Java tutorial
/* * Copyright 2013 The Android Open Source Project * * 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 st.ghostca.ghostcast; import android.net.Uri; import android.os.Bundle; import android.support.v4.app.FragmentTransaction; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.animation.Animation; import android.view.animation.TranslateAnimation; import android.widget.Toast; import android.widget.ViewAnimator; import st.ghostca.ghostcast.common.activities.SampleActivityBase; import st.ghostca.ghostcast.common.logger.Log; import st.ghostca.ghostcast.common.logger.LogFragment; import st.ghostca.ghostcast.common.logger.LogWrapper; import st.ghostca.ghostcast.common.logger.MessageOnlyLogFilter; import st.ghostca.ghostcast.fragments.FeedFragment; import st.ghostca.ghostcast.fragments.FriendsFragment; import st.ghostca.ghostcast.fragments.LurkFragment; /** * A simple launcher activity containing a summary sample description, sample log and a custom * {@link android.support.v4.app.Fragment} which can display a view. * <p> * For devices with displays with a width of 720dp or greater, the sample log is always visible, * on other devices it's visibility is controlled by an item on the Action Bar. */ public class MainActivity extends SampleActivityBase implements FeedFragment.OnFragmentInteractionListener, FriendsFragment.OnFragmentInteractionListener, LurkFragment.OnFragmentInteractionListener { public static final String TAG = "MainActivity"; // Whether the Log Fragment is currently shown private boolean mLogShown; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); if (savedInstanceState == null) { FragmentTransaction transaction = getSupportFragmentManager().beginTransaction(); SlidingTabsColorsFragment fragment = new SlidingTabsColorsFragment(); transaction.replace(R.id.sample_content_fragment, fragment); transaction.commit(); } } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.main, menu); return true; } @Override public boolean onPrepareOptionsMenu(Menu menu) { MenuItem logToggle = menu.findItem(R.id.menu_toggle_log); logToggle.setVisible(findViewById(R.id.sample_output) instanceof ViewAnimator); logToggle.setTitle(mLogShown ? R.string.sample_hide_log : R.string.sample_show_log); return super.onPrepareOptionsMenu(menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.menu_toggle_log: mLogShown = !mLogShown; ViewAnimator output = (ViewAnimator) findViewById(R.id.sample_output); if (mLogShown) { output.setDisplayedChild(1); View backgroundMap = findViewById(R.id.background_map); backgroundMap.setVisibility(View.VISIBLE); backgroundMap.setAlpha(1); View core = findViewById(R.id.core_fragment); slideDown(core); } else { output.setDisplayedChild(0); View backgroundMap = findViewById(R.id.background_map); backgroundMap.setVisibility(View.GONE); backgroundMap.setAlpha(0); View core = findViewById(R.id.core_fragment); slideUp(core); } supportInvalidateOptionsMenu(); return true; } return super.onOptionsItemSelected(item); } /** Create a chain of targets that will receive log data */ @Override public void initializeLogging() { // Wraps Android's native log framework. LogWrapper logWrapper = new LogWrapper(); // Using Log, front-end to the logging chain, emulates android.util.log method signatures. Log.setLogNode(logWrapper); // Filter strips out everything except the message text. MessageOnlyLogFilter msgFilter = new MessageOnlyLogFilter(); logWrapper.setNext(msgFilter); // On screen logging via a fragment with a TextView. LogFragment logFragment = (LogFragment) getSupportFragmentManager().findFragmentById(R.id.log_fragment); msgFilter.setNext(logFragment.getLogView()); Log.i(TAG, "Ready"); } public void onFeedFragmentInteraction(String id) { Toast.makeText(getApplicationContext(), "ID: " + id, Toast.LENGTH_SHORT).show(); } public void onFriendFragmentInteraction(String id) { Toast.makeText(getApplicationContext(), "ID: " + id, Toast.LENGTH_SHORT).show(); } @Override public void onLurkFragmentInteraction(Uri uri) { } ////////////////// private Animation.AnimationListener slideDownAnimationListener = new Animation.AnimationListener() { @Override public void onAnimationStart(Animation animation) { } @Override public void onAnimationRepeat(Animation animation) { } @Override public void onAnimationEnd(Animation animation) { //View view = findViewById(R.id.sample_main_layout); View view = findViewById(R.id.core_fragment); final int left = view.getLeft(); final int top = view.getTop(); final int right = view.getRight(); final int bottom = view.getBottom(); //view.layout(left, (int)(top - 0.25 * top), right, (int)(bottom - 0.25 * bottom)); view.layout(left, (int) (top + 0.25 * top), right, (int) (bottom + 0.25 * bottom)); } }; private Animation.AnimationListener slideUpAnimationListener = new Animation.AnimationListener() { @Override public void onAnimationStart(Animation animation) { } @Override public void onAnimationRepeat(Animation animation) { } @Override public void onAnimationEnd(Animation animation) { //View view = findViewById(R.id.sample_main_layout); View view = findViewById(R.id.core_fragment); final int left = view.getLeft(); final int top = view.getTop(); final int right = view.getRight(); final int bottom = view.getBottom(); //view.layout(left, (int)(top - 0.25 * top), right, (int)(bottom - 0.25 * bottom)); view.layout(left, (int) (top - 0.25 * top), right, (int) (bottom - 0.25 * bottom)); } }; private Animation slideDownAnimation = new TranslateAnimation(Animation.RELATIVE_TO_SELF, 0.0f, Animation.RELATIVE_TO_SELF, 0.0f, //Animation.RELATIVE_TO_SELF, -0.25f, //Animation.RELATIVE_TO_SELF, 0.0f Animation.RELATIVE_TO_SELF, 0.0f, Animation.RELATIVE_TO_SELF, 0.25f); private Animation slideUpAnimation = new TranslateAnimation(Animation.RELATIVE_TO_SELF, 0.0f, Animation.RELATIVE_TO_SELF, 0.0f, //Animation.RELATIVE_TO_SELF, -0.25f, //Animation.RELATIVE_TO_SELF, 0.0f Animation.RELATIVE_TO_SELF, 0.25f, Animation.RELATIVE_TO_SELF, 0.0f); private void slideDown(final View view) { slideDownAnimation.setDuration(500); slideDownAnimation.setFillAfter(true); slideDownAnimation.setFillEnabled(true); slideDownAnimation.setAnimationListener(slideDownAnimationListener); view.startAnimation(slideDownAnimation); } private void slideUp(final View view) { slideUpAnimation.setDuration(500); slideUpAnimation.setFillAfter(true); slideUpAnimation.setFillEnabled(true); slideUpAnimation.setAnimationListener(slideDownAnimationListener); view.startAnimation(slideUpAnimation); } }