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Restore the demo list position on start

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It's quite anoying to have to search in the list
the last item played everytime the demo is restarted.

Fix that by saving and restoring it.

PiperOrigin-RevId: 299109261
This commit is contained in:
krocard 2020-03-05 16:30:16 +00:00 committed by Oliver Woodman
parent 47b62e8c02
commit 1f4156ce6d
2 changed files with 28 additions and 1 deletions
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1
RELEASENOTES.md
View File

@ -90,6 +90,7 @@
([#6920](https://github.com/google/ExoPlayer/issues/6920)).
* Metadata: Add minimal DVB Application Information Table (AIT) support
([#6922](https://github.com/google/ExoPlayer/pull/6922)).
* The demo app startup selected item is the last played one.
### 2.11.3 (2020-02-19) ###

28
demos/main/src/main/java/com/google/android/exoplayer2/demo/SampleChooserActivity.java
View File

@ -17,6 +17,7 @@ package com.google.android.exoplayer2.demo;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.res.AssetManager;
import android.net.Uri;
import android.os.AsyncTask;
@ -62,6 +63,8 @@ public class SampleChooserActivity extends AppCompatActivity
implements DownloadTracker.Listener, OnChildClickListener {
private static final String TAG = "SampleChooserActivity";
private static final String GROUP_POSITION_PREFERENCE_KEY = "SAMPLE_CHOOSER_GROUP_POSITION";
private static final String CHILD_POSITION_PREFERENCE_KEY = "SAMPLE_CHOOSER_CHILD_POSITION";
private boolean useExtensionRenderers;
private DownloadTracker downloadTracker;
@ -69,13 +72,15 @@ public class SampleChooserActivity extends AppCompatActivity
private MenuItem preferExtensionDecodersMenuItem;
private MenuItem randomAbrMenuItem;
private MenuItem tunnelingMenuItem;
private ExpandableListView sampleListView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.sample_chooser_activity);
sampleAdapter = new SampleAdapter();
ExpandableListView sampleListView = findViewById(R.id.sample_list);
sampleListView = findViewById(R.id.sample_list);
sampleListView.setAdapter(sampleAdapter);
sampleListView.setOnChildClickListener(this);
@ -163,11 +168,32 @@ public class SampleChooserActivity extends AppCompatActivity
.show();
}
sampleAdapter.setSampleGroups(groups);
SharedPreferences preferences = getPreferences(MODE_PRIVATE);
int groupPosition = -1;
int childPosition = -1;
try {
groupPosition = preferences.getInt(GROUP_POSITION_PREFERENCE_KEY, /* defValue= */ -1);
childPosition = preferences.getInt(CHILD_POSITION_PREFERENCE_KEY, /* defValue= */ -1);
} catch (ClassCastException e) {
android.util.Log.w(TAG, "Saved position is not an int. Will not restore position.", e);
}
if (groupPosition != -1 && childPosition != -1) {
sampleListView.expandGroup(groupPosition); // shouldExpandGroup does not work without this.
sampleListView.setSelectedChild(groupPosition, childPosition, /* shouldExpandGroup= */ true);
}
}
@Override
public boolean onChildClick(
ExpandableListView parent, View view, int groupPosition, int childPosition, long id) {
// Save the selected item first to be able to restore it if the tested code crashes.
SharedPreferences.Editor prefEditor = getPreferences(MODE_PRIVATE).edit();
prefEditor.putInt(GROUP_POSITION_PREFERENCE_KEY, groupPosition);
prefEditor.putInt(CHILD_POSITION_PREFERENCE_KEY, childPosition);
prefEditor.apply();
Sample sample = (Sample) view.getTag();
Intent intent = new Intent(this, PlayerActivity.class);
intent.putExtra(