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我正在使用示例对我的图像视图进行缩放缩放属性。当我从 xml 将图像设置为 src 到这个 imageview 时,这个例子工作得很好。例如

  <com.zoom.TouchImageView
    android:id="@+id/imageView1"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:scaleType="matrix"
    android:src="@drawable/idontcare" />

但是如果图像不够大,它不会覆盖全屏。所以如果我使用背景而不是 src

 <com.zoom.TouchImageView
    android:id="@+id/imageView1"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:scaleType="matrix"
    android:background="@drawable/idontcare" />

它覆盖全屏,但捏缩放不起作用。如果我使用“fitXY”缩放类型的pinchzoom,也可以代替“matrix”。

如何实现全屏图像以及捏缩放?请帮忙。提前致谢。

4

2 回答 2

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TouchImageView 只支持 src 不支持 ImageView 中的背景。因此,您可以做的是使用所需的图像设置您的 src 并将背景保留在其中作为图像的免费颜色。类似的东西。

 <com.zoom.TouchImageView
    android:id="@+id/imageView1"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:scaleType="matrix"
    android:src="@drawable/idontcare"
    android:background="----- Background color of idontcare image--" />

试试看。!

于 2012-12-21T08:17:55.973 回答
0

我将图像的位置从 sdcard 传递给此活动,并将图像视图设置为位图图像........

public class ZoomInZoomOut extends Activity implements OnTouchListener
{

    private static final String TAG = "Touch";
    @SuppressWarnings("unused")
    private static final float MIN_ZOOM = 1f,MAX_ZOOM = 1f;

    // These matrices will be used to scale points of the image
    Matrix matrix = new Matrix();
    Matrix savedMatrix = new Matrix();

    // The 3 states (events) which the user is trying to perform
    static final int NONE = 0;
    static final int DRAG = 1;
    static final int ZOOM = 2;
    int mode = NONE;

    // these PointF objects are used to record the point(s) the user is touching
    PointF start = new PointF();
    PointF mid = new PointF();
    float oldDist = 1f;
    private String loc;
    private ImageView view;
    private Bitmap bmImg;
    private ArrayList<String> array_loc;
    private Button   next;
    private int total=0;


    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);

        try{
            setContentView(R.layout.full_image);

            Intent i = getIntent();
            loc = i.getExtras().getString("loc").toString().trim();
            int position = i.getExtras().getInt("id");


            next = (Button)findViewById(R.id.next); 
            view = (ImageView) findViewById(R.id.full_image_view);

            bmImg = BitmapFactory.decodeFile(loc);
            view.setImageBitmap(bmImg);
            view.setOnTouchListener(this);
            System.out.println("..."+position);


            array_loc = new ArrayList<String>();
            String targetPath = "/mnt/sdcard/DCIM/Camera/";
            File targetDirector = new File(targetPath);
            File[] files = targetDirector.listFiles();
            for (File file : files){
                array_loc.add(file.getAbsolutePath());
                total+=1;
            }
            System.out.println(array_loc);
            System.out.println(array_loc.get(1));


            next.setOnClickListener(new OnClickListener() {

                @Override
                public void onClick(View v) {
                    // TODO Auto-generated method stub

                }
            });
        }catch (Exception e) {
            System.out.println(e);
        }
    }



    public boolean onTouch(View v, MotionEvent event)
    {
        try{
            ImageView view = (ImageView) v;
            view.setScaleType(ImageView.ScaleType.MATRIX);
            float scale;

            dumpEvent(event);
            // Handle touch events here...

            switch (event.getAction() & MotionEvent.ACTION_MASK)
            {
                case MotionEvent.ACTION_DOWN:   // first finger down only
                    savedMatrix.set(matrix);
                    start.set(event.getX(), event.getY());
                    Log.d(TAG, "mode=DRAG"); // write to LogCat
                    mode = DRAG;
                    break;

                case MotionEvent.ACTION_UP: // first finger lifted

                case MotionEvent.ACTION_POINTER_UP: // second finger lifted

                    mode = NONE;
                    Log.d(TAG, "mode=NONE");
                    break;

                case MotionEvent.ACTION_POINTER_DOWN: // first and second finger down

                    oldDist = spacing(event);
                    Log.d(TAG, "oldDist=" + oldDist);
                    if (oldDist > 5f) {
                        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); // create the transformation in the matrix  of points
                    }
                    else if (mode == ZOOM)
                    {
                        // pinch zooming
                        float newDist = spacing(event);
                        Log.d(TAG, "newDist=" + newDist);
                        if (newDist > 5f)
                        {
                            matrix.set(savedMatrix);
                            scale = newDist / oldDist; // setting the scaling of the
                                                        // matrix...if scale > 1 means
                                                        // zoom in...if scale < 1 means
                                                        // zoom out
                            matrix.postScale(scale, scale, mid.x, mid.y);
                        }
                    }
                    break;
            }

            view.setImageMatrix(matrix); // display the transformation on screen
        }catch (Exception e) {
            System.out.println(e);
        }
        return true; // indicate event was handled
    }

    /*
     * --------------------------------------------------------------------------
     * Method: spacing Parameters: MotionEvent Returns: float Description:
     * checks the spacing between the two fingers on touch
     * ----------------------------------------------------
     */

    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);
    }

    /*
     * --------------------------------------------------------------------------
     * Method: midPoint Parameters: PointF object, MotionEvent Returns: void
     * Description: calculates the midpoint between the two fingers
     * ------------------------------------------------------------
     */

    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);
    }

    /** Show an event in the LogCat view, for debugging */
    private void dumpEvent(MotionEvent event)
    {
        try{
            String names[] = { "DOWN", "UP", "MOVE", "CANCEL", "OUTSIDE","POINTER_DOWN", "POINTER_UP", "7?", "8?", "9?" };
            StringBuilder sb = new StringBuilder();
            int action = event.getAction();
            int actionCode = action & MotionEvent.ACTION_MASK;
            sb.append("event ACTION_").append(names[actionCode]);

            if (actionCode == MotionEvent.ACTION_POINTER_DOWN || actionCode == MotionEvent.ACTION_POINTER_UP)
            {
                sb.append("(pid ").append(action >> MotionEvent.ACTION_POINTER_ID_SHIFT);
                sb.append(")");
            }

            sb.append("[");
            for (int i = 0; i < event.getPointerCount(); i++)
            {
                sb.append("#").append(i);
                sb.append("(pid ").append(event.getPointerId(i));
                sb.append(")=").append((int) event.getX(i));
                sb.append(",").append((int) event.getY(i));
                if (i + 1 < event.getPointerCount())
                    sb.append(";");
            }

            sb.append("]");
            Log.d("Touch Events ---------", sb.toString());
        } catch (Exception e) {
            System.out.println(e);
        }
    }

    @Override
    public void onBackPressed() {
        // TODO Auto-generated method stub

        Intent i = new Intent(getApplicationContext(),AndroidGridLayoutActivity.class);
        startActivity(i);
        ZoomInZoomOut.this.finish();
    }

}
于 2012-12-21T09:52:22.397 回答