I2P_Developers/i2p.i2p-bote.android
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Zoom QR code on click

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This commit is contained in:
str4d
2014-11-25 03:46:37 +00:00
parent 1a8c6bfe28
commit 0ed994f4d6
2 changed files with 279 additions and 106 deletions
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167
app/src/main/java/i2p/bote/android/config/ViewIdentityFragment.java
View File

@@ -6,6 +6,8 @@ import android.app.Dialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.Point;
import android.graphics.Rect;
import android.nfc.NdefMessage;
import android.nfc.NdefRecord;
import android.os.AsyncTask;
@@ -22,10 +24,15 @@ import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.AlphaAnimation;
import android.view.animation.DecelerateInterpolator;
import android.widget.ImageView;
import android.widget.TextView;
import com.google.zxing.integration.android.IntentIntegrator;
import com.nineoldandroids.animation.Animator;
import com.nineoldandroids.animation.AnimatorListenerAdapter;
import com.nineoldandroids.animation.AnimatorSet;
import com.nineoldandroids.animation.ObjectAnimator;
import com.nineoldandroids.view.ViewHelper;
import java.io.IOException;
import java.security.GeneralSecurityException;
@@ -51,6 +58,16 @@ public class ViewIdentityFragment extends Fragment {
TextView mCryptoField;
TextView mKeyField;
ImageView mKeyQrCode;
ImageView mExpandedQrCode;
// Hold a reference to the current animator,
// so that it can be canceled mid-way.
private Animator mQrCodeAnimator;
// The system "short" animation time duration, in milliseconds. This
// duration is ideal for subtle animations or animations that occur
// very frequently.
private int mShortAnimationDuration;
public static ViewIdentityFragment newInstance(String key) {
ViewIdentityFragment f = new ViewIdentityFragment();
@@ -65,6 +82,10 @@ public class ViewIdentityFragment extends Fragment {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
mKey = getArguments().getString(IDENTITY_KEY);
// Retrieve and cache the system's default "short" animation time.
mShortAnimationDuration = getResources().getInteger(
android.R.integer.config_shortAnimTime);
}
@Override
@@ -85,6 +106,7 @@ public class ViewIdentityFragment extends Fragment {
mCryptoField = (TextView) view.findViewById(R.id.crypto_impl);
mKeyField = (TextView) view.findViewById(R.id.key);
mKeyQrCode = (ImageView) view.findViewById(R.id.key_qr_code);
mExpandedQrCode = (ImageView) view.findViewById(R.id.expanded_qr_code);
if (mKey != null) {
try {
@@ -147,8 +169,7 @@ public class ViewIdentityFragment extends Fragment {
mKeyQrCode.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
IntentIntegrator i = new IntentIntegrator(getActivity());
i.shareText(Constants.EMAILDEST_SCHEME + ":" + mKey);
zoomQrCode();
}
});
@@ -267,6 +288,12 @@ public class ViewIdentityFragment extends Fragment {
mKeyQrCode.getHeight(), mKeyQrCode.getHeight(),
false);
mKeyQrCode.setImageBitmap(scaled);
// scale for the expanded image
int smallestDimen = Math.min(mExpandedQrCode.getWidth(), mExpandedQrCode.getHeight());
scaled = Bitmap.createScaledBitmap(qrCode,
smallestDimen, smallestDimen,
false);
mExpandedQrCode.setImageBitmap(scaled);
// simple fade-in animation
AlphaAnimation anim = new AlphaAnimation(0.0f, 1.0f);
anim.setDuration(200);
@@ -276,4 +303,138 @@ public class ViewIdentityFragment extends Fragment {
};
loadTask.execute();
}
private void zoomQrCode() {
// If there's an animation in progress, cancel it
// immediately and proceed with this one.
if (mQrCodeAnimator != null) {
mQrCodeAnimator.cancel();
}
// Calculate the starting and ending bounds for the zoomed-in image.
