Add button for opening Huawei battery settings during setup.

briar-android/src/main/java/org/briarproject/briar/android/account/DozeFragment.java

@@ -30,7 +30,8 @@ public class DozeFragment extends SetupFragment
 	private final static String TAG = DozeFragment.class.getName();
 
 	private DozeView dozeView;
-	private HuaweiView huaweiView;
+	private HuaweiProtectedAppsView huaweiProtectedAppsView;
+	private HuaweiAppLaunchView huaweiAppLaunchView;
 	private Button next;
 	private boolean secondAttempt = false;
 
@@ -48,8 +49,10 @@ public class DozeFragment extends SetupFragment
 				false);
 		dozeView = v.findViewById(R.id.dozeView);
 		dozeView.setOnCheckedChangedListener(this);
-		huaweiView = v.findViewById(R.id.huaweiView);
-		huaweiView.setOnCheckedChangedListener(this);
+		huaweiProtectedAppsView = v.findViewById(R.id.huaweiProtectedAppsView);
+		huaweiProtectedAppsView.setOnCheckedChangedListener(this);
+		huaweiAppLaunchView = v.findViewById(R.id.huaweiAppLaunchView);
+		huaweiAppLaunchView.setOnCheckedChangedListener(this);
 		next = v.findViewById(R.id.next);
 		ProgressBar progressBar = v.findViewById(R.id.progress);
 
@@ -93,7 +96,9 @@ public class DozeFragment extends SetupFragment
 
 	@Override
 	public void onCheckedChanged() {
-		next.setEnabled(dozeView.isChecked() && huaweiView.isChecked());
+		next.setEnabled(dozeView.isChecked() &&
+				huaweiProtectedAppsView.isChecked() &&
+				huaweiAppLaunchView.isChecked());
 	}
 
 	@SuppressLint("BatteryLife")

briar-android/src/main/java/org/briarproject/briar/android/account/DozeHelperImpl.java

@@ -2,13 +2,14 @@ package org.briarproject.briar.android.account;
 
 import android.content.Context;
 
-import static org.briarproject.briar.android.account.HuaweiView.needsToBeShown;
 import static org.briarproject.briar.android.util.UiUtils.needsDozeWhitelisting;
 
 class DozeHelperImpl implements DozeHelper {
 	@Override
 	public boolean needToShowDozeFragment(Context context) {
-		return needsDozeWhitelisting(context.getApplicationContext()) ||
-				needsToBeShown(context.getApplicationContext());
+		Context appContext = context.getApplicationContext();
+		return needsDozeWhitelisting(appContext) ||
+				HuaweiProtectedAppsView.needsToBeShown(appContext) ||
+				HuaweiAppLaunchView.needsToBeShown(appContext);
 	}
 }

briar-android/src/main/java/org/briarproject/briar/android/account/HuaweiAppLaunchView.java

@@ -0,0 +1,78 @@
+package org.briarproject.briar.android.account;
+
+
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.util.AttributeSet;
+
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.briar.R;
+
+import java.util.List;
+
+import javax.annotation.Nullable;
+
+import androidx.annotation.StringRes;
+import androidx.annotation.UiThread;
+
+import static android.content.pm.PackageManager.MATCH_DEFAULT_ONLY;
+import static android.os.Build.VERSION.SDK_INT;
+
+@UiThread
+@NotNullByDefault
+class HuaweiAppLaunchView extends PowerView {
+
+	private final static String PACKAGE_NAME = "com.huawei.systemmanager";
+	private final static String CLASS_NAME =
+			PACKAGE_NAME + ".power.ui.HwPowerManagerActivity";
+
+	public HuaweiAppLaunchView(Context context) {
+		this(context, null);
+	}
+
+	public HuaweiAppLaunchView(Context context, @Nullable AttributeSet attrs) {
+		this(context, attrs, 0);
+	}
+
+	public HuaweiAppLaunchView(Context context, @Nullable AttributeSet attrs,
+			int defStyleAttr) {
+		super(context, attrs, defStyleAttr);
+		setText(R.string.setup_huawei_app_launch_text);
+		setButtonText(R.string.setup_huawei_app_launch_button);
+	}
+
+	@Override
+	public boolean needsToBeShown() {
+		return needsToBeShown(getContext());
+	}
+
+	public static boolean needsToBeShown(Context context) {
+		// "App launch" was introduced in EMUI 8 (Android 8.0)
+		if (SDK_INT < 26) return false;
+		PackageManager pm = context.getPackageManager();
+		List<ResolveInfo> resolveInfos = pm.queryIntentActivities(getIntent(),
+				MATCH_DEFAULT_ONLY);
+		return !resolveInfos.isEmpty();
+	}
+
+	@Override
+	@StringRes
+	protected int getHelpText() {
+		return R.string.setup_huawei_app_launch_help;
+	}
+
+	@Override
+	protected void onButtonClick() {
+		getContext().startActivity(getIntent());
+		setChecked(true);
+	}
+
+	private static Intent getIntent() {
+		Intent intent = new Intent();
+		intent.setClassName(PACKAGE_NAME, CLASS_NAME);
+		return intent;
+	}
+
+}

briar-android/src/main/java/org/briarproject/briar/android/account/HuaweiProtectedAppsView.java

@@ -17,25 +17,28 @@ import javax.annotation.Nullable;
 import androidx.annotation.StringRes;
 import androidx.annotation.UiThread;
 
+import static android.content.pm.PackageManager.MATCH_DEFAULT_ONLY;
 import static android.os.Build.VERSION.SDK_INT;
 
 @UiThread
 @NotNullByDefault
-class HuaweiView extends PowerView {
+class HuaweiProtectedAppsView extends PowerView {
 
 	private final static String PACKAGE_NAME = "com.huawei.systemmanager";
 	private final static String CLASS_NAME =
 			PACKAGE_NAME + ".optimize.process.ProtectActivity";
 
-	public HuaweiView(Context context) {
+	public HuaweiProtectedAppsView(Context context) {
 		this(context, null);
 	}
 
-	public HuaweiView(Context context, @Nullable AttributeSet attrs) {
+	public HuaweiProtectedAppsView(Context context,
+			@Nullable AttributeSet attrs) {
 		this(context, attrs, 0);
 	}
 
-	public HuaweiView(Context context, @Nullable AttributeSet attrs,
+	public HuaweiProtectedAppsView(Context context,
+			@Nullable AttributeSet attrs,
 			int defStyleAttr) {
 		super(context, attrs, defStyleAttr);
 		setText(R.string.setup_huawei_text);
@@ -52,7 +55,7 @@ class HuaweiView extends PowerView {
 		if (SDK_INT >= 24) return false;
 		PackageManager pm = context.getPackageManager();
 		List<ResolveInfo> resolveInfos = pm.queryIntentActivities(getIntent(),
-				PackageManager.MATCH_DEFAULT_ONLY);
+				MATCH_DEFAULT_ONLY);
 		return !resolveInfos.isEmpty();
 	}
 

briar-android/src/main/java/org/briarproject/briar/android/account/PowerView.java

@@ -43,7 +43,6 @@ abstract class PowerView extends ConstraintLayout {
 		this(context, attrs, 0);
 	}
 
-	@SuppressWarnings("ConstantConditions")
 	public PowerView(Context context, @Nullable AttributeSet attrs,
 			int defStyleAttr) {
 		super(context, attrs, defStyleAttr);
@@ -85,6 +84,7 @@ abstract class PowerView extends ConstraintLayout {
 		setChecked(ss.value[0]);  // also calls listener
 	}
 
+	@SuppressWarnings("BooleanMethodIsAlwaysInverted")
 	public abstract boolean needsToBeShown();
 
 	public void setChecked(boolean checked) {

briar-android/src/main/res/layout/fragment_setup_doze.xml

@@ -15,18 +15,29 @@
 			android:id="@+id/dozeView"
 			android:layout_width="match_parent"
 			android:layout_height="wrap_content"
+			android:paddingBottom="@dimen/margin_large"
 			app:layout_constraintEnd_toEndOf="parent"
 			app:layout_constraintStart_toStartOf="parent"
 			app:layout_constraintTop_toTopOf="parent" />
 
-		<org.briarproject.briar.android.account.HuaweiView
-			android:id="@+id/huaweiView"
+		<org.briarproject.briar.android.account.HuaweiProtectedAppsView
+			android:id="@+id/huaweiProtectedAppsView"
 			android:layout_width="match_parent"
 			android:layout_height="wrap_content"
+			android:paddingBottom="@dimen/margin_large"
 			app:layout_constraintEnd_toEndOf="parent"
 			app:layout_constraintStart_toStartOf="parent"
 			app:layout_constraintTop_toBottomOf="@+id/dozeView" />
 
+		<org.briarproject.briar.android.account.HuaweiAppLaunchView
+			android:id="@+id/huaweiAppLaunchView"
+			android:layout_width="match_parent"
+			android:layout_height="wrap_content"
+			android:paddingBottom="@dimen/margin_large"
+			app:layout_constraintEnd_toEndOf="parent"
+			app:layout_constraintStart_toStartOf="parent"
+			app:layout_constraintTop_toBottomOf="@+id/huaweiProtectedAppsView" />
+
 		<Button
 			android:id="@+id/next"
 			style="@style/BriarButton"
@@ -37,7 +48,7 @@
 			app:layout_constraintBottom_toBottomOf="parent"
 			app:layout_constraintEnd_toEndOf="parent"
 			app:layout_constraintStart_toStartOf="parent"
-			app:layout_constraintTop_toBottomOf="@+id/huaweiView"
+			app:layout_constraintTop_toBottomOf="@+id/huaweiAppLaunchView"
 			app:layout_constraintVertical_bias="1.0"
 			tools:enabled="true" />
 

briar-android/src/main/res/values/strings.xml

@@ -27,6 +27,9 @@
 	<string name="setup_huawei_text">Please tap the button below and make sure Briar is protected in the \"Protected Apps\" screen.</string>
 	<string name="setup_huawei_button">Protect Briar</string>
 	<string name="setup_huawei_help">If Briar is not added to the protected apps list, it will be unable to run in the background.</string>
+	<string name="setup_huawei_app_launch_text">Please tap the button below, open the \"App launch\" screen and make sure Briar is set to \"Manage manually\".</string>
+	<string name="setup_huawei_app_launch_button">Open Battery Settings</string>
+	<string name="setup_huawei_app_launch_help">If Briar is not set to \"Manage manually\" in the \"App launch\" screen, it will not be able to run in the background.</string>
 	<string name="warning_dozed">%s was unable to run in the background</string>
 
 	<!-- Login -->