我基本上是在尝试实现拖放功能..
我正在尝试的是我在屏幕上提供图像序列,如果我单击images
将添加到Mains screen
. 但是我遇到的问题是,当我将新视图添加到其中时Main Screen
,其他所有视图views
也都移到了左上角。
你能告诉我是什么问题吗...?或者请给我一个教程或链接,我可以在其中找到解决方案....或如何实现这一点?
我正在使用Framelayout
,所以我也实现了图像重叠......
这是所有代码都在其中工作的类:
public class drag extends Activity implements OnClickListener, OnTouchListener
{
ImageView img1;
Button btn,btn2;
FrameLayout layout;
LayoutParams params;
ImageView im , im2, im3 ,im4;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
layout = (FrameLayout) findViewById(R.id.vg);
layout.setDrawingCacheEnabled(true);
im = (ImageView)findViewById(R.id.img1);
im.setDrawingCacheEnabled(true);
im.setOnTouchListener(this);
im.setOnClickListener(this);
btn = (Button)findViewById(R.id.btn1);
btn.setDrawingCacheEnabled(true);
btn.setOnClickListener(this);
btn.setOnTouchListener(this);
btn2 = (Button)findViewById(R.id.btn2);
btn2.setDrawingCacheEnabled(true);
btn2.setOnClickListener(this);
btn2.setOnTouchListener(this);
params = new LayoutParams(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT);
btn.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v)
{
im2 = new ImageView(drag.this);
Bitmap bm = BitmapFactory.decodeResource(getResources(), R.drawable.image);
im2.setImageBitmap(bm);
im2.setOnTouchListener(drag.this);
im2.setOnClickListener(drag.this);
layout.addView(im2, params);
}
});
btn2.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v)
{
Bitmap bm = BitmapFactory.decodeResource(getResources(), R.drawable.image);
saveImage(bm);
}
});
}
public void saveImage(Bitmap myBitmap)
{
MediaStore.Images.Media.insertImage(getContentResolver(), myBitmap, "mmsImage" , "mmsimage");
}
int l, t, r, b;
int oldLeft, oldTop;
PointF p, curr;
@Override
public boolean onTouch(View view, MotionEvent me)
{
if (me.getAction() == MotionEvent.ACTION_DOWN)
{
//status = START_DRAGGING;
Log.i("status"," AAA dOWN");
img1 = new ImageView(this);
view.setDrawingCacheEnabled(true);
Bitmap mmsImage = Bitmap.createBitmap(view.getDrawingCache());
img1.setImageBitmap(mmsImage);
img1.setOnTouchListener(drag.this);
img1.setOnClickListener(drag.this);
oldLeft = (int)view.getLeft();
oldTop = (int)view.getTop();
p = new PointF(me.getRawX(), me.getRawY());
}
if (me.getAction() == MotionEvent.ACTION_MOVE)
{
Log.i("status"," AAA draging");
int xDiff = (int)(me.getRawX() - p.x);
int yDiff = (int)(me.getRawY() - p.y);
p.x = me.getRawX();
p.y = me.getRawY();
l = view.getLeft();
t = view.getTop();
r = view.getRight();
b = view.getBottom();
view.layout(l + xDiff, t + yDiff , r + xDiff, b + yDiff);
}
if (me.getAction() == MotionEvent.ACTION_UP)
{
Log.i("status"," AAA UP");
//captureUserMove(view);
}
return false;
}
}
这是 XML:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/vg"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@android:color/white" >
<ImageView
android:id="@+id/img1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:src="@drawable/ic_launcher" />
<Button
android:id="@+id/btn1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center" />
<Button
android:id="@+id/btn2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom" />
</FrameLayout>