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/*
* Copyright (C) 2013 DroidDriver committers
*
* 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 io.appium.droiddriver.instrumentation;
import android.os.Build;
import android.view.View;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.List;
import io.appium.droiddriver.exceptions.DroidDriverException;
/**
* Class to find the root view.
*/
public class RootFinder {
private static final String VIEW_FIELD_NAME = "mViews";
private static final Field viewsField;
private static final Object windowManagerObj;
static {
String windowManagerClassName =
Build.VERSION.SDK_INT >= 17 ? "android.view.WindowManagerGlobal"
: "android.view.WindowManagerImpl";
String instanceMethod = Build.VERSION.SDK_INT >= 17 ? "getInstance" : "getDefault";
try {
Class<?> clazz = Class.forName(windowManagerClassName);
Method getMethod = clazz.getMethod(instanceMethod);
windowManagerObj = getMethod.invoke(null);
viewsField = clazz.getDeclaredField(VIEW_FIELD_NAME);
viewsField.setAccessible(true);
} catch (InvocationTargetException ite) {
throw new DroidDriverException(String.format("could not invoke: %s on %s", instanceMethod,
windowManagerClassName), ite.getCause());
} catch (ClassNotFoundException cnfe) {
throw new DroidDriverException(String.format("could not find class: %s",
windowManagerClassName), cnfe);
} catch (NoSuchFieldException nsfe) {
throw new DroidDriverException(String.format("could not find field: %s on %s",
VIEW_FIELD_NAME, windowManagerClassName), nsfe);
} catch (NoSuchMethodException nsme) {
throw new DroidDriverException(String.format("could not find method: %s on %s",
instanceMethod, windowManagerClassName), nsme);
} catch (RuntimeException re) {
throw new DroidDriverException(String.format(
"reflective setup failed using obj: %s method: %s field: %s", windowManagerClassName,
instanceMethod, VIEW_FIELD_NAME), re);
} catch (IllegalAccessException iae) {
throw new DroidDriverException(String.format(
"reflective setup failed using obj: %s method: %s field: %s", windowManagerClassName,
instanceMethod, VIEW_FIELD_NAME), iae);
}
}
/**
* @return a list of {@link View}s.
*/
@SuppressWarnings("unchecked")
public static List<View> getRootViews() {
List<View> views = null;
try {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
views = (List<View>) viewsField.get(windowManagerObj);
} else {
views = Arrays.asList((View[]) viewsField.get(windowManagerObj));
}
return views;
} catch (RuntimeException re) {
throw new DroidDriverException(String.format("Reflective access to %s on %s failed.",
viewsField, windowManagerObj), re);
} catch (IllegalAccessException iae) {
throw new DroidDriverException(String.format("Reflective access to %s on %s failed.",
viewsField, windowManagerObj), iae);
}
}
}
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