// This step involves lots of math. Yay, math.
final Rect startBounds = new Rect();
final Rect finalBounds = new Rect();
final Point globalOffset = new Point();
// The start bounds are the global visible rectangle of the thumbnail,
// and the final bounds are the global visible rectangle of the container
// view. Also set the container view's offset as the origin for the
// bounds, since that's the origin for the positioning animation
// properties (X, Y).
mKeyQrCode.getGlobalVisibleRect(startBounds);
getActivity().findViewById(R.id.container)
.getGlobalVisibleRect(finalBounds, globalOffset);
startBounds.offset(-globalOffset.x, -globalOffset.y);
finalBounds.offset(-globalOffset.x, -globalOffset.y);
// Adjust the start bounds to be the same aspect ratio as the final
// bounds using the "center crop" technique. This prevents undesirable
// stretching during the animation. Also calculate the start scaling
// factor (the end scaling factor is always 1.0).
float startScale;
if ((float) finalBounds.width() / finalBounds.height()
> (float) startBounds.width() / startBounds.height()) {
// Extend start bounds horizontally
startScale = (float) startBounds.height() / finalBounds.height();
float startWidth = startScale * finalBounds.width();
float deltaWidth = (startWidth - startBounds.width()) / 2;
startBounds.left -= deltaWidth;
startBounds.right += deltaWidth;
} else {
// Extend start bounds vertically
startScale = (float) startBounds.width() / finalBounds.width();
float startHeight = startScale * finalBounds.height();
float deltaHeight = (startHeight - startBounds.height()) / 2;
startBounds.top -= deltaHeight;
startBounds.bottom += deltaHeight;
}
// Hide the thumbnail and show the zoomed-in view. When the animation
// begins, it will position the zoomed-in view in the place of the
// thumbnail.
ViewHelper.setAlpha(mKeyQrCode, 0f);
mExpandedQrCode.setVisibility(View.VISIBLE);
// Set the pivot point for SCALE_X and SCALE_Y transformations
// to the top-left corner of the zoomed-in view (the default
// is the center of the view).
ViewHelper.setPivotX(mExpandedQrCode, 0f);
ViewHelper.setPivotY(mExpandedQrCode, 0f);
// Construct and run the parallel animation of the four translation and
// scale properties (X, Y, SCALE_X, and SCALE_Y).
AnimatorSet set = new AnimatorSet();
set
.play(ObjectAnimator.ofFloat(mExpandedQrCode, "x",
startBounds.left, finalBounds.left))
.with(ObjectAnimator.ofFloat(mExpandedQrCode, "y",
startBounds.top, finalBounds.top))
.with(ObjectAnimator.ofFloat(mExpandedQrCode, "scaleX",
startScale, 1f))
.with(ObjectAnimator.ofFloat(mExpandedQrCode, "scaleY",
startScale, 1f));
set.setDuration(mShortAnimationDuration);
set.setInterpolator(new DecelerateInterpolator());
set.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
mQrCodeAnimator = null;
}
@Override
public void onAnimationCancel(Animator animation) {
mQrCodeAnimator = null;
}
});
set.start();
mQrCodeAnimator = set;
// Upon clicking the zoomed-in image, it should zoom back down
// to the original bounds and show the thumbnail instead of
// the expanded image.
final float startScaleFinal = startScale;
mExpandedQrCode.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (mQrCodeAnimator != null) {
mQrCodeAnimator.cancel();
}
// Animate the four positioning/sizing properties in parallel,
// back to their original values.
AnimatorSet set = new AnimatorSet();
set.play(ObjectAnimator
.ofFloat(mExpandedQrCode, "x", startBounds.left))
.with(ObjectAnimator
.ofFloat(mExpandedQrCode,
"y", startBounds.top))
.with(ObjectAnimator
.ofFloat(mExpandedQrCode,
"scaleX", startScaleFinal))
.with(ObjectAnimator
.ofFloat(mExpandedQrCode,
"scaleY", startScaleFinal));
set.setDuration(mShortAnimationDuration);
set.setInterpolator(new DecelerateInterpolator());
set.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
ViewHelper.setAlpha(mKeyQrCode, 1f);
mExpandedQrCode.setVisibility(View.GONE);
mQrCodeAnimator = null;
}
@Override
public void onAnimationCancel(Animator animation) {
ViewHelper.setAlpha(mKeyQrCode, 1f);
mExpandedQrCode.setVisibility(View.GONE);
mQrCodeAnimator = null;
}
});
set.start();
mQrCodeAnimator = set;
}
});
}
}