(), EditTextUtils.DEFAULT_DOUBLE_VALUE);
        }
    }
    
    if (fragment == null) {
      return;
    }
    
    if (type == RendererType.BLEND) {
      fragment.show(getSupportFragmentManager(), "blend dialog");
    } else {
      fragment.show(getSupportFragmentManager(), "hillshade dialog");
    }
  }
  
  private void changeBlendRenderer() {
    createHillshadeRendererParameterFragment(RendererType.BLEND);
  }

  private void changeHillshadeRenderer() {
    createHillshadeRendererParameterFragment(RendererType.HILLSHADE);
  }

  private void createStretchParameterFragment(RendererType type) {
    if (!((type == RendererType.RGB) || (type == RendererType.STRETCHED))) {
      return;
    }
    
    RasterRenderer rasterRenderer = getRasterRenderer(type);
    StretchParametersFragment fragment;
    if (rasterRenderer == null) {
      fragment = StretchParametersFragment
           .newInstance(type.getCode(), EditTextUtils.DEFAULT_INT_VALUE,
               EditTextUtils.DEFAULT_DOUBLE_VALUE,
               EditTextUtils.DEFAULT_DOUBLE_VALUE,
               EditTextUtils.DEFAULT_DOUBLE_VALUE,
               EditTextUtils.DEFAULT_DOUBLE_VALUE);
    } else {
      StretchParameters params = null;
      if (rasterRenderer instanceof StretchRenderer) {
        StretchRenderer renderer = (StretchRenderer) rasterRenderer;
        params = renderer.getStretchParameters();
      } else if (rasterRenderer instanceof RGBRenderer) {
        RGBRenderer renderer = (RGBRenderer) rasterRenderer;
        params = renderer.getStretchParameters();
      }
      
      if (params != null) {
        double stdDev = EditTextUtils.DEFAULT_DOUBLE_VALUE;
        double minClip = EditTextUtils.DEFAULT_DOUBLE_VALUE;
        double maxClip = EditTextUtils.DEFAULT_DOUBLE_VALUE;
        double gamma = params.getGamma();
        if (params instanceof StdDevStretchParameters) {
          StdDevStretchParameters stdParams = (StdDevStretchParameters) params;
          stdDev = stdParams.getStdDev();
        } else if (params instanceof ClipStretchParameters) {
          ClipStretchParameters clipParams = (ClipStretchParameters) params;
          minClip = clipParams.getMinClip();
          maxClip = clipParams.getMaxClip();
        }
        fragment = StretchParametersFragment
            .newInstance(type.getCode(), params.getType().ordinal(), 
                stdDev,
                minClip, 
                maxClip,
                gamma);
      } else {
        fragment = StretchParametersFragment
            .newInstance(type.getCode(), EditTextUtils.DEFAULT_INT_VALUE,
                EditTextUtils.DEFAULT_DOUBLE_VALUE,
                EditTextUtils.DEFAULT_DOUBLE_VALUE,
                EditTextUtils.DEFAULT_DOUBLE_VALUE,
                EditTextUtils.DEFAULT_DOUBLE_VALUE);
      }
    }
    
    if (fragment == null) {
      return;
    }
    
    if (type == RendererType.RGB) {
      fragment.show(getSupportFragmentManager(), "RGB dialog");
    } else {
      fragment.show(getSupportFragmentManager(), "stretch dialog");
    }
  }
  
  private void changeRGBRenderer() {
    createStretchParameterFragment(RendererType.RGB);
  }

  private void changeStretchRenderer() {
    createStretchParameterFragment(RendererType.STRETCHED);
  }
  
  private void reset() {
    mElevationSourcePath = null;
  }

  private void openFileBrowser() {
    FileBrowserFragment fileFragment = FileBrowserFragment.newInstance();
    fileFragment.setInitialDirectory(mInitDir);
    getSupportFragmentManager().beginTransaction()
        .add(android.R.id.content, fileFragment).addToBackStack(null)
        .commit();
  }

}
Java Source Code List
