Merge "Fix forgot adding textEditSuggestionHighlightStyle to dark theme." into nyc-dev
diff --git a/core/java/android/os/FileUtils.java b/core/java/android/os/FileUtils.java
index 1b79497..dd73e53 100644
--- a/core/java/android/os/FileUtils.java
+++ b/core/java/android/os/FileUtils.java
@@ -605,6 +605,30 @@
      */
     public static File buildUniqueFile(File parent, String mimeType, String displayName)
             throws FileNotFoundException {
+        final String[] parts = splitFileName(mimeType, displayName);
+        final String name = parts[0];
+        final String ext = parts[1];
+        File file = buildFile(parent, name, ext);
+
+        // If conflicting file, try adding counter suffix
+        int n = 0;
+        while (file.exists()) {
+            if (n++ >= 32) {
+                throw new FileNotFoundException("Failed to create unique file");
+            }
+            file = buildFile(parent, name + " (" + n + ")", ext);
+        }
+
+        return file;
+    }
+
+    /**
+     * Splits file name into base name and extension.
+     * If the display name doesn't have an extension that matches the requested MIME type, the
+     * extension is regarded as a part of filename and default extension for that MIME type is
+     * appended.
+     */
+    public static String[] splitFileName(String mimeType, String displayName) {
         String name;
         String ext;
 
@@ -642,18 +666,11 @@
             }
         }
 
-        File file = buildFile(parent, name, ext);
-
-        // If conflicting file, try adding counter suffix
-        int n = 0;
-        while (file.exists()) {
-            if (n++ >= 32) {
-                throw new FileNotFoundException("Failed to create unique file");
-            }
-            file = buildFile(parent, name + " (" + n + ")", ext);
+        if (ext == null) {
+            ext = "";
         }
 
-        return file;
+        return new String[] { name, ext };
     }
 
     private static File buildFile(File parent, String name, String ext) {
diff --git a/core/java/android/text/style/TtsSpan.java b/core/java/android/text/style/TtsSpan.java
index 93a156b..e9153dd 100644
--- a/core/java/android/text/style/TtsSpan.java
+++ b/core/java/android/text/style/TtsSpan.java
@@ -1013,7 +1013,7 @@
          * @return This instance.
          */
         public MeasureBuilder setIntegerPart(long integerPart) {
-            return setNumber(String.valueOf(integerPart));
+            return setIntegerPart(String.valueOf(integerPart));
         }
 
