android.graphics.Camera#setLocation ( )源码实例Demo

public RotateView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    TypedArray array = context.obtainStyledAttributes(attrs, R.styleable.RotateView);
    BitmapDrawable bitmapDrawable = (BitmapDrawable) array.getDrawable(R.styleable.RotateView_viewBackgound2);
    array.recycle();

    if (bitmapDrawable != null) {

        bitmap = bitmapDrawable.getBitmap();
        byte[] bytes = BitmapUtil.bitmap2Bytes(bitmap);
        bitmap = BitmapUtil.resizeBitmapBytes(bytes);
    }else {
        bitmap = BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher);
    }

    camera = new Camera();
    paint = new Paint(Paint.ANTI_ALIAS_FLAG);
    DisplayMetrics metrics = getResources().getDisplayMetrics();
    float newZ = -metrics.density * 6;
    camera.setLocation(0, 0, newZ);
}
 

public ShuttersConsumer() {
    setReleaseMode(RELEASE_MODE_AUTO_OPEN_CLOSE);
    mCamera = new Camera();
    mCamera.setLocation(0,0, -20);
    mPaint = new Paint();
}
 

protected void applyTransformation(Transformation t) {
    final Matrix m = t.getMatrix();
    final float w = mWidth;
    final float h = mHeight;
    final float pX = mPivotX;
    final float pY = mPivotY;

    final float rX = mRotationX;
    final float rY = mRotationY;
    final float rZ = mRotationZ;
    if ((rX != 0) || (rY != 0) || (rZ != 0)) {
        final Camera camera = mCamera;
        camera.save();
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR1) {
            camera.setLocation(mCameraX, mCameraY, mCameraZ);
        }
        if (mTranslationZ != 0) {
            camera.translate(0, 0, mTranslationZ);
        }
        camera.rotateX(rX);
        camera.rotateY(rY);
        camera.rotateZ(-rZ);
        camera.getMatrix(m);
        camera.restore();
        m.preTranslate(-pX, -pY);
        m.postTranslate(pX, pY);
    }

    final float sX = mScaleX;
    final float sY = mScaleY;
    if ((sX != 1.0f) || (sY != 1.0f)) {
        m.postScale(sX, sY);
        final float sPX = -(pX / w) * ((sX * w) - w);
        final float sPY = -(pY / h) * ((sY * h) - h);
        m.postTranslate(sPX, sPY);
    }

    m.postTranslate(mTranslationX, mTranslationY);

    t.setAlpha(mAlpha);
}