title: How to set gallery in Landscape mode
body: <p>I am new in android.in my application gallery widget are completely run in portrait mode but that is not properly show in landscape mode.in which i am using switch case for portrait and landscape mode in on create method.</p>
  
  <p>my code is below.</p>
  
  <pre><code>public class ViewAppGalleryActivity extends Activity {
      // take an array of integer type and set its value
      Integer[] mImageIds = { R.drawable.gallery_photo_19, R.drawable.gallery_photo_20,
              R.drawable.gallery_photo_21, R.drawable.gallery_photo_22, R.drawable.gallery_photo_23,
              R.drawable.gallery_photo_24, R.drawable.gallery_photo_25,R.drawable.gallery_photo_15,R.drawable.gallery_photo_16,R.drawable.gallery_photo_18,
              R.drawable.gallery_photo_9,R.drawable.gallery_photo_10,R.drawable.gallery_photo_11,R.drawable.gallery_photo_12,R.drawable.gallery_photo_26,
              R.drawable.gallery_photo_27, R.drawable.gallery_photo_28,R.drawable.gallery_photo_29, R.drawable.gallery_photo_30
              };
  
      int lastOrientation = 0;
      private int imageWidth;
      private ImageView leftArrowImageView;
      private int selectedImagePosition = 0;
      private ImageView rightArrowImageView;
      /** Called when the activity is first created. */
      @Override
      public void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
  
          switch (this.getResources().getConfiguration().orientation)
          {
          case Configuration.ORIENTATION_PORTRAIT:
              setContentView(R.layout.main);
              // take an instance of Gallery
  
  
               DisplayMetrics metrics = new DisplayMetrics();
               getWindowManager().getDefaultDisplay().getMetrics(metrics);
  
  
               final ExtendedGallery g = (ExtendedGallery)findViewById(R.id.gallery);
             //  g.setScrollingEnabled(false);
               MarginLayoutParams mlp = (MarginLayoutParams)g.getLayoutParams();
               mlp.setMargins(-(metrics.widthPixels/2 +60 ), mlp.topMargin,
                           mlp.rightMargin, mlp.bottomMargin);
              // set adapter to gallery calling ImageAdapter class
              g.setAdapter(new ImageAdapter(this, mImageIds));
              // set onItemClickListener on gallery Object
  
  
  
  
  
              g.setOnItemClickListener(new OnItemClickListener() {
                      public void onItemClick(AdapterView&lt;?&gt; parent, View view,
                          int position, long id) {
                      ImageView imgView=(ImageView)findViewById(R.id.imageView1);
                      imgView.setImageResource(mImageIds [position]);
  
                      // TODO Auto-generated method stub
                      // onItemClick show Message
                      //selectedImagePosition =position;
                      if (selectedImagePosition &gt; 0 &amp;&amp; selectedImagePosition &lt;mImageIds.length - 3) {
  
                                          leftArrowImageView.setImageDrawable(getResources().getDrawable(R.drawable.arrow_left_enabled));
                                          rightArrowImageView.setImageDrawable(getResources().getDrawable(R.drawable.arrow_right_enabled));
  
                                         } 
                      else if (selectedImagePosition == 0)
                                         {
  
                                          leftArrowImageView.setImageDrawable(getResources().getDrawable(R.drawable.arrow_left_disabled));
                                          rightArrowImageView.setImageDrawable(getResources().getDrawable(R.drawable.arrow_right_enabled));
                                         }
                      else if (selectedImagePosition == mImageIds.length - 3 || selectedImagePosition == mImageIds.length - 2 || selectedImagePosition == mImageIds.length - 1) 
                                         {
                                          leftArrowImageView.setImageDrawable(getResources().getDrawable(R.drawable.arrow_left_enabled));
                                          rightArrowImageView.setImageDrawable(getResources().getDrawable(R.drawable.arrow_right_disabled));
  
                                         }
  
                                     }
                                });
  
              g.setOnItemSelectedListener(new OnItemSelectedListener() {
  
                  public void onItemSelected(AdapterView&lt;?&gt; parent, View view, int pos, long id) {
  
                      selectedImagePosition = pos;
  
                      if (selectedImagePosition &gt; 0 &amp;&amp; selectedImagePosition &lt;mImageIds.length - 3) 
                                          {
  
                                          leftArrowImageView.setImageDrawable(getResources().getDrawable(R.drawable.arrow_left_enabled));
                                          rightArrowImageView.setImageDrawable(getResources().getDrawable(R.drawable.arrow_right_enabled));
  