         /**
diff --git a/core/java/android/widget/TextView.java b/core/java/android/widget/TextView.java
index fbedbda..8a1a8c5 100644
--- a/core/java/android/widget/TextView.java
+++ b/core/java/android/widget/TextView.java
@@ -6552,7 +6552,7 @@
                 if (TextUtils.equals(content.subSequence(start, end), text.text)) {
                     if (text.text instanceof Spanned) {
                         // OK to copy spans only.
-                        TextUtils.copySpansFrom((Spanned) text.text, start, end,
+                        TextUtils.copySpansFrom((Spanned) text.text, 0, end - start,
                                 Object.class, content, start);
                     }
                 } else {
diff --git a/packages/DocumentsUI/app-perf-tests/Android.mk b/packages/DocumentsUI/app-perf-tests/Android.mk
new file mode 100644
index 0000000..3f12906
--- /dev/null
+++ b/packages/DocumentsUI/app-perf-tests/Android.mk
@@ -0,0 +1,18 @@
+LOCAL_PATH := $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_MODULE_TAGS := tests
+#LOCAL_SDK_VERSION := current
+
+LOCAL_SRC_FILES := $(call all-java-files-under, src) \
+
+LOCAL_JAVA_LIBRARIES := android-support-v4 android.test.runner
+LOCAL_STATIC_JAVA_LIBRARIES := mockito-target ub-uiautomator
+
+LOCAL_PACKAGE_NAME := DocumentsUIAppPerfTests
+LOCAL_INSTRUMENTATION_FOR := DocumentsUI
+
+LOCAL_CERTIFICATE := platform
+
+include $(BUILD_PACKAGE)
+
diff --git a/packages/DocumentsUI/app-perf-tests/AndroidManifest.xml b/packages/DocumentsUI/app-perf-tests/AndroidManifest.xml
new file mode 100644
index 0000000..1c3ed80
--- /dev/null
+++ b/packages/DocumentsUI/app-perf-tests/AndroidManifest.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.android.documentsui.appperftests">
+
+    <application>
+        <uses-library android:name="android.test.runner" />
+
+        <activity
+            android:name="com.android.documentsui.LauncherActivity" />
+    </application>
+
+    <!-- This package instrumentates itself, so the DocumentsUI process can be killed without
+         killing the testing package. -->
+    <instrumentation android:name="android.test.InstrumentationTestRunner"
+        android:targetPackage="com.android.documentsui.appperftests"
+        android:label="App performance tests for DocumentsUI" />
+
+</manifest>
diff --git a/packages/DocumentsUI/app-perf-tests/src/com/android/documentsui/FilesAppPerfTest.java b/packages/DocumentsUI/app-perf-tests/src/com/android/documentsui/FilesAppPerfTest.java
new file mode 100644
index 0000000..d6e8a96
--- /dev/null
+++ b/packages/DocumentsUI/app-perf-tests/src/com/android/documentsui/FilesAppPerfTest.java
@@ -0,0 +1,102 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * 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.
+ */
+
+package com.android.documentsui;
+
+import android.app.Activity;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.os.Bundle;
+import android.provider.DocumentsContract;
+import android.support.test.uiautomator.UiDevice;
+import android.test.InstrumentationTestCase;
+import android.test.suitebuilder.annotation.LargeTest;
+import android.util.Log;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.concurrent.CountDownLatch;
+
+@LargeTest
+public class FilesAppPerfTest extends InstrumentationTestCase {
+
+    // Keys used to report metrics to APCT.
+    private static final String KEY_FILES_COLD_START_PERFORMANCE_MEDIAN =
+            "files-cold-start-performance-median";
+    private static final String KEY_FILES_WARM_START_PERFORMANCE_MEDIAN =
+            "files-warm-start-performance-median";
+
+    private static final String TARGET_PACKAGE = "com.android.documentsui";
+
+    private static final int NUM_MEASUREMENTS = 10;
+
+    private LauncherActivity mActivity;
+    private UiDevice mDevice;
+
+    @Override
+    public void setUp() {
+        mDevice = UiDevice.getInstance(getInstrumentation());
+    }
+
+    public void testFilesColdStartPerformance() throws Exception {
+        runFilesStartPerformanceTest(true);
+    }
+
+    public void testFilesWarmStartPerformance() throws Exception {
+        runFilesStartPerformanceTest(false);
