I am developing an android app after image view is rotated image view not fitting the entire screen how can I fit the entire screen so that ImageView covers the entire screen
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below my MainActivity.java where I have implemented image rotation logic in my java class below my MainActivity.java where I have implemented image rotation logic in my java class
public class MainActivity extends AppCompatActivity {
float scaleDiff;
private static final int NONE = 0;
private static final int DRAG = 1;
private static final int ZOOM = 2;
private int mode = NONE;
private float oldDist = 1f;
private float d = 0f;
private float newRot = 0f;
@BindView(R.id.show_image)
ImageView mImageView;
private boolean mMoved = false;
private PhotoViewAttacher mViewAttacher;
private float mScaleX = 0, mScaleY = 0;
@SuppressLint("ClickableViewAccessibility")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ButterKnife.bind(this);
mScaleX = mImageView.getScaleX();
mScaleY = mImageView.getScaleY();
final RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(getScreenWidth(), getScreenHeight());
mImageView.setLayoutParams(layoutParams);
mImageView.setOnTouchListener(new View.OnTouchListener() {
RelativeLayout.LayoutParams params;
int startWidth;
int startHeight;
float dx = 0, dy = 0, x = 0, y = 0;
float angle = 0;
@Override
public boolean onTouch(View v, MotionEvent event) {
final ImageView view = (ImageView) v;
((BitmapDrawable) view.getDrawable()).setAntiAlias(true);
switch (event.getAction() & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_DOWN:
params = (RelativeLayout.LayoutParams) view.getLayoutParams();
startWidth = params.width;
startHeight = params.height;
dx = event.getRawX() - params.leftMargin;
dy = event.getRawY() - params.topMargin;
mode = DRAG;
break;
case MotionEvent.ACTION_POINTER_DOWN:
oldDist = spacing(event);
if (oldDist > 10f) {
mode = ZOOM;
}
d = rotation(event);
break;
case MotionEvent.ACTION_UP:
if (view.getScaleX() <= mScaleX || view.getScaleY() <= mScaleY) {
view.setScaleX(mScaleX);
view.setScaleY(mScaleY);
params.leftMargin = 0;
params.topMargin = 0;
params.rightMargin = 0;
params.bottomMargin = 0;
}
if (mMoved || view.getWidth() != getScreenWidth() || view.getHeight() != getScreenHeight()) {
params.leftMargin = 0;
params.topMargin = 0;
params.rightMargin = 0;
params.bottomMargin = 0;
mMoved = false;
}
view.setScaleType(ImageView.ScaleType.CENTER_CROP);
view.setLayoutParams(params);
break;
case MotionEvent.ACTION_POINTER_UP:
mode = NONE;
break;
case MotionEvent.ACTION_MOVE:
if (mode == DRAG) {
mMoved = true;
x = event.getRawX();
y = event.getRawY();
params.leftMargin = (int) (x - dx);
params.topMargin = (int) (y - dy);
params.rightMargin = 0;
params.bottomMargin = 0;
params.rightMargin = params.leftMargin + (5 * params.width);
params.bottomMargin = params.topMargin + (10 * params.height);
view.setLayoutParams(params);
}
else if (mode == ZOOM) {
if (event.getPointerCount() == 2) {
newRot = rotation(event);
float r = newRot - d;
angle = r;
x = event.getRawX();
y = event.getRawY();
float newDist = spacing(event);
if (newDist > 10f) {
float scale = newDist / oldDist * view.getScaleX();
if (scale > 0.6) {
scaleDiff = scale;
view.setScaleX(scale);
view.setScaleY(scale);
}
}
view.animate().rotationBy(angle).setDuration(0).setInterpolator(new LinearInterpolator()).start();
x = event.getRawX();
y = event.getRawY();
params.leftMargin = (int) ((x - dx) + scaleDiff);
params.topMargin = (int) ((y - dy) + scaleDiff);
params.rightMargin = 0;
params.bottomMargin = 0;
params.rightMargin = params.leftMargin + (5 * params.width);
params.bottomMargin = params.topMargin + (10 * params.height);
view.setLayoutParams(params);
}
}
break;
}
return true;
}
});
}
private float spacing(MotionEvent event) {
float x = event.getX(0) - event.getX(1);
float y = event.getY(0) - event.getY(1);
return (float) Math.sqrt(x * x + y * y);
}
private float rotation(MotionEvent event) {
double delta_x = (event.getX(0) - event.getX(1));
double delta_y = (event.getY(0) - event.getY(1));
double radians = Math.atan2(delta_y, delta_x);
return (float) Math.toDegrees(radians);
}
public static int getScreenWidth() {
return Resources.getSystem().getDisplayMetrics().widthPixels;
}
public static int getScreenHeight() {
return Resources.getSystem().getDisplayMetrics().heightPixels;
}
}
below activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:id="@+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:visibility="gone" />
<ImageView
android:id="@+id/show_image"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_centerInParent="true"
android:scaleType="centerCrop"
android:adjustViewBounds="true"
android:src="@drawable/abstract_image"
android:transitionName="image_transition" />
</RelativeLayout>
