[英]setMovementMethod (Scrolling) interferes with scaleGestureDetector (zooming) in a textView
thank you so much for reading. 非常感谢您的阅读。 I have a textView that you can pinch zoom, and when I add "textview.setMovementMethod(new ScrollingMovementMethod());"
我有一个可以缩放的"textview.setMovementMethod(new ScrollingMovementMethod());"
,当我添加"textview.setMovementMethod(new ScrollingMovementMethod());"
to my code I can also scroll the zoomed textview which is exactly what I need. 在我的代码中,我还可以滚动缩放文本视图,这正是我所需要的。 The problem is as soon as the text is zoomed, only the scrolling works but the pinch zoom doesnt work anymore, (unless I place one of my fingers outside the textview and the other inside). 问题是,一旦文本被缩放,只有滚动功能起作用,但捏缩放不再起作用(除非我将一根手指放在文本视图的外面,另一根放在里面)。 Any help will be really appreciated. 任何帮助将不胜感激。 I got the code from here: Pinch Zooming TextView 我从这里得到代码: 捏缩放TextView
import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
import android.util.TypedValue;
import android.view.Menu;
import android.view.MotionEvent;
import android.view.ScaleGestureDetector;
import android.view.ScaleGestureDetector.SimpleOnScaleGestureListener;
import android.widget.TextView;
public class MainActivity extends Activity {
TextView scaleGesture;
ScaleGestureDetector scaleGestureDetector;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
scaleGesture = (TextView)findViewById(R.id.article);
scaleGesture.setText("this is some text");
scaleGestureDetector = new ScaleGestureDetector(this, new simpleOnScaleGestureListener());
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
@Override
public boolean onTouchEvent(MotionEvent event) {
// TODO Auto-generated method stub
scaleGestureDetector.onTouchEvent(event);
return true;
}
public class simpleOnScaleGestureListener extends
SimpleOnScaleGestureListener {
@Override
public boolean onScale(ScaleGestureDetector detector) {
// TODO Auto-generated method stub
float size = scaleGesture.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));
scaleGesture.setTextSize(TypedValue.COMPLEX_UNIT_PX, product);
size = scaleGesture.getTextSize();
Log.d("TextSizeEnd", String.valueOf(size));
return true;
}
}
}`
I just resolve this problem (with the same example) only add one "if" in my code: 我只是解决了这个问题(使用相同的示例),在我的代码中只添加了一个“ if”:
@Override
public boolean onTouchEvent(MotionEvent event) {
// get how many fingers is in touch (in that case, if are more
// than 1, the user don't want do the scroll
if (event.getPointerCount() > 1) {
scaleGestureDetector.onTouchEvent(event);
return true;
}
return false;
}
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.