                                          } 
                      else if (selectedImagePosition == 0) 
                                          {
  
                                          leftArrowImageView.setImageDrawable(getResources().getDrawable(R.drawable.arrow_left_disabled));
                                          rightArrowImageView.setImageDrawable(getResources().getDrawable(R.drawable.arrow_right_enabled));
                                          }
                      else if (selectedImagePosition == mImageIds.length - 3 || selectedImagePosition == mImageIds.length - 2 || selectedImagePosition == mImageIds.length - 1 )
                                          {
                                          leftArrowImageView.setImageDrawable(getResources().getDrawable(R.drawable.arrow_left_enabled));
                                          rightArrowImageView.setImageDrawable(getResources().getDrawable(R.drawable.arrow_right_disabled));
  
                                          }
  
  
                                  }
  
                  public void onNothingSelected(AdapterView&lt;?&gt; arg0) {
                      // TODO Auto-generated method stub
  
                                                                      }
                          });
  
  
              leftArrowImageView = (ImageView) findViewById(R.id.left_arrow_imageview);
              rightArrowImageView = (ImageView) findViewById(R.id.right_arrow_imageview);
  
              leftArrowImageView.setOnClickListener(new OnClickListener() {
  
                                                  public void onClick(View v) {
  
                                                      if (selectedImagePosition &gt; 2) {
  
                                                                                  --selectedImagePosition;
                                                                                  --selectedImagePosition;
                                                                                  --selectedImagePosition;
  
                                                      }
                                                      else if(selectedImagePosition == 2)
                                                      {
                                                                              --selectedImagePosition;
                                                                              --selectedImagePosition;
                                                      }
                                                      else if(selectedImagePosition == 1)
                                                      {
                                                                              --selectedImagePosition;
                                                      }
  
  
                                                       g.setSelection(selectedImagePosition, false);
                                                      //g.scrollBy(20, 0);
  
                                                          //leftArrowImageView.setImageDrawable(getResources().getDrawable(R.drawable.arrow_left_disabled));
  
  
  
                                                  }
                                              });
  
              rightArrowImageView.setOnClickListener(new OnClickListener() {
  
                  public void onClick(View v) {
  
                      if (selectedImagePosition &lt; mImageIds.length-3 )
                                              {
                                                  ++selectedImagePosition;
                                                  ++selectedImagePosition;
                                                  ++selectedImagePosition;
                                              }
  
                                              g.setSelection(selectedImagePosition, false);
  
                                              //rightArrowImageView.setImageDrawable(getResources().getDrawable(R.drawable.arrow_right_disabled));
                                          }
                                      });
  
  
  
            break;
          case   Configuration.ORIENTATION_LANDSCAPE:
  
  
              setContentView(R.layout.land);
               //setContentView(R.layout.main);
                  // take an instance of Gallery
  
  
                   DisplayMetrics metrics1 = new DisplayMetrics();
                   getWindowManager().getDefaultDisplay().getMetrics(metrics1);
  
  
                   final ExtendedGallery g1 = (ExtendedGallery)findViewById(R.id.gallery);
                 //  g.setScrollingEnabled(false);
                   MarginLayoutParams mlp1 = (MarginLayoutParams)g1.getLayoutParams();
                   mlp1.setMargins(-(metrics1.widthPixels/2 +60 ), mlp1.topMargin,
                               mlp1.rightMargin, mlp1.bottomMargin);
                  // set adapter to gallery calling ImageAdapter class
                  g1.setAdapter(new GalleryImageAdapter1(this, mImageIds));
                  // set onItemClickListener on gallery Object
  
  
  
  
  
                  g1.setOnItemClickListener(new OnItemClickListener() {
                          public void onItemClick(AdapterView&lt;?&gt; parent, View view,
                              int position, long id) {
                          ImageView imgView=(ImageView)findViewById(R.id.imageView1);
                          imgView.setImageResource(mImageIds [position]);
  
                          // TODO Auto-generated method stub
                          // onItemClick show Message
                          //selectedImagePosition =position;
                          if (selectedImagePosition &gt; 0 &amp;&amp; selectedImagePosition &lt;mImageIds.length - 3) {
  
                                              leftArrowImageView.setImageDrawable(getResources().getDrawable(R.drawable.arrow_left_enabled));
                                              rightArrowImageView.setImageDrawable(getResources().getDrawable(R.drawable.arrow_right_enabled));
  
