Java Code Examples for android.app.Activity#getParent()

private static void restartActivity(Activity activity) {
	if (Log.isLoggable("InstantRun", 2)) {
		Log.v("InstantRun", "About to restart "
				+ activity.getClass().getSimpleName());
	}
	while (activity.getParent() != null) {
		if (Log.isLoggable("InstantRun", 2)) {
			Log.v("InstantRun", activity.getClass().getSimpleName()
					+ " is not a top level activity; restarting "
					+ activity.getParent().getClass().getSimpleName()
					+ " instead");
		}
		activity = activity.getParent();
	}
	activity.recreate();
}
 

@Override
public void callActivityOnDestroy(Activity activity) {
    mHostInstr.callActivityOnDestroy(activity);
    if (activity.getParent() != null) {
        return;
    }

    final Intent intent = activity.getIntent();
    String pkgName = IntentUtils.parsePkgNameFromActivity(activity);
    if (IntentUtils.isIntentForPlugin(intent)
            || intent == null) {
        // intent为null时，如果能够从Activity中解析出pkgName，也应该是插件的页面
        if (!TextUtils.isEmpty(pkgName)) {
            PluginDebugLog.runtimeLog(TAG, "callActivityOnDestroy: " + pkgName);
            PluginLoadedApk loadedApk = PluginManager.getPluginLoadedApkByPkgName(pkgName);
            if (loadedApk != null) {
                loadedApk.getActivityStackSupervisor().popActivityFromStack(activity);
            }
        }
    }
}
 

private static void restartActivity(Activity activity) {
    if (Log.isLoggable(LOG_TAG, Log.VERBOSE)) {
        Log.v(LOG_TAG, "About to restart " + activity.getClass().getSimpleName());
    }
    // You can't restart activities that have parents: find the top-most activity
    while (activity.getParent() != null) {
        if (Log.isLoggable(LOG_TAG, Log.VERBOSE)) {
            Log.v(LOG_TAG, activity.getClass().getSimpleName()
                    + " is not a top level activity; restarting "
                    + activity.getParent().getClass().getSimpleName() + " instead");
        }
        activity = activity.getParent();
    }
    // Directly supported by the framework!
    activity.recreate();
}
 

/**
 * 获取最顶层的父级Activity
 * @param activity 当前activity对象
 * @return 没有父级Activity则返回当前activity
 */
public static Activity getTopActivity(Activity activity){
	Activity topActivity=activity.getParent();
	Activity result=topActivity;
	while(topActivity!=null){
		topActivity=topActivity.getParent();
		if(topActivity!=null){
			result=topActivity;
		}
	}
	if(result==null){
		result=activity;
	}
	return result;
}
 

/**
 * 替换目标对象的window。
 *
 * @param activity Activity
 */
private static void replaceWindow(Activity activity) {
    Activity parent = activity.getParent();
    if (parent != null && parent instanceof ActivityProxy) {
        JavaCalls.setField(activity, "mWindow", parent.getWindow());
    }

    replaceWindowCallback(activity);
}
 

public static Activity scanForActivity(Context context) {
    if (context instanceof Activity) {
        Activity a = (Activity) context;
        if (a.getParent() != null)
            return a.getParent();
        else
            return a;
    } else if (context instanceof ContextWrapper) {
        return scanForActivity(((ContextWrapper) context).getBaseContext());
    }
    throw new IllegalStateException("context得不到activity");
}
 

/**
 * 开启activity
 * @param intent                            intent
 * @param activity                          上下文
 * @throws WebViewException                 异常，如果找不到，就会抛出异常，开发者也可以自己try-catch
 */
private static boolean startWithActivity(Intent intent, Activity activity) throws WebViewException {
    Activity target = activity.getParent();
    if (target == null) {
        target = activity;
    }
    try {
        intent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
        return target.startActivityIfNeeded(intent, -1);
    } catch (ActivityNotFoundException e) {
        throw new WebViewException(3,MESSAGE_UNKNOWN);
    }
}
 

/** force all open activity to recreate */
public static void recreate(Activity child) {
    Activity context = child;
    while (context != null) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
            context.recreate();
        } else {
            // https://stackoverflow.com/questions/11495130/android-recreate-functions-in-api-7
            context.startActivity(new Intent(context, context.getClass()));
            context.finish();
        }
        context = context.getParent();
    }
}
 

public static String getBreadcrumbs(final Activity activity) {
    Activity currentActivity = activity;
    ArrayList<String> breadcrumbs = new ArrayList<>();

    while (currentActivity != null) {
        breadcrumbs.add(currentActivity.getTitle().toString());
        currentActivity = currentActivity.getParent();
    }
    return joinSlash(breadcrumbs);
}
 

private ServiceToken bindToService(Activity context, ServiceConnection callback) {
    Activity realActivity = context.getParent();
    if (realActivity == null) {
        realActivity = context;
    }
    ContextWrapper cw = new ContextWrapper(realActivity);
    cw.startService(new Intent(cw, PlayerService.class));
    ServiceBinder sb = new ServiceBinder(callback);
    if (cw.bindService((new Intent()).setClass(cw, PlayerService.class), sb, 0)) {
        sConnectionMap.put(cw, sb);
        return new ServiceToken(cw);
    }
    Log.e(TAG, "Failed to bind to service");
    return null;
}
 

/**
 * onCallActivityOnCreate
 *
 * @param activity Activity
 */
private void onCallActivityOnCreate(Activity activity) {

    String packageName = activity.getPackageName();
    boolean isPlugin = isPlugin(packageName);

    if (!isPlugin) {
        return;
    }

    if (ProxyEnvironment.pluginHotStartTimeMap.get(packageName) != null) {
        long stamp = ProxyEnvironment.pluginHotStartTimeMap.get(packageName);
        long millis = SystemClock.elapsedRealtime() - stamp;
        if (stamp > -1 && millis > 0) {
            ReportManger.getInstance().onPluginHotLoad(activity.getApplicationContext(), packageName, millis);
            ProxyEnvironment.pluginHotStartTimeMap.remove(packageName);
        }
    }
    replacePluginPackageName2Host(activity);

    replaceSystemServices(activity);

    replaceWindow(activity);

    replaceExternalDirs(activity);

    // 初始化 activity layoutinflator and localactivity manager
    Activity parent = activity.getParent();
    if (parent != null && parent instanceof ActivityProxy) {
        ((ActivityProxy) parent).onBeforeCreate(activity);
    }

    if (Build.VERSION.SDK_INT < 23 /*Android m 6.0*/) {
        // bindservice trick begin
        // 如果在actiivty的 oncreate 中 binder service，token 中的 activity 对象为 null
        String className = "android.app.LocalActivityManager$LocalActivityRecord";
        Class clazz = null;
        try {
            clazz = Class.forName(className);
        } catch (ClassNotFoundException e) {
            if (DEBUG) {
                e.printStackTrace();
            }
        }

        IBinder token = JavaCalls.callMethod(activity.getBaseContext(), "getActivityToken");

        if (clazz != null && token != null && token.getClass().equals(clazz)) {
            Activity a = (Activity) JavaCalls.getField(token, "activity");
            if (a == null) {
                JavaCalls.setField(token, "activity", activity);
            }
        }
        // bindservice trick end
    } else {
        // 6.0 以上 Activity.mBase.mActvityToken 一直为 null，不使用也可以工作。
    }

}