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Rolf-SmitRolf-Smit
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- Added support for specialized Fragment TaskManager;
- Added a specialized task handling activity (TaskActivity) and fragment (TaskFragment) class; - Moved some internally used classes to the "internal" package; - Added a TaskManagerLifeCycleProxy class to implement the TaskActivity or TaskFragment behavior on any Fragment or AppCompatActivity which is already extended by some other library or something like that; - Some other small API improvements;
1 parent dc399c6 commit 2f9f73b

17 files changed

+722
-64
lines changed

‎demo/src/main/AndroidManifest.xml

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android:label="@string/app_name"
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android:supportsRtl="true"
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android:theme="@style/AppTheme">
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<activity
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android:name=".ActivityWithFragments"
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android:label="@string/app_name"
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android:theme="@style/AppTheme">
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</activity>
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<activity
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android:name=".Main"
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android:label="@string/app_name"

‎demo/src/main/java/org/neotech/app/retainabletasksdemo/ActivityWithFragments.java

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package org.neotech.app.retainabletasksdemo;
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import android.content.res.Configuration;
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import android.os.Bundle;
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import android.support.design.widget.NavigationView;
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import android.support.v4.app.Fragment;
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import android.support.v4.app.FragmentManager;
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import android.support.v4.app.FragmentTransaction;
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import android.support.v4.view.GravityCompat;
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import android.support.v4.widget.DrawerLayout;
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import android.support.v7.app.ActionBarDrawerToggle;
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import android.support.v7.app.AppCompatActivity;
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import android.util.Log;
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import android.view.MenuItem;
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import android.view.View;
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import java.util.HashMap;
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public class ActivityWithFragments extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {
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private static final String[] FRAGMENT_TAGS = new String[]{"Fragment 1", "Fragment 2", "Fragment 3"};
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private FragmentAdapter adapter;
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private ActionBarDrawerToggle toggle;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_with_fragments);
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adapter = new FragmentAdapter(getSupportFragmentManager(), R.id.fragment_container, 3);
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for (String FRAGMENT_TAG : FRAGMENT_TAGS) {
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adapter.addFragment(FRAGMENT_TAG, TestFragment.class);
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}
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DrawerLayout drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
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getSupportActionBar().setDisplayHomeAsUpEnabled(true);
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toggle = new ActionBarDrawerToggle(this, drawerLayout, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
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drawerLayout.addDrawerListener(toggle);
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NavigationView drawer = (NavigationView) findViewById(R.id.nav_view);
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drawer.setNavigationItemSelectedListener(this);
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drawer.getHeaderView(0).setVisibility(View.GONE);
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if(savedInstanceState == null){
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adapter.setCurrentFragment(FRAGMENT_TAGS[0]);
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drawer.setCheckedItem(R.id.nav_fragment_1);
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setTitle(FRAGMENT_TAGS[0]);
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} else {
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setTitle(adapter.getCurrentFragment().getTag());
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}
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}
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public void setTitle(String title){
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getSupportActionBar().setTitle(title);
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}
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@Override
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protected void onPostCreate(Bundle savedInstanceState) {
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super.onPostCreate(savedInstanceState);
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toggle.syncState();
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}
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@Override
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public void onBackPressed() {
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DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
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if (drawer.isDrawerOpen(GravityCompat.START)) {
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drawer.closeDrawer(GravityCompat.START);
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} else {
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super.onBackPressed();
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}
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}
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@Override
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public void onConfigurationChanged(Configuration newConfig) {
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super.onConfigurationChanged(newConfig);
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toggle.onConfigurationChanged(newConfig);
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}
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@Override
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public boolean onOptionsItemSelected(MenuItem item) {
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final int id = item.getItemId();