                                             } 
                          else if (selectedImagePosition == 0)
                                             {
  
                                              leftArrowImageView.setImageDrawable(getResources().getDrawable(R.drawable.arrow_left_disabled));
                                              rightArrowImageView.setImageDrawable(getResources().getDrawable(R.drawable.arrow_right_enabled));
                                             }
                          else if (selectedImagePosition == mImageIds.length - 3 || selectedImagePosition == mImageIds.length - 2 || selectedImagePosition == mImageIds.length - 1) 
                                             {
                                              leftArrowImageView.setImageDrawable(getResources().getDrawable(R.drawable.arrow_left_enabled));
                                              rightArrowImageView.setImageDrawable(getResources().getDrawable(R.drawable.arrow_right_disabled));
  
                                             }
  
                                         }
                                    });
  
                  g1.setOnItemSelectedListener(new OnItemSelectedListener() {
  
                      public void onItemSelected(AdapterView&lt;?&gt; parent, View view, int pos, long id) {
  
                          selectedImagePosition = pos;
  
                          if (selectedImagePosition &gt; 0 &amp;&amp; selectedImagePosition &lt;mImageIds.length - 3) 
                                              {
  
                                              leftArrowImageView.setImageDrawable(getResources().getDrawable(R.drawable.arrow_left_enabled));
                                              rightArrowImageView.setImageDrawable(getResources().getDrawable(R.drawable.arrow_right_enabled));
  
                                              } 
                          else if (selectedImagePosition == 0) 
                                              {
  
                                              leftArrowImageView.setImageDrawable(getResources().getDrawable(R.drawable.arrow_left_disabled));
                                              rightArrowImageView.setImageDrawable(getResources().getDrawable(R.drawable.arrow_right_enabled));
                                              }
                          else if (selectedImagePosition == mImageIds.length - 3 || selectedImagePosition == mImageIds.length - 2 || selectedImagePosition == mImageIds.length - 1 )
                                              {
                                              leftArrowImageView.setImageDrawable(getResources().getDrawable(R.drawable.arrow_left_enabled));
                                              rightArrowImageView.setImageDrawable(getResources().getDrawable(R.drawable.arrow_right_disabled));
  
                                              }
  
  
                                      }
  
                      public void onNothingSelected(AdapterView&lt;?&gt; arg0) {
                          // TODO Auto-generated method stub
  
                                                                          }
                              });
  
  
                  leftArrowImageView = (ImageView) findViewById(R.id.left_arrow_imageview);
                  rightArrowImageView = (ImageView) findViewById(R.id.right_arrow_imageview);
  
                  leftArrowImageView.setOnClickListener(new OnClickListener() {
  
                                                      public void onClick(View v) {
  
                                                          if (selectedImagePosition &gt; 2) {
  
                                                                                      --selectedImagePosition;
                                                                                      --selectedImagePosition;
                                                                                      --selectedImagePosition;
  
                                                          }
                                                          else if(selectedImagePosition == 2)
                                                          {
                                                                                  --selectedImagePosition;
                                                                                  --selectedImagePosition;
                                                          }
                                                          else if(selectedImagePosition == 1)
                                                          {
                                                                                  --selectedImagePosition;
                                                          }
  
  
                                                           g1.setSelection(selectedImagePosition, false);
                                                          //g.scrollBy(20, 0);
  
                                                              //leftArrowImageView.setImageDrawable(getResources().getDrawable(R.drawable.arrow_left_disabled));
  
  
  
                                                      }
                                                  });
  
                  rightArrowImageView.setOnClickListener(new OnClickListener() {
  
                      public void onClick(View v) {
  
                          if (selectedImagePosition &lt; mImageIds.length-3 )
                                                  {
                                                      ++selectedImagePosition;
                                                      ++selectedImagePosition;
                                                      ++selectedImagePosition;
                                                  }
  
                                                  g1.setSelection(selectedImagePosition, false);
  
                                                  //rightArrowImageView.setImageDrawable(getResources().getDrawable(R.drawable.arrow_right_disabled));
                                              }
                                          });
  
  
  
  
  
  
  
            break;
  
          default:
              try {
                  throw new Exception("Unexpected orientation enumeration returned");
              } catch (Exception e) {
                  // TODO Auto-generated catch block
                  e.printStackTrace();
              }
            break;
          }
  
  
  
  
                      }
  </code></pre>