UiUtils

import android.app.Activity;
import android.app.Dialog;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.os.AsyncTask;
import android.os.IBinder;
import android.os.Looper;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.inputmethod.InputMethodManager;
import android.widget.EditText;
import android.widget.ImageView;

import java.io.InputStream;

/**
 * UI工具类
 * @version 1.0
 */
public class UiUtilities {
   /**
    * 设置view的显示状态
    */
   public static void setVisibilitySafe(View view, int visibility) {
      if (view != null && view.getVisibility() != visibility) {
         view.setVisibility(visibility);
      }
   }

   /**
    * 设置view的显示状态
    */
   public static void setVisibilitySafe(View parent, int id, int visibility) {
      if (parent != null) {
         setVisibilitySafe(parent.findViewById(id), visibility);
      }
   }

   public static void setPressedSafe(View view, boolean pressed) {
      if (view != null && view.isPressed() != pressed) {
         view.setPressed(pressed);
      }
   }

   public static void setEnabledSafe(View parent, int id, boolean enabled) {
      if (parent != null) {
         View view = parent.findViewById(id);
         if (view != null) {
            view.setEnabled(enabled);
         }
      }
   }

   public static void setOnClickListenerSafe(View parent, int id, OnClickListener l) {
      if (parent != null) {
         View view = parent.findViewById(id);
         if (view != null) {
            view.setOnClickListener(l);
         }
      }
   }

   public static void requestFocus(View view) {
      if (view != null) {
         view.setFocusable(true);
         view.setFocusableInTouchMode(true);
         view.requestFocus();
      }
   }

   public static boolean isEditTextEmpty(EditText edit) {
      return edit.getText() == null || edit.getText().toString().trim().length() <= 0;
   }

   public static boolean hideInputMethod(Activity activity) {
      return hideInputMethod(activity, activity.getWindow().getDecorView().getWindowToken());
   }

   public static boolean hideInputMethod(Dialog dialog) {
      return hideInputMethod(dialog.getContext(), dialog.getWindow().getDecorView().getWindowToken());
   }

   public static boolean hideInputMethod(Context context, IBinder iBinder) {
      InputMethodManager im = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
      return im.hideSoftInputFromWindow(iBinder, 0);
   }

   public static void checkBackgroudThread() {
      if (Looper.getMainLooper() == Looper.myLooper()) {
         throw new IllegalStateException("It must run in backgroud thread.");
      }
   }

   public static void cancelAsyncTask(AsyncTask<?, ?, ?> task) {
      if (task != null) {
         task.cancel(true);
      }
   }

   public static void clearBitmapInImageView(ImageView v) {
      if (v != null) {
         clearBitmapInDrawable(v.getDrawable());
      }
   }

   public static void clearBackgroundBitmapInView(View v) {
      if (v != null) {
         clearBitmapInDrawable(v.getBackground());
      }
   }

   public static void clearBitmapInDrawable(Drawable d) {
      if (d != null && d instanceof BitmapDrawable) {
         Bitmap bitmap = ((BitmapDrawable) d).getBitmap();
         if (bitmap != null) {
            Logger.v("luochun", bitmap.toString());
            bitmap.recycle();
         }
      }
   }

   public static Bitmap decodeResourceBitmap(Context context, int resId) {
      InputStream is = context.getResources().openRawResource(resId);
      return BitmapFactory.decodeStream(is);
   }
}