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ScreenshotTest.javaAPI DocAndroid 5.1 API5300Thu Mar 12 22:22:42 GMT 2015com.android.systemui.screenshot

ScreenshotTest

public class ScreenshotTest extends android.test.ActivityInstrumentationTestCase2
Functional tests for the global screenshot feature.

Fields Summary
private static final String
LOG_TAG
private static final int
SCREEN_WAIT_TIME_SEC
Constructors Summary
public ScreenshotTest()


      
        super(ScreenshotStubActivity.class);
Methods Summary
private java.io.FilegetScreenshotDir()
Get the directory where screenshot images are stored.

        // TODO: get this dir location from a constant
        return new File(Environment.getExternalStorageDirectory(), "Pictures" + File.separator +
                "Screenshots");
private booleanisValidImage(java.io.File screenshotFile)
Return true if file is valid image file

        Bitmap b = BitmapFactory.decodeFile(screenshotFile.getAbsolutePath());
        // TODO: do more checks on image
        return b != null;
private voidtakeScreenshot()
Inject the key sequence to take a screenshot.

        getInstrumentation().sendKeySync(new KeyEvent(KeyEvent.ACTION_DOWN,
                KeyEvent.KEYCODE_POWER));
        getInstrumentation().sendKeySync(new KeyEvent(KeyEvent.ACTION_DOWN,
                KeyEvent.KEYCODE_VOLUME_DOWN));
        // the volume down key event will cause the 'volume adjustment' UI to appear in the
        // foreground, and steal UI focus
        // unfortunately this means the next key event will get directed to the
        // 'volume adjustment' UI, instead of this test's activity
        // for this reason this test must be signed with platform certificate, to grant this test
        // permission to inject key events to another process
        getInstrumentation().sendKeySync(new KeyEvent(KeyEvent.ACTION_UP,
                KeyEvent.KEYCODE_VOLUME_DOWN));
        getInstrumentation().sendKeySync(new KeyEvent(KeyEvent.ACTION_UP,
                KeyEvent.KEYCODE_POWER));
public voidtestScreenshot()
A simple test for screenshots that launches an Activity, injects the key event combo to trigger the screenshot, and verifies the screenshot was taken successfully.

        if (true) {
            // Disable until this works again.
            return;
        }
        Log.d(LOG_TAG, "starting testScreenshot");
        // launch the activity.
        ScreenshotStubActivity activity = getActivity();
        assertNotNull(activity);

        File screenshotDir = getScreenshotDir();
        NewScreenshotObserver observer = new NewScreenshotObserver(
                screenshotDir.getAbsolutePath());
        observer.startWatching();
        takeScreenshot();
        // unlikely, but check if a new screenshot file was already created
        if (observer.getCreatedPath() == null) {
            // wait for screenshot to be created
            synchronized(observer) {
                observer.wait(SCREEN_WAIT_TIME_SEC*1000);
            }
        }
        assertNotNull(String.format("Could not find screenshot after %d seconds",
                SCREEN_WAIT_TIME_SEC), observer.getCreatedPath());

        File screenshotFile = new File(screenshotDir, observer.getCreatedPath());
        try {
            assertTrue(String.format("Detected new screenshot %s but its not a file",
                    screenshotFile.getName()), screenshotFile.isFile());
            assertTrue(String.format("Detected new screenshot %s but its not an image",
                    screenshotFile.getName()), isValidImage(screenshotFile));
        } finally {
            // delete the file to prevent external storage from filing up
            screenshotFile.delete();
        }