调整|移动图像中的Android对于API&LT; 11 [英] Resize | Move Image in Android for Api < 11
本文介绍了调整|移动图像中的Android对于API&LT; 11的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
I'been努力实现
I'been trying to achieve
1 拖放(移动)API&LT; 11
2 调整(比原图像大)
。
有没有从中我们可以调整大小和查看移动图像的任何外部库??
Is there any external library from which we can resize and move the image in View??
外部材料| API |图书馆和链接将是最欢迎
External Materials | Api | Library and Links would be welcomes most
任何帮助将是AP preciated !!
Any help would be appreciated!!
推荐答案
与播放各地矩阵()
和 onTouchListener()
已经由完成工作。
public class CustomizeActivity extends Activity {
private static final String TAG = "Touch" ;
Matrix matrix = new Matrix();
Matrix savedMatrix = new Matrix();
PointF start = new PointF();
public static PointF mid = new PointF();
public static final int NONE = 0;
public static final int DRAG = 1;
public static final int ZOOM = 2;
public static int mode = NONE;
float oldDist;
private float[] matrixValues = new float[9];
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
iv=new ImageView(this);
iv.setOnTouchListener(t);
}
OnTouchListener t=new View.OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
ImageView view = (ImageView) v;
switch (event.getAction() & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_DOWN:
savedMatrix.set(matrix);
start.set(event.getX(), event.getY());
Log.d(TAG, "mode=DRAG" );
mode = DRAG;
break;
case MotionEvent.ACTION_POINTER_DOWN:
oldDist = spacing(event);
Log.d(TAG, "oldDist=" + oldDist);
if (oldDist > 10f) {
savedMatrix.set(matrix);
midPoint(mid, event);
mode = ZOOM;
Log.d(TAG, "mode=ZOOM" );
}
break;
case MotionEvent.ACTION_MOVE:
if (mode == DRAG) {
matrix.set(savedMatrix);
matrix.postTranslate(event.getX() - start.x, event.getY() - start.y);
}
else if (mode == ZOOM) {
float newDist = spacing(event);
Log.d(TAG, "newDist=" + newDist);
if (newDist > 10f) {
matrix.set(savedMatrix);
float scale = newDist / oldDist;
matrix.postScale(scale, scale, mid.x, mid.y);
}
}
break;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_POINTER_UP:
mode = NONE;
Log.d(TAG, "mode=NONE" );
break;
}
// Perform the transformation
view.setImageMatrix(matrix);
return true; // indicate event was handled
}
private float spacing(MotionEvent event) {
float x = event.getX(0) - event.getX(1);
float y = event.getY(0) - event.getY(1);
return FloatMath.sqrt(x * x + y * y);
}
private void midPoint(PointF point, MotionEvent event) {
float x = event.getX(0) + event.getX(1);
float y = event.getY(0) + event.getY(1);
point.set(x / 2, y / 2);
}
};
}
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