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if (id == android.R.id.home) {
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final DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
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final NavigationView navigation = (NavigationView) findViewById(R.id.nav_view);
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if (drawer.isDrawerOpen(navigation)) {
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drawer.closeDrawer(navigation);
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} else {
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drawer.openDrawer(navigation);
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}
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return true;
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}
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return super.onOptionsItemSelected(item);
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}
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@SuppressWarnings("StatementWithEmptyBody")
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@Override
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public boolean onNavigationItemSelected(MenuItem item) {
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// Handle navigation view item clicks here.
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int id = item.getItemId();
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if (id == R.id.nav_fragment_1) {
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adapter.setCurrentFragment(FRAGMENT_TAGS[0]);
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setTitle(FRAGMENT_TAGS[0]);
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} else if (id == R.id.nav_fragment_2) {
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adapter.setCurrentFragment(FRAGMENT_TAGS[1]);
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setTitle(FRAGMENT_TAGS[1]);
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} else if (id == R.id.nav_fragment_3) {
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adapter.setCurrentFragment(FRAGMENT_TAGS[2]);
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setTitle(FRAGMENT_TAGS[2]);
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}
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DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
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drawer.closeDrawer(GravityCompat.START);
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return true;
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}
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@Override
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protected void onStart() {
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super.onStart();
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}
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public static class FragmentAdapter {
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private final HashMap<String, Class<? extends Fragment>> fragments;
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private final FragmentManager fragmentManager;
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private final int containerId;
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public FragmentAdapter(FragmentManager fragmentManager, int containerViewId){
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this(fragmentManager, containerViewId, 4);
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}
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public FragmentAdapter(FragmentManager fragmentManager, int containerViewId, int initialSize){
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this.fragments = new HashMap<>(initialSize);
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this.fragmentManager = fragmentManager;
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this.containerId = containerViewId;
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}
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public void addFragment(String tag, Class<? extends Fragment> fragmentClass){
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fragments.put(tag, fragmentClass);
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}
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public int size(){
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return fragments.size();
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}
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public Fragment getFragment(String tag){
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return fragmentManager.findFragmentByTag(tag);
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}
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public Fragment getCurrentFragment(){
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return fragmentManager.findFragmentById(containerId);
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}
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public Fragment setCurrentFragment(String tag){
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//Retrieve the existing fragment or create a new one.
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Fragment fragment = fragmentManager.findFragmentByTag(tag);
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if(fragment == null) {
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fragment = instantiate(fragments.get(tag));
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}
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//Check if the currently visible fragment is not equal to the fragment we're about to show.
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if(fragment.equals(fragmentManager.findFragmentById(containerId))){
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Log.i("FragmentAdapter", "Fragment '" + tag + "' not shown because it's already visible.");
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return fragment;
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}
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//Show the new fragment.
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fragmentManager.beginTransaction()
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.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN)
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.replace(containerId, fragment, tag)
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.commit();
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return fragment;
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}
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private static Fragment instantiate(Class<? extends Fragment> classType) {
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try {
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return classType.newInstance();
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} catch(Exception e) {
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throw new Fragment.InstantiationException("Unable to instantiate fragment " + classType.getName() + ": make sure class name exists, is public, and has an empty constructor that is public", e);
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}
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}
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}
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}