+    }
+
+    public void runFilesStartPerformanceTest(boolean cold) throws Exception {
+        long[] measurements = new long[NUM_MEASUREMENTS];
+        for (int i = 0; i < NUM_MEASUREMENTS; i++) {
+            if (cold) {
+                // Kill all providers, as well as DocumentsUI to measure a cold start.
+                killProviders();
+                mDevice.executeShellCommand("am force-stop " + TARGET_PACKAGE);
+            }
+            mDevice.waitForIdle();
+
+            LauncherActivity.testCaseLatch = new CountDownLatch(1);
+            mActivity = launchActivity(getInstrumentation().getTargetContext().getPackageName(),
+                    LauncherActivity.class, null);
+            LauncherActivity.testCaseLatch.await();
+            measurements[i] = LauncherActivity.measurement;
+        }
+
+        reportMetrics(cold ? KEY_FILES_COLD_START_PERFORMANCE_MEDIAN
+                : KEY_FILES_WARM_START_PERFORMANCE_MEDIAN, measurements);
+    }
+
+    private void reportMetrics(String key, long[] measurements) {
+        final Bundle status = new Bundle();
+        Arrays.sort(measurements);
+        final long median = measurements[NUM_MEASUREMENTS / 2 - 1];
+        status.putDouble(key, median);
+
+        getInstrumentation().sendStatus(Activity.RESULT_OK, status);
+    }
+
+    private void killProviders() throws Exception {
+        final PackageManager pm = getInstrumentation().getContext().getPackageManager();
+        final Intent intent = new Intent(DocumentsContract.PROVIDER_INTERFACE);
+        final List<ResolveInfo> providers = pm.queryIntentContentProviders(intent, 0);
+        for (ResolveInfo info : providers) {
+            final String packageName = info.providerInfo.packageName;
+            mDevice.executeShellCommand("am force-stop " + packageName);
+        }
+    }
+}
diff --git a/packages/DocumentsUI/app-perf-tests/src/com/android/documentsui/LauncherActivity.java b/packages/DocumentsUI/app-perf-tests/src/com/android/documentsui/LauncherActivity.java
new file mode 100644
index 0000000..21fc52e
--- /dev/null
+++ b/packages/DocumentsUI/app-perf-tests/src/com/android/documentsui/LauncherActivity.java
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * 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.
+ */
+
+package com.android.documentsui;
+
+import static com.android.documentsui.Shared.EXTRA_BENCHMARK;
+
+import android.app.Activity;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.os.Bundle;
+import android.os.Handler;
+import android.util.Log;
+
+import java.util.concurrent.CountDownLatch;
+
+public class LauncherActivity extends Activity {
+    private static final String TARGET_PACKAGE = "com.android.documentsui";
+    private static final int BENCHMARK_REQUEST_CODE = 1986;
+
+    public static CountDownLatch testCaseLatch = null;
+    public static long measurement = -1;
+
+    private long mStartTime = -1;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        new Handler().post(new Runnable() {
+            @Override public void run() {
+                final Intent intent = new Intent("android.intent.action.OPEN_DOCUMENT");
+                intent.addCategory(Intent.CATEGORY_OPENABLE);
+                intent.putExtra(EXTRA_BENCHMARK, true);
+                intent.setType("*/*");
+
+                mStartTime = System.currentTimeMillis();
+                startActivityForResult(intent, BENCHMARK_REQUEST_CODE);
+            }
+        });
+    }
+
+    @Override
+    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
+        if (requestCode == BENCHMARK_REQUEST_CODE) {
+            measurement = System.currentTimeMillis() - mStartTime;
+            testCaseLatch.countDown();
+            finish();
+        }
+    }
+}
diff --git a/packages/DocumentsUI/src/com/android/documentsui/BaseActivity.java b/packages/DocumentsUI/src/com/android/documentsui/BaseActivity.java
index c51cbb3..fe61094 100644
--- a/packages/DocumentsUI/src/com/android/documentsui/BaseActivity.java
+++ b/packages/DocumentsUI/src/com/android/documentsui/BaseActivity.java
@@ -17,6 +17,7 @@
 package com.android.documentsui;
 
