Android 使用SimpleOnScaleGetStereListener在片段中缩放EditText
正如在标题中一样,我正在研究如何在片段内的EditTextView上创建一个从收缩到缩放的效果。Android 使用SimpleOnScaleGetStereListener在片段中缩放EditText,android,android-edittext,pinchzoom,Android,Android Edittext,Pinchzoom,正如在标题中一样,我正在研究如何在片段内的EditTextView上创建一个从收缩到缩放的效果。 我还发现一个库无法正常工作。要做到这一点,您必须: 创建scalegestruedetector: ScaleGestureDetector scaleGestureDetector; EditText editTextView; @Override public void onCreate(Bundle savedinstances) { super.onCreate(savedinsta
我还发现一个库无法正常工作。要做到这一点,您必须: 创建scalegestruedetector:
ScaleGestureDetector scaleGestureDetector;
EditText editTextView;
@Override
public void onCreate(Bundle savedinstances)
{
super.onCreate(savedinstances);
scaleGestureDetector = new ScaleGestureDetector(this.getActivity().getApplicationContext(), new PinchToZoomGestureListener());
setHasOptionsMenu(true);
}
扩展SimpleOnScaleGetStureListener,并重写onScale方法:
public class PinchToZoomGestureListener extends
SimpleOnScaleGestureListener
{
@Override
public boolean onScale(ScaleGestureDetector detector)
{
float size = editTextView.getTextSize();
Log.d("TextSizeStart", String.valueOf(size));
float factor = detector.getScaleFactor();
Log.d("Factor", String.valueOf(factor));
float product = size * factor;
Log.d("TextSize", String.valueOf(product));
editTextView.setTextSize(TypedValue.COMPLEX_UNIT_PX, product);
size = editTextView.getTextSize();
Log.d("TextSizeEnd", String.valueOf(size));
return true;
}
}
在onCreateView方法上,只需执行以下操作:
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
View rootView = inflater.inflate(R.layout.fragment_home, container, false);
editTextView = (EditText) rootView.findViewById(R.id.editText1);
editTextView.setOnTouchListener(new View.OnTouchListener()
{
@Override
public boolean onTouch(View v, MotionEvent event)
{
scaleGestureDetector.onTouchEvent(event);
return v.performClick();
}
});
}
当重写onTouch事件时,eclipse建议在视图上调用performClick方法。如果未调用此方法,则您的edittext不可选择,您将使用TextView而不是edittext
因为我花了很少的时间,尝试了很多溶液,我希望这能帮助一些人:)
一些来源来自这个问题: