Java tutorial
/* * Copyright 2015 Google Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package io.plaidapp.ui; import android.animation.Animator; import android.animation.AnimatorListenerAdapter; import android.app.Activity; import android.app.ActivityOptions; import android.content.Intent; import android.os.Bundle; import android.support.design.widget.TextInputLayout; import android.support.v4.app.ShareCompat; import android.support.v4.content.ContextCompat; import android.text.TextUtils; import android.view.KeyEvent; import android.view.ViewGroup; import android.view.ViewTreeObserver; import android.view.animation.AnimationUtils; import android.view.inputmethod.EditorInfo; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; import butterknife.Bind; import butterknife.BindDimen; import butterknife.ButterKnife; import butterknife.OnClick; import butterknife.OnEditorAction; import butterknife.OnTextChanged; import io.plaidapp.R; import io.plaidapp.data.prefs.DesignerNewsPrefs; import io.plaidapp.ui.transitions.FabDialogMorphSetup; import io.plaidapp.ui.widget.BottomSheet; import io.plaidapp.ui.widget.ObservableScrollView; import io.plaidapp.util.ImeUtils; public class PostNewDesignerNewsStory extends Activity { public static final String EXTRA_STORY_TITLE = "EXTRA_STORY_TITLE"; public static final String EXTRA_STORY_URL = "EXTRA_STORY_URL"; public static final String EXTRA_STORY_COMMENT = "EXTRA_STORY_COMMENT"; public static final int RESULT_POST = 2; public static final int RESULT_DRAG_DISMISSED = 3; @Bind(R.id.bottom_sheet) BottomSheet bottomSheet; @Bind(R.id.bottom_sheet_content) ViewGroup bottomSheetContent; @Bind(R.id.title) TextView sheetTitle; @Bind(R.id.scroll_container) ObservableScrollView scrollContainer; @Bind(R.id.new_story_title) EditText title; @Bind(R.id.new_story_url_label) TextInputLayout urlLabel; @Bind(R.id.new_story_url) EditText url; @Bind(R.id.new_story_comment_label) TextInputLayout commentLabel; @Bind(R.id.new_story_comment) EditText comment; @Bind(R.id.new_story_post) Button post; @BindDimen(R.dimen.z_app_bar) float appBarElevation; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_post_new_designer_news_story); ButterKnife.bind(this); FabDialogMorphSetup.setupSharedEelementTransitions(this, bottomSheetContent, 0); bottomSheet.addListener(new BottomSheet.Listener() { @Override public void onDragDismissed() { // After a drag dismiss, finish without the shared element return transition as // it no longer makes sense. Let the launching window know it's a drag dismiss so // that it can restore any UI used as an entering shared element setResult(RESULT_DRAG_DISMISSED); finish(); } @Override public void onDrag(int top) { /* no-op */ } }); scrollContainer.setListener(new ObservableScrollView.OnScrollListener() { @Override public void onScrolled(int scrollY) { if (scrollY != 0 && sheetTitle.getTranslationZ() != appBarElevation) { sheetTitle.animate().translationZ(appBarElevation).setStartDelay(0L).setDuration(80L) .setInterpolator(AnimationUtils.loadInterpolator(PostNewDesignerNewsStory.this, android.R.interpolator.fast_out_slow_in)) .start(); } else if (scrollY == 0 && sheetTitle.getTranslationZ() == appBarElevation) { sheetTitle.animate().translationZ(0f).setStartDelay(0L).setDuration(80L) .setInterpolator(AnimationUtils.loadInterpolator(PostNewDesignerNewsStory.this, android.R.interpolator.fast_out_slow_in)) .start(); } } }); // check for share intent if (isShareIntent()) { ShareCompat.IntentReader intentReader = ShareCompat.IntentReader.from(this); url.setText(intentReader.getText()); title.setText(intentReader.getSubject()); // when receiving a share there is no shared element transition so animate up the // bottom sheet to establish the spatial model i.e. that it can be dismissed downward overridePendingTransition(R.anim.post_story_enter, R.anim.fade_out_rapidly); bottomSheetContent.getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() { @Override public boolean onPreDraw() { bottomSheetContent.getViewTreeObserver().removeOnPreDrawListener(this); bottomSheetContent.setTranslationY(bottomSheetContent.getHeight()); bottomSheetContent.animate().translationY(0f).setStartDelay(120L).setDuration(240L) .setInterpolator(AnimationUtils.loadInterpolator(PostNewDesignerNewsStory.this, android.R.interpolator.linear_out_slow_in)); return false; } }); } } @Override protected void onPause() { // customize window animations overridePendingTransition(0, R.anim.fade_out_rapidly); super.onPause(); } @Override public void onBackPressed() { if (isShareIntent()) { bottomSheetContent.animate().translationY(bottomSheetContent.getHeight()).setDuration(160L) .setInterpolator(AnimationUtils.loadInterpolator(PostNewDesignerNewsStory.this, android.R.interpolator.fast_out_linear_in)) .setListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { finishAfterTransition(); } }); } else { super.onBackPressed(); } } @OnClick(R.id.bottom_sheet) protected void dismiss() { finishAfterTransition(); } @OnTextChanged(R.id.new_story_title) protected void titleTextChanged(CharSequence text) { setPostButtonState(); } @OnTextChanged(R.id.new_story_url) protected void urlTextChanged(CharSequence text) { final boolean emptyUrl = TextUtils.isEmpty(text); comment.setEnabled(emptyUrl); commentLabel.setEnabled(emptyUrl); comment.setFocusableInTouchMode(emptyUrl); setPostButtonState(); } @OnTextChanged(R.id.new_story_comment) protected void commentTextChanged(CharSequence text) { final boolean emptyComment = TextUtils.isEmpty(text); url.setEnabled(emptyComment); urlLabel.setEnabled(emptyComment); url.setFocusableInTouchMode(emptyComment); setPostButtonState(); } @OnClick(R.id.new_story_post) protected void postNewStory() { if (DesignerNewsPrefs.get(this).isLoggedIn()) { ImeUtils.hideIme(title); Intent data = new Intent(); data.putExtra(EXTRA_STORY_TITLE, title.getText().toString()); data.putExtra(EXTRA_STORY_URL, url.getText().toString()); data.putExtra(EXTRA_STORY_COMMENT, comment.getText().toString()); setResult(RESULT_POST, data); finishAfterTransition(); } else { Intent login = new Intent(this, DesignerNewsLogin.class); login.putExtra(FabDialogMorphSetup.EXTRA_SHARED_ELEMENT_START_COLOR, ContextCompat.getColor(this, R.color.designer_news)); login.putExtra(FabDialogMorphSetup.EXTRA_SHARED_ELEMENT_START_CORNER_RADIUS, 0); ActivityOptions options = ActivityOptions.makeSceneTransitionAnimation(this, post, getString(R.string.transition_designer_news_login)); startActivity(login, options.toBundle()); } } private boolean isShareIntent() { return getIntent() != null && Intent.ACTION_SEND.equals(getIntent().getAction()); } private void setPostButtonState() { post.setEnabled(!TextUtils.isEmpty(title.getText()) && (!TextUtils.isEmpty(url.getText()) || !TextUtils.isEmpty(comment.getText()))); } @OnEditorAction({ R.id.new_story_url, R.id.new_story_comment }) protected boolean onEditorAction(TextView textView, int actionId, KeyEvent event) { if (actionId == EditorInfo.IME_ACTION_SEND) { postNewStory(); return true; } return false; } }