Android 动议及;在单个活动上缩放多个图像视图
我能够实现对单个imageView的拖动和缩放,下面是代码Android 动议及;在单个活动上缩放多个图像视图,android,imageview,zooming,move,multi-touch,Android,Imageview,Zooming,Move,Multi Touch,我能够实现对单个imageView的拖动和缩放,下面是代码 public class Touch extends Activity { private static final String TAG = "Touch"; Matrix matrix = new Matrix(); Matrix savedMatrix = new Matrix(); private PointF start = new PointF(); private PointF mid = new PointF(); pr
public class Touch extends Activity {
private static final String TAG = "Touch";
Matrix matrix = new Matrix();
Matrix savedMatrix = new Matrix();
private PointF start = new PointF();
private PointF mid = new PointF();
private float oldDist = 1f;
// We can be in one of these 3 states
static final int NONE = 0;
static final int DRAG = 1;
static final int ZOOM = 2;
int mode = NONE;
ImageView tv1;
LayoutParams layoutParams1;
ImageView tv2;
LayoutParams layoutParams2;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final int windowwidth = getWindowManager().getDefaultDisplay()
.getWidth();
final int windowheight = getWindowManager().getDefaultDisplay()
.getHeight();
tv1 = (ImageView) findViewById(R.id.imageView);
tv1.setOnTouchListener(new View.OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
layoutParams1 = (RelativeLayout.LayoutParams) tv1
.getLayoutParams();
switch (event.getActionMasked()) {
case MotionEvent.ACTION_DOWN:
break;
case MotionEvent.ACTION_MOVE:
int x_cord = (int) event.getRawX();
int y_cord = (int) event.getRawY();
if (x_cord > windowwidth) {
x_cord = windowwidth;
}
if (y_cord > windowheight) {
y_cord = windowheight;
}
layoutParams1.leftMargin = x_cord - 25;
layoutParams1.topMargin = y_cord - 75;
tv1.setLayoutParams(layoutParams1);
break;
default:
break;
}
return true;
}
});
tv2 = (ImageView) findViewById(R.id.imageView2);
tv2.setOnTouchListener(new View.OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
layoutParams2 = (RelativeLayout.LayoutParams) tv2
.getLayoutParams();
switch (event.getActionMasked()) {
case MotionEvent.ACTION_DOWN:
break;
case MotionEvent.ACTION_MOVE:
int x_cord = (int) event.getRawX();
int y_cord = (int) event.getRawY();
if (x_cord > windowwidth) {
x_cord = windowwidth;
}
if (y_cord > windowheight) {
y_cord = windowheight;
}
layoutParams2.leftMargin = x_cord - 25;
layoutParams2.topMargin = y_cord - 75;
tv2.setLayoutParams(layoutParams2);
break;
default:
break;
}
return true;
}
});
}
}
这是xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<ImageView
android:id="@+id/imageView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:scaleType="matrix"
android:src="@drawable/ic_launcher" />
</LinearLayout>
现在我的问题是,我想动态添加多个imageView,并在每个imageView上应用拖动、缩放。谁能帮我实现这个目标?我见过很多其他的方法,但都有一些限制。从示例中,您可以将图像拖动为“多媒体资料视图”,并可以进行收缩缩放。在本例中,您有一个适配器类。。所以您可以动态绑定图像
这样装订
for(int i=0;i<bmpList.size();i++)
{
ImageViewTouch imageView = new ImageViewTouch(Philately_image_view.this);
imageView.setLayoutParams(new Gallery.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
Options options = new Options();
options.inSampleSize = 2;
//Bitmap bitmap = BitmapFactory.decodeFile(file.getPath(), options);
imageView.setImageBitmap(bmpList.get(i));
arrayAdapter.add(imageView);
}
galleryTouch.setAdapter(arrayAdapter);
用于(int i=0;此示例从galley加载随机图像,但我无法移动或缩放该图像…请参阅此galeryTousttest.java…并从数组加载图像..因此您需要对其进行细微更改此类从gallery提取图像,并将图像的arrayAdapter放在gallery小部件上..我需要在缩放时动态添加图像视图,单独移动这些图像。这通常发生在图像拼贴应用程序中,但我不想在gallery中显示它们,我想在单个屏幕上移动缩放和旋转。就像在单个活动中拼贴图像一样。