Java tutorial
/** * Copyright 2010-present Facebook. * * 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 ca.xef6.firecamp; import android.os.Bundle; import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.*; import com.facebook.widget.ProfilePictureView; import java.util.Date; import java.util.Random; public class ProfilePictureSampleFragment extends Fragment { // Keeping the number of custom sizes low to prevent excessive network chatter. private static final int MAX_CUSTOM_SIZES = 6; private static final int DEFAULT_SIZE_INCREMENT = MAX_CUSTOM_SIZES / 2; private static final String PICTURE_SIZE_TYPE_KEY = "PictureSizeType"; private static final String[] INTERESTING_IDS = { "zuck", // Recent Presidents and nominees "barackobama", "mittromney", "johnmccain", "johnkerry", "georgewbush", "algore", // Places too! "Disneyland", "SpaceNeedle", "TourEiffel", "sydneyoperahouse", // A selection of 1986 Mets "166020963458360", "108084865880237", "140447466087679", "111825495501392", // The cast of Saved by the Bell "108168249210849", "TiffaniThiessen", "108126672542534", "112886105391693", "MarioLopezExtra", "108504145837165", "dennishaskins", // Eighties bands that have been to Moscow "7220821999", "31938132882", "108023262558391", "209263392372", "104132506290482", "9721897972", "5461947317", "57084011597", // Three people that have never been in my kitchen "24408579964", "111980872152571", "112427772106500", // Trusted anchormen "113415525338717", "105628452803615", "105533779480538", }; private int pictureSizeType = ProfilePictureView.CUSTOM; private String firstUserId; private Random randomGenerator; private ProfilePictureView profilePic; private Button smallerButton; private Button largerButton; private TextView sizeLabel; private View presetSizeView; private SeekBar customSizeView; private CheckBox cropToggle; @Override public View onCreateView(LayoutInflater inflater, ViewGroup parent, Bundle savedInstanceState) { View fragmentView = inflater.inflate(R.layout.fragment_profile_picture_sample, parent, false); randomGenerator = new Random((new Date()).getTime()); profilePic = (ProfilePictureView) fragmentView.findViewById(R.id.profilepic); smallerButton = (Button) fragmentView.findViewById(R.id.smallerButton); largerButton = (Button) fragmentView.findViewById(R.id.largerButton); sizeLabel = (TextView) fragmentView.findViewById(R.id.sizeLabel); presetSizeView = fragmentView.findViewById(R.id.presetSizeView); customSizeView = (SeekBar) fragmentView.findViewById(R.id.customSizeView); cropToggle = (CheckBox) fragmentView.findViewById(R.id.squareCropToggle); LinearLayout container = (LinearLayout) fragmentView.findViewById(R.id.userbuttoncontainer); int numChildren = container.getChildCount(); for (int i = 0; i < numChildren; i++) { View childView = container.getChildAt(i); Object tag = childView.getTag(); if (childView instanceof Button) { setupUserButton((Button) childView); if (i == 0) { // Initialize the image to the first user firstUserId = tag.toString(); } } } cropToggle.setOnCheckedChangeListener(new CheckBox.OnCheckedChangeListener() { @Override public void onCheckedChanged(CompoundButton checkbox, boolean checked) { profilePic.setCropped(checked); } }); final Button sizeToggle = (Button) fragmentView.findViewById(R.id.sizeToggle); sizeToggle.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { if (pictureSizeType != ProfilePictureView.CUSTOM) { sizeToggle.setText("preset size button text"); switchToCustomSize(); } else { sizeToggle.setText("custom size button text"); switchToPresetSize(ProfilePictureView.LARGE); } } }); smallerButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { switch (profilePic.getPresetSize()) { case ProfilePictureView.LARGE: switchToPresetSize(ProfilePictureView.NORMAL); break; case ProfilePictureView.NORMAL: switchToPresetSize(ProfilePictureView.SMALL); break; } } }); largerButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { switch (profilePic.getPresetSize()) { case ProfilePictureView.NORMAL: switchToPresetSize(ProfilePictureView.LARGE); break; case ProfilePictureView.SMALL: switchToPresetSize(ProfilePictureView.NORMAL); break; } } }); // We will fetch a new image for each change in the SeekBar. So keeping the count low // to prevent too much network chatter. SeekBar reports 0-max, so we will get max+1 // notifications of change. customSizeView.setMax(MAX_CUSTOM_SIZES); customSizeView.