 import static com.android.documentsui.Shared.DEBUG;
+import static com.android.documentsui.Shared.EXTRA_BENCHMARK;
 import static com.android.documentsui.State.MODE_GRID;
 
 import android.app.Activity;
@@ -30,6 +31,9 @@
 import android.net.Uri;
 import android.os.AsyncTask;
 import android.os.Bundle;
+import android.os.Handler;
+import android.os.MessageQueue;
+import android.os.MessageQueue.IdleHandler;
 import android.provider.DocumentsContract;
 import android.provider.DocumentsContract.Root;
 import android.support.annotation.CallSuper;
@@ -60,6 +64,8 @@
 public abstract class BaseActivity extends Activity
         implements SearchManagerListener, NavigationView.Environment {
 
+    private static final String BENCHMARK_TESTING_PACKAGE = "com.android.documentsui.appperftests";
+
     State mState;
     RootsCache mRoots;
     SearchViewManager mSearchManager;
@@ -92,11 +98,20 @@
     public void onCreate(Bundle icicle) {
         super.onCreate(icicle);
 
+        final Intent intent = getIntent();
+
+        // If startup benchmark is requested by a whitelisted testing package, then close the
+        // activity once idle, and notify the testing activity.
+        if (intent.getBooleanExtra(EXTRA_BENCHMARK, false) &&
+                BENCHMARK_TESTING_PACKAGE.equals(getCallingPackage())) {
+            closeOnIdleForTesting();
+        }
+
         setContentView(mLayoutId);
 
         mDrawer = DrawerController.create(this);
         mState = getState(icicle);
-        Metrics.logActivityLaunch(this, mState, getIntent());
+        Metrics.logActivityLaunch(this, mState, intent);
 
         mRoots = DocumentsApplication.getRootsCache(this);
 
@@ -668,6 +683,33 @@
         }
     }
 
+    /**
+     * Closes the activity when it's idle. Used only for tests.
+     */
+    private void closeOnIdleForTesting() {
+        addEventListener(new EventListener() {
+            @Override
+            public void onDirectoryNavigated(Uri uri) {
+            }
+
+            @Override
+            public void onDirectoryLoaded(Uri uri) {
+                getMainLooper().getQueue().addIdleHandler(new IdleHandler() {
+                    @Override
+                    public boolean queueIdle() {
+                        setResult(RESULT_OK);
+                        finish();
+                        return false;
+                    }
+                });
+                new Handler().post(new Runnable() {
+                    @Override public void run() {
+                    }
+                });
+            }
+        });
+    }
+
     private static final class HandleRootsChangedTask
             extends PairedTask<BaseActivity, RootInfo, RootInfo> {
         DocumentInfo mDownloadsDocument;
diff --git a/packages/DocumentsUI/src/com/android/documentsui/Shared.java b/packages/DocumentsUI/src/com/android/documentsui/Shared.java
index b539421..c32bbff 100644
--- a/packages/DocumentsUI/src/com/android/documentsui/Shared.java
+++ b/packages/DocumentsUI/src/com/android/documentsui/Shared.java
@@ -86,6 +86,11 @@
      */
     public static final String EXTRA_IGNORE_STATE = "ignoreState";
 
+    /**
+     * Extra for an Intent for enabling performance benchmark. Used only by tests.
+     */
+    public static final String EXTRA_BENCHMARK = "com.android.documentsui.benchmark";
+
     private static final Collator sCollator;
 
     static {
@@ -133,8 +138,7 @@
 
     /**
      * Compare two strings against each other using system default collator in a
-     * case-insensitive mode. Clusters strings prefixed with {@link DIR_PREFIX}
-     * before other items.
+     * case-insensitive mode.
      */
     public static int compareToIgnoreCaseNullable(String lhs, String rhs) {
         final boolean leftEmpty = TextUtils.isEmpty(lhs);
diff --git a/packages/MtpDocumentsProvider/src/com/android/mtp/exceptions/BusyDeviceException.java b/packages/MtpDocumentsProvider/src/com/android/mtp/BusyDeviceException.java
similarity index 83%
rename from packages/MtpDocumentsProvider/src/com/android/mtp/exceptions/BusyDeviceException.java
rename to packages/MtpDocumentsProvider/src/com/android/mtp/BusyDeviceException.java
index 55f55b0..83488cd 100644
--- a/packages/MtpDocumentsProvider/src/com/android/mtp/exceptions/BusyDeviceException.java
+++ b/packages/MtpDocumentsProvider/src/com/android/mtp/BusyDeviceException.java
@@ -14,12 +14,15 @@
  * limitations under the License.
  */
 
-package com.android.mtp.exceptions;
+package com.android.mtp;
 
 import java.io.IOException;
 
