...

drawable-hdpi里面存放高分辨率的图片，如WVGA（480x800）,FWVGA（480x854）
drawable-mdpi里面存放中等分辨率的图片，如HVGA（320x480）
drawable-ldpi里面存放低分辨率的图片，如QVGA（240x320

 

private OnCheckedChangeListener onCheckedChangeListener=new OnCheckedChangeListener()
	{
		
		@Override
		public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)
		{
			if (isChecked)
			{
				Toast.makeText(getApplicationContext(), "看见密码", Toast.LENGTH_SHORT).show();
				EDpassword.setTransformationMethod(HideReturnsTransformationMethod.getInstance()); 
			}
			else 
			{
				Toast.makeText(getApplicationContext(), "没看见密码", Toast.LENGTH_SHORT).show();
				EDpassword.setTransformationMethod(PasswordTransformationMethod.getInstance());  
			}
		}
	};