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() { @Override public void onProgressChanged(SeekBar seekBar, int i, boolean b) { updateProfilePicForCustomSizeIncrement(i); } @Override public void onStartTrackingTouch(SeekBar seekBar) { // NO-OP } @Override public void onStopTrackingTouch(SeekBar seekBar) { // NO-OP } }); restoreState(savedInstanceState); return fragmentView; } @Override public void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); // Store the size type since we will use that to switch the Fragment's UI // between CUSTOM & PRESET modes // Other state (userId & isCropped) will be saved/restored directly by // ProfilePictureView outState.putInt(PICTURE_SIZE_TYPE_KEY, pictureSizeType); } private void restoreState(Bundle savedInstanceState) { if (savedInstanceState != null) { // Is we have saved state, restore the Fragment to it. // UserId & isCropped will be restored directly by ProfilePictureView pictureSizeType = savedInstanceState.getInt(PICTURE_SIZE_TYPE_KEY, ProfilePictureView.LARGE); if (pictureSizeType == ProfilePictureView.CUSTOM) { switchToCustomSize(); } else { switchToPresetSize(pictureSizeType); } } else { // No saved state. Let's go to a default state switchToPresetSize(ProfilePictureView.LARGE); profilePic.setCropped(cropToggle.isChecked()); // Setting userId last so that only one network request is sent profilePic.setProfileId(firstUserId); } } private void setupUserButton(Button b) { b.setOnClickListener(new Button.OnClickListener() { @Override public void onClick(View v) { Object tag = v.getTag(); String userId = null; if (tag != null) { userId = tag.toString(); } else { // Random id. userId = INTERESTING_IDS[randomGenerator.nextInt(INTERESTING_IDS.length)]; } profilePic.setProfileId(userId); } }); } private void switchToCustomSize() { pictureSizeType = ProfilePictureView.CUSTOM; presetSizeView.setVisibility(View.GONE); customSizeView.setVisibility(View.VISIBLE); profilePic.setPresetSize(pictureSizeType); customSizeView.setProgress(DEFAULT_SIZE_INCREMENT); updateProfilePicForCustomSizeIncrement(DEFAULT_SIZE_INCREMENT); } private void switchToPresetSize(int sizeType) { customSizeView.setVisibility(View.GONE); presetSizeView.setVisibility(View.VISIBLE); switch (sizeType) { case ProfilePictureView.SMALL: largerButton.setEnabled(true); smallerButton.setEnabled(false); sizeLabel.setText("small img"); pictureSizeType = sizeType; break; case ProfilePictureView.NORMAL: largerButton.setEnabled(true); smallerButton.setEnabled(true); sizeLabel.setText("normal img"); pictureSizeType = sizeType; break; case ProfilePictureView.LARGE: default: largerButton.setEnabled(false); smallerButton.setEnabled(true); sizeLabel.setText("large img"); pictureSizeType = ProfilePictureView.LARGE; break; } LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(0, ViewGroup.LayoutParams.WRAP_CONTENT, 1); profilePic.setLayoutParams(params); profilePic.setPresetSize(pictureSizeType); } private void updateProfilePicForCustomSizeIncrement(int i) { if (pictureSizeType != ProfilePictureView.CUSTOM) { return; } // This will ensure a minimum size of 51x68 and will scale the image at // a ratio of 3:4 (w:h) as the SeekBar is moved. // // Completely arbitrary // // NOTE: The numbers are in dips. float width = (i * 21) + 51; float height = (i * 28) + 68; LinearLayout.LayoutParams params = new LinearLayout.LayoutParams( (int) (width * getResources().getDisplayMetrics().density), (int) (height * getResources().getDisplayMetrics().density)); profilePic.setLayoutParams(params); } }