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Code Issues Projects Releases Wiki Activity

Improve UI hiding behaviour.

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This commit is contained in:
akwizgran
2018-11-29 18:01:46 +00:00
parent 008cf95741
commit dcd5e34c6b
5 changed files with 95 additions and 21 deletions
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54
briar-android/src/main/java/org/briarproject/briar/android/BackgroundMonitor.java Normal file
View File

@@ -0,0 +1,54 @@
package org.briarproject.briar.android;
import android.app.Activity;
import android.app.Application.ActivityLifecycleCallbacks;
import android.os.Bundle;
import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
import java.util.concurrent.atomic.AtomicInteger;
import javax.annotation.Nullable;
import javax.annotation.concurrent.ThreadSafe;
@ThreadSafe
@NotNullByDefault
class BackgroundMonitor implements ActivityLifecycleCallbacks {
private final AtomicInteger foregroundActivities = new AtomicInteger(0);
boolean isRunningInBackground() {
return foregroundActivities.get() == 0;
}
@Override
public void onActivityCreated(Activity a, @Nullable Bundle state) {
}
@Override
public void onActivityStarted(Activity a) {
foregroundActivities.incrementAndGet();
}
@Override
public void onActivityResumed(Activity a) {
}
@Override
public void onActivityPaused(Activity a) {
}
@Override
public void onActivityStopped(Activity a) {
foregroundActivities.decrementAndGet();
}
@Override
public void onActivitySaveInstanceState(Activity a,
@Nullable Bundle outState) {
}
@Override
public void onActivityDestroyed(Activity a) {
}
}

2
briar-android/src/main/java/org/briarproject/briar/android/BriarApplication.java
View File

@@ -16,4 +16,6 @@ public interface BriarApplication {
AndroidComponent getApplicationComponent();
SharedPreferences getDefaultSharedPreferences();
boolean isRunningInBackground();
}

19
briar-android/src/main/java/org/briarproject/briar/android/BriarApplicationImpl.java
View File

@@ -1,5 +1,7 @@
package org.briarproject.briar.android;
import android.app.ActivityManager;
import android.app.ActivityManager.RunningAppProcessInfo;
import android.app.Application;
import android.content.Context;
import android.content.SharedPreferences;
@@ -30,6 +32,8 @@ import java.util.logging.Handler;
import java.util.logging.LogRecord;
import java.util.logging.Logger;
import static android.app.ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND;
import static android.os.Build.VERSION.SDK_INT;
import static java.util.logging.Level.FINE;
import static java.util.logging.Level.INFO;
import static org.acra.ReportField.ANDROID_VERSION;
@@ -79,6 +83,7 @@ public class BriarApplicationImpl extends Application
Logger.getLogger(BriarApplicationImpl.class.getName());
private final CachingLogHandler logHandler = new CachingLogHandler();
private final BackgroundMonitor backgroundMonitor = new BackgroundMonitor();
private AndroidComponent applicationComponent;
private volatile SharedPreferences prefs;
@@ -115,6 +120,9 @@ public class BriarApplicationImpl extends Application
applicationComponent = createApplicationComponent();
EmojiManager.install(new GoogleEmojiProvider());
if (SDK_INT < 16)
registerActivityLifecycleCallbacks(backgroundMonitor);
}
protected AndroidComponent createApplicationComponent() {
@@ -173,4 +181,15 @@ public class BriarApplicationImpl extends Application
public SharedPreferences getDefaultSharedPreferences() {
return prefs;
}
@Override
public boolean isRunningInBackground() {
if (SDK_INT >= 16) {
RunningAppProcessInfo info = new RunningAppProcessInfo();
ActivityManager.getMyMemoryState(info);
return (info.importance != IMPORTANCE_FOREGROUND);
} else {
return backgroundMonitor.isRunningInBackground();
}
}
}

36
briar-android/src/main/java/org/briarproject/briar/android/BriarService.java
View File

@@ -1,7 +1,5 @@
package org.briarproject.briar.android;
import android.app.ActivityManager;
import android.app.ActivityManager.RunningAppProcessInfo;
import android.app.Notification;
import android.app.NotificationChannel;
import android.app.NotificationManager;
@@ -35,7 +33,6 @@ import java.util.logging.Logger;
import javax.annotation.Nullable;
import javax.inject.Inject;
import static android.app.ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND;
import static android.app.NotificationManager.IMPORTANCE_DEFAULT;
import static android.app.NotificationManager.IMPORTANCE_NONE;
import static android.app.PendingIntent.FLAG_UPDATE_CURRENT;
@@ -74,6 +71,7 @@ public class BriarService extends Service {
@Nullable
private BroadcastReceiver receiver = null;
private BriarApplication app;
@Inject
AndroidNotificationManager notificationManager;
@@ -93,8 +91,8 @@ public class BriarService extends Service {
public void onCreate() {
super.onCreate();
BriarApplication application = (BriarApplication) getApplication();
application.getApplicationComponent().inject(this);
app = (BriarApplication) getApplication();
app.getApplicationComponent().inject(this);
LOG.info("Created");
if (created.getAndSet(true)) {
@@ -220,8 +218,8 @@ public class BriarService extends Service {
public void onLowMemory() {
super.onLowMemory();
LOG.warning("Memory is low");
// Clear the UI - this is done in onTrimMemory() if SDK_INT >= 16
if (SDK_INT < 16) hideUi();
// If we're not in the foreground, clear the UI to save memory
if (app.isRunningInBackground()) hideUi();
}
@Override
@@ -235,20 +233,16 @@ public class BriarService extends Service {
LOG.info("Trim memory: near middle of LRU list");
} else if (level == TRIM_MEMORY_COMPLETE) {
LOG.info("Trim memory: near end of LRU list");
} else if (SDK_INT >= 16) {
if (level == TRIM_MEMORY_RUNNING_MODERATE) {
LOG.info("Trim memory: running moderately low");
} else if (level == TRIM_MEMORY_RUNNING_LOW) {
LOG.info("Trim memory: running low");
} else if (level == TRIM_MEMORY_RUNNING_CRITICAL) {
LOG.info("Trim memory: running critically low");
// If we're not in the foreground, clear the UI to save memory
RunningAppProcessInfo info = new RunningAppProcessInfo();
ActivityManager.getMyMemoryState(info);
if (info.importance != IMPORTANCE_FOREGROUND) hideUi();
} else if (LOG.isLoggable(INFO)) {
LOG.info("Trim memory: unknown level " + level);
}
} else if (level == TRIM_MEMORY_RUNNING_MODERATE) {
LOG.info("Trim memory: running moderately low");
} else if (level == TRIM_MEMORY_RUNNING_LOW) {
LOG.info("Trim memory: running low");
} else if (level == TRIM_MEMORY_RUNNING_CRITICAL) {
// This level may be received if SDK_INT < 16, although the
// constant isn't declared until API level 16
LOG.warning("Trim memory: running critically low");
// If we're not in the foreground, clear the UI to save memory
if (app.isRunningInBackground()) hideUi();
} else if (LOG.isLoggable(INFO)) {
LOG.info("Trim memory: unknown level " + level);
}

5
briar-android/src/test/java/org/briarproject/briar/android/TestBriarApplication.java
View File

@@ -63,4 +63,9 @@ public class TestBriarApplication extends Application
public SharedPreferences getDefaultSharedPreferences() {
return prefs;
}
@Override
public boolean isRunningInBackground() {
return false;
}
}