UiUtils

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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);    } }