cmds/uiautomator/library/core-src/com/android/uiautomator/core/UiAutomatorBridge.java

package com.android.uiautomator.core;

import android.accessibilityservice.AccessibilityServiceInfo;
import android.app.UiAutomation;
import android.app.UiAutomation.AccessibilityEventFilter;
import android.app.UiAutomation.OnAccessibilityEventListener;
import android.graphics.Bitmap;
import android.util.Log;
import android.view.Display;
import android.view.InputEvent;
import android.view.accessibility.AccessibilityEvent;
import android.view.accessibility.AccessibilityNodeInfo;

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.concurrent.TimeoutException;

/**
 * @hide
 */
public abstract class UiAutomatorBridge {

    private static final String LOG_TAG = UiAutomatorBridge.class.getSimpleName();

   /**
    * This value has the greatest bearing on the appearance of test execution speeds.
    * This value is used as the minimum time to wait before considering the UI idle after
    * each action.
    */
    private static final long QUIET_TIME_TO_BE_CONSIDERD_IDLE_STATE = 500;//ms

   /**
    * This is the maximum time the automation will wait for the UI to go idle. Execution
    * will resume normally anyway. This is to prevent waiting forever on display updates
    * that may be related to spinning wheels or progress updates of sorts etc...
    */
    private static final long TOTAL_TIME_TO_WAIT_FOR_IDLE_STATE = 1000 * 10;//ms

    private final UiAutomation mUiAutomation;

    private final InteractionController mInteractionController;

    private final QueryController mQueryController;

    UiAutomatorBridge(UiAutomation uiAutomation) {
        mUiAutomation = uiAutomation;
        mInteractionController = new InteractionController(this);
        mQueryController = new QueryController(this);
    }

    InteractionController getInteractionController() {
        return mInteractionController;
    }

    QueryController getQueryController() {
        return mQueryController;
    }

    public void setOnAccessibilityEventListener(OnAccessibilityEventListener listener) {
        mUiAutomation.setOnAccessibilityEventListener(listener);
    }

    public AccessibilityNodeInfo getRootInActiveWindow() {
        return mUiAutomation.getRootInActiveWindow();
    }

    public boolean injectInputEvent(InputEvent event, boolean sync) {
        return mUiAutomation.injectInputEvent(event, sync);
    }

    public boolean setRotation(int rotation) {
        return mUiAutomation.setRotation(rotation);
    }

    public void setCompressedLayoutHierarchy(boolean compressed) {
        AccessibilityServiceInfo info = mUiAutomation.getServiceInfo();
        if (compressed)
            info.flags &= ~AccessibilityServiceInfo.FLAG_INCLUDE_NOT_IMPORTANT_VIEWS;
        else
            info.flags |= AccessibilityServiceInfo.FLAG_INCLUDE_NOT_IMPORTANT_VIEWS;
        mUiAutomation.setServiceInfo(info);
    }

    public abstract int getRotation();

    public abstract boolean isScreenOn();

    public void waitForIdle() {
        waitForIdle(TOTAL_TIME_TO_WAIT_FOR_IDLE_STATE);
    }

    public void waitForIdle(long timeout) {
        try {
            mUiAutomation.waitForIdle(QUIET_TIME_TO_BE_CONSIDERD_IDLE_STATE, timeout);
        } catch (TimeoutException te) {
            Log.w(LOG_TAG, "Could not detect idle state.", te);
        }
    }

    public AccessibilityEvent executeCommandAndWaitForAccessibilityEvent(Runnable command,
            AccessibilityEventFilter filter, long timeoutMillis) throws TimeoutException {
        return mUiAutomation.executeAndWaitForEvent(command,
                filter, timeoutMillis);
    }

    public boolean takeScreenshot(File storePath, int quality) {
        Bitmap screenshot = mUiAutomation.takeScreenshot();
        if (screenshot == null) {
            return false;
        }
        BufferedOutputStream bos = null;
        try {
            bos = new BufferedOutputStream(new FileOutputStream(storePath));
            if (bos != null) {
                screenshot.compress(Bitmap.CompressFormat.PNG, quality, bos);
                bos.flush();
            }
        } catch (IOException ioe) {
            Log.e(LOG_TAG, "failed to save screen shot to file", ioe);
            return false;
        } finally {
            if (bos != null) {
                try {
                    bos.close();
                } catch (IOException ioe) {
                    /* ignore */
                }
            }
            screenshot.recycle();
        }
        return true;
    }

    public boolean performGlobalAction(int action) {
        return mUiAutomation.performGlobalAction(action);
    }

    public abstract Display getDefaultDisplay();

    public abstract long getSystemLongPressTime();
}