 /**
  * Exception thrown when the device is busy and the requested operation cannon be completed.
  */
-public class BusyDeviceException extends IOException {
+class BusyDeviceException extends IOException {
+    BusyDeviceException() {
+        super("The MTP device is busy.");
+    }
 }
diff --git a/packages/MtpDocumentsProvider/src/com/android/mtp/MtpDocumentsProvider.java b/packages/MtpDocumentsProvider/src/com/android/mtp/MtpDocumentsProvider.java
index 4582226..68c1992 100644
--- a/packages/MtpDocumentsProvider/src/com/android/mtp/MtpDocumentsProvider.java
+++ b/packages/MtpDocumentsProvider/src/com/android/mtp/MtpDocumentsProvider.java
@@ -30,6 +30,8 @@
 import android.net.Uri;
 import android.os.Bundle;
 import android.os.CancellationSignal;
+import android.os.FileUriExposedException;
+import android.os.FileUtils;
 import android.os.ParcelFileDescriptor;
 import android.os.storage.StorageManager;
 import android.provider.DocumentsContract.Document;
@@ -41,7 +43,6 @@
 
 import com.android.internal.annotations.GuardedBy;
 import com.android.internal.annotations.VisibleForTesting;
-import com.android.mtp.exceptions.BusyDeviceException;
 
 import java.io.FileNotFoundException;
 import java.io.IOException;
@@ -324,25 +325,61 @@
         if (DEBUG) {
             Log.d(TAG, "createDocument: " + displayName);
         }
+        final Identifier parentId;
+        final MtpDeviceRecord record;
+        final ParcelFileDescriptor[] pipe;
         try {
-            final Identifier parentId = mDatabase.createIdentifier(parentDocumentId);
+            parentId = mDatabase.createIdentifier(parentDocumentId);
             openDevice(parentId.mDeviceId);
-            final MtpDeviceRecord record = getDeviceToolkit(parentId.mDeviceId).mDeviceRecord;
+            record = getDeviceToolkit(parentId.mDeviceId).mDeviceRecord;
             if (!MtpDeviceRecord.isWritingSupported(record.operationsSupported)) {
-                throw new UnsupportedOperationException();
+                throw new UnsupportedOperationException(
+                        "Writing operation is not supported by the device.");
             }
-            final ParcelFileDescriptor pipe[] = ParcelFileDescriptor.createReliablePipe();
-            pipe[0].close();  // 0 bytes for a new document.
-            final int formatCode = Document.MIME_TYPE_DIR.equals(mimeType) ?
-                    MtpConstants.FORMAT_ASSOCIATION :
-                    MediaFile.getFormatCode(displayName, mimeType);
-            final MtpObjectInfo info = new MtpObjectInfo.Builder()
-                    .setStorageId(parentId.mStorageId)
-                    .setParent(parentId.mObjectHandle)
-                    .setFormat(formatCode)
-                    .setName(displayName)
-                    .build();
-            final int objectHandle = mMtpManager.createDocument(parentId.mDeviceId, info, pipe[1]);
+            pipe = ParcelFileDescriptor.createReliablePipe();
+            int objectHandle = -1;
+            MtpObjectInfo info = null;
+            try {
+                pipe[0].close();  // 0 bytes for a new document.
+
+                final int formatCode = Document.MIME_TYPE_DIR.equals(mimeType) ?
+                        MtpConstants.FORMAT_ASSOCIATION :
+                        MediaFile.getFormatCode(displayName, mimeType);
+                info = new MtpObjectInfo.Builder()
+                        .setStorageId(parentId.mStorageId)
+                        .setParent(parentId.mObjectHandle)
+                        .setFormat(formatCode)
+                        .setName(displayName)
+                        .build();
+
+                final String[] parts = FileUtils.splitFileName(mimeType, displayName);
+                final String baseName = parts[0];
+                final String extension = parts[1];
+                for (int i = 0; i <= 32; i++) {
+                    final MtpObjectInfo infoUniqueName;
+                    if (i == 0) {
+                        infoUniqueName = info;
+                    } else {
+                        infoUniqueName = new MtpObjectInfo.Builder(info).setName(
+                                baseName + " (" + i + ")." + extension).build();
+                    }
+                    try {
+                        objectHandle = mMtpManager.createDocument(
+                                parentId.mDeviceId, infoUniqueName, pipe[1]);
+                        break;
+                    } catch (SendObjectInfoFailure exp) {
+                        // This can be caused when we have an existing file with the same name.
+                        continue;
+                    }
+                }
+            } finally {
+                pipe[1].close();
+            }
+            if (objectHandle == -1) {
+                throw new IllegalArgumentException(
+                        "The file name \"" + displayName + "\" is conflicted with existing files " +
+                        "and the provider failed to find unique name.");
+            }
             final MtpObjectInfo infoWithHandle =
                     new MtpObjectInfo.Builder(info).setObjectHandle(objectHandle).build();
             final String documentId = mDatabase.putNewDocument(
@@ -351,9 +388,12 @@
             getDocumentLoader(parentId).clearTask(parentId);
             notifyChildDocumentsChange(parentDocumentId);
             return documentId;
+        } catch (FileNotFoundException | RuntimeException error) {
+            Log.e(TAG, "createDocument", error);
+            throw error;
         } catch (IOException error) {
             Log.e(TAG, "createDocument", error);
-            throw new FileNotFoundException(error.getMessage());
+            throw new IllegalStateException(error);
         }
     }
 