‎demo/src/main/java/org/neotech/app/retainabletasksdemo/Main.java

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package org.neotech.app.retainabletasksdemo;
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import android.annotation.SuppressLint;
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import android.content.Intent;
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import android.net.Uri;
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import android.os.Bundle;
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import android.support.design.widget.FloatingActionButton;
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import android.support.annotation.NonNull;
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import android.support.design.widget.Snackbar;
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import android.support.v4.app.DialogFragment;
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import android.support.v7.app.AppCompatActivity;
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import android.support.v7.widget.Toolbar;
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import android.view.View;
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import android.widget.Button;
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import org.neotech.app.retainabletasksdemo.tasks.SimpleTask;
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import org.neotech.app.retainabletasksdemo.tasks.TaskWithoutCallback;
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import org.neotech.library.retainabletasks.Task;
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import org.neotech.library.retainabletasks.TaskActivity;
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import org.neotech.library.retainabletasks.TaskExecutor;
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import org.neotech.library.retainabletasks.TaskManager;
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public class Main extends AppCompatActivity implements View.OnClickListener, Task.AdvancedCallback, OnAlertDialogClickListener {
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public class Main extends TaskActivity implements View.OnClickListener, Task.AdvancedCallback, OnAlertDialogClickListener {
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private static final String TASK_RETAIN_UI_STATE = "retain-ui-state";
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private static final String TASK_PROGRESS = "progress-dialog";
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setContentView(R.layout.activity_main);
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setSupportActionBar((Toolbar) findViewById(R.id.toolbar));
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findViewById(R.id.button_open_fragment_activity).setOnClickListener(this);
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findViewById(R.id.fab).setOnClickListener(this);
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findViewById(R.id.button_no_ui_task).setOnClickListener(this);
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findViewById(R.id.button_progress_task).setOnClickListener(this);
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retainUserInterfaceButton.setOnClickListener(this);
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}
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/*
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@Override
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protected void onStart() {
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super.onStart();
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progressDialog = ProgressDialog.getExistingInstance(getSupportFragmentManager(), DIALOG_PROGRESS);
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getTaskManager().attachListener(TASK_PROGRESS, this);
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}
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getTaskManager().attach(TASK_PROGRESS, this);
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getTaskManager().attachListener(TASK_RETAIN_UI_STATE, new TaskManager.TaskAttachListener() {
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getTaskManager().attach(TASK_RETAIN_UI_STATE, new TaskManager.TaskAttachListener() {
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@Override
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public Task.Callback onPreAttach(Task<?, ?> task) {
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/**
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* the onPreAttach method will only be called if the task did not deliver its result
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* and thus is still available/referenced by the TaskManger.
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*
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* At this point the UI can be restored to the "task is running" state.
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*/
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if (!task.isResultDelivered()) { //This call isn't necessary.
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retainUserInterfaceButton.setEnabled(false);
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retainUserInterfaceButton.setText("" + task.getLastKnownProgress());
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}
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});
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}
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*/
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@Override
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public Task.Callback onPreAttach(@NonNull Task<?, ?> task) {
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if(task.getTag().equals(TASK_RETAIN_UI_STATE)){
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/**
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* the onPreAttach method will only be called if the task did not deliver its result
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* and thus is still available/referenced by the TaskManger.
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*
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* At this point the UI can be restored to the "task is running" state.
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*/
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if (!task.isResultDelivered()) { //This call isn't necessary.
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retainUserInterfaceButton.setEnabled(false);
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retainUserInterfaceButton.setText("" + task.getLastKnownProgress());
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}
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} else if(task.getTag().equals(TASK_PROGRESS)){
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progressDialog = ProgressDialog.getExistingInstance(getSupportFragmentManager(), DIALOG_PROGRESS);
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}
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return this;
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}
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@Override
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public void onClick(View v) {
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88105
CountDownTask task = new CountDownTask(TASK_RETAIN_UI_STATE, 10);
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getTaskManager().execute(task, this);
90107
retainUserInterfaceButton.setEnabled(false);
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} else if(id == R.id.button_open_fragment_activity){
109+
startActivity(new Intent(this, ActivityWithFragments.class));
91110
}
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}
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94-
public TaskManager getTaskManager(){
95-
return TaskManager.getActivityTaskManager(getSupportFragmentManager());
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}
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@Override
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public void onPreExecute(Task<?, ?> task) {
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if(task.getTag().equals(TASK_PROGRESS)) {

‎demo/src/main/java/org/neotech/app/retainabletasksdemo/TestFragment.java

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package org.neotech.app.retainabletasksdemo;
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import android.os.Bundle;
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import android.support.annotation.NonNull;
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import android.support.annotation.Nullable;
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import android.support.design.widget.Snackbar;
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import android.view.LayoutInflater;
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import android.view.View;
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import android.view.ViewGroup;
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import android.widget.Button;
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import org.neotech.app.retainabletasksdemo.tasks.CountDownTask;
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import org.neotech.library.retainabletasks.Task;
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import org.neotech.library.retainabletasks.TaskFragment;
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/**
17+
* Created by Rolf on 3-3-2016.
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*/
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public class TestFragment extends TaskFragment implements View.OnClickListener, Task.AdvancedCallback {
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private Button button;
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@Nullable
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@Override
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public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
26+
View view = inflater.inflate(R.layout.fragment_test, container, false);
27+
button = (Button) view.findViewById(R.id.button_task);
28+
button.setOnClickListener(this);
29+
return view;
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}
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32+
@Override
33+
public void onClick(View v) {
34+
CountDownTask task = new CountDownTask("CountDownTask", 10);
35+
getTaskManager().execute(task, this);
36+
button.setEnabled(false);
37+
}
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@Override
40+
public Task.Callback onPreAttach(@NonNull Task<?, ?> task) {
41+
button.setEnabled(false);
42+
button.setText("" + task.getLastKnownProgress());
43+
return this;
44+
}
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46+
@Override
47+
public void onPreExecute(Task<?, ?> task) {
48+
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}
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@Override
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public void onPostExecute(Task<?, ?> task) {
53+
button.setEnabled(true);
54+
button.setText(R.string.task_fragment_based);
55+
Snackbar.make(getView(), getString(R.string.toast_task_finished, getString(R.string.task_fragment_based)), Snackbar.LENGTH_LONG).show();
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}
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@Override
59+
public void onCanceled(Task<?, ?> task) {
60+
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}
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@Override
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public void onProgressUpdate(Task<?, ?> task, Object progress) {
65+
button.setText("" + (int) progress);
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}
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}

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