Java tutorial
package cc.metapro.openct.classdetail; /* * Copyright 2016 - 2017 OpenCT open source class table * * 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. */ import android.content.Context; import android.content.Intent; import android.os.Bundle; import android.support.annotation.ColorInt; import android.support.design.widget.BaseTransientBottomBar; import android.support.design.widget.FloatingActionButton; import android.support.design.widget.Snackbar; import android.support.v4.util.ArraySet; import android.support.v7.widget.Toolbar; import android.util.Log; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.Window; import android.widget.Toast; import com.jrummyapps.android.colorpicker.ColorPickerDialog; import com.jrummyapps.android.colorpicker.ColorPickerDialogListener; import com.rengwuxian.materialedittext.MaterialEditText; import com.yanzhenjie.recyclerview.swipe.SwipeMenuRecyclerView; import com.yanzhenjie.recyclerview.swipe.touch.OnItemMoveListener; import java.util.ArrayList; import java.util.Collections; import java.util.List; import butterknife.BindView; import butterknife.ButterKnife; import butterknife.OnClick; import cc.metapro.openct.R; import cc.metapro.openct.data.source.local.DBManger; import cc.metapro.openct.data.university.model.classinfo.ClassTime; import cc.metapro.openct.data.university.model.classinfo.EnrichedClassInfo; import cc.metapro.openct.utils.Constants; import cc.metapro.openct.utils.DateHelper; import cc.metapro.openct.utils.RecyclerViewHelper; import cc.metapro.openct.utils.base.BaseActivity; public class ClassDetailActivity extends BaseActivity { private static final String KEY_CLASS_NAME = "class_name"; private static final String TAG = ClassDetailActivity.class.getName(); @BindView(R.id.toolbar) Toolbar mToolbar; @BindView(R.id.recycler_view) SwipeMenuRecyclerView mRecyclerView; @BindView(R.id.content) MaterialEditText mName; @BindView(R.id.type) MaterialEditText mType; @BindView(R.id.bg) FloatingActionButton mBackground; private ClassDetailAdapter mDetailAdapter; private EnrichedClassInfo mInfoEditing; private List<ClassTime> mClassTimes; private String mOldName; public static void actionStart(Context context, String name) { Intent intent = new Intent(context, ClassDetailActivity.class); intent.putExtra(KEY_CLASS_NAME, name); context.startActivity(intent); } @Override protected void onCreate(Bundle savedInstanceState) { requestWindowFeature(Window.FEATURE_NO_TITLE); super.onCreate(savedInstanceState); ButterKnife.bind(this); setSupportActionBar(mToolbar); } @Override protected int getLayout() { return R.layout.activity_class_detail; } @OnClick(R.id.bg) void showColorPicker() { ColorPickerDialog dialog = ColorPickerDialog.newBuilder().setColor(mInfoEditing.getColor()).create(); dialog.setColorPickerDialogListener(new ColorPickerDialogListener() { @Override public void onColorSelected(int dialogId, @ColorInt int color) { mInfoEditing.setColor(color); mBackground.setColorFilter(color); } @Override public void onDialogDismissed(int dialogId) { } }); dialog.show(getFragmentManager(), "color_picker"); } @Override protected void onResume() { super.onResume(); mOldName = getIntent().getStringExtra(KEY_CLASS_NAME); mInfoEditing = DBManger.getInstance(this).getSingleClass(mOldName); if (mInfoEditing == null) { mInfoEditing = new EnrichedClassInfo(getString(R.string.new_class), getString(R.string.mandatory), new ClassTime()); } mClassTimes = new ArrayList<>(mInfoEditing.getTimeSet()); Collections.sort(mClassTimes); mName.setText(mInfoEditing.getName()); mType.setText(mInfoEditing.getType()); mBackground.setColorFilter(mInfoEditing.getColor()); setRecyclerView(); } private void setRecyclerView() { mDetailAdapter = new ClassDetailAdapter(this, mClassTimes); RecyclerViewHelper.setRecyclerView(this, mRecyclerView, mDetailAdapter); mRecyclerView.setItemViewSwipeEnabled(true); mRecyclerView.setOnItemMoveListener(new OnItemMoveListener() { @Override public boolean onItemMove(int fromPosition, int toPosition) { return false; } @Override public void onItemDismiss(final int position) { final ClassTime toRemove = mClassTimes.get(position); mClassTimes.remove(toRemove); mDetailAdapter.notifyDataSetChanged(); final String prefix = mName.getText().toString() + " " + DateHelper.weekDayTrans(ClassDetailActivity.this, toRemove.getWeekDay()) + " " + toRemove.getTimeString() + " "; String msg = prefix + getString(R.string.deleted); final Snackbar snackbar = Snackbar.make(mRecyclerView, msg, BaseTransientBottomBar.LENGTH_INDEFINITE); snackbar.setAction(android.R.string.cancel, new View.OnClickListener() { @Override public void onClick(View v) { mClassTimes.add(toRemove); mDetailAdapter.notifyDataSetChanged(); snackbar.dismiss(); String msg = prefix + getString(R.string.restored); Snackbar.make(mRecyclerView, msg, BaseTransientBottomBar.LENGTH_LONG).show(); mRecyclerView.smoothScrollToPosition(mClassTimes.size() - 1); } }); snackbar.show(); } }); } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.class_detail, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { int id = item.getItemId(); if (id == R.id.add) { if (!mClassTimes.isEmpty()) { mClassTimes.add(0, new ClassTime(mClassTimes.get(mClassTimes.size() - 1))); } else { mClassTimes.add(0, new ClassTime()); } mDetailAdapter.notifyDataSetChanged(); } return super.onOptionsItemSelected(item); } @Override public void onBackPressed() { mInfoEditing.setName(mName.getText().toString()); mInfoEditing.setType(mType.getText().toString()); mInfoEditing.setTimes(new ArraySet<>(mClassTimes)); try { if (mClassTimes == null || mClassTimes.isEmpty()) { try { DBManger.getInstance(this).updateSingleClass(mOldName, "", null); } catch (Exception e) { Log.d(TAG, e.getMessage(), e); } } else { try { DBManger.getInstance(this).updateSingleClass(mOldName, mInfoEditing.getName(), mInfoEditing); } catch (Exception e) { Log.d(TAG, e.getMessage(), e); Toast.makeText(this, R.string.class_with_same_name, Toast.LENGTH_LONG).show(); return; } } } finally { Constants.sClasses.setInfoByName(mOldName, mInfoEditing); } super.onBackPressed(); } }