diff --git a/packages/MtpDocumentsProvider/src/com/android/mtp/MtpManager.java b/packages/MtpDocumentsProvider/src/com/android/mtp/MtpManager.java
index 0202343..6fb2a78 100644
--- a/packages/MtpDocumentsProvider/src/com/android/mtp/MtpManager.java
+++ b/packages/MtpDocumentsProvider/src/com/android/mtp/MtpManager.java
@@ -33,7 +33,6 @@
 import android.util.SparseArray;
 
 import com.android.internal.annotations.VisibleForTesting;
-import com.android.mtp.exceptions.BusyDeviceException;
 
 import java.io.FileNotFoundException;
 import java.io.IOException;
@@ -190,7 +189,7 @@
         synchronized (device) {
             final MtpObjectInfo sendObjectInfoResult = device.sendObjectInfo(objectInfo);
             if (sendObjectInfoResult == null) {
-                throw new IOException("Failed to create a document");
+                throw new SendObjectInfoFailure();
             }
             if (objectInfo.getFormat() != MtpConstants.FORMAT_ASSOCIATION) {
                 if (!device.sendObject(sendObjectInfoResult.getObjectHandle(),
diff --git a/packages/MtpDocumentsProvider/src/com/android/mtp/exceptions/BusyDeviceException.java b/packages/MtpDocumentsProvider/src/com/android/mtp/SendObjectInfoFailure.java
similarity index 75%
copy from packages/MtpDocumentsProvider/src/com/android/mtp/exceptions/BusyDeviceException.java
copy to packages/MtpDocumentsProvider/src/com/android/mtp/SendObjectInfoFailure.java
index 55f55b0..db7d777 100644
--- a/packages/MtpDocumentsProvider/src/com/android/mtp/exceptions/BusyDeviceException.java
+++ b/packages/MtpDocumentsProvider/src/com/android/mtp/SendObjectInfoFailure.java
@@ -14,12 +14,15 @@
  * limitations under the License.
  */
 
-package com.android.mtp.exceptions;
+package com.android.mtp;
 
 import java.io.IOException;
 
 /**
- * Exception thrown when the device is busy and the requested operation cannon be completed.
+ * Exception thrown when sendObjectInfo failed.
  */
-public class BusyDeviceException extends IOException {
+class SendObjectInfoFailure extends IOException {
+    SendObjectInfoFailure() {
+        super("Failed to MtpDevice#sendObjectInfo.");
+    }
 }
diff --git a/packages/MtpDocumentsProvider/tests/src/com/android/mtp/MtpDocumentsProviderTest.java b/packages/MtpDocumentsProvider/tests/src/com/android/mtp/MtpDocumentsProviderTest.java
index afcb457..9c1880a 100644
--- a/packages/MtpDocumentsProvider/tests/src/com/android/mtp/MtpDocumentsProviderTest.java
+++ b/packages/MtpDocumentsProvider/tests/src/com/android/mtp/MtpDocumentsProviderTest.java
@@ -30,8 +30,6 @@
 import android.test.AndroidTestCase;
 import android.test.suitebuilder.annotation.MediumTest;
 
-import com.android.mtp.exceptions.BusyDeviceException;
-
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.